Android实现图片转高斯模糊以及高斯模糊布局

 public static void updateBgToBlur(Activity a, Bitmap bmpToBlur, View view, int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inJustDecodeBounds = true; opt.inSampleSize = 8; opt.inJustDecodeBounds = false; Bitmap bmp = BitmapFactory.decodeResource(a.getResources(), resId, opt); if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN) { view.setBackground(null); } else { view.setBackgroundDrawable(null); } if (bmpToBlur != null && !bmpToBlur.isRecycled()) { bmpToBlur.recycle(); } bmpToBlur = blurBitmap(a, bmp); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { view.setBackground(new BitmapDrawable(a.getResources(), bmpToBlur)); } else { view.setBackgroundDrawable(new BitmapDrawable(a.getResources(), bmpToBlur)); } } public static Bitmap blurBitmap(Context c, 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_4444); //Instantiate a new Renderscript RenderScript rs = RenderScript.create(c.getApplicationContext()); //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; } 

 Bitmap bitmap=null; if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT) { ImageUtil.updateBgToBlur(getActivity(), bitmap, slidingUpPanelLayout, R.drawable.bg_tageditor); } else { slidingUpPanelLayout.setBackgroundResource(R.drawable.bg_tageditor); } 

 compile 'com.eightbitlab:supportrenderscriptblur:1.0.0' compile 'com.eightbitlab:blurview:1.3.3' defaultConfig { renderscriptTargetApi 25 //must match target sdk and build tools, 23+ renderscriptSupportModeEnabled true } 

 final float radius = 20; final View decorView = getActivity().getWindow().getDecorView(); //Activity's root View. Can also be root View of your layout (preferably) final ViewGroup rootView = (ViewGroup) decorView.findViewById(android.R.id.content); //set background, if your root layout doesn't have one final Drawable windowBackground = decorView.getBackground(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { mBlurView.setupWith(rootView) .windowBackground(windowBackground) .blurAlgorithm(new RenderScriptBlur(getActivity())) .blurRadius(radius); }else { mBlurView.setupWith(rootView) .windowBackground(windowBackground) .blurAlgorithm(new SupportRenderScriptBlur(getActivity())) .blurRadius(radius); }