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증감 추이를 파악하기 위해 샘플로 작성한 LineChart 예제이다.
앱 build.gradle
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-android-extensions'
id 'kotlin-kapt'
}
android {
compileSdkVersion 30
defaultConfig {
applicationId "com.link2me.android.mpchartdemo"
minSdkVersion 23
targetSdkVersion 30
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
implementation 'androidx.core:core-ktx:1.5.0'
implementation 'androidx.appcompat:appcompat:1.3.0'
implementation 'com.google.android.material:material:1.3.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
//implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0'
implementation 'com.github.PhilJay:MPAndroidChart:v2.2.5'
}
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XML 파일
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivitySample">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
tools:ignore="MissingConstraints">
<com.github.mikephil.charting.charts.LineChart
android:id="@+id/linechart"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
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MainActivity.kt 파일
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.github.mikephil.charting.charts.LineChart
import com.github.mikephil.charting.components.YAxis
import com.github.mikephil.charting.data.Entry
import com.github.mikephil.charting.data.LineData
import com.github.mikephil.charting.data.LineDataSet
import com.github.mikephil.charting.interfaces.datasets.ILineDataSet
import com.github.mikephil.charting.utils.ColorTemplate
import java.util.*
class MainActivity : AppCompatActivity() {
private val TAG = this.javaClass.simpleName
lateinit var lineChart: LineChart
private val chartData = ArrayList<ChartData>()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
chartData.clear()
addChartItem("1월", 7.9)
addChartItem("2월", 8.2)
addChartItem("3월", 8.3)
addChartItem("4월", 8.5)
addChartItem("5월", 7.3)
LineChartGraph(chartData, "강남")
}
private fun addChartItem(lableitem: String, dataitem: Double) {
val item = ChartData()
item.lableData = lableitem
item.valData = dataitem
chartData.add(item)
}
private fun LineChartGraph(chartItem: ArrayList<ChartData>, displayname: String) {
lineChart = findViewById(R.id.linechart)
val entries = ArrayList<Entry>()
for (i in chartItem.indices) {
entries.add(Entry(chartItem[i].valData.toFloat(), i))
}
val depenses = LineDataSet(entries, displayname)
depenses.axisDependency = YAxis.AxisDependency.LEFT
depenses.valueTextSize = 12f // 값 폰트 지정하여 크게 보이게 하기
depenses.setColors(ColorTemplate.COLORFUL_COLORS) //
//depenses.setDrawCubic(true); //선 둥글게 만들기
depenses.setDrawFilled(false) //그래프 밑부분 색칠
val labels = ArrayList<String>()
for (i in chartItem.indices) {
labels.add(chartItem[i].lableData)
}
val dataSets = ArrayList<ILineDataSet>()
dataSets.add(depenses as ILineDataSet)
val data = LineData(labels, dataSets) // 라이브러리 v3.x 사용하면 에러 발생함
lineChart.data = data
//lineChart.animateXY(1000,1000);
lineChart.invalidate()
}
}
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data class ChartData(
var lableData: String = "",
var valData: Double = 0.0
)
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