Android画像の重ね合わせ効果を実現

方法1:

Bitmap bitmap1 = ((BitmapDrawable) info.icon).getBitmap();
Bitmap bitmap2 = ((BitmapDrawable) getResources()
.getDrawable(R.drawable.ic_assistive_touch_refresh)).getBitmap();

Drawable[] array = new Drawable[2];
array[0] = new BitmapDrawable(bitmap1);
array[1] = new BitmapDrawable(bitmap2);
LayerDrawable la = new LayerDrawable(array);
ShortcutsSetting.setImageDrawable(la);

 
  
方法二：
 
   
  
//     Immutable bitmap passed to Canvas constructor  
Bitmap bitmap1 = BitmapFactory.decodeResource(getResources(),
R.drawable.apple).copy(Bitmap.Config.ARGB_8888, true);
Bitmap bitmap2 = ((BitmapDrawable) getResources().getDrawable(
R.drawable.go)).getBitmap();

Bitmap newBitmap = null;

newBitmap = Bitmap.createBitmap(bitmap1);
Canvas canvas = new Canvas(newBitmap);
Paint paint = new Paint();

int w = bitmap1.getWidth();
int h = bitmap1.getHeight();

int w_2 = bitmap2.getWidth();
int h_2 = bitmap2.getHeight();

paint.setColor(Color.GRAY);
paint.setAlpha(125);
canvas.drawRect(0, 0, bitmap1.getWidth(), bitmap1.getHeight(), paint);

paint = new Paint();
canvas.drawBitmap(bitmap2, Math.abs(w - w_2) / 2,
Math.abs(h - h_2) / 2, paint);
canvas.save(Canvas.ALL_SAVE_FLAG);
//         
canvas.restore();

image.setImageBitmap(newBitmap);