Android图表库MPAndroidChart(五)饼状图

应用

package com.fate.mpandroidchartfive;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.SpannableString;
import android.view.View;
import android.widget.Button;

import com.github.mikephil.charting.animation.Easing;
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 com.github.mikephil.charting.data.PieEntry;
import com.github.mikephil.charting.formatter.PercentFormatter;
import com.github.mikephil.charting.highlight.Highlight;
import com.github.mikephil.charting.interfaces.datasets.IDataSet;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.ColorTemplate;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements OnChartValueSelectedListener, View.OnClickListener {

    private PieChart mPieChart;

    //显示百分比
    private Button btn_show_percentage;
    //显示类型
    private Button btn_show_type;
    //x轴动画
    private Button btn_anim_x;
    //y轴动画
    private Button btn_anim_y;
    //xy轴动画
    private Button btn_anim_xy;
    //保存到sd卡
    private Button btn_save_pic;
    //显示中间文字
    private Button btn_show_center_text;
    //旋转动画
    private Button btn_anim_rotating;

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

        initView();
    }

    //初始化View
    private void initView() {

        btn_show_percentage = (Button) findViewById(R.id.btn_show_percentage);
        btn_show_percentage.setOnClickListener(this);
        btn_show_type = (Button) findViewById(R.id.btn_show_type);
        btn_show_type.setOnClickListener(this);
        btn_anim_x = (Button) findViewById(R.id.btn_anim_x);
        btn_anim_x.setOnClickListener(this);
        btn_anim_y = (Button) findViewById(R.id.btn_anim_y);
        btn_anim_y.setOnClickListener(this);
        btn_anim_xy = (Button) findViewById(R.id.btn_anim_xy);
        btn_anim_xy.setOnClickListener(this);
        btn_save_pic = (Button) findViewById(R.id.btn_save_pic);
        btn_save_pic.setOnClickListener(this);
        btn_show_center_text = (Button) findViewById(R.id.btn_show_center_text);
        btn_show_center_text.setOnClickListener(this);
        btn_anim_rotating = (Button) findViewById(R.id.btn_anim_rotating);
        btn_anim_rotating.setOnClickListener(this);


        //饼状图
        mPieChart = (PieChart) findViewById(R.id.mPieChart);
        mPieChart.setUsePercentValues(true);
        mPieChart.getDescription().setEnabled(false);
        mPieChart.setExtraOffsets(5, 10, 5, 5);

        mPieChart.setDragDecelerationFrictionCoef(0.95f);
        //设置中间文件
        mPieChart.setCenterText(generateCenterSpannableText());

        mPieChart.setDrawHoleEnabled(true);
        mPieChart.setHoleColor(Color.WHITE);

        mPieChart.setTransparentCircleColor(Color.WHITE);
        mPieChart.setTransparentCircleAlpha(110);

        mPieChart.setHoleRadius(58f);
        mPieChart.setTransparentCircleRadius(61f);

        mPieChart.setDrawCenterText(true);

        mPieChart.setRotationAngle(0);
        // 触摸旋转
        mPieChart.setRotationEnabled(true);
        mPieChart.setHighlightPerTapEnabled(true);

        //变化监听
        mPieChart.setOnChartValueSelectedListener(this);

        //模拟数据
        ArrayList entries = new ArrayList();
        entries.add(new PieEntry(20, "优秀"));
        entries.add(new PieEntry(30, "良好"));
        entries.add(new PieEntry(30, "及格"));
        entries.add(new PieEntry(20, "不及格"));

        //设置数据
        setData(entries);

        mPieChart.animateY(1400, Easing.EasingOption.EaseInOutQuad);

        Legend l = mPieChart.getLegend();
        l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
        l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
        l.setOrientation(Legend.LegendOrientation.VERTICAL);
        l.setDrawInside(false);
        l.setXEntrySpace(7f);
        l.setYEntrySpace(0f);
        l.setYOffset(0f);

        // 输入标签样式
        mPieChart.setEntryLabelColor(Color.WHITE);
        mPieChart.setEntryLabelTextSize(8f);
    }

    //设置中间文字
    private SpannableString generateCenterSpannableText() {
        SpannableString s = new SpannableString("成绩统计");
        return s;
    }

    //设置数据
    private void setData(ArrayList entries) {
        PieDataSet dataSet = new PieDataSet(entries, "三年级一班");
        dataSet.setSliceSpace(3f);
        dataSet.setSelectionShift(5f);

        //数据和颜色
        ArrayList colors = new ArrayList();
        for (int c : ColorTemplate.VORDIPLOM_COLORS)
            colors.add(c);
        for (int c : ColorTemplate.JOYFUL_COLORS)
            colors.add(c);
        for (int c : ColorTemplate.COLORFUL_COLORS)
            colors.add(c);
        for (int c : ColorTemplate.LIBERTY_COLORS)
            colors.add(c);
        for (int c : ColorTemplate.PASTEL_COLORS)
            colors.add(c);
        colors.add(ColorTemplate.getHoloBlue());
        dataSet.setColors(colors);
        PieData data = new PieData(dataSet);
        data.setValueFormatter(new PercentFormatter());
        data.setValueTextSize(11f);
        data.setValueTextColor(Color.WHITE);
        mPieChart.setData(data);
        mPieChart.highlightValues(null);
        //刷新
        mPieChart.invalidate();
    }


    @Override
    public void onValueSelected(Entry e, Highlight h) {

    }

    @Override
    public void onNothingSelected() {

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            //显示百分比
            case R.id.btn_show_percentage:
                for (IDataSet set : mPieChart.getData().getDataSets())
                    set.setDrawValues(!set.isDrawValuesEnabled());

                mPieChart.invalidate();
                break;
            //显示类型
            case R.id.btn_show_type:
                if (mPieChart.isDrawHoleEnabled())
                    mPieChart.setDrawHoleEnabled(false);
                else
                    mPieChart.setDrawHoleEnabled(true);
                mPieChart.invalidate();
                break;
            //x轴动画
            case R.id.btn_anim_x:
                mPieChart.animateX(1400);
                break;
            //y轴动画
            case R.id.btn_anim_y:
                mPieChart.animateY(1400);
                break;
            //xy轴动画
            case R.id.btn_anim_xy:
                mPieChart.animateXY(1400, 1400);
                break;
            //保存到sd卡
            case R.id.btn_save_pic:
                mPieChart.saveToPath("title" + System.currentTimeMillis(), "");
                break;
            //显示中间文字
            case R.id.btn_show_center_text:
                if (mPieChart.isDrawCenterTextEnabled())
                    mPieChart.setDrawCenterText(false);
                else
                    mPieChart.setDrawCenterText(true);
                mPieChart.invalidate();
                break;
            //旋转动画
            case R.id.btn_anim_rotating:
                mPieChart.spin(1000, mPieChart.getRotationAngle(), mPieChart.getRotationAngle() + 360, Easing.EasingOption
                        .EaseInCubic);
                break;
        }
    }
}

布局

http://blog.csdn.net/qq_26787115/article/details/53213641