andriod 的bitmap OutOfMemoryError

OutOfMemoryError

BitmapDrawable bd ＝ (BitmapDrawable)mBtn.getBackground();

mBtn.setBackgroundResource(0);//别忘了把背景设为null，避免onDraw刷新背景时候出现used a recycled bitmap错误

bd.setCallback(null);
bd.getBitmap().recycle();