Question

我是AchartEngine的新手。我正在使用AchartEngine与android创建一个条形图。我查看了aChartEngine API并创建了一个Barchart，它的工作正常。

当我想看到我的实际视图时，我必须通过单击右下角的缩放按钮来降低缩放率。我需要使用缩放按钮显示我在程序中完全声明的完整条形图。
我需要从一个视图导航到另一个视图。因此，我使用ontouchlistner创建了一个图形视图，但它显示错误。

任何想法都将不胜感激。我在这里错过了什么吗？

public class GraphicViewExample extends Activity {
  private String[] mMonth = new String[] { "Jan", "Feb", "Mar", "Apr", "May",
            "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
    int[] x = { 0, 1, 2, 3, 4, 5, 6, 7 };
    int[] income = { 2000, 2500, 2700, 3000, 2800, 3500, 3700, 3800 };
    public static final String TYPE = "type";
    private XYMultipleSeriesDataset mDataset = getDemoDataset();
    private XYMultipleSeriesRenderer mRenderer = getDemoRenderer();
    private GraphicalView mChartView;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.graphicviewexample);
        if (mChartView == null) {
            LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
            mChartView = ChartFactory.getBarChartView(this, mDataset,
                    mRenderer, Type.DEFAULT);
            mRenderer.setSelectableBuffer(100);
            layout.addView(mChartView, new LayoutParams(
                    LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        } else {
            mChartView.repaint();
        }

        mChartView.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub

                @SuppressWarnings("unused")
                /*SeriesSelection seriesSelection = mChartView
                        .getCurrentSeriesAndPoint();*/
                SimpleSeriesRenderer r = new SimpleSeriesRenderer();
                mRenderer.removeAllRenderers();
                r.setColor(Color.RED);
                mChartView.repaint();
                return true;
            }
        });

        /*mChartView.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                 * LinearLayout slayout = (LinearLayout)
                 * findViewById(R.id.chart); ChartView =
                 * ChartFactory.getBarChartView( getApplicationContext(),
                 * sDataset, smRenderer, Type.DEFAULT);
                 * slayout.addView(ChartView, new LayoutParams(
                 * LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
                 * 
                 * ChartView.repaint();

                mChartView.repaint();
            }
        });*/
    }

    private XYMultipleSeriesDataset getDemoDataset() {

        XYSeries incomeSeries = new XYSeries("Income");
        for (int i = 0; i < x.length; i++) {
            incomeSeries.add(i, income[i]);
        }

        XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
        dataset.addSeries(incomeSeries);
        return dataset;

    }

    private XYMultipleSeriesRenderer getDemoRenderer() {
        XYSeriesRenderer incomeRenderer = new XYSeriesRenderer();
        incomeRenderer.setColor(Color.rgb(130, 130, 230));
        incomeRenderer.setFillPoints(true);
        incomeRenderer.setLineWidth(2);
        incomeRenderer.setDisplayChartValues(true);

        XYMultipleSeriesRenderer multiRenderer = new XYMultipleSeriesRenderer();
        multiRenderer.setXLabels(0);
        multiRenderer.setBarSpacing(0.3f);
        multiRenderer.setBarWidth(30);
        multiRenderer.setChartTitle("Income Chart");
        multiRenderer.setXTitle("Year 2013");
        multiRenderer.setYTitle("Amount in Dollars");
        //multiRenderer.setZoomLimits(1.0,0.7,1.0,3000.0);
        multiRenderer.setZoomButtonsVisible(true);
        //multiRenderer.setZoomEnabled(true, true);
        //multiRenderer.setPanEnabled(true, true);
        multiRenderer.setInScroll(true);
        multiRenderer.setXAxisMin(0);
        multiRenderer.setXAxisMax(7);
        multiRenderer.setYAxisMin(0);
        multiRenderer.setYAxisMax(4000);
        multiRenderer.setClickEnabled(true);
        multiRenderer.setShowGridX(true);
        for (int i = 0; i < x.length; i++) {
            multiRenderer.addXTextLabel(i, mMonth[i]);
        }

        multiRenderer.addSeriesRenderer(incomeRenderer);
        return multiRenderer;
    }

}

日志： java.lang.IndexOutOfBoundsException：索引0无效，大小为0

at java.util.ArrayList.throwIndexOutOfBoundsException（ArrayList.java:251）

at org.achartengine.renderer.DefaultRenderer.getSeriesRendererAt（DefaultRenderer.java:189）

at org.achartengine.chart.XYChart.draw（XYChart.java:240）

at org.achartengine.GraphicalView.onDraw（GraphicalView.java:168）

Answer 1

此代码适用于我的折线图

    v.setOnClickListener(new OnClickListener() {

                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    SeriesSelection seriesSelection = ((GraphicalView) v)
                            .getCurrentSeriesAndPoint();

                    Log.d("sreedhu", String.valueOf(seriesSelection));
                    if (seriesSelection == null) {
                        Log.d("sreedhu", "Nothing Selected");

                    } else {
//your code}
}
}

Answer 2

使用此代码缩放条形图...！

renderer.setScale((float) 1);

AChartEngine的几个问题

2 个答案: