android開源圖表庫MPAndroidChart（曲線圖、直方圖、餅狀圖）

github地址：https://github.com/PhilJay/MPAndroidChart

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添加依賴：

• Add the following to your project level build.gradle:

allprojects {
	repositories {
		maven { url "https://jitpack.io" } } }

• Add this to your app build.gradle:

dependencies {
	compile 'com.github.PhilJay:MPAndroidChart:v3.0.2' }

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下載Demo演示，修改爲本身的需求便可
如餅圖的示例代碼：

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.DisplayMetrics;

import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.components.Description;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.data.PieEntry;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private PieChart mChart;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mChart = (PieChart) findViewById(R.id.pieChart);
        PieData mPieData = getPieData(4, 100);
        showChart(mChart, mPieData);
    }

    private void showChart(PieChart pieChart, PieData pieData) {
        pieChart.setHoleColor(Color.TRANSPARENT);
        pieChart.setHoleRadius(60f);  //半徑
        pieChart.setTransparentCircleRadius(64f); // 半透明圈
        //pieChart.setHoleRadius(0)  //實心圓
        Description description = new Description();
        description.setText("測試餅狀圖");
        pieChart.setDescription(description);
        // mChart.setDrawYValues(true);
        pieChart.setDrawCenterText(true);  //餅狀圖中間能夠添加文字
        pieChart.setDrawHoleEnabled(true);
        pieChart.setRotationAngle(90); // 初始旋轉角度
        pieChart.setRotationEnabled(true); // 能夠手動旋轉
        pieChart.setUsePercentValues(true);  //顯示成百分比
        pieChart.setCenterText("測試");  //餅狀圖中間的文字
        pieChart.setCenterTextSize(18);
        //設置數據
        pieChart.setData(pieData);
        Legend mLegend = pieChart.getLegend();  //設置比例圖
        mLegend.setPosition(Legend.LegendPosition.RIGHT_OF_CHART);  //最右邊顯示
        //      mLegend.setForm(LegendForm.LINE);  //設置比例圖的形狀，默認是方形
        mLegend.setXEntrySpace(7f);
        mLegend.setYEntrySpace(5f);
        pieChart.animateXY(1000, 1000);  //設置動畫
    }

    /**
     *
     * @param count 分紅幾部分
     * @param range
     */
    private PieData getPieData(int count, float range) {
        ArrayList<String> xValues = new ArrayList<String>();  //xVals用來表示每一個餅塊上的內容
        for (int i = 0; i < count; i++) {
            xValues.add("Quarterly" + (i + 1));  //餅塊上顯示成Quarterly1, Quarterly2, Quarterly3, Quarterly4
        }

        ArrayList<PieEntry> yValues = new ArrayList();  //yVals用來表示封裝每一個餅塊的實際數據
        // 餅圖數據
        /**
         * 將一個餅形圖分紅四部分， 四部分的數值比例爲14:14:34:38
         * 因此 14表明的百分比就是14%
         */
        float quarterly1 = 14;
        float quarterly2 = 14;
        float quarterly3 = 34;
        float quarterly4 = 38;
        yValues.add(new PieEntry(quarterly1, 0));
        yValues.add(new PieEntry(quarterly2, 1));
        yValues.add(new PieEntry(quarterly3, 2));
        yValues.add(new PieEntry(quarterly4, 3));
        //y軸的集合
        PieDataSet pieDataSet = new PieDataSet(yValues, "Quarterly Revenue 2014"/*顯示在比例圖上*/);
        pieDataSet.setSliceSpace(0f); //設置個餅狀圖之間的距離
        ArrayList<Integer> colors = new ArrayList<Integer>();
        // 餅圖顏色
        colors.add(Color.rgb(205, 205, 205));
        colors.add(Color.rgb(114, 188, 223));
        colors.add(Color.rgb(255, 123, 124));
        colors.add(Color.rgb(57, 135, 200));
        pieDataSet.setColors(colors);
        DisplayMetrics metrics = getResources().getDisplayMetrics();
        float px = 5 * (metrics.densityDpi / 160f);
        pieDataSet.setSelectionShift(px); // 選中態多出的長度
        PieData pieData = new PieData(pieDataSet);
        return pieData;
    }
}

 activity_main.xml

 <com.github.mikephil.charting.charts.PieChart
        android:id="@+id/pieChart"
        android:layout_width="match_parent"
        android:layout_height="320dp"
       />