图片库Adapter

需要时集成接口 IWXImgLoaderAdapter，实现 setImage 方法。

示例如下：

public class ImageAdapter implements IWXImgLoaderAdapter {

  public ImageAdapter() {
  }

  @Override
  public void setImage(final String url, final ImageView view,
                       WXImageQuality quality, WXImageStrategy strategy) {

    WXSDKManager.getInstance().postOnUiThread(new Runnable() {

      @Override
      public void run() {
        if(view==null||view.getLayoutParams()==null){
          return;
        }
        if (TextUtils.isEmpty(url)) {
          view.setImageBitmap(null);
          return;
        }
        String temp = url;
        if (url.startsWith("//")) {
          temp = "http:" + url;
        }
        if (view.getLayoutParams().width <= 0 || view.getLayoutParams().height <= 0) {
          return;
        }
        Picasso.with(WXEnvironment.getApplication())
            .load(temp)
            .into(view);
      }
    },0);
  }
}