Question

我正在使用achartengine-1.1.0.jar。我的代码生成折线图，大多数时候都有效（见下文）

但有时会出现一个空白图表，其中y轴和x轴可见（从图像中可以看出）。这种情况相当随机。

enter image description here

我尝试过以各种方式复制问题，但仍无法找到根本原因。直到现在它似乎完全随机。

以下是负责图表的代码段：

String seriesTitle = "Alpha";
String seriesTitleB = "Beta";
String seriesTitleD = "Delta";
// create a new series of data
XYSeries series = new XYSeries(seriesTitle);
XYSeries seriesB = new XYSeries(seriesTitleB);
XYSeries seriesD = new XYSeries(seriesTitleD);
float x =1;
int c =0;
do{
   String s= alpha.getItems().get(c).toString();
   series.add((double)x, Double.parseDouble(s.substring(1, s.length()-1)));
   s= beta.getItems().get(c).toString();
   seriesB.add((double)x, Double.parseDouble(s.substring(1, s.length()-1)));
   s= delta.getItems().get(c).toString();
   seriesD.add((double)x, Double.parseDouble(s.substring(1, s.length()-1)));
   x++;
   c++;
}while(alpha.size() > c);

mDataset.addSeries(series);
mDataset.addSeries(seriesB);
mDataset.addSeries(seriesD);

// create a new renderer for the new series
XYSeriesRenderer renderer = new XYSeriesRenderer();
renderer.setColor(Color.argb(255, 238 , 89, 125));

// create a new renderer for the new series
XYSeriesRenderer rendererB = new XYSeriesRenderer();
rendererB.setColor(Color.argb(255, 29, 158, 225));

XYSeriesRenderer rendererD = new XYSeriesRenderer();
rendererD.setColor(Color.argb(255, 15, 122, 131));


mRenderer.addSeriesRenderer(renderer);
mRenderer.addSeriesRenderer(rendererB);
mRenderer.addSeriesRenderer(rendererD);

mChartView.repaint();

知道可能导致这种不稳定行为的原因吗？

编辑：@keshav这是我在我的视图中添加mChartView的地方

@Override
protected void onResume() {
    super.onResume();
    if (mChartView == null) {
        LinearLayout layout = (LinearLayout) findViewById(R.id.chartProgress);
        mChartView = ChartFactory.getLineChartView(this, mDataset, mRenderer);
        // enable the chart click events
        mRenderer.setSelectableBuffer(10);
        mChartView.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // handle the click event on the chart
                SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
                if (seriesSelection == null) {
                    Toast.makeText(ProgressChart.this, "No chart element", Toast.LENGTH_SHORT).show();
                } else {
                    // display information of the clicked point
                    Toast.makeText(
                            ProgressChart.this,
                            "Chart element in series index " + seriesSelection.getSeriesIndex()
                            + " data point index " + seriesSelection.getPointIndex() + " was clicked"
                            + " closest point value X=" + seriesSelection.getXValue() + ", Y="
                            + seriesSelection.getValue(), Toast.LENGTH_SHORT).show();
                }
            }
        });
        layout.addView(mChartView, new LayoutParams(LayoutParams.FILL_PARENT,
                LayoutParams.FILL_PARENT));
        boolean enabled = mDataset.getSeriesCount() > 0;
    } else {
        mChartView.repaint();
    }
}

编辑：以前我没有提到过两个线性布局。一个布局包含图表（首先隐藏）。第二个布局包含日期选择器。当我触摸到日期选择器中的空位时，问题就出现了。线性布局然后当我按下按钮来改变线性布局时，空白图表就会发生。如果我只触摸日期选择器而不是空白空间，那么图表就可以了。

图表随机不使用achartengine android绘制

0 个答案: