69、Android 布局中轻松实现图片的全屏、居中、平铺

   public void paint() {
         if (item.laying_mode != 1)//平铺或者充满
         {
             new AsyncTask<Void, Void, Void>() {
                 @Override
                 protected Void doInBackground(Void... params) {
                     Looper.prepare();
                     try {
                         theBitmap = Glide.
                                 with(ctxt).
                                 load(item.src).
                                 asBitmap().
                                 into(fenbianlv[0], fenbianlv[1]).
                                 get();
                     } catch (final ExecutionException e) {
                         Log.e(TAG, e.getMessage());
                     } catch (final InterruptedException e) {
                         Log.e(TAG, e.getMessage());
                     }
                     return null;
                 }

                 @Override
                 protected void onPostExecute(Void dummy) {
                     if (null != theBitmap) {
                         // The full bitmap should be available here

                         BitmapDrawable bd = new BitmapDrawable(Resources.getSystem(),theBitmap);
                         if (item.laying_mode == 0)//充满（默认值，缩放到图片全部充满屏幕
                         {
                         } else if (item.laying_mode == 2)//平铺（从左上开始，一个一个的平铺）
                         {
                             bd.setTileModeXY(Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
                         }
                         rl.setBackground(bd);
                     }
                 }
             }.execute();
         }
         else//1：居中（图片按照原始大小，放到屏幕中间)
         {
             new AsyncTask<Void, Void, Void>() {
                 @Override
                 protected Void doInBackground(Void... params) {
                     Looper.prepare();
                     try {
                         String imageUrl = item.src;
                         theBitmap= BitmapFactory.decodeStream((InputStream) new URL(imageUrl).getContent());
                     } catch (final Exception e) {
                         Log.e(TAG, e.getMessage());
                     }
                     return null;
                 }

                 @Override
                 protected void onPostExecute(Void dummy) {
                     if (null != theBitmap) {
                         iv.setImageBitmap(theBitmap);
                     }
                 }
             }.execute();
         }
     }

一下三种分别是充满、平铺、居中(按图片原始大小)