public class MainActivity extends AppCompatActivity implements ContentManager.PickContentListener {

/**
* Success result callback
*
* @param uri         Content uri
* @param contentType If you pick content can be Image or Video, if take only Image
*/
@Override
public void onContentLoaded(Uri uri, String contentType) {
  if (contentType.equals(ContentManager.Content.IMAGE.toString())) {
    //You can use any library for display image: Fresco, Picasso, ImageLoader and etc.
    //For sample:
    ImageLoader.getInstance().displayImage(uri.toString(), ivPicture);
  } else {
    //handle video if needed
  }
}
        
/**
* Return progress of load content from cloud
*
* @param loadPercent load progress in percent
*/
@Override
public void onLoadContentProgress(int loadPercent) {
  //Show loader or something like that
}

/**
* Call if have some problem with getting content
*
* @param error message
*/
@Override
public void onError(String error) {
  //Show error
}

/**
* Call if user manual cancel picking or taking content
*/
@Override
public void onCanceled() {
  //User canceled
}

private ContentManager contentManager;

contentManager = new ContentManager(this, this);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  contentManager.onActivityResult(requestCode, resultCode, data);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
  super.onRestoreInstanceState(savedInstanceState);
  contentManager.onRestoreInstanceState(savedInstanceState);
}

@Override
protected void onSaveInstanceState(Bundle outState) {
  super.onSaveInstanceState(outState);
  contentManager.onSaveInstanceState(outState);
}

contentManager.pickContent(ContentManager.Content.IMAGE);