XYMultipleSeriesRenderer中的achartengine清晰渲染器

Question

我的目標是創建一個圖形，根據用戶操作隱藏和顯示一系列圖形。我想通過首先清除圖表和數據集和渲染器，然後重新插入新值來實現這一點。就像Arraylists的.clear()方法一樣，我想知道是否爲XYMultipleSeriesRenderer構建了一些類似的功能。我注意到，XYMultipleSeriesDataset是缺乏類似的功能，但我可以做

 for(int i = 0; i < dataset.getSeriesCount(); i++) { 
      dataset.removeSeries(i); 
     } 

幸運的是XYMultipleSeriesRenderer似乎有方法的getrenderercount類型，以解決（我想，我不能肯定還沒有），但不是一個需要ints的移除方法。我所看到的只是一個刪除功能，不需要ints，只是實際的系列渲染器名稱。

這裏是更多的代碼是否有幫助：

private void excecuteGraph() { 
    //  add series to the complete dataset 
    XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset(); 
    XYMultipleSeriesRenderer mrenderer = new XYMultipleSeriesRenderer(); 

    switch (graphCase){ 
    case -1: 
     dataset.addSeries(series0); 
     dataset.addSeries(series1); 
     dataset.addSeries(series2); 
     dataset.addSeries(series3);  

     //   create the individual renderers, customize settings for each 
     XYSeriesRenderer renderer1 = new XYSeriesRenderer(); 
     renderer1.setColor(Color.BLUE); 
     renderer1.setLineWidth(3); 
     XYSeriesRenderer renderer2 = new XYSeriesRenderer(); 
     renderer2.setColor(Color.DKGRAY); 
     renderer2.setLineWidth(3); 
     XYSeriesRenderer renderer3 = new XYSeriesRenderer(); 
     renderer3.setColor(Color.RED);  
     renderer3.setLineWidth(3); 
     XYSeriesRenderer renderer4 = new XYSeriesRenderer(); 
     renderer4.setColor(Color.WHITE);   
     renderer4.setLineWidth(3); 

     //   add renderers to the complete multirenderer, customize settings for it 
     mrenderer.addSeriesRenderer(renderer1); 
     mrenderer.addSeriesRenderer(renderer2); 
     mrenderer.addSeriesRenderer(renderer3); 
     mrenderer.addSeriesRenderer(renderer4); 
     break; 
    case 0: 
     for(int i = 0; i < dataset.getSeriesCount(); i++) { 
      dataset.removeSeries(i); 
     } 

     dataset.addSeries(series0); 
     XYSeriesRenderer renderer00 = new XYSeriesRenderer(); 
     renderer00.setColor(Color.BLUE); 
     renderer00.setLineWidth(3); 
     mrenderer.addSeriesRenderer(renderer00); 
     break; 
    case 1: 
     for(int i = 0; i < dataset.getSeriesCount(); i++) { 
      dataset.removeSeries(i); 
      Log.d("testingGraph", dataset.toString()); 
     } 

     dataset.addSeries(series1); 
     XYSeriesRenderer renderer10 = new XYSeriesRenderer(); 
     renderer10.setColor(Color.DKGRAY); 
     renderer10.setLineWidth(3); 
     mrenderer.addSeriesRenderer(renderer10); 
     break; 
    case 2: 
     for(int i = 0; i < dataset.getSeriesCount(); i++) { 
      dataset.removeSeries(i); 
     } 
     dataset.addSeries(series2); 
     XYSeriesRenderer renderer20 = new XYSeriesRenderer(); 
     renderer20.setColor(Color.RED);  
     renderer20.setLineWidth(3); 
     mrenderer.addSeriesRenderer(renderer20); 
    case 3: 
     for(int i = 0; i < dataset.getSeriesCount(); i++) { 
      dataset.removeSeries(i); 
     } 
     dataset.addSeries(series3); 
     XYSeriesRenderer renderer30 = new XYSeriesRenderer(); 
     renderer30.setColor(Color.WHITE);  
     renderer30.setLineWidth(3); 
     mrenderer.addSeriesRenderer(renderer30); 
    } 

    mrenderer.setYTitle("Accuracy (%)"); 
    mrenderer.setYAxisMin(0); 
    mrenderer.setYAxisMax(100); 
    mrenderer.setApplyBackgroundColor(true); 
    mrenderer.setBackgroundColor(Color.TRANSPARENT); 

    //  Get the chart view result, add it to the linear layout 
    GraphicalView mChartView = ChartFactory.getTimeChartView(this, dataset, 
      mrenderer, "MM/dd/yyyy"); 

    LinearLayout graphLayout = (LinearLayout) findViewById(R.id.layout_graph); 
    graphLayout.addView(mChartView, new LayoutParams(LayoutParams.MATCH_PARENT, 
      LayoutParams.MATCH_PARENT));   

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

} 

Answer 1

不知道我理解你的問題完全是，但我可以給你一些線索。

要刪除所有渲染在XYMultipleSeriesRenderer：

renderer.removeAllRenderers(); 

要刪除所有系列中的XYMultipleSeriesDataset：

int size = dataset.getSeriesCount(); 
for (int i = 0; i < size; i++) { 
    // always remove the first element because once you remove one element, 
    // the size of the list becomes size - 1 and so on 
    dataset.removeSeries(0); 
} 

但是，如果你想隱藏一個單系列，則只需刪除一個而不是全部。