android里面meum的写法

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 //MENU
 @Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
  inflater.inflate(R.menu.preview\_line\_chart, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
  int id = item.getItemId();
  if (id == R.id.action\_reset) {
    generateDefaultData();
    chart.setLineChartData(data);
    previewChart.setLineChartData(previewData);
    previewX(true);
    return true;
  }
  if (id == R.id.action\_preview\_both) {
    previewXY();
    previewChart.setZoomType(ZoomType.HORIZONTAL\_AND\_VERTICAL);
    return true;
  }
  if (id == R.id.action\_preview\_horizontal) {
    previewX(true); return true;
  }
  if (id == R.id.action\_preview\_vertical) {
    previewY(); return true;
  }
  if (id == R.id.action\_change_color) {
    int color = ChartUtils.pickColor();
    while (color == previewChart.getPreviewColor()) {
      color = ChartUtils.pickColor();
    }
    previewChart.setPreviewColor(color); return true;
  }
  return super.onOptionsItemSelected(item);
}