Android图表库MPAndroidChart(十一)——多层级的堆叠条形图

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一.基本实现

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

        //堆叠条形图
        mBarChart = (BarChart) findViewById(R.id.mBarChart);
        mBarChart.setOnChartValueSelectedListener(this);
        mBarChart.getDescription().setEnabled(false);
        mBarChart.setMaxVisibleValueCount(40);
        // 扩展现在只能分别在x轴和y轴
        mBarChart.setPinchZoom(false);
        mBarChart.setDrawGridBackground(false);
        mBarChart.setDrawBarShadow(false);
        mBarChart.setDrawValueAboveBar(false);
        mBarChart.setHighlightFullBarEnabled(false);

        // 改变y标签的位置
        YAxis leftAxis = mBarChart.getAxisLeft();
        leftAxis.setValueFormatter(new MyAxisValueFormatter());
        leftAxis.setAxisMinimum(0f);
        mBarChart.getAxisRight().setEnabled(false);

        XAxis xLabels = mBarChart.getXAxis();
        xLabels.setPosition(XAxis.XAxisPosition.TOP);

        Legend l = mBarChart.getLegend();
        l.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
        l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
        l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
        l.setDrawInside(false);
        l.setFormSize(8f);
        l.setFormToTextSpace(4f);
        l.setXEntrySpace(6f);

        setData();

    //初始化
    private void setData() {
        ArrayList<BarEntry> yVals1 = new ArrayList<BarEntry>();

        for (int i = 0; i < 30 + 1; i++) {
            float mult = (50 + 1);
            float val1 = (float) (Math.random() * mult) + mult / 3;
            float val2 = (float) (Math.random() * mult) + mult / 3;
            float val3 = (float) (Math.random() * mult) + mult / 3;
            yVals1.add(new BarEntry(i, new float[]{val1, val2, val3}));
        }

        BarDataSet set1;

        if (mBarChart.getData() != null &&
                mBarChart.getData().getDataSetCount() > 0) {
            set1 = (BarDataSet) mBarChart.getData().getDataSetByIndex(0);
            set1.setValues(yVals1);
            mBarChart.getData().notifyDataChanged();
            mBarChart.notifyDataSetChanged();
        } else {
            set1 = new BarDataSet(yVals1, "三年级一班期末考试");
            set1.setColors(getColors());
            set1.setStackLabels(new String[]{"及格", "优秀", "不及格"});

            ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();
            dataSets.add(set1);

            BarData data = new BarData(dataSets);
            data.setValueFormatter(new MyValueFormatter());
            data.setValueTextColor(Color.WHITE);

            mBarChart.setData(data);
        }
        mBarChart.setFitBars(true);
        mBarChart.invalidate();
    }

   private int[] getColors() {
        int stacksize = 3;
        //有尽可能多的颜色每项堆栈值
        int[] colors = new int[stacksize];
        for (int i = 0; i < colors.length; i++) {
            colors[i] = ColorTemplate.MATERIAL_COLORS[i];
        }
        return colors;
    }

二.显示顶点值

三.x轴动画

四.y轴动画

五.xy轴动画

六.显示边框

activity_stackedbar.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.BarChart
        android:id="@+id/mBarChart"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

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

        <Button
            android:id="@+id/btn_show_values"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="顶点显示值"/>

        <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"/>

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

    </LinearLayout>

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

        <Button
            android:id="@+id/btn_save_pic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="保存到相册"/>

        <Button
            android:id="@+id/btn_auto_mix_max"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="自动最大最小值"/>

        <Button
            android:id="@+id/btn_actionToggleHighlight"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="高亮显示"/>

        <Button
            android:id="@+id/btn_show_border"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="显示边框"/>

    </LinearLayout>

</LinearLayout>

StackedBarActivity

public class StackedBarActivity extends BaseActivity implements OnChartValueSelectedListener, View.OnClickListener {

    private BarChart mBarChart;

    //显示顶点值
    private Button btn_show_values;
    //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;
    //切换自动最大最小值
    private Button btn_auto_mix_max;
    //高亮显示
    private Button btn_actionToggleHighlight;
    //显示边框
    private Button btn_show_border;

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

        initView();
    }

    //初始化
    private void initView() {

        //基本控件
        btn_show_values = (Button) findViewById(R.id.btn_show_values);
        btn_show_values.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_auto_mix_max = (Button) findViewById(R.id.btn_auto_mix_max);
        btn_auto_mix_max.setOnClickListener(this);
        btn_actionToggleHighlight = (Button) findViewById(R.id.btn_actionToggleHighlight);
        btn_actionToggleHighlight.setOnClickListener(this);
        btn_show_border = (Button) findViewById(R.id.btn_show_border);
        btn_show_border.setOnClickListener(this);

        //堆叠条形图
        mBarChart = (BarChart) findViewById(R.id.mBarChart);
        mBarChart.setOnChartValueSelectedListener(this);
        mBarChart.getDescription().setEnabled(false);
        mBarChart.setMaxVisibleValueCount(40);
        // 扩展现在只能分别在x轴和y轴
        mBarChart.setPinchZoom(false);
        mBarChart.setDrawGridBackground(false);
        mBarChart.setDrawBarShadow(false);
        mBarChart.setDrawValueAboveBar(false);
        mBarChart.setHighlightFullBarEnabled(false);

        // 改变y标签的位置
        YAxis leftAxis = mBarChart.getAxisLeft();
        leftAxis.setValueFormatter(new MyAxisValueFormatter());
        leftAxis.setAxisMinimum(0f);
        mBarChart.getAxisRight().setEnabled(false);

        XAxis xLabels = mBarChart.getXAxis();
        xLabels.setPosition(XAxis.XAxisPosition.TOP);

        Legend l = mBarChart.getLegend();
        l.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
        l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
        l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
        l.setDrawInside(false);
        l.setFormSize(8f);
        l.setFormToTextSpace(4f);
        l.setXEntrySpace(6f);

        setData();
    }

    //初始化
    private void setData() {
        ArrayList<BarEntry> yVals1 = new ArrayList<BarEntry>();

        for (int i = 0; i < 30 + 1; i++) {
            float mult = (50 + 1);
            float val1 = (float) (Math.random() * mult) + mult / 3;
            float val2 = (float) (Math.random() * mult) + mult / 3;
            float val3 = (float) (Math.random() * mult) + mult / 3;
            yVals1.add(new BarEntry(i, new float[]{val1, val2, val3}));
        }

        BarDataSet set1;

        if (mBarChart.getData() != null &&
                mBarChart.getData().getDataSetCount() > 0) {
            set1 = (BarDataSet) mBarChart.getData().getDataSetByIndex(0);
            set1.setValues(yVals1);
            mBarChart.getData().notifyDataChanged();
            mBarChart.notifyDataSetChanged();
        } else {
            set1 = new BarDataSet(yVals1, "三年级一班期末考试");
            set1.setColors(getColors());
            set1.setStackLabels(new String[]{"及格", "优秀", "不及格"});

            ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();
            dataSets.add(set1);

            BarData data = new BarData(dataSets);
            data.setValueFormatter(new MyValueFormatter());
            data.setValueTextColor(Color.WHITE);

            mBarChart.setData(data);
        }
        mBarChart.setFitBars(true);
        mBarChart.invalidate();
    }

    private int[] getColors() {
        int stacksize = 3;
        //有尽可能多的颜色每项堆栈值
        int[] colors = new int[stacksize];
        for (int i = 0; i < colors.length; i++) {
            colors[i] = ColorTemplate.MATERIAL_COLORS[i];
        }
        return colors;
    }

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

    }

    @Override
    public void onNothingSelected() {

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            //显示顶点值
            case R.id.btn_show_values:
                for (IDataSet set : mBarChart.getData().getDataSets())
                    set.setDrawValues(!set.isDrawValuesEnabled());

                mBarChart.invalidate();
                break;
            //x轴动画
            case R.id.btn_anim_x:
                mBarChart.animateX(3000);
                break;
            //y轴动画
            case R.id.btn_anim_y:
                mBarChart.animateY(3000);
                break;
            //xy轴动画
            case R.id.btn_anim_xy:
                mBarChart.animateXY(3000, 3000);
                break;
            //保存到sd卡
            case R.id.btn_save_pic:
                if (mBarChart.saveToGallery("title" + System.currentTimeMillis(), 50)) {
                    Toast.makeText(getApplicationContext(), "保存成功",
                            Toast.LENGTH_SHORT).show();
                } else
                    Toast.makeText(getApplicationContext(), "保存失败",
                            Toast.LENGTH_SHORT).show();
                break;
            //切换自动最大最小值
            case R.id.btn_auto_mix_max:
                mBarChart.setAutoScaleMinMaxEnabled(!mBarChart.isAutoScaleMinMaxEnabled());
                mBarChart.notifyDataSetChanged();
                break;
            //高亮显示
            case R.id.btn_actionToggleHighlight:
                if (mBarChart.getData() != null) {
                    mBarChart.getData().setHighlightEnabled(
                            !mBarChart.getData().isHighlightEnabled());
                    mBarChart.invalidate();
                }
                break;
            //显示边框
            case R.id.btn_show_border:
                for (IBarDataSet set : mBarChart.getData().getDataSets())
                    ((BarDataSet) set).setBarBorderWidth(set.getBarBorderWidth() == 1.f ? 0.f : 1.f);
                mBarChart.invalidate();
                break;
        }
    }
}

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