[JAVA][Android] 원형 그래프 만들기

이번 예제는 MPAndroidChart 라이브러리를 사용해서 원형 그래프를 만들어보겠습니다.

 

MPAndroidChart 란?

안드로이드 차트 기능을 제공하는 라이브러리 입니다.

 

[참고]

github.com/PhilJay/MPAndroidChart

---

build.gradle

allprojects {
    repositories {
        google()
        mavenCentral()
        jcenter() // Warning: this repository is going to shut down soon

        maven { url "https://jitpack.io" } // MPAndroidChart 의존 추가
    }
}

// build.gradle(Project:프로젝트명)

 

 

dependencies {
    compile 'com.github.PhilJay:MpAndroidChart:v3.0.2'
}
// build.gradle(Module:프로젝트명)

 

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="org.androidtown.graph.MainActivity">

    <com.github.mikephil.charting.charts.PieChart
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/piechart">

    </com.github.mikephil.charting.charts.PieChart>

</RelativeLayout>

 

Java

package com.example.graph;


import android.graphics.Color;
import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

import com.github.mikephil.charting.animation.Easing;
import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.components.Description;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.data.PieEntry;
import com.github.mikephil.charting.utils.ColorTemplate;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    PieChart pieChart;

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

        pieChart = (PieChart)findViewById(R.id.piechart);

        pieChart.setUsePercentValues(true);
        pieChart.getDescription().setEnabled(false);
        pieChart.setExtraOffsets(5,10,5,5);

        pieChart.setDragDecelerationFrictionCoef(0.95f);

        pieChart.setDrawHoleEnabled(false);
        pieChart.setHoleColor(Color.WHITE);
        pieChart.setTransparentCircleRadius(61f);

        ArrayList<PieEntry> yValues = new ArrayList<PieEntry>();

        yValues.add(new PieEntry(34f,"한식"));
        yValues.add(new PieEntry(23f,"중식"));
        yValues.add(new PieEntry(14f,"일식"));
        yValues.add(new PieEntry(35f,"양식"));
        yValues.add(new PieEntry(40f,"동남아"));
        yValues.add(new PieEntry(40f,"기타"));

        Description description = new Description();
        description.setText("세계 요리"); //라벨
        description.setTextSize(15);
        pieChart.setDescription(description);

        pieChart.animateY(1000, Easing.EasingOption.EaseInOutCubic); //애니메이션

        PieDataSet dataSet = new PieDataSet(yValues,"음식 종류");
        dataSet.setSliceSpace(3f);
        dataSet.setSelectionShift(5f);
        dataSet.setColors(ColorTemplate.JOYFUL_COLORS);

        PieData data = new PieData((dataSet));
        data.setValueTextSize(10f);
        data.setValueTextColor(Color.YELLOW);

		//pieChart.invalidate(); // 회전 및 터치 효과 사라짐
        //pieChart.setTouchEnabled(false);

        pieChart.setData(data);
    }
}

 

제작된 원형 그래프