Android 高斯模糊

/**
     * 獲取網絡類型
     */
    public static void blurBgPic(final Context context, final ImageView view, final String url, int defResId) {
        try {
        if (context == null || view == null) {
            return;
        }

        if (TextUtils.isEmpty(url)) {
            Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), defResId);
            int scaleRatio = 10;
//                            int blurRadius = 8;
            Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap,
                    bitmap.getWidth() / scaleRatio,
                    bitmap.getHeight() / scaleRatio,
                    false);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                view.setImageBitmap(blurBitmap(scaledBitmap, context.getApplicationContext()));
            }else{
                view.setImageBitmap(scaledBitmap);
            }
        } else {
            Glide.with(context.getApplicationContext())
                    .load(url)
                    .asBitmap()
                    .into(new SimpleTarget<Bitmap>(Target.SIZE_ORIGINAL,Target.SIZE_ORIGINAL) {
                        @Override
                        public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
                            if (resource == null) {
                                return;
                            }

                            int scaleRatio = 10;
//                            int blurRadius = 8;
                            Bitmap scaledBitmap = Bitmap.createScaledBitmap(resource,
                                    resource.getWidth() / scaleRatio,
                                    resource.getHeight() / scaleRatio,
                                    false);
//                            Bitmap blurBitmap = FastBlur.doBlur(scaledBitmap, blurRadius, true);
//                            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
//                            imageView.setImageBitmap(blurBitmap);

                            Bitmap bitmap = null;
                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                                bitmap = blurBitmap(scaledBitmap, context.getApplicationContext());
                            }else{
                                bitmap = scaledBitmap;
                            }
                            final Bitmap finalBitmap = bitmap;
                            view.post(new Runnable() {
                                @Override
                                public void run() {
                                    view.setImageBitmap(finalBitmap);
                                }
                            });
                        }
                    });
        }
        }catch (OutOfMemoryError e){

        }
    }
//    /**

    private static Bitmap blurBitmap(Bitmap resource, Context context) {
//        Matrix matrix = new Matrix();
//        matrix.setScale(0.5f,0.5f);
        Bitmap bitmap = Bitmap.createBitmap(resource.getWidth(), resource.getHeight(), Bitmap.Config.ARGB_8888);
//        Bitmap bitmap = Bitmap.createBitmap(bitmapp,0,0,bitmapp.getWidth(),bitmapp.getHeight(),matrix,true);

        Canvas canvas = new Canvas(bitmap);
        Paint paint = new Paint();
        paint.setFlags(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG);
        PorterDuffColorFilter filter =
                new PorterDuffColorFilter( Color.TRANSPARENT, PorterDuff.Mode.SRC_ATOP);
        paint.setColorFilter(filter);
        canvas.drawBitmap(resource, 0, 0, paint);

        RenderScript rs = RenderScript.create(context.getApplicationContext());
        Allocation input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_NONE,
                Allocation.USAGE_SCRIPT);
        Allocation output = Allocation.createTyped(rs, input.getType());
        ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));

        blur.setInput(input);
        blur.setRadius(10);
        blur.forEach(output);
        output.copyTo(bitmap);
        rs.destroy();

        return bitmap;
    }