如何在Android中绘制饼图

我想在我的 Android应用程序中绘制一个饼图.
你能建议我一个简单的方法吗？
我为此写了一个视图类,但不令人满意.所以,如果你告诉我一个好的和高性能的图表库,我将不胜感激.

解决方法

从下载jar

http://www.achartengine.org/content/download.html

将jar添加到项目lib文件夹.还有开发人员提供的示例.您可以根据需要检查并修改相同的内容.

还有一个演示@

http://www.achartengine.org/content/demo.html

文件

http://www.achartengine.org/content/javadoc/org/achartengine/chart/PieChart.html

例：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/chart"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="horizontal" >
    </LinearLayout>

</LinearLayout>

活动类

public class AChartEnginePieChartActivity extends Activity { 

    private static int[] COLORS = new int[] { Color.GREEN,Color.BLUE,Color.magenta,Color.CYAN };

    private static double[] VALUES = new double[] { 10,11,12,13 };

    private static String[] NAME_LIST = new String[] { "A","B","C","D" };

    private CategorySeries mSeries = new CategorySeries("");

    private DefaultRenderer mRenderer = new DefaultRenderer();

    private GraphicalView mChartView;

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

        mRenderer.setApplyBackgroundColor(true);
        mRenderer.setBackgroundColor(Color.argb(100,50,50));
        mRenderer.setChartTitleTextSize(20);
        mRenderer.setLabelsTextSize(15);
        mRenderer.setLegendTextSize(15);
        mRenderer.setMargins(new int[] { 20,30,15,0 });
        mRenderer.setZoomButtonsVisible(true);
        mRenderer.setStartAngle(90);

        for (int i = 0; i < VALUES.length; i++) {
            mSeries.add(NAME_LIST[i] + " " + VALUES[i],VALUES[i]);
            SimpleSeriesRenderer renderer = new SimpleSeriesRenderer();
            renderer.setColor(COLORS[(mSeries.getItemCount() - 1) % COLORS.length]);
            mRenderer.addSeriesRenderer(renderer);
        }

        if (mChartView != null) {
            mChartView.repaint();
        }

    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mChartView == null) {
            LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
            mChartView = ChartFactory.getPieChartView(this,mSeries,mRenderer);
            mRenderer.setClickEnabled(true);
            mRenderer.setSelectableBuffer(10);

            mChartView.setonClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();

                    if (seriesSelection == null) {
                        Toast.makeText(AChartEnginePieChartActivity.this,"No chart element was clicked",Toast.LENGTH_SHORT).show();
                    }
                    else {
                        Toast.makeText(AChartEnginePieChartActivity.this,"Chart element data point index "+ (seriesSelection.getPointIndex()+1) + " was clicked" + " point value="+ seriesSelection.getValue(),Toast.LENGTH_SHORT).show();
                    }
                }
            });

            mChartView.setonLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
                    if (seriesSelection == null) {
                        Toast.makeText(AChartEnginePieChartActivity.this,"No chart element was long pressed",Toast.LENGTH_SHORT);
                        return false; 
                    }
                    else {
                        Toast.makeText(AChartEnginePieChartActivity.this,"Chart element data point index "+ seriesSelection.getPointIndex()+ " was long pressed",Toast.LENGTH_SHORT);
                        return true;       
                    }
                }
            });
            layout.addView(mChartView,new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
        }
        else {
        mChartView.repaint();
        }
    }
}

原文地址：https://www.jb51.cc/android/311085.html