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)