android - achartengine 清除 XYMultipleSeriesRenderer 中的渲染器

Question

我的目标是创建一个图表，该图表将根据用户操作隐藏和显示一系列内容。我想通过首先清除图形、数据集和渲染器，然后重新插入新值来做到这一点。与 Arraylists 的 .clear() 方法非常相似，我想知道是否有为 XYMultipleSeriesRenderer 构建的某种类型的类似功能。我注意到 XYMultipleSeriesDataset 缺乏类似的功能，但我能够通过执行

来解决这个问题(我想，我还不能确定)

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

幸运的是，XYMultipleSeriesRenderer 似乎有一个 getrenderercount 类型的方法，但没有采用 ints 的删除方法。我所看到的只是一个删除函数，它不接受ints，只接受实际的系列渲染器名称。

这里有更多代码(如果有帮助的话):

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

不确定我完全理解你的问题，但我可以给你一些线索。

要删除 XYMultipleSeriesRenderer 中的所有渲染器:

renderer.removeAllRenderers();

要删除 XYMultipleSeriesDataset 中的所有系列:

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，如果您想隐藏一个系列，则只需删除该系列而不是全部。