Caused by: java.lang.IllegalStateException: Immutable bitmap passed to Canvas constructor

            Bitmap bmp =BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);  

            Paint paint = new Paint();

            paint.setColor(Color.BLACK);

            String str = "123";

            Canvas canvas = new Canvas(bmp);　　　　//此句报错

            canvas.drawText(str, 0, 0, paint);

不允许直接修改res里面的图片，只要在后面加上.copy(Bitmap.Config.ARGB_8888, true);

 

修改后：

Bitmap  originalBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.a).copy(Bitmap.Config.ARGB_8888, true);