[英]Error loading image url with Glide
我想要做的是使用图像 url 显示图像,我正在使用 glide 库来加载这些图像,但是每当我尝试运行应用程序时,图像都无法显示或不会加载到活动中。 我能够看到正在显示的文本但看不到图像
这是我得到的错误
java.lang.IllegalArgumentException: You cannot start a load on a null Context
11-11 03:23:01.713 5428-5428/? W/System.err: at com.bumptech.glide.manager.RequestManagerRetriever.get(RequestManagerRetriever.java:84)
11-11 03:23:01.713 5428-5428/? W/System.err: at com.bumptech.glide.Glide.with(Glide.java:629)
这是代码
public class SampleAdapter extends RecyclerView.Adapter <SampleAdapter.ViewHolder> {
private List<SampleModel> list;
private Context mContext = null;
public SampleAdapter(List<SampleModel> sampleModelList) {
this.list = sampleModelList;
}
@Override
public SampleAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.sample_item, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(WatchlistAdapter.ViewHolder holder, int position) {
String image = "https://image.tmdb.org/t/p/w500/9HE9xiNMEFJnCzndlkWD7oPfAOx.jpg";
try{
final SampleModel sample = list.get(holder.getAdapterPosition());
if(sample != null) {
holder.title.setText(sample.getTitle());
Glide.with(mContext).load(image)
.placeholder(R.drawable.placeholder)
.dontAnimate()
.fitCenter()
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(holder.cover);
} else {
Glide.clear(holder.cover);
}
} catch(Exception e) {
e.printStackTrace();
}
}
@Override
public int getItemCount() {
return (list != null? list.size():0);
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView title;
public ImageView cover;
public ViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.title);
cover= (ImageView) itemView.findViewById(R.id.coverImage);
}
}
做这个 :
public SampleAdapter(List<SampleModel> sampleModelList, Context context) {
this.list = sampleModelList;
mContext = context ;
}
在这之前 :
Glide.with(mContext).load(image)
.placeholder(R.drawable.placeholder)
.dontAnimate()
.fitCenter()
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(holder.cover);
mContext 未分配任何上下文值。 它仍然具有您初始化的值(即空值)。 因此,您需要按照@Kapta 的建议分配其值,并在 SampleAdapter 构造函数中将上下文作为参数传递。
实际上,只要您的 ImageView holder.cover
不为null
,您就可以方便地使用holder.cover.getContext()
。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.