/*
本程序中大概耗时为20-30毫秒
*/
private Bitmap blurBitmap(Bitmap bitmap, int radius) {
RenderScript rs = RenderScript.create(this);
Allocation overlayAlloc = Allocation.createFromBitmap(rs, bitmap);
ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, overlayAlloc.getElement());
blur.setInput(overlayAlloc);
blur.setRadius(radius);
blur.forEach(overlayAlloc);
overlayAlloc.copyTo(bitmap);
rs.destroy();
return bitmap;
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
@Override
protected Bitmap blur(Bitmap bitmap, int radius) {
RenderScript rs = RenderScript.create(getActivity());
Allocation overlayAlloc = Allocation.createFromBitmap(rs, bitmap);
ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, overlayAlloc.getElement());
blur.setInput(overlayAlloc);
blur.setRadius(radius);
blur.forEach(overlayAlloc);
overlayAlloc.copyTo(bitmap);
rs.destroy();
return bitmap;
}