Question

I am trying to render a canvas drawn bitmap onto an ImageView in an App Widget. Unable to get that working, I am trying a simpler example, without the RemoteViews object, so just trying to render some rectangles into a canvas, and then set that on the ImageView. I just see a blank activity. Here is the code sample:

LinearLayout layout = new LinearLayout (this);
layout.setDrawingCacheEnabled(true);
try
{
    Bitmap bitmap = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888); 
    Canvas canvas = new Canvas(bitmap);
    Paint red = new Paint ();
    red.setColor(0xCC0000);
    Paint blue = new Paint ();
    blue.setColor (0x0099CC);
    canvas.drawRect(0, 0, 100, 100, red);
    int percent = 55;
    canvas.drawRect(0, 0, percent, 100, blue);
    ImageView imageView = new ImageView (this);
    imageView.setDrawingCacheEnabled(true);
    imageView.setImageBitmap(bitmap);
    imageView.setAdjustViewBounds(true);
    imageView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
              LayoutParams.WRAP_CONTENT));
    layout.addView(imageView);

}
catch(Exception e)
{
    Log.e("ElectionForecastWidgetProvider", "error with bar", e);
}
this.setContentView(layout);

I’ve been tweaking various parts, such as trying out the setDrawingCacheEnabled method, after searching on stack overlow and in other places. Can anyone offer any insight here? Thanks!

Answer 1

Colors are presented in ARGB format, try changing them to;

...
red.setColor(0xFFCC0000);
...
blue.setColor (0xFF0099CC);
...