package com.jackie.mpandroidpiechart; 
import java.util.ArrayList; 
import com.github.mikephil.charting.charts.PieChart; 
import com.github.mikephil.charting.components.Legend; 
import com.github.mikephil.charting.components.Legend.LegendPosition; 
import com.github.mikephil.charting.data.Entry; 
import com.github.mikephil.charting.data.PieData; 
import com.github.mikephil.charting.data.PieDataSet; 
import android.support.v7.app.ActionBarActivity; 
import android.graphics.Color; 
import android.os.Bundle; 
import android.util.DisplayMetrics; 
public class MainActivity extends ActionBarActivity { 
 private PieChart mChart; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 mChart = (PieChart) findViewById(R.id.spread_pie_chart); 
 PieData mPieData = getPieData(4, 100); 
 showChart(mChart, mPieData); 
 } 
 private void showChart(PieChart pieChart, PieData pieData) { 
 pieChart.setHoleColorTransparent(true); 
 pieChart.setHoleRadius(60f); //半徑 
 pieChart.setTransparentCircleRadius(64f); // 半透明圈 
 //pieChart.setHoleRadius(0) //實(shí)心圓 
 pieChart.setDescription("測(cè)試餅狀圖"); 
 // mChart.setDrawYValues(true); 
 pieChart.setDrawCenterText(true); //餅狀圖中間可以添加文字 
 pieChart.setDrawHoleEnabled(true); 
 pieChart.setRotationAngle(90); // 初始旋轉(zhuǎn)角度 
 // draws the corresponding description value into the slice 
 // mChart.setDrawXValues(true); 
 // enable rotation of the chart by touch 
 pieChart.setRotationEnabled(true); // 可以手動(dòng)旋轉(zhuǎn) 
 // display percentage values 
 pieChart.setUsePercentValues(true); //顯示成百分比 
 // mChart.setUnit(" €"); 
 // mChart.setDrawUnitsInChart(true); 
 // add a selection listener 
// mChart.setOnChartValueSelectedListener(this); 
 // mChart.setTouchEnabled(false); 
// mChart.setOnAnimationListener(this); 
 pieChart.setCenterText("Quarterly Revenue"); //餅狀圖中間的文字 
 //設(shè)置數(shù)據(jù) 
 pieChart.setData(pieData); 
 // undo all highlights 
// pieChart.highlightValues(null); 
// pieChart.invalidate(); 
 Legend mLegend = pieChart.getLegend(); //設(shè)置比例圖 
 mLegend.setPosition(LegendPosition.RIGHT_OF_CHART); //最右邊顯示 
// mLegend.setForm(LegendForm.LINE); //設(shè)置比例圖的形狀，默認(rèn)是方形 
 mLegend.setXEntrySpace(7f); 
 mLegend.setYEntrySpace(5f); 
 pieChart.animateXY(1000, 1000); //設(shè)置動(dòng)畫(huà) 
 // mChart.spin(2000, 0, 360); 
 } 
 /** 
 * 
 * @param count 分成幾部分 
 * @param range 
 */ 
 private PieData getPieData(int count, float range) { 
 ArrayList<String> xValues = new ArrayList<String>(); //xVals用來(lái)表示每個(gè)餅塊上的內(nèi)容 
 for (int i = 0; i < count; i++) { 
 xValues.add("Quarterly" + (i + 1)); //餅塊上顯示成Quarterly1, Quarterly2, Quarterly3, Quarterly4 
 } 
 ArrayList<Entry> yValues = new ArrayList<Entry>(); //yVals用來(lái)表示封裝每個(gè)餅塊的實(shí)際數(shù)據(jù) 
 // 餅圖數(shù)據(jù) 
 /** 
 * 將一個(gè)餅形圖分成四部分， 四部分的數(shù)值比例為14:14:34:38 
 * 所以 14代表的百分比就是14% 
 */ 
 float quarterly1 = 14; 
 float quarterly2 = 14; 
 float quarterly3 = 34; 
 float quarterly4 = 38; 
 yValues.add(new Entry(quarterly1, 0)); 
 yValues.add(new Entry(quarterly2, 1)); 
 yValues.add(new Entry(quarterly3, 2)); 
 yValues.add(new Entry(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(shè)置個(gè)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(tài)多出的長(zhǎng)度 
 PieData pieData = new PieData(xValues, pieDataSet); 
 return pieData; 
 } 
}