Android 圖片高期模糊處理

調這一個方法搞定：：：

/**
 * 圖片模糊
 *
 * @param bitmap
 * @return
 */
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
@RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
public Bitmap blurBitmap(Bitmap bitmap) {

    //Let's create an empty bitmap with the same size of the bitmap we want to blur
    Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);

    //Instantiate a new Renderscript
    RenderScript rs = RenderScript.create(getActivity());

    //Create an Intrinsic Blur Script using the Renderscript
    ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));

    //Create the Allocations (in/out) with the Renderscript and the in/out bitmaps
    Allocation allIn = Allocation.createFromBitmap(rs, bitmap);
    Allocation allOut = Allocation.createFromBitmap(rs, outBitmap);

    //Set the radius of the blur
    blurScript.setRadius(25.f);

    //Perform the Renderscript
    blurScript.setInput(allIn);
    blurScript.forEach(allOut);

    //Copy the final bitmap created by the out Allocation to the outBitmap
    allOut.copyTo(outBitmap);

    //recycle the original bitmap
    bitmap.recycle();

    //After finishing everything, we destroy the Renderscript.
    rs.destroy();

    return outBitmap;


}