'2019/10'에 해당되는 글 28건

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="5"
        android:orientation="vertical">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="50dp">

            <ImageView
                android:id="@+id/navibar_bg"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:adjustViewBounds="false"
                android:scaleType="fitXY"
                android:src="@drawable/navibar_bg" />

            <TextView
                android:id="@+id/navibar_text"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:gravity="center"
                android:singleLine="true"
                android:text="No Title"
                android:textColor="@android:color/white"
                android:textSize="22dp" />

            <Button
                android:id="@+id/list_btn"
                android:layout_width="30dp"
                android:layout_height="30dp"
                android:layout_centerVertical="true"
                android:layout_marginLeft="10dp"
                android:background="@drawable/btn_playlist" />

            <Button
                android:id="@+id/home_btn"
                android:layout_width="30dp"
                android:layout_height="30dp"
                android:layout_alignParentRight="true"
                android:layout_centerVertical="true"
                android:layout_marginRight="10dp"
                android:background="@drawable/btn_home_c" />

        </RelativeLayout>

        <fragment xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools"
            android:id="@+id/realtimemap"
            android:name="com.google.android.gms.maps.SupportMapFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </LinearLayout>

</LinearLayout>

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.os.Looper;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.PopupMenu;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.LocationSettingsRequest;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;

public class CurrentPlace extends AppCompatActivity implements View.OnClickListener, OnMapReadyCallback {
    private static final String TAG = CurrentPlace.class.getSimpleName();
    Context mContext;
    TextView title;

    private GoogleMap mMap;
    private Marker currentMarker = null;

    // The entry point to the Fused Location Provider.
    private FusedLocationProviderClient mFusedLocationProviderClient; // Deprecated된 FusedLocationApi를 대체
    private LocationRequest locationRequest;
    private Location mCurrentLocatiion;

    private final LatLng mDefaultLocation = new LatLng(37.56, 126.97);
    private static final int DEFAULT_ZOOM = 15;
    private static final int PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;
    private boolean mLocationPermissionGranted;

    private static final int GPS_ENABLE_REQUEST_CODE = 2001;
    private static final int UPDATE_INTERVAL_MS = 1000 * 60 * 15;  // LOG 찍어보니 이걸 주기로 하지 않는듯
    private static final int FASTEST_UPDATE_INTERVAL_MS = 1000 * 30 ; // 30초 단위로 화면 갱신

    private static final String KEY_CAMERA_POSITION = "camera_position";
    private static final String KEY_LOCATION = "location";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (savedInstanceState != null) {
            mCurrentLocatiion = savedInstanceState.getParcelable(KEY_LOCATION);
            CameraPosition mCameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION);
        }
        setContentView(R.layout.activity_current_place);
        mContext = CurrentPlace.this;

        // button action...
        findViewById(R.id.list_btn).setOnClickListener(this);
        findViewById(R.id.home_btn).setOnClickListener(this);

        // title set
        title = (TextView) this.findViewById(R.id.navibar_text); // title
        title.setText("실시간 위치 표시");

        locationRequest = new LocationRequest()
                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) // 정확도를 최우선적으로 고려
                .setInterval(UPDATE_INTERVAL_MS) // 위치가 Update 되는 주기
                .setFastestInterval(FASTEST_UPDATE_INTERVAL_MS); // 위치 획득후 업데이트되는 주기

        LocationSettingsRequest.Builder builder =
                new LocationSettingsRequest.Builder();

        builder.addLocationRequest(locationRequest);

        // Construct a FusedLocationProviderClient.
        mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);

        // Build the map.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.realtimemap);
        mapFragment.getMapAsync(this);
    }

    /**
     * Saves the state of the map when the activity is paused.
     */
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        if (mMap != null) {
            outState.putParcelable(KEY_CAMERA_POSITION, mMap.getCameraPosition());
            outState.putParcelable(KEY_LOCATION, mCurrentLocatiion);
            super.onSaveInstanceState(outState);
        }
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.list_btn:
                // 팝업 메뉴 나오게 하는 방법
                PopupMenu popupMenu = new PopupMenu(mContext, view);
                Menu menu = popupMenu.getMenu();
                menu.add(Menu.NONE,R.id.option_get_place,Menu.NONE, "Get Place");
                //menu.add(Menu.NONE,R.id.option_get_place,Menu.NONE, "");
                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId()) {
                            case R.id.option_get_place:
                                //showCurrentPlace(); // 아직 이 부분 미 구현
                                break;
                        }
                        return true;
                    }
                });
                popupMenu.show();
                break;
            case R.id.home_btn:
                Intent intent = new Intent(CurrentPlace.this, MainActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
                startActivity(intent);
            default:
                break;
        }
    }

    @Override
    public void onMapReady(GoogleMap map) {
        Log.e(TAG, "onMapReady :");

        mMap = map;

        setDefaultLocation(); // GPS를 찾지 못하는 장소에 있을 경우 지도의 초기 위치가 필요함.

        getLocationPermission();

        updateLocationUI();

        getDeviceLocation();
    }

    private void updateLocationUI() {
        if (mMap == null) {
            return;
        }
        try {
            if (mLocationPermissionGranted) {
                mMap.setMyLocationEnabled(true);
                mMap.getUiSettings().setMyLocationButtonEnabled(true);
            } else {
                mMap.setMyLocationEnabled(false);
                mMap.getUiSettings().setMyLocationButtonEnabled(false);
                mCurrentLocatiion = null;
                getLocationPermission();
            }
        } catch (SecurityException e)  {
            Log.e("Exception: %s", e.getMessage());
        }
    }

    private void setDefaultLocation() {
        if (currentMarker != null) currentMarker.remove();

        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(mDefaultLocation);
        markerOptions.title("위치정보 가져올 수 없음");
        markerOptions.snippet("위치 퍼미션과 GPS 활성 여부 확인하세요");
        markerOptions.draggable(true);
        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
        currentMarker = mMap.addMarker(markerOptions);

        CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(mDefaultLocation, 15);
        mMap.moveCamera(cameraUpdate);
    }

    String getCurrentAddress(LatLng latlng) {
        // 위치 정보와 지역으로부터 주소 문자열을 구한다.
        List<Address> addressList = null ;
        Geocoder geocoder = new Geocoder( this, Locale.getDefault());

        // 지오코더를 이용하여 주소 리스트를 구한다.
        try {
            addressList = geocoder.getFromLocation(latlng.latitude,latlng.longitude,1);
        } catch (IOException e) {
            Toast. makeText( this, "위치로부터 주소를 인식할 수 없습니다. 네트워크가 연결되어 있는지 확인해 주세요.", Toast.LENGTH_SHORT ).show();
            e.printStackTrace();
            return "주소 인식 불가" ;
        }

        if (addressList.size() < 1) { // 주소 리스트가 비어있는지 비어 있으면
            return "해당 위치에 주소 없음" ;
        }

        // 주소를 담는 문자열을 생성하고 리턴
        Address address = addressList.get(0);
        StringBuilder addressStringBuilder = new StringBuilder();
        for (int i = 0; i <= address.getMaxAddressLineIndex(); i++) {
            addressStringBuilder.append(address.getAddressLine(i));
            if (i < address.getMaxAddressLineIndex())
                addressStringBuilder.append("\n");
        }

        return addressStringBuilder.toString();
    }

    LocationCallback locationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(LocationResult locationResult) {
            super.onLocationResult(locationResult);

            List<Location> locationList = locationResult.getLocations();

            if (locationList.size() > 0) {
                Location location = locationList.get(locationList.size() - 1);

                LatLng currentPosition
                        = new LatLng(location.getLatitude(), location.getLongitude());

                String markerTitle = getCurrentAddress(currentPosition);
                String markerSnippet = "위도:" + String.valueOf(location.getLatitude())
                        + " 경도:" + String.valueOf(location.getLongitude());

                Log.d(TAG, "Time :" + CurrentTime() + " onLocationResult : " + markerSnippet);

                // Update 주기를 확인해보려고 시간을 찍어보았음.
                //현재 위치에 마커 생성하고 이동
                setCurrentLocation(location, markerTitle, markerSnippet);
                mCurrentLocatiion = location;
            }
        }

    };

    private String CurrentTime(){
        Date today = new Date();
        SimpleDateFormat date = new SimpleDateFormat("yyyy/MM/dd");
        SimpleDateFormat time = new SimpleDateFormat("hh:mm:ss a");
        return time.format(today);
    }

    public void setCurrentLocation(Location location, String markerTitle, String markerSnippet) {
        if (currentMarker != null) currentMarker.remove();

        LatLng currentLatLng = new LatLng(location.getLatitude(), location.getLongitude());

        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(currentLatLng);
        markerOptions.title(markerTitle);
        markerOptions.snippet(markerSnippet);
        markerOptions.draggable(true);

        currentMarker = mMap.addMarker(markerOptions);

        CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLng(currentLatLng);
        mMap.moveCamera(cameraUpdate);
    }

    private void getDeviceLocation() {
        try {
            if (mLocationPermissionGranted) {
                mFusedLocationProviderClient.requestLocationUpdates(locationRequest, locationCallback, Looper.myLooper());
            }
        } catch (SecurityException e)  {
            Log.e("Exception: %s", e.getMessage());
        }
    }

    private void getLocationPermission() {
        if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
                android.Manifest.permission.ACCESS_FINE_LOCATION)
                == PackageManager.PERMISSION_GRANTED) {
            mLocationPermissionGranted = true;
        } else {
            ActivityCompat.requestPermissions(this,
                    new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
                    PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           @NonNull String permissions[],
                                           @NonNull int[] grantResults) {
        mLocationPermissionGranted = false;
        switch (requestCode) {
            case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    mLocationPermissionGranted = true;
                }
            }
        }
        updateLocationUI();
    }

    @Override
    protected void onStart() {
        super.onStart();
        if (mLocationPermissionGranted) {
            Log.d(TAG, "onStart : requestLocationUpdates");
            mFusedLocationProviderClient.requestLocationUpdates(locationRequest, locationCallback, null);
            if (mMap!=null)
                mMap.setMyLocationEnabled(true);
        }
    }

    @Override
    protected void onStop() {
        super.onStop();
        if (mFusedLocationProviderClient != null) {
            Log.d(TAG, "onStop : removeLocationUpdates");
            mFusedLocationProviderClient.removeLocationUpdates(locationCallback);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mFusedLocationProviderClient != null) {
            Log.d(TAG, "onDestroy : removeLocationUpdates");
            mFusedLocationProviderClient.removeLocationUpdates(locationCallback);
        }
    }
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28


    defaultConfig {
        applicationId "com.link2me.android.googlemap"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        // multiDexEnabled true // minSdkVersion 이 21 이상인 경우 사용
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'androidx.cardview:cardview:1.0.0'
    implementation 'com.google.android.gms:play-services-maps:17.0.0'
    implementation 'com.google.android.gms:play-services-location:17.0.0'
    //implementation 'com.google.android.gms:play-services-places:16.0.0' // OLD
    //implementation 'com.google.android.libraries.places:places:2.0.0'  // NEW
    implementation 'com.google.android.libraries.places:places-compat:2.0.0'
    implementation 'gun0912.ted:tedpermission:2.0.0'
    implementation 'com.android.volley:volley:1.1.1'
    implementation 'com.github.bumptech.glide:glide:3.8.0' // 이미지 라이브러리
    implementation 'androidx.multidex:multidex:2.0.0' // minSdkVersion 이 21 이하인 경우 사용
    implementation 'com.google.android.material:material:1.2.0'
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MapsActivityCurrentPlace">

    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layoutDirection="locale"
    android:orientation="vertical">
    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:textColor="#ff000000"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/snippet"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#ff7f7f7f" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/option_get_place"
        android:title="Get Place"
        app:showAsAction="always" />
</menu>

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.current_place_menu, menu);
        return true;
    }
 

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.option_get_place) {
            showCurrentPlace();
        }
        return true;
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.list_btn:
                // 팝업 메뉴 나오게 하는 방법
                PopupMenu popupMenu = new PopupMenu(mContext, view);
                Menu menu = popupMenu.getMenu();
                menu.add(Menu.NONE,R.id.option_get_place,Menu.NONE, "Get Place");
                //menu.add(Menu.NONE,R.id.option_get_place,Menu.NONE, "");
                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId()) {
                            case R.id.option_get_place:
                                showCurrentPlace();
                                break;
                        }
                        return true;
                    }
                });
                popupMenu.show();
                break;
            case R.id.home_btn:
                Intent intent = new Intent(MapsActivityCurrentPlace.this, MainActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
                startActivity(intent);
            default:
                break;
        }
    }

package com.link2me.android.googlemap;

import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.PopupMenu;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.places.GeoDataClient;
import com.google.android.gms.location.places.PlaceDetectionClient;
import com.google.android.gms.location.places.PlaceLikelihood;
import com.google.android.gms.location.places.PlaceLikelihoodBufferResponse;
import com.google.android.gms.location.places.Places;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;

public class MapsActivityCurrentPlace extends AppCompatActivity implements View.OnClickListener, OnMapReadyCallback {
    // 현재 위치를 구글 지도에 표시하는 예제
    // https://developers.google.com/maps/documentation/android-sdk/current-place-tutorial 참조
    private static final String TAG = MapsActivityCurrentPlace.class.getSimpleName();
    Context mContext;
    TextView title;

    private GoogleMap mMap;
    private CameraPosition mCameraPosition;

    // The entry points to the Places API.
    private GeoDataClient mGeoDataClient;
    private PlaceDetectionClient mPlaceDetectionClient;

    // The entry point to the Fused Location Provider.
    private FusedLocationProviderClient mFusedLocationProviderClient;

    // A default location (Sydney, Australia) and default zoom to use when location permission is not granted.
    private final LatLng mDefaultLocation = new LatLng(-33.8523341, 151.2106085);
    private static final int DEFAULT_ZOOM = 15;
    private static final int PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;
    private boolean mLocationPermissionGranted;

    // The geographical location where the device is currently located. That is, the last-known
    // location retrieved by the Fused Location Provider.
    private Location mLastKnownLocation;

    // Keys for storing activity state.
    private static final String KEY_CAMERA_POSITION = "camera_position";
    private static final String KEY_LOCATION = "location";

    // Used for selecting the current place.
    private static final int M_MAX_ENTRIES = 5;
    private String[] mLikelyPlaceNames;
    private String[] mLikelyPlaceAddresses;
    private String[] mLikelyPlaceAttributions;
    private LatLng[] mLikelyPlaceLatLngs;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Retrieve location and camera position from saved instance state.
        if (savedInstanceState != null) {
            mLastKnownLocation = savedInstanceState.getParcelable(KEY_LOCATION);
            mCameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION);
        }
        setContentView(R.layout.activity_maps_current_place);
        mContext = MapsActivityCurrentPlace.this;

        // button action...
        findViewById(R.id.list_btn).setOnClickListener(this);
        findViewById(R.id.home_btn).setOnClickListener(this);

        // title set
        title = (TextView) this.findViewById(R.id.navibar_text); // title
        title.setText(getIntent().getExtras().getString("title"));

        // Construct a GeoDataClient.
        mGeoDataClient = Places.getGeoDataClient(this, null);

        // Construct a PlaceDetectionClient.
        mPlaceDetectionClient = Places.getPlaceDetectionClient(this, null);

        // Construct a FusedLocationProviderClient.
        mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);

        // Build the map.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);

    }

    /**
     * Saves the state of the map when the activity is paused.
     */
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        if (mMap != null) {
            outState.putParcelable(KEY_CAMERA_POSITION, mMap.getCameraPosition());
            outState.putParcelable(KEY_LOCATION, mLastKnownLocation);
            super.onSaveInstanceState(outState);
        }
    }

    /**
     * Manipulates the map when it's available.
     * This callback is triggered when the map is ready to be used.
     */
    @Override
    public void onMapReady(GoogleMap map) {
        mMap = map;

        // Use a custom info window adapter to handle multiple lines of text in the info window contents.
        mMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {

            @Override
            // Return null here, so that getInfoContents() is called next.
            public View getInfoWindow(Marker arg0) {
                return null;
            }

            @Override
            public View getInfoContents(Marker marker) {
                // Inflate the layouts for the info window, title and snippet.
                View infoWindow = getLayoutInflater().inflate(R.layout.custom_info_contents,
                        (FrameLayout) findViewById(R.id.map), false);

                TextView title = ((TextView) infoWindow.findViewById(R.id.title));
                title.setText(marker.getTitle());

                TextView snippet = ((TextView) infoWindow.findViewById(R.id.snippet));
                snippet.setText(marker.getSnippet());

                return infoWindow;
            }
        });

        // Prompt the user for permission.
        getLocationPermission();

        // Turn on the My Location layer and the related control on the map.
        updateLocationUI();

        // Get the current location of the device and set the position of the map.
        getDeviceLocation();
    }

    /**
     * Gets the current location of the device, and positions the map's camera.
     */
    private void getDeviceLocation() {
        /*
         * Get the best and most recent location of the device, which may be null in rare
         * cases when a location is not available.
         */
        try {
            if (mLocationPermissionGranted) {
                Task<Location> locationResult = mFusedLocationProviderClient.getLastLocation();
                locationResult.addOnCompleteListener(this, new OnCompleteListener<Location>() {
                    @Override
                    public void onComplete(@NonNull Task<Location> task) {
                        if (task.isSuccessful()) {
                            // Set the map's camera position to the current location of the device.
                            mLastKnownLocation = task.getResult();
                            mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(
                                    new LatLng(mLastKnownLocation.getLatitude(),
                                            mLastKnownLocation.getLongitude()), DEFAULT_ZOOM));
                        } else {
                            Log.d(TAG, "Current location is null. Using defaults.");
                            Log.e(TAG, "Exception: %s", task.getException());
                            mMap.moveCamera(CameraUpdateFactory
                                    .newLatLngZoom(mDefaultLocation, DEFAULT_ZOOM));
                            mMap.getUiSettings().setMyLocationButtonEnabled(false);
                        }
                    }
                });
            }
        } catch (SecurityException e)  {
            Log.e("Exception: %s", e.getMessage());
        }
    }


    /**
     * Prompts the user for permission to use the device location.
     */
    private void getLocationPermission() {
        /*
         * Request location permission, so that we can get the location of the
         * device. The result of the permission request is handled by a callback,
         * onRequestPermissionsResult.
         */
        if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
                android.Manifest.permission.ACCESS_FINE_LOCATION)
                == PackageManager.PERMISSION_GRANTED) {
            mLocationPermissionGranted = true;
        } else {
            ActivityCompat.requestPermissions(this,
                    new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
                    PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
        }
    }

    /**
     * Handles the result of the request for location permissions.
     */
    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           @NonNull String permissions[],
                                           @NonNull int[] grantResults) {
        mLocationPermissionGranted = false;
        switch (requestCode) {
            case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    mLocationPermissionGranted = true;
                }
            }
        }
        updateLocationUI();
    }

    /**
     * Prompts the user to select the current place from a list of likely places, and shows the
     * current place on the map - provided the user has granted location permission.
     */
    private void showCurrentPlace() {
        if (mMap == null) {
            return;
        }

        if (mLocationPermissionGranted) {
            // Get the likely places - that is, the businesses and other points of interest that
            // are the best match for the device's current location.
            @SuppressWarnings("MissingPermission") final
            Task<PlaceLikelihoodBufferResponse> placeResult =
                    mPlaceDetectionClient.getCurrentPlace(null);
            placeResult.addOnCompleteListener
                    (new OnCompleteListener<PlaceLikelihoodBufferResponse>() {
                        @Override
                        public void onComplete(@NonNull Task<PlaceLikelihoodBufferResponse> task) {
                            if (task.isSuccessful() && task.getResult() != null) {
                                PlaceLikelihoodBufferResponse likelyPlaces = task.getResult();

                                // Set the count, handling cases where less than 5 entries are returned.
                                int count;
                                if (likelyPlaces.getCount() < M_MAX_ENTRIES) {
                                    count = likelyPlaces.getCount();
                                } else {
                                    count = M_MAX_ENTRIES;
                                }

                                int i = 0;
                                mLikelyPlaceNames = new String[count];
                                mLikelyPlaceAddresses = new String[count];
                                mLikelyPlaceAttributions = new String[count];
                                mLikelyPlaceLatLngs = new LatLng[count];

                                for (PlaceLikelihood placeLikelihood : likelyPlaces) {
                                    // Build a list of likely places to show the user.
                                    mLikelyPlaceNames[i] = (String) placeLikelihood.getPlace().getName();
                                    mLikelyPlaceAddresses[i] = (String) placeLikelihood.getPlace()
                                            .getAddress();
                                    mLikelyPlaceAttributions[i] = (String) placeLikelihood.getPlace()
                                            .getAttributions();
                                    mLikelyPlaceLatLngs[i] = placeLikelihood.getPlace().getLatLng();

                                    i++;
                                    if (i > (count - 1)) {
                                        break;
                                    }
                                }

                                // Release the place likelihood buffer, to avoid memory leaks.
                                likelyPlaces.release();

                                // Show a dialog offering the user the list of likely places, and add a
                                // marker at the selected place.
                                openPlacesDialog();

                            } else {
                                Log.e(TAG, "Exception: %s", task.getException());
                            }
                        }
                    });
        } else {
            // The user has not granted permission.
            Log.i(TAG, "The user did not grant location permission.");

            // Add a default marker, because the user hasn't selected a place.
            mMap.addMarker(new MarkerOptions()
                    .title("기본 위치")
                    .position(mDefaultLocation)
                    .snippet("No places found, because location is disabled."));

            // Prompt the user for permission.
            getLocationPermission();
        }
    }

    /**
     * Displays a form allowing the user to select a place from a list of likely places.
     */
    private void openPlacesDialog() {
        // Ask the user to choose the place where they are now.
        DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // The "which" argument contains the position of the selected item.
                LatLng markerLatLng = mLikelyPlaceLatLngs[which];
                String markerSnippet = mLikelyPlaceAddresses[which];
                if (mLikelyPlaceAttributions[which] != null) {
                    markerSnippet = markerSnippet + "\n" + mLikelyPlaceAttributions[which];
                }

                // Add a marker for the selected place, with an info window showing information about that place.
                mMap.addMarker(new MarkerOptions()
                        .title(mLikelyPlaceNames[which])
                        .position(markerLatLng)
                        .snippet(markerSnippet));

                // Position the map's camera at the location of the marker.
                mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(markerLatLng,
                        DEFAULT_ZOOM));
            }
        };

        // Display the dialog.
        AlertDialog dialog = new AlertDialog.Builder(this)
                .setTitle("장소를 선택하세요.")
                .setItems(mLikelyPlaceNames, listener)
                .show();
    }

    /**
     * Updates the map's UI settings based on whether the user has granted location permission.
     */
    private void updateLocationUI() {
        if (mMap == null) {
            return;
        }
        try {
            if (mLocationPermissionGranted) {
                mMap.setMyLocationEnabled(true);
                mMap.getUiSettings().setMyLocationButtonEnabled(true);
            } else {
                mMap.setMyLocationEnabled(false);
                mMap.getUiSettings().setMyLocationButtonEnabled(false);
                mLastKnownLocation = null;
                getLocationPermission();
            }
        } catch (SecurityException e)  {
            Log.e("Exception: %s", e.getMessage());
        }
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.list_btn:
                // 팝업 메뉴 나오게 하는 방법
                PopupMenu popupMenu = new PopupMenu(mContext, view);
                Menu menu = popupMenu.getMenu();
                menu.add(Menu.NONE,R.id.option_get_place,Menu.NONE, "");
                //menu.add(Menu.NONE,R.id.option_get_place,Menu.NONE, "");
                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId()) {
                            case R.id.option_get_place:
                                showCurrentPlace();
                                break;
                        }
                        return true;
                    }
                });
                popupMenu.show();
                break;
            case R.id.home_btn:
                Intent intent = new Intent(MapsActivityCurrentPlace.this, MainActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
                startActivity(intent);
            default:
                break;
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.link2me.android.googlemap">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /><!-- GPS -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /><!-- WiFi or mobile -->

    <application
        android:allowBackup="false"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MapsActivityCurrentPlace"></activity>

        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="AIzaSyAgfzQZqx7nFVFhwKAhviwRP5Rmi9bmZPE" />

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'com.google.android.gms:play-services-maps:17.0.0'
    implementation 'com.google.android.gms:play-services-location:17.0.0'
    implementation 'com.google.android.gms:play-services-places:16.0.0'
    implementation 'com.google.android.libraries.places:places:2.0.0'
} 

public class Holidays implements Comparable<Holidays>{
    // ArrayList의 type이 Comparable을 implements한 경우에만 sort 메소드의 정렬 기능을 사용할 수 있다
    private String year; // 연도
    private String date; // 월일
    private String name; // 휴일 명칭

    public Holidays() {
    }

    public Holidays(String year, String date, String name) {
        this.year = year;
        this.date = date;
        this.name = name;
    }

    public String getYear() {
        return year;
    }

    public void setYear(String year) {
        this.year = year;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public int compareTo(Holidays o) {
        return this.date.compareTo(o.date);
    }
}

import com.ibm.icu.util.ChineseCalendar;
import com.tistory.link2me.item.Holidays;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collections;

public class LunarCalendar {
    static ArrayList<Holidays> holidaysArrayList = new ArrayList<>();

    /**
     * 음력날짜를 양력날짜로 변환
     * @param 음력날짜 (yyyyMMdd)
     * @return 양력날짜 (yyyyMMdd)
     */
    public static String Lunar2Solar(String yyyymmdd) {
        ChineseCalendar cc = new ChineseCalendar();
        Calendar cal = Calendar.getInstance();

        if (yyyymmdd == null)
            return "";

        String date = yyyymmdd.trim();
        if (date.length() != 8) {
            if (date.length() == 4)
                date = date + "0101";
            else if (date.length() == 6)
                date = date + "01";
            else if (date.length() > 8)
                date = date.substring(0, 8);
            else
                return "";
        }

        cc.set(ChineseCalendar.EXTENDED_YEAR, Integer.parseInt(date.substring(0, 4)) + 2637);
        cc.set(ChineseCalendar.MONTH, Integer.parseInt(date.substring(4, 6)) - 1);
        cc.set(ChineseCalendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)));

        cal.setTimeInMillis(cc.getTimeInMillis());

        int y = cal.get(Calendar.YEAR);
        int m = cal.get(Calendar.MONTH) + 1;
        int d = cal.get(Calendar.DAY_OF_MONTH);

        StringBuffer ret = new StringBuffer();
        ret.append(String.format("%04d", y));
        ret.append(String.format("%02d", m));
        ret.append(String.format("%02d", d));

        return ret.toString();
    }

    /**
     * 양력날짜를 음력날짜로 변환
     * @param 양력날짜 (yyyyMMdd)
     * @return 음력날짜 (yyyyMMdd)
     */
    public static String Solar2Lunar(String yyyymmdd) {
        ChineseCalendar cc = new ChineseCalendar();
        Calendar cal = Calendar.getInstance();

        if (yyyymmdd == null)
            return "";

        String date = yyyymmdd.trim() ;
        if( date.length() != 8 ) {
            if( date.length() == 4 )
                date = date + "0101" ;
            else if( date.length() == 6 )
                date = date + "01" ;
            else if( date.length() > 8 )
                date = date.substring(0,8) ;
            else
                return "" ;
        }

        cal.set( Calendar.YEAR, Integer.parseInt(date.substring(0,4)) ) ;
        cal.set( Calendar.MONTH, Integer.parseInt(date.substring(4,6))-1 ) ;
        cal.set( Calendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)) ) ;

        cc.setTimeInMillis( cal.getTimeInMillis() ) ;

        // ChinessCalendar.YEAR 는 1~60 까지의 값만 가지고 ,
        // ChinessCalendar.EXTENDED_YEAR 는 Calendar.YEAR 값과 2637 만큼의 차이를 가진다.
        int y = cc.get(ChineseCalendar.EXTENDED_YEAR)-2637 ;
        int m = cc.get(ChineseCalendar.MONTH)+1 ;
        int d = cc.get(ChineseCalendar.DAY_OF_MONTH) ;

        StringBuffer ret = new StringBuffer() ;
        if( y < 1000 )          ret.append( "0" ) ;
        else if( y < 100 )      ret.append( "00" ) ;
        else if( y < 10 )       ret.append( "000" ) ;
        ret.append( y ) ;

        if( m < 10 ) ret.append( "0" ) ;
        ret.append( m ) ;

        if( d < 10 ) ret.append( "0" ) ;
        ret.append( d ) ;

        return ret.toString() ;
    }


    public static ArrayList<Holidays> holidayArray(String yyyy){
        holidaysArrayList.clear(); // 데이터 초기화
        // 양력 휴일
        addHolidaysItem(yyyy,"0101" ,"신정");
        addHolidaysItem(yyyy,"0301" ,"삼일절");
        addHolidaysItem(yyyy,"0505" ,"어린이날");
        addHolidaysItem(yyyy,"0606" ,"현충일" );
        addHolidaysItem(yyyy,"0815" ,"광복절");
        addHolidaysItem(yyyy,"1003" ,"개천절");
        addHolidaysItem(yyyy,"1009" ,"한글날");
        addHolidaysItem(yyyy,"1225" ,"성탄절");

        // 음력 휴일
        String prev_seol = String.valueOf(Integer.parseInt(Lunar2Solar(yyyy+"0101")) -1);
        addHolidaysItem(yyyy,prev_seol.substring(4) ,"");
        addHolidaysItem(yyyy,SolarDays(yyyy, "0101"),"설날");
        addHolidaysItem(yyyy,SolarDays(yyyy, "0102"),"");
        addHolidaysItem(yyyy,SolarDays(yyyy, "0408"),"석탄일");
        addHolidaysItem(yyyy,SolarDays(yyyy, "0814"),"");
        addHolidaysItem(yyyy,SolarDays(yyyy, "0815"),"추석");
        addHolidaysItem(yyyy,SolarDays(yyyy, "0816"),"");

        try {
            // 어린이날 대체공휴일 검사 : 어린이날은 토요일, 일요일인 경우 그 다음 평일을 대체공유일로 지정
            int childDayChk = WeekendValue(yyyy+"0505");
            if(childDayChk == 1) addHolidaysItem(yyyy,"0506" ,"대체공휴일");
            if(childDayChk == 7) addHolidaysItem(yyyy,"0507" ,"대체공휴일");

            // 설날 대체공휴일 검사
            if(WeekendValue(Lunar2Solar(yyyy+"0101"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0103"),"대체공휴일");
            if(WeekendValue(Lunar2Solar(yyyy+"0101"))==2) addHolidaysItem(yyyy,SolarDays(yyyy, "0103"),"대체공휴일");
            if(WeekendValue(Lunar2Solar(yyyy+"0102"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0103"),"대체공휴일");

            // 추석 대체공휴일 검사
            if(WeekendValue(Lunar2Solar(yyyy+"0814"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0817"),"대체공휴일");
            if(WeekendValue(Lunar2Solar(yyyy+"0815"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0817"),"대체공휴일");
            if(WeekendValue(Lunar2Solar(yyyy+"0816"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0817"),"대체공휴일");
        } catch (ParseException e) {
            e.printStackTrace();
        }

        Collections.sort(holidaysArrayList); // 오름차순 정렬

        return holidaysArrayList;
    }

    private static String SolarDays(String yyyy, String date){
        return Lunar2Solar(yyyy+date).substring(4);
    }

    private static void addHolidaysItem(String year, String date, String name ){
        Holidays item = new Holidays();
        item.setYear(year);
        item.setDate(date);
        item.setName(name);
        holidaysArrayList.add(item);
    }

    private static int WeekendValue(String date) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
        Calendar cal = Calendar.getInstance();
        cal.setTime(sdf.parse(date));
        return cal.get(Calendar.DAY_OF_WEEK);
        // Calendar.SUNDAY : 1
        // Calendar.SATURDAY : 7
    }

}

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.tistory.link2me.item.Holidays;
import com.tistory.link2me.util.Lunar2Solar;
import com.tistory.link2me.util.LunarCalendar;

import java.util.ArrayList;
import java.util.Calendar;

public class CalendarActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_calendar);

        System.out.println("Calendar.SUNDAY : "+Calendar.SUNDAY);
        System.out.println("Calendar.SATURDAY : "+Calendar.SATURDAY);

        ArrayList<Holidays> arr = LunarCalendar.holidayArray("2019");
        for(int i=0; i < arr.size();i++){
            System.out.println(arr.get(i).getYear() +"년 " + arr.get(i).getDate() +", " + arr.get(i).getName() );
        }

    }
}

[ 태음력의 조정 ]
    235회합월은 일수로는 6940일(days)이다(235 x 29.530588일 = 6939.68818일).
    6940일의 1/19은 6940일 / 19 = 365.263157894737일(365 + 1/4 + 1/76일)이다.
    365.263157894737일은 12회합월(synodic months)인
    12 x 29.530588일 = 354.367056일보다 10.896101894737일(365.263157894737 - 354.367056) 더 크다.
    이것이 뜻하는 바는 음력으로 1년이 지나면 태양력과는 약 11일의 차이가 난다는 것을 의미한다.
    따라서 음력으로 3년이 지나면 태양력과는 약 33일의 차이가 나게 된다.
    따라서 3년마다 음력에 1달을 추가하며 13개의 음력 달들이 있게 하면,
    태음력은 어느 정도 근사하게 태양력과 일치하게 된다.
    태양력 19년 동안에 이런 작업을 총 7번(19년/3년 = 6.33) 행하면 된다.
    이런 이유로, 메톤 주기를 19년 7윤법이라고도 하였다.
 
메톤은 19태양년을 6,940일로 보고,
이것을 큰달(30일) 125개월과 작은달(29일) 110개월의 총 235개월 6,940일로 배분하였다.
이 방법은 평년(12개월) 12년과 윤년(13개월) 7년의 총 235개월로
태음력 달력을 구성하는 것과 동일하므로 19년 7윤법이라고도 하였다.

메톤주기의 존재를 알 수 있는 예로,
특정한 양력 날짜와 그에 대응하는 음력 날짜는 19년이 지나면 다시 일치한다는 사실을 찾을 수 있다.

하지만 정확히 맞물리는 건 아니라서 하루 정도 어긋나기도 한다. 

public class Lunar2Solar {
    // 음력 데이터 (평달 - 작은달 :1,  큰달:2 )
    // (윤달이 있는 달 - 평달이 작고 윤달도 작으면 :3 , 평달이 작고 윤달이 크면 : 4)
    // (윤달이 있는 달 - 평달이 크고 윤달이 작으면 :5,  평달과 윤달이 모두 크면 : 6)
    final static String[] LunarInfo = new String[]
            {"1212122322121","1212121221220","1121121222120","2112132122122","2112112121220",
                "2121211212120","2212321121212","2122121121210","2122121212120","1232122121212",
                "1212121221220","1121123221222","1121121212220","1212112121220","2121231212121",
                "2221211212120","1221212121210","2123221212121","2121212212120","1211212232212",
                "1211212122210","2121121212220","1212132112212","2212112112210","2212211212120",
                "1221412121212","1212122121210","2112212122120","1231212122212","1211212122210",
                "2121123122122","2121121122120","2212112112120","2212231212112","2122121212120",
                "1212122121210","2132122122121","2112121222120","1211212322122","1211211221220",
                "2121121121220","2122132112122","1221212121120","2121221212110","2122321221212",
                "1121212212210","2112121221220","1231211221222","1211211212220","1221123121221",
                "2221121121210","2221212112120","1221241212112","1212212212120","1121212212210",
                "2114121212221","2112112122210","2211211412212","2211211212120","2212121121210",
                "2212214112121","2122122121120","1212122122120","1121412122122","1121121222120",
                "2112112122120","2231211212122","2121211212120","2212121321212","2122121121210",
                "2122121212120","1212142121212","1211221221220","1121121221220","2114112121222",
                "1212112121220","2121211232122","1221211212120","1221212121210","2121223212121",
                "2121212212120","1211212212210","2121321212221","2121121212220","1212112112210",
                "2223211211221","2212211212120","1221212321212","1212122121210","2112212122120",
                "1211232122212","1211212122210","2121121122210","2212312112212","2212112112120",
                "2212121232112","2122121212110","2212122121210","2112124122121","2112121221220",
                "1211211221220","2121321122122","2121121121220","2122112112322","1221212112120",
                "1221221212110","2122123221212","1121212212210","2112121221220","1211231212222",
                "1211211212220","1221121121220","1223212112121","2221212112120","1221221232112",
                "1212212122120","1121212212210","2112132212221","2112112122210","2211211212210",
                "2221321121212","2212121121210","2212212112120","1232212122112","1212122122110",
                "2121212322122","1121121222120","2112112122120","2211231212122","2121211212120",
                "2122121121210","2124212112121","2122121212120","1212121223212","1211212221220",
                "1121121221220","2112132121222","1212112121220","2121211212120","2122321121212",
                "1221212121210","2121221212120","1232121221212","1211212212210","2121123212221",
                "2121121212220","1212112112220","1221231211221","2212211211220","1212212121210",
                "2123212212121","2112122122120","1211212322212","1211212122210","2121121122120",
                "2212114112122","2212112112120","2212121211210","2212232121211","2122122121210",
                "2112122122120","1231212122212","1211211221220","2121121321222","2121121121220",
                "2122112112120","2122141211212","1221221212110","2121221221210","2114121221221"};

    final static int[] arrayLDAY = new int[]{31,0,31,30,31,30,31,31,30,31,30,31};

    public static String lun2sol(String yyyymmdd) {
        int YunMonthFlag = 0;
        int gf_lun2sol = 0;
        int gf_yun = 0;
        int leap = 0;
        int syear = 0;
        int smonth = 0;
        int sday = 0;

        int getYEAR = Integer.parseInt(yyyymmdd.substring(0,4));
        int getMONTH = Integer.parseInt(yyyymmdd.substring(4,6));
        int getDAY = Integer.parseInt(yyyymmdd.substring(6,8));

        String arrayYUKSTR="甲-乙-丙-丁-戊-己-庚-辛-壬-癸";
        String[] arrayYUK = arrayYUKSTR.split("-");

        String arrayGAPSTR="子-丑-寅-卯-辰-巳-午-未-申-酉-戌-亥";
        String[] arrayGAP = arrayGAPSTR.split("-");

        String arrayDDISTR="쥐-소-범-토끼-용-뱀-말-양-원숭이-닭-개-돼지";
        String[] arrayDDI = arrayDDISTR.split("-");

        String arrayWEEKSTR="일-월-화-수-목-금-토";
        String[] arrayWEEK = arrayWEEKSTR.split("-");

        if (getYEAR <= 1881 || getYEAR >= 2050) { //년수가 해당일자를 넘는 경우
            YunMonthFlag = 0;
        }

        if (getMONTH > 12) { // 달수가 13이 넘는 경우
            YunMonthFlag = 0;
        }

        int m1 = getYEAR - 1881;
        if (Integer.parseInt(LunarInfo[m1].substring(12,13)) == 0) { // 윤달이 없는 해임
            YunMonthFlag = 0;
        } else {
            if (Integer.parseInt(LunarInfo[m1].substring(getMONTH,getMONTH+1)) > 2) {
                YunMonthFlag = 1;
            } else {
                YunMonthFlag = 0;
            }
        }

        m1 = -1;
        int td = 0;

        if (getYEAR > 1881 && getYEAR < 2050) {
            m1 = getYEAR - 1882;
            for (int i=0; i <= m1; i++) {
                for (int j=0; j <= 12; j++) {
                    td = td + Integer.parseInt(LunarInfo[i].substring(j,j+1));
                }
                if (Integer.parseInt(LunarInfo[i].substring(12,13)) == 0) {
                    td = td + 336;
                } else {
                    td = td + 362;
                }
            }
        } else {
            gf_lun2sol = 0;
        }

        m1++;
        int n2 = getMONTH - 1;
        int m2 = -1;

        while(true) {
            m2++;
            if (Integer.parseInt(LunarInfo[m1].substring(m2,m2+1)) > 2) {
                td = td + 26 + Integer.parseInt(LunarInfo[m1].substring(m2,m2+1));
                n2++;
            } else {
                if (m2 == n2) {
                    if (gf_yun == 1) {
                        td = td + 28 + Integer.parseInt(LunarInfo[m1].substring(m2,m2+1));
                    }
                    break;
                } else {
                    td = td + 28 + Integer.parseInt(LunarInfo[m1].substring(m2,m2+1));
                }
            }
        }

        td = td + getDAY + 29;
        m1 = 1880;
        while(true) {
            m1++;
            if (m1 % 400 == 0 || m1 % 100 != 0 && m1 % 4 == 0) {
                leap = 1;
            } else {
                leap = 0;
            }

            if (leap == 1) {
                m2 = 366;
            } else {
                m2 = 365;
            }

            if (td < m2) break;
            td = td - m2;
        }
        syear = m1;
        arrayLDAY[1] = m2 - 337;

        m1 = 0;

        while(true) {
            m1++;
            if (td <= arrayLDAY[m1-1]) {
                break;
            }
            td = td - arrayLDAY[m1-1];
        }
        smonth = m1;
        sday = td;
        int y = syear - 1;
        td = (int)(y*365) + (int)(y/4) - (int)(y/100) + (int)(y/400);

        if (syear % 400 == 0 || syear % 100 != 0 && syear % 4 == 0) {
            leap = 1;
        } else {
            leap = 0;
        }

        if (leap == 1) {
            arrayLDAY[1] = 29;
        } else {
            arrayLDAY[1] = 28;
        }
        for (int i=0; i <= smonth-2; i++) {
            td = td + arrayLDAY[i];
        }
        td = td + sday;
        int w = td % 7;

        String sweek = arrayWEEK[w];
        gf_lun2sol = 1;

        return String.valueOf(syear+String.format("%02d", smonth)+String.format("%02d", sday));
    }

    public static String sol2lun(String yyyymmdd) {
        int gf_sol2lun = 0;
        int gf_yun = 0;

        int getYEAR = Integer.parseInt(yyyymmdd.substring(0,4));
        int getMONTH = Integer.parseInt(yyyymmdd.substring(4,6));
        int getDAY = Integer.parseInt(yyyymmdd.substring(6,8));

        String arrayYUKSTR="甲-乙-丙-丁-戊-己-庚-辛-壬-癸";
        String[] arrayYUK = arrayYUKSTR.split("-");

        String arrayGAPSTR="子-丑-寅-卯-辰-巳-午-未-申-酉-戌-亥";
        String[] arrayGAP = arrayGAPSTR.split("-");

        String arrayDDISTR="쥐-소-범-토끼-용-뱀-말-양-원숭이-닭-개-돼지";
        String[] arrayDDI = arrayDDISTR.split("-");

        String arrayWEEKSTR="일-월-화-수-목-금-토";
        String[] arrayWEEK = arrayWEEKSTR.split("-");


        Long[] dt = new Long[LunarInfo.length];
        for (int i = 0; i < LunarInfo.length; i++) {
            dt[i] = Long.parseLong(LunarInfo[i]);
        }
        for (int i=0; i <= 168; i++) {
            dt[i] = Long.valueOf(0);
            for (int j=0;j < 12;j++) {
                switch (Integer.parseInt(LunarInfo[i].substring(j,j+1))) {
                    case 1:
                        dt[i] += 29;
                        break;
                    case 3:
                        dt[i] += 29;
                        break;
                    case 2:
                        dt[i] += 30;
                        break;
                    case 4:
                        dt[i] += 30;
                        break;
                }
            }

            switch (Integer.parseInt(LunarInfo[i].substring(12,13))) {
                case 0:
                    break;
                case 1:
                    dt[i] += 29;
                    break;
                case 3:
                    dt[i] += 29;
                    break;
                case 2:
                    dt[i] += 30;
                    break;
                case 4:
                    dt[i] += 30;
                    break;
            }
        }

        int td1 = 1880 * 365 + (int)(1880/4) - (int)(1880/100) + (int)(1880/400) + 30;
        int k11 = getYEAR - 1;

        int td2 = k11 * 365 + (int)(k11/4) - (int)(k11/100) + (int)(k11/400);

        if (getYEAR % 400 == 0 || getYEAR % 100 != 0 && getYEAR % 4 == 0) {
            arrayLDAY[1] = 29;
        } else {
            arrayLDAY[1] = 28;
        }

        if (getMONTH > 13) {
            gf_sol2lun = 0;
        }

        if (getDAY > arrayLDAY[getMONTH-1]) {
            gf_sol2lun = 0;
        }

        for (int i=0;i <= getMONTH-2;i++) {
            td2 += arrayLDAY[i];
        }

        td2 += getDAY;
        int td = td2 - td1 + 1;
        Long td0 = dt[0];

        int jcount = 0;
        int ryear = 0;
        int m1 = 0;
        int m2 = 0;
        int i = 0;
        for (i=0; i <= 168; i++) {
            if (td <= td0) {
                break;
            }
            td0 += dt[i + 1];
        }
        ryear = i + 1881;
        td0 -= dt[i];
        td -= td0;

        if (Integer.parseInt(LunarInfo[i].substring(12,13)) == 0) {
            jcount = 11;
        } else {
            jcount = 12;
        }

        for (int j=0;j <= jcount;j++) { // 달수 check, 윤달 > 2 (by harcoon)
            if (Integer.parseInt(LunarInfo[i].substring(j,j+1)) <= 2) {
                m2++;
                m1 = Integer.parseInt(LunarInfo[i].substring(j,j+1)) + 28;
                gf_yun = 0;
            } else {
                m1 = Integer.parseInt(LunarInfo[i].substring(j,j+1)) + 26;
                gf_yun = 1;
            }
            if (td <= m1) {
                break;
            }
            td = td - m1;
        }

        int k1=(ryear+6) % 10;
        String syuk = arrayYUK[k1];
        int k2=(ryear+8) % 12;
        String sgap = arrayGAP[k2];
        String sddi = arrayDDI[k2];

        gf_sol2lun = 1;

        return String.valueOf(ryear+String.format("%02d", m2)+String.format("%02d", td)+"|"+syuk+sgap+"년|"+sddi+"띠");
    }

}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'androidx.recyclerview:recyclerview:1.0.0'
    implementation 'androidx.cardview:cardview:1.0.0'
    implementation 'gun0912.ted:tedpermission:2.0.0'
    implementation 'com.github.bumptech.glide:glide:3.8.0' // 이미지 라이브러리
    implementation files('libs/icu4j-4_8_2.jar')
}

import com.ibm.icu.util.ChineseCalendar;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Calendar;

public class LunarCalendar {
    /**
     * 음력날짜를 양력날짜로 변환
     * @param 음력날짜 (yyyyMMdd)
     * @return 양력날짜 (yyyyMMdd)
     */
    public static String Lunar2Solar(String yyyymmdd) {
        ChineseCalendar cc = new ChineseCalendar();
        Calendar cal = Calendar.getInstance();

        if (yyyymmdd == null)
            return "";

        String date = yyyymmdd.trim();
        if (date.length() != 8) {
            if (date.length() == 4)
                date = date + "0101";
            else if (date.length() == 6)
                date = date + "01";
            else if (date.length() > 8)
                date = date.substring(0, 8);
            else
                return "";
        }

        cc.set(ChineseCalendar.EXTENDED_YEAR, Integer.parseInt(date.substring(0, 4)) + 2637);
        cc.set(ChineseCalendar.MONTH, Integer.parseInt(date.substring(4, 6)) - 1);
        cc.set(ChineseCalendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)));

        cal.setTimeInMillis(cc.getTimeInMillis());

        int y = cal.get(Calendar.YEAR);
        int m = cal.get(Calendar.MONTH) + 1;
        int d = cal.get(Calendar.DAY_OF_MONTH);

        StringBuffer ret = new StringBuffer();
        ret.append(String.format("%04d", y));
        ret.append(String.format("%02d", m));
        ret.append(String.format("%02d", d));

        return ret.toString();
    }

    /**
     * 양력날짜를 음력날짜로 변환
     * @param 양력날짜 (yyyyMMdd)
     * @return 음력날짜 (yyyyMMdd)
     */
    public static String Solar2Lunar(String yyyymmdd) {
        ChineseCalendar cc = new ChineseCalendar();
        Calendar cal = Calendar.getInstance();

        if (yyyymmdd == null)
            return "";

        String date = yyyymmdd.trim() ;
        if( date.length() != 8 ) {
            if( date.length() == 4 )
                date = date + "0101" ;
            else if( date.length() == 6 )
                date = date + "01" ;
            else if( date.length() > 8 )
                date = date.substring(0,8) ;
            else
                return "" ;
        }

        cal.set( Calendar.YEAR, Integer.parseInt(date.substring(0,4)) ) ;
        cal.set( Calendar.MONTH, Integer.parseInt(date.substring(4,6))-1 ) ;
        cal.set( Calendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)) ) ;

        cc.setTimeInMillis( cal.getTimeInMillis() ) ;

        // ChinessCalendar.YEAR 는 1~60 까지의 값만 가지고 ,
        // ChinessCalendar.EXTENDED_YEAR 는 Calendar.YEAR 값과 2637 만큼의 차이를 가진다.
        int y = cc.get(ChineseCalendar.EXTENDED_YEAR)-2637 ;
        int m = cc.get(ChineseCalendar.MONTH)+1 ;
        int d = cc.get(ChineseCalendar.DAY_OF_MONTH) ;

        StringBuffer ret = new StringBuffer() ;
        if( y < 1000 )          ret.append( "0" ) ;
        else if( y < 100 )      ret.append( "00" ) ;
        else if( y < 10 )       ret.append( "000" ) ;
        ret.append( y ) ;

        if( m < 10 ) ret.append( "0" ) ;
        ret.append( m ) ;

        if( d < 10 ) ret.append( "0" ) ;
        ret.append( d ) ;

        return ret.toString() ;
    }
}

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.tistory.link2me.util.LunarCalendar;
import java.util.Calendar;

public class CalendarActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_calendar);

        System.out.println( LunarCalendar.Solar2Lunar("20010715") ) ; // 양력을 음력으로 바꾸기
        System.out.println( LunarCalendar.Lunar2Solar("20010527") ) ; // 음력을 양력으로 바꾸기
    }

} 

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

public class Ca03 {
    private int year;
    private int month;
    private int day;
    private boolean leap;
    final static String chineseNumber[] = { "1", "2", "3", "4", "5", "6", "7","8", "9", "10", "11", "12" };
    static SimpleDateFormat chineseDateFormat = new SimpleDateFormat("yyyy年MM月dd日");
    final static long[] lunarInfo = new long[] { 0x04bd8, 0x04ae0, 0x0a570,
            0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,
            0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0,
            0x0ada2, 0x095b0, 0x14977, 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50,
            0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566,
            0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0,
            0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4,
            0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0, 0x0b550,
            0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950,
            0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260,
            0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0,
            0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,
            0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40,
            0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0, 0x074a3,
            0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960,
            0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0,
            0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9,
            0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954, 0x06aa0,
            0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65,
            0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0,
            0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0, 0x055b2,
            0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0 };

    // ====== 传回农历 y年的总天数
    final private static int yearDays(int y) {
        int i, sum = 348;
        for (i = 0x8000; i > 0x8; i >>= 1) {
            if ((lunarInfo[y - 1900] & i) != 0)
                sum += 1;
        }
        return (sum + leapDays(y));
    }

    // ====== 传回农历 y年闰月的天数
    final private static int leapDays(int y) {
        if (leapMonth(y) != 0) {
            if ((lunarInfo[y - 1900] & 0x10000) != 0)
                return 30;
            else
                return 29;
        } else
            return 0;
    }

    // ====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
    final private static int leapMonth(int y) {
        return (int) (lunarInfo[y - 1900] & 0xf);
    }

    // ====== 传回农历 y年m月的总天数
    final private static int monthDays(int y, int m) {
        if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
            return 29;
        else
            return 30;
    }

    // ====== 传回农历 y年的生肖
    final public String animalsYear() {
        final String[] Animals = new String[] { "쥐", "소", "호랑이", "토끼", "용", "뱀", "말", "양", "원숭이", "닭", "개", "돼지"};
        return Animals[(year - 4) % 12];
    }

    // ====== 传入 月日的offset 传回干支, 0=甲子
    final private static String cyclicalm(int num) {
        final String[] Gan = new String[] { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
        final String[] Zhi = new String[] { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };
        return (Gan[num % 10] + Zhi[num % 12]);
    }

    // ====== 传入 offset 传回干支, 0=甲子
    final public String cyclical() {
        int num = year - 1900 + 36;
        return (cyclicalm(num));
    }

    public Ca03(Calendar cal) {
        int yearCyl, monCyl, dayCyl;
        int leapMonth = 0;
        Date baseDate = null;
        try {
            baseDate = chineseDateFormat.parse("1900年1月31日");
        } catch (ParseException e) {
            e.printStackTrace(); // To change body of catch statement use
                                    // Options | File Templates.
        }

        // 求出和1900年1月31日相差的天数
        int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);
        dayCyl = offset + 40;
        monCyl = 14;

        // 用offset减去每农历年的天数
        // 计算当天是农历第几天
        // i最终结果是农历的年份
        // offset是当年的第几天
        int iYear, daysOfYear = 0;
        for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
            daysOfYear = yearDays(iYear);
            offset -= daysOfYear;
            monCyl += 12;
        }
        if (offset < 0) {
            offset += daysOfYear;
            iYear--;
            monCyl -= 12;
        }
        // 农历年份
        year = iYear;

        yearCyl = iYear - 1864;
        leapMonth = leapMonth(iYear); // 闰哪个月,1-12
        leap = false;

        // 用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天
        int iMonth, daysOfMonth = 0;
        for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {
            // 闰月
            if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {
                --iMonth;
                leap = true;
                daysOfMonth = leapDays(year);
            } else
                daysOfMonth = monthDays(year, iMonth);

            offset -= daysOfMonth;
            // 解除闰月
            if (leap && iMonth == (leapMonth + 1))
                leap = false;
            if (!leap)
                monCyl++;
        }
        // offset为0时，并且刚才计算的月份是闰月，要校正
        if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
            if (leap) {
                leap = false;
            } else {
                leap = true;
                --iMonth;
                --monCyl;
            }
        }
        // offset小于0时，也要校正
        if (offset < 0) {
            offset += daysOfMonth;
            --iMonth;
            --monCyl;
        }
        month = iMonth;
        day = offset + 1;
    }

    public static String getChinaDayString(int day) {
        String chineseTen[] = { "初", "十", "廿", "卅" };
        int n = day % 10 == 0 ? 9 : day % 10 - 1;
        if (day > 30)
            return "";
        if (day == 10)
            return "初十";
        else
            return chineseTen[day / 10] + chineseNumber[n];
    }

    public String toString() {
        return year + "年 " + (leap ? "闰" : "") + chineseNumber[month - 1] + "月 " + day +"日";
    }
   
    public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
        cal.setTimeZone(TimeZone.getDefault());
        System.out.println("양력(오늘):" + sdf.format(cal.getTime()));
       
        int year = 2001;
        int month = 1;
        int date = 25;
        cal.set(year, month-1, date);

        Ca03 lunar = new Ca03(cal);
        System.out.print("음력(오늘):");
        System.out.print(lunar.year + "年 ");
        System.out.print(lunar.month + "月 ");
        System.out.print(lunar.day+"日");

        System.out.println("\n*************\n" + lunar.animalsYear());
        System.out.println(lunar.cyclical());
        System.out.println(lunar);
    }

}