Android之MPAndroidChart的动态饼图

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导入MPAndroidChart的jar包以后就写个工具类：

package itsoha.com.tffic.Utils;

import android.content.Context;
import android.graphics.Color;

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

import java.util.ArrayList;

public class PieEngine {
    private String title;
    private PieChart mChart;

    public PieEngine(String title) {
        this.title = title;
    }

    public PieChart getView(Context context, ArrayList<String> name, ArrayList<Integer> colors, ArrayList<Integer> values) {
        mChart = new PieChart(context);

        //设置孔颜色透明
        mChart.setHoleColorTransparent(true);
        //半径
        mChart.setHoleRadius(60f);
        //半透明圆
        mChart.setTransparentCircleRadius(64f);
        mChart.setDescription("");
        //饼图中间可以添加文字
        mChart.setDrawCenterText(true);
        //拉孔启用
        mChart.setDrawHoleEnabled(true);
        //初始旋转角度
        mChart.setRotationAngle(90f);
        //手动旋转
        mChart.setRotationEnabled(true);
        mChart.setDrawHoleEnabled(true);
        //显示百分比
        mChart.setUsePercentValues(true);

        Legend legend = mChart.getLegend();
        legend.setFormSize(18);
        legend.setTextSize(29);
        legend.setXEntrySpace(35);
        legend.setYEntrySpace(35);
        legend.setPosition(Legend.LegendPosition.LEFT_OF_CHART);

        ArrayList<Entry> entryArrayList = new ArrayList<>();
        for (int i = 0; i < values.size(); i++) {
            entryArrayList.add(new Entry(values.get(i),i));
        }

        PieDataSet dataSet = new PieDataSet(entryArrayList, title);
        dataSet.setValueTextSize(28);
        dataSet.setColors(colors);
        dataSet.setSelectionShift(5);

        PieData data = new PieData(name, dataSet);
        data.setValueTextSize(25);

        mChart.setData(data);
        mChart.notifyDataSetChanged();

        return mChart;
    }


}

调用方式如下：

package itsoha.com.tffic.fragment;

import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;

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

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

import itsoha.com.tffic.R;
import itsoha.com.tffic.Utils.PieEngine;



public class PieFragment extends Fragment {
    private Handler handler = new Handler();
    private ArrayList<String> names = new ArrayList<>();
    private ArrayList<Integer> colors = new ArrayList<>();
    private Random random = new Random();
    private PieEngine engine;
    private PieChart chart;
    private FrameLayout fl;
    private Runnable runnable = new Runnable() {
        @Override
        public void run() {

            fl.removeAllViews();
            ArrayList<Integer> values = new ArrayList<>();
            values.add(random.nextInt(100));
            values.add(random.nextInt(100));
            values.add(random.nextInt(100));
            chart = engine.getView(getActivity(),names,colors,values);

            fl.addView(chart);
            handler.postDelayed(runnable, 1500);
        }
    };


    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_pie, container, false);
        fl = view.findViewById(R.id.fl_pie);
        engine = new PieEngine("Test");
        names.add("one");
        names.add("to");
        names.add("three");

        colors.add(Color.RED);
        colors.add(Color.BLUE);
        colors.add(Color.GREEN);
        handler.post(runnable);
        return view;
    }
}