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我想在Android的ImageView上显示Canvas内容,Canvas在Android中的ImageView问题
但ImageView显示空白。
Bitmap imgBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.image);
Canvas canvas = new Canvas();
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
canvas.drawBitmap(imgBitmap, 0, 0, paint);
paint.setColor(Color.BLACK);
paint.setAlpha(100);
canvas.drawRect(0, 0, 100, 100, paint); // transparent black on image
imgView.draw(canvas);
是什么问题?我该怎么办?
感谢您的回答。 '位图位图= Bitmap.createBitmap(宽度,高度,Bimap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); ... imgView.setImageBitmap(bitmap);' – musa