Android图表库MPAndroidChart(八)——饼状图的扩展：折线饼状图

我们接着上文，饼状图的扩展，增加折现的说明，来看下我们要实现的效果

因为之前对MPAndroidChart的熟悉，所有我们就可以直接来实现了

一.基本实现

首先，就是我们的来看下他的定义布局

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

嗯，这里我们还是用PieChart，那现在该干嘛就干嘛了

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

        mPieChart.setDragDecelerationFrictionCoef(0.95f);
        //绘制中间文字
        mPieChart.setCenterText(generateCenterSpannableText());
        mPieChart.setExtraOffsets(20.f, 0.f, 20.f, 0.f);

        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);

        // 添加一个选择监听器
        mPieChart.setOnChartValueSelectedListener(this);

        //模拟数据
        ArrayList<PieEntry> entries = new ArrayList<PieEntry>();
        entries.add(new PieEntry(40, "优秀"));
        entries.add(new PieEntry(20, "满分"));
        entries.add(new PieEntry(30, "及格"));
        entries.add(new PieEntry(10, "不及格"));

        //设置数据
        setData(entries);

        //默认动画
        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.setEnabled(false);

少不了我们的设置数据

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

        dataSet.setValueLinePart1OffsetPercentage(80.f);
        dataSet.setValueLinePart1Length(0.2f);
        dataSet.setValueLinePart2Length(0.4f);
        dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);

        PieData data = new PieData(dataSet);
        data.setValueFormatter(new PercentFormatter());
        data.setValueTextSize(11f);
        data.setValueTextColor(Color.BLACK);
        mPieChart.setData(data);

        // 撤销所有的亮点
        mPieChart.highlightValues(null);

        mPieChart.invalidate();
    }

这里，可不能把中间文字给丢了

    //绘制中心文字
    private SpannableString generateCenterSpannableText() {
        SpannableString s = new SpannableString("刘某人程序员\n我仿佛听到有人说我帅");
        //s.setSpan(new RelativeSizeSpan(1.5f), 0, 14, 0);
        //s.setSpan(new StyleSpan(Typeface.NORMAL), 14, s.length() - 15, 0);
        //s.setSpan(new ForegroundColorSpan(Color.GRAY), 14, s.length() - 15, 0);
        //s.setSpan(new RelativeSizeSpan(.65f), 14, s.length() - 15, 0);
        //s.setSpan(new StyleSpan(Typeface.ITALIC), s.length() - 14, s.length(), 0);
        //s.setSpan(new ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length()-17, s.length(), 0);
        return s;
    }

现在运行一下就可以了，这个不难，我们继续看他的实现

二.显示百分比

三.显示类型

四.x轴动画

五.y轴动画

六.xy轴动画

七.显示中间文字

八.旋转动画

这里代码贴上

activity_pie_line.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

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

    <!--还有显示描述等等-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn_show_percentage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="显示百分比"/>

        <Button
            android:id="@+id/btn_show_type"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="是否铺满"/>

        <Button
            android:id="@+id/btn_anim_x"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="X轴动画"/>

        <Button
            android:id="@+id/btn_anim_y"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Y轴动画"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn_anim_xy"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="XY轴动画"/>

        <Button
            android:id="@+id/btn_show_center_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="显示中间文字"/>

        <Button
            android:id="@+id/btn_save_pic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="保存画廊"/>

        <Button
            android:id="@+id/btn_anim_rotating"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="旋转动画"/>

    </LinearLayout>

</LinearLayout>

PiePolylineChartActivity

public class PiePolylineChartActivity extends BaseActivity 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_pie_line);

        initView();
    }

    //初始化
    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);

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

        mPieChart.setDragDecelerationFrictionCoef(0.95f);
        //绘制中间文字
        mPieChart.setCenterText(generateCenterSpannableText());
        mPieChart.setExtraOffsets(20.f, 0.f, 20.f, 0.f);

        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);

        // 添加一个选择监听器
        mPieChart.setOnChartValueSelectedListener(this);

        //模拟数据
        ArrayList<PieEntry> entries = new ArrayList<PieEntry>();
        entries.add(new PieEntry(40, "优秀"));
        entries.add(new PieEntry(20, "满分"));
        entries.add(new PieEntry(30, "及格"));
        entries.add(new PieEntry(10, "不及格"));

        //设置数据
        setData(entries);

        //默认动画
        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.setEnabled(false);
    }

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

        dataSet.setValueLinePart1OffsetPercentage(80.f);
        dataSet.setValueLinePart1Length(0.2f);
        dataSet.setValueLinePart2Length(0.4f);
        dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);

        PieData data = new PieData(dataSet);
        data.setValueFormatter(new PercentFormatter());
        data.setValueTextSize(11f);
        data.setValueTextColor(Color.BLACK);
        mPieChart.setData(data);

        // 撤销所有的亮点
        mPieChart.highlightValues(null);

        mPieChart.invalidate();
    }

    //绘制中心文字
    private SpannableString generateCenterSpannableText() {
        SpannableString s = new SpannableString("刘某人程序员\n我仿佛听到有人说我帅");
        //s.setSpan(new RelativeSizeSpan(1.5f), 0, 14, 0);
        //s.setSpan(new StyleSpan(Typeface.NORMAL), 14, s.length() - 15, 0);
        //s.setSpan(new ForegroundColorSpan(Color.GRAY), 14, s.length() - 15, 0);
        //s.setSpan(new RelativeSizeSpan(.65f), 14, s.length() - 15, 0);
        //s.setSpan(new StyleSpan(Typeface.ITALIC), s.length() - 14, s.length(), 0);
        //s.setSpan(new ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length()-17, s.length(), 0);
        return s;
    }

    @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;
        }
    }
}

好的，是不是很简单

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