Android 图片处理缩放功能

<ImageView
    android:layout_width="match_parent"
    android:layout_height="300dp"
    android:id="@+id/id_loc"
    android:scaleType="fitXY"
    />
<uk.co.senab.photoview.PhotoView
    android:layout_width="match_parent"
    android:layout_height="400dp"
    android:src="@mipmap/ic_launcher"
    android:id="@+id/id_myimg"/>

 //本地加载方法一
    // 设置图片
    Drawable bitmap = getResources().getDrawable(R.mipmap.ic_launcher);
    loc.setImageDrawable(bitmap);
    // 连接在photoview中
    PhotoViewAttacher mAttacher = new PhotoViewAttacher(loc);
    mAttacher.update();//更新 

//本地方法加载二
    PhotoViewAttacher mAttacher;
    mAttacher = new PhotoViewAttacher(loc);
    iv.setImageBitmap(bitmap);
    Glide.with(this).load(R.mipmap.ic_launcher).asBitmap().into(loc);
    mAttacher.update();

//加载网络图片
    ImageLoader loader= ImageLoader.getInstance();
    loader.init(ImageLoaderConfiguration.createDefault(ImageTest.this));//loader初始化
    loader.displayImage("https://ss0.bdstatic.com/94oJfD_bAAcT8t7mm9GUKT-xh_/timg?image&quality=100&size=b4000_4000&sec=1529211252&di=1414331e22239ecb5730cbbd0f3793eb&src=http://pic154.nipic.com/file/20180114/26629113_090329120799_2.jpg",loc);//展示图片

/**
   * Adds display image task to execution pool. Image will be set to ImageView when it's turn. <br/>
   * Default {@linkplain DisplayImageOptions display image options} from {@linkplain ImageLoaderConfiguration
   * configuration} will be used.<br />
   * <b>NOTE:</b> {@link #init(ImageLoaderConfiguration)} method must be called before this method call
   *
   * @param uri    Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
   * @param imageView {@link ImageView} which should display image
   * @throws IllegalStateException  if {@link #init(ImageLoaderConfiguration)} method wasn't called before
   * @throws IllegalArgumentException if passed <b>imageView</b> is null
   */
  public void displayImage(String uri, ImageView imageView) {
    displayImage(uri, new ImageViewAware(imageView), null, null, null);
  }