Question

我想在用户单击回收器视图项中存在的按钮时发送POST请求。当用户单击按钮时，我正在使用OkHttp3发出网络请求，我正在向节点服务器发送POST请求。我的问题是在OkHttp3的OnResponse调用中，我无法定义runOnUiThread（）方法。

这是我到目前为止所做的：

MyPostedBookAdapter.java

public class MyPostedBookAdapter extends RecyclerView.Adapter<MyPostedBookAdapter.ViewHolder> {

List<PostedModel> listItem;
Context context;
String id;
private static final String URI = "https:bookbudiapp.herokuapp.com/deleteRow";

public MyPostedBookAdapter(List<PostedModel> listItem, Context context){

    this.listItem = listItem;
    this.context = context;
}

@NonNull
@Override
public MyPostedBookAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {

    View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.posted_book,viewGroup,false);


    return new ViewHolder(v);
}

@Override
public void onBindViewHolder(@NonNull final MyPostedBookAdapter.ViewHolder viewHolder, final int i) {

    final PostedModel model =  listItem.get(i);

    id = model.getPostId();

    viewHolder.userBookName.setText(model.getPurchaseBookName());

    RequestOptions requestOptions = new RequestOptions();
    requestOptions.placeholder(R.drawable.openbook);

    Glide.with(context).load(model.getPurchaseImage()).apply(requestOptions).into(viewHolder.userPostBook);

    viewHolder.delete.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            Toast.makeText(context,id,Toast.LENGTH_SHORT).show();

            deleteRow();

        }
    });
}

@Override
public int getItemCount() {
    return listItem.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {

    ImageView userPostBook;
    TextView userBookName;
    Button delete;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);

        userPostBook = (itemView).findViewById(R.id.userPostBook);
        userBookName = (itemView).findViewById(R.id.userBookName);
        delete = (itemView).findViewById(R.id.delete);
    }
}

private void deleteRow(){

    OkHttpClient client = new OkHttpClient.Builder()
                              .connectTimeout(20, TimeUnit.SECONDS)
                              .readTimeout(20,TimeUnit.SECONDS)
                              .writeTimeout(20, TimeUnit.SECONDS)
                              .build();

    RequestBody formBody = new FormBody.Builder().add("postId",id).build();

    Request request = new Request.Builder().url(URI).post(formBody).build();

    client.newCall(request).enqueue(new Callback() {

        @Override
        public void onResponse(Call call, Response response) throws IOException {


        }

        @Override
        public void onFailure(Call call, IOException e) {

        }

    });

  }
}

让我知道如何在响应调用中定义runOnUiThread（）方法。任何帮助将不胜感激。

谢谢

Answer 1

通过您的活动上下文，您可以在适配器类中调用runOnUiThread（）。

Answer 2

通过观察您在此处发布的代码，您要在删除数据后更新UI（RecyclerView上的“ Particuler Row”）。是吗？

您将使用 MyPostedBookAdapter.java 上的Okhttp将日期发送到节点服务器。现在，更新到UI，您必须在Adaper行onResponse（）方法上通知notifydatasetChanged。编写此代码。希望对您有帮助。

private void deleteRow(){

    OkHttpClient client = new OkHttpClient.Builder()
                              .connectTimeout(20, TimeUnit.SECONDS)
                              .readTimeout(20,TimeUnit.SECONDS)
                              .writeTimeout(20, TimeUnit.SECONDS)
                              .build();

    RequestBody formBody = new FormBody.Builder().add("postId",id).build();

    Request request = new Request.Builder().url(URI).post(formBody).build();

    client.newCall(request).enqueue(new Callback() {

        @Override
        public void onResponse(Call call, Response response) throws IOException {
        // To remome row from recyclerView Row(item).
        arrayList.remove(position);
        notifyItemRemoved(position);
        notifyItemRangeChanged(position, arrayList.size());
        }

        @Override
        public void onFailure(Call call, IOException e) {

        }

    });

  }

position 是特定行（项目）的位置。要获取Position，可以使用 getAdapterPosition（）方法。

position=ViewHolder.getAdapterPosition()

这里有任何查询评论。这对我有帮助。希望对您有帮助。谢谢...

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2 个答案: