android come disegnare una bitmap su tela semi trasparente

Question

Ho provato a modificare una variabile Paint, ma non ho avuto successo - come posso far apparire una bitmap "semi-trasparente"?

Answer 1

canvas.drawColor(Color.WHITE); 
BitmapDrawable bd = (BitmapDrawable) getResources().getDrawable(R.drawable.loading);  
Bitmap bm = bd.getBitmap();  
Paint paint = new Paint();  
paint.setAlpha(60);        //you can set your transparent value here  
canvas.drawBitmap(bm, 0, 0, paint); 

Answer 2

Paint p = new Paint(); 
p.setAlpha(70); 

Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.wallpaper); 
canvas.drawBitmap(image, xPosition, yPosition, p);