Android Drawable转换为Bitmap

public static Bitmap drawableToBitmap(Drawable drawable) {try {Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight(),drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888: Bitmap.Config.RGB_565);Canvas canvas = new Canvas(bitmap);// canvas.setBitmap(bitmap);drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());drawable.draw(canvas);return bitmap;} catch (OutOfMemoryError e) {e.printStackTrace();return null;}}