Question

我有一个代码，其中的图像将显示在ViewPager上，图像将来自服务器。我正在使用Glide库，但是当我使用它时，如果服务器端没有图像，那么它默认会显示一个图像，但进度条会一直运行，直到我们返回或关闭应用程序。以下是我的代码，请检查一下。

public class SlidingImage_Adapter extends PagerAdapter {
private ArrayList<String> IMAGES;
private LayoutInflater layoutInflater;
private Context context;
ProgressBar progressBar;
private ImageLoader imageLoader;

SessionManager session;
public String string_gender;

public SlidingImage_Adapter(Context context, ArrayList<String> IMAGES) {
    this.context = context;
    this.IMAGES=IMAGES;
}


@Override
public Object instantiateItem(ViewGroup view, int position) {
    //  ImageView imageLayout = (ImageView) inflater.inflate(R.layout.screen_slide_fragment, view, false);
    layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View item_view = layoutInflater.inflate(R.layout.screen_slide_fragment, view, false);
    ImageView imageView = (ImageView) item_view.findViewById(R.id.image);

    // Session class instance
    session = new SessionManager(context);
    session.checkLogin();
    // get user data from session
    HashMap<String, String> user = session.getUserDetails();
    string_gender = user.get(SessionManager.KEY_GENDER);



    ProgressBar spinner = (ProgressBar) item_view.findViewById(R.id.progressBar);

    //This will help to load image and show progressBar
    imageLoader = new ImageLoader(imageView, spinner, IMAGES.get(position));

    //you need to add this line
    view.addView(item_view);

    return item_view;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    container.removeView((View) object);
}

@Override
public int getCount() {
    return IMAGES.size();
}


@Override
public boolean isViewFromObject(View view, Object object) {
    return view.equals(object);

}

@Override
public void restoreState(Parcelable state, ClassLoader loader) {
}

@Override
public Parcelable saveState(){
    return null;
}



public class ImageLoader{

    public ImageLoader(ImageView imageView, final ProgressBar progressBar, String imagePath){


        if(string_gender.equalsIgnoreCase("male"))
        {
            Glide.with(context)
                    .load(imagePath)
                    .placeholder(R.drawable.girl)
                    .listener(new RequestListener<String, GlideDrawable>() {

                        @Override
                        public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
                            //handle error
                            return false;
                        }

                        @Override
                        public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                            progressBar.setVisibility(View.GONE);
                            return false;
                        }
                    }).into(imageView);
        }
        else{
            Glide.with(context)
                    .load(imagePath)
                    .placeholder(R.drawable.boy)
                    .listener(new RequestListener<String, GlideDrawable>() {
                        @Override
                        public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
                            //handle error
                            return false;
                        }

                        @Override
                        public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                            progressBar.setVisibility(View.GONE);
                            return false;
                        }
                    }).into(imageView);
                }
              }
            }
           }

Answer 1

在你的GlideListener onException方法实现中的

在你的条件中添加这一行：

 @Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
     progressBar.setVisibility(View.GONE);
     return false;
                            }

Answer 2

在资源准备

中尝试此内容

if (imageView.getDrawable().getConstantState() == getResources().getDrawable( R.drawable.girl).getConstantState())
    progressBar.setVisibility(View.VISIBLE);
else
    progressBar.setVisibility(View.GONE);

使用Glade库获取占位符图像后，进度条正在运行

2 个答案: