MPChart饼图自定义图例

package com.example.pieview;

import android.app.Activity;
import android.os.Bundle;
import android.widget.LinearLayout;

import com.github.mikephil.charting.charts.PieChart;

public class MainActivity extends Activity {

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

PieChart pieChart = (PieChart) findViewById(R.id.pieView);
LinearLayout legendLayout = (LinearLayout) findViewById(R.id.legend_layout);

// 模拟数据
float[] data = new float[] { 1.8f, 3, 5.5f, 10, 6, 5, 6, 4, 2, 1.3f,
0.9f };
String[] labels = new String[] { "A", "B", "C", "D", "E", "F", "G",
"H", "J", "K", "L" };

PieChartUtils.initPieChart(this, legendLayout, pieChart, data, labels);

}
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context=".MainActivity" >

<com.github.mikephil.charting.charts.PieChart
android:id="@+id/pieView"
android:layout_width="0dp"
android:layout_height="150dp"
android:layout_weight="1" />

<!-- 使用ScrollView解决数据太多时的显示问题。注意：height一定要固定 -->

<ScrollView
android:layout_width="0dp"
android:layout_height="150dp"
android:layout_weight="1" >

<LinearLayout
android:id="@+id/legend_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>

</LinearLayout>

package com.example.epnc.utils;

import android.content.Context;
import android.graphics.Color;
import android.view.Gravity;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.formatter.PercentFormatter;
import com.github.mikephil.charting.interfaces.datasets.IDataSet;

import java.util.ArrayList;
import java.util.Random;

/**
* Created by TCL on 2016/9/1.
* 饼图自定义图例的二次封装
*/
public class PieChartUtils {

/**
* @param context      上下文
* @param legendLayout 外层的Legend布局
* @param pieChart     要初始化的饼图
* @param data         饼图上的数据
* @param labels       饼图上的数据描述
*/
public static void initPieChart(Context context, LinearLayout legendLayout, PieChart pieChart, float[] data,
String[] labels) {
//设置描述
pieChart.setDescription("");
// 设置中心圆孔半径占整个饼状图半径的百分比（100f 是最大=整个图表的半径），默认的50％的百分比（即50f）。
pieChart.setHoleRadius(55f);
// 设置中间文字中大小
pieChart.setCenterTextSize(12f);
// 百分比显示
pieChart.setUsePercentValues(true);
// 禁用触摸
pieChart.setTouchEnabled(false);
//设置内置图例不显示
pieChart.getLegend().setEnabled(false);
// 设置隐藏饼图上文字，只显示百分比
pieChart.setDrawSliceText(false);

//数值
ArrayList<Entry> values = new ArrayList<Entry>();
//数值描述
ArrayList<String> valuesLabels = new ArrayList<>();
//颜色
int[] colors = new int[data.length];

//随机颜色需要随机
Random random = new Random();
for (int i = 0; i < data.length; i++) {
//添加数值
values.add(new Entry(data[i], i));
//添加数值描述
valuesLabels.add(labels[i]);

//随机颜色
int red = 30 + random.nextInt(200);
int green = 30 + random.nextInt(200);
int blue = 30 + random.nextInt(200);

//添加颜色
colors[i] = Color.rgb(red, green, blue);
}

PieDataSet pieDataSet = new PieDataSet(values, "");
pieDataSet.setSliceSpace(2f);
pieDataSet.setValueTextColor(Color.WHITE);
pieDataSet.setValueTextSize(12f);
//将随机的颜色设置进来
pieDataSet.setColors(colors);

PieData pieData = new PieData(valuesLabels, pieDataSet);
//设置百分比显示
pieData.setValueFormatter(new PercentFormatter());

//自定义图例 该方法一定要在setData之前执行
setCustomizeLegend(legendLayout, context, colors, data, labels);

//set data...
pieChart.setData(pieData);

//设置是否显示区域百分比的值
for (IDataSet<?> set : pieChart.getData().getDataSets()) {
set.setDrawValues(false);
}
}

private static void setCustomizeLegend(LinearLayout legendLayout, Context context, int[] colors, float[] data,
String[] labels) {
for (int i = 0; i < data.length; i++) {
//单个图例的layoutParams
LinearLayout.LayoutParams singleLegendLayoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
// 设置比重为1
singleLegendLayoutParams.weight = 1;
// 单个图例的布局
LinearLayout singleLegendLayout = new LinearLayout(context);
// 水平排列
singleLegendLayout.setOrientation(LinearLayout.HORIZONTAL);
// 垂直居中
singleLegendLayout.setGravity(Gravity.CENTER_VERTICAL);
singleLegendLayout.setLayoutParams(singleLegendLayoutParams);

//添加颜色方块
LinearLayout.LayoutParams colorLayoutParams = new LinearLayout.LayoutParams(
20, 20);
colorLayoutParams.setMargins(0, 0, 20, 0);
LinearLayout colorLayout = new LinearLayout(context);
colorLayout.setLayoutParams(colorLayoutParams);
colorLayout.setBackgroundColor(colors[i]);
singleLegendLayout.addView(colorLayout);

//Label部分和百分比数值部分
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.weight = 1;
params.gravity = Gravity.CENTER;

// 添加label
TextView tvLabel = new TextView(context);
tvLabel.setText(labels[i] + " ");
tvLabel.setLayoutParams(params);
singleLegendLayout.addView(tvLabel);

// 添加data(百分比显示)
TextView tvPercentData = new TextView(context);
float total = 0;
for (int j = 0; j < data.length; j++) {
total += data[j];
}
tvPercentData.setText((data[i] / total * 100 + "").substring(0, 4) + "%");
tvPercentData.setLayoutParams(params);
singleLegendLayout.addView(tvPercentData);

// legendLayout为外层布局即整个图例布局，是在xml文件中定义
legendLayout.addView(singleLegendLayout);
}
}

}