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);    }

 <eightbitlab.com.blurview.BlurView   android:id="@+id/blurView"   android:layout_width="match_parent"   android:layout_height="wrap_content"   app:blurOverlayColor="@color/colorOverlay">    <!--Any child View here, TabLayout for example--> </eightbitlab.com.blurview.BlurView>