Android图片处理--缩放

<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);
	}