Android api的回收器视图中未显示数据_Android_Rx Java2_Retrofit2.6

Android api的回收器视图中未显示数据

android

Android api的回收器视图中未显示数据,android,rx-java2,retrofit2.6,Android,Rx Java2,Retrofit2.6,我正在尝试从服务器获取数据并在recycler视图中显示它。我正在使用翻新库和RxJava2，但它无法从服务器获取数据其在LogCat中显示以下行： E/RecyclerView: No adapter attached; skipping layout 来自服务器的响应： [ { "term_id": "4", "name": "Entertainment" }, { "term_id": "5", "name": "Tech &

我正在尝试从服务器获取数据并在recycler视图中显示它。我正在使用翻新库和RxJava2，但它无法从服务器获取数据

其在LogCat中显示以下行：

E/RecyclerView: No adapter attached; skipping layout

来自服务器的响应：

[
  {
    "term_id": "4",
    "name": "Entertainment"
  },
  {
    "term_id": "5",
    "name": "Tech &amp; Gadgets"
  },
  {
    "term_id": "6",
    "name": "Sports"
  },
  {
    "term_id": "7",
    "name": "Health and Fitness Tips"
  }
]

下面是我的代码：

client.java

public class RetrofitClient {

private static Retrofit retrofit = null;

public static Retrofit getInstance(){


    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .connectTimeout(22,TimeUnit.SECONDS)
            .readTimeout(22, TimeUnit.SECONDS)
            .writeTimeout(22, TimeUnit.SECONDS)
            .build();

    if(retrofit == null)
        retrofit = new Retrofit.Builder()
                .baseUrl("https://www.flypped.com/api/")
                .addConverterFactory(GsonConverterFactory.create(new GsonBuilder().setLenient().create()))
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .client(okHttpClient)
                .build();

    return retrofit;

  }

}

public class Model {

@SerializedName("catId")
@Expose
String catId;

@SerializedName("catName")
@Expose
String catName;

public Model(){

}

public Model(String catId, String catName) {
    this.catId = catId;
    this.catName = catName;
}

public String getCatId() {
    return catId;
}

public void setCatId(String catId) {
    this.catId = catId;
}

public String getCatName() {
    return catName;
}

public void setCatName(String catName) {
    this.catName = catName;
}

}

private void fetchData(){

    Retrofit retrofit = RetrofitClient.getInstance();
    ApiService myApi = retrofit.create(ApiService.class);

     myApi.getData().subscribeOn(Schedulers.io())
                                           .observeOn(AndroidSchedulers.mainThread())
                                           .subscribe(new Observer<List<Model>>() {
                                               @Override
                                               public void onSubscribe(Disposable d) {
                                                   d.dispose();
                                               }

                                               @Override
                                               public void onNext(List<Model> models) {

                                                   if(models.size() > 0){

                                                       progress.setVisibility(View.INVISIBLE);

                                                      adapter = new PostAdapter(getApplicationContext(),list);
                                                       recycler.setAdapter(adapter);
                                                   }
                                               }

                                               @Override
                                               public void onError(Throwable e) {

                                                   Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_SHORT).show();
                                               }

                                               @Override
                                               public void onComplete() {


                                               }
                                           });

                           }

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

List<Model> list = new ArrayList<>();
Context context;

public PostAdapter(Context context,List<Model> list) {
    this.context = context;
    this.list = list;
}

@NonNull
@Override
public PostAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_row,parent,false);

    ViewHolder view = new ViewHolder(v);
    return view;
}

@Override
public void onBindViewHolder(@NonNull PostAdapter.ViewHolder holder, int position) {

    Model model = list.get(position);

    holder.catName.setText(model.getCatName());
    holder.catId.setText(model.getCatId());
}

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

public class ViewHolder extends RecyclerView.ViewHolder {

    TextView catId,catName,comp,titl;

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

        catId = itemView.findViewById(R.id.catId);
        catName = itemView.findViewById(R.id.catName);
    }
  }
}

ApiService.class

public interface ApiService {

@GET("Categoery_api")
Observable<List<Model>> getData();
}

MainActivity.java

public class RetrofitClient {

private static Retrofit retrofit = null;

public static Retrofit getInstance(){


    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .connectTimeout(22,TimeUnit.SECONDS)
            .readTimeout(22, TimeUnit.SECONDS)
            .writeTimeout(22, TimeUnit.SECONDS)
            .build();

    if(retrofit == null)
        retrofit = new Retrofit.Builder()
                .baseUrl("https://www.flypped.com/api/")
                .addConverterFactory(GsonConverterFactory.create(new GsonBuilder().setLenient().create()))
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .client(okHttpClient)
                .build();

    return retrofit;

  }

}

public class Model {

@SerializedName("catId")
@Expose
String catId;

@SerializedName("catName")
@Expose
String catName;

public Model(){

}

public Model(String catId, String catName) {
    this.catId = catId;
    this.catName = catName;
}

public String getCatId() {
    return catId;
}

public void setCatId(String catId) {
    this.catId = catId;
}

public String getCatName() {
    return catName;
}

public void setCatName(String catName) {
    this.catName = catName;
}

}

private void fetchData(){

    Retrofit retrofit = RetrofitClient.getInstance();
    ApiService myApi = retrofit.create(ApiService.class);

     myApi.getData().subscribeOn(Schedulers.io())
                                           .observeOn(AndroidSchedulers.mainThread())
                                           .subscribe(new Observer<List<Model>>() {
                                               @Override
                                               public void onSubscribe(Disposable d) {
                                                   d.dispose();
                                               }

                                               @Override
                                               public void onNext(List<Model> models) {

                                                   if(models.size() > 0){

                                                       progress.setVisibility(View.INVISIBLE);

                                                      adapter = new PostAdapter(getApplicationContext(),list);
                                                       recycler.setAdapter(adapter);
                                                   }
                                               }

                                               @Override
                                               public void onError(Throwable e) {

                                                   Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_SHORT).show();
                                               }

                                               @Override
                                               public void onComplete() {


                                               }
                                           });

                           }

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

List<Model> list = new ArrayList<>();
Context context;

public PostAdapter(Context context,List<Model> list) {
    this.context = context;
    this.list = list;
}

@NonNull
@Override
public PostAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_row,parent,false);

    ViewHolder view = new ViewHolder(v);
    return view;
}

@Override
public void onBindViewHolder(@NonNull PostAdapter.ViewHolder holder, int position) {

    Model model = list.get(position);

    holder.catName.setText(model.getCatName());
    holder.catId.setText(model.getCatId());
}

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

public class ViewHolder extends RecyclerView.ViewHolder {

    TextView catId,catName,comp,titl;

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

        catId = itemView.findViewById(R.id.catId);
        catName = itemView.findViewById(R.id.catName);
    }
  }
}

private void fetchData（）{
Refundation-Refundation=RefundationClient.getInstance（）；
ApiService myApi=reformation.create（ApiService.class）；
myApi.getData（）.subscribeOn（Schedulers.io（））
.observeOn（AndroidSchedulers.mainThread（））
.订阅（新观察员）{
@凌驾
认购的公共无效（一次性d）{
d、 处置（）；
}
@凌驾
public void onNext（列出型号）{
如果（models.size（）>0）{
progress.setVisibility（View.INVISIBLE）；
适配器=新的后适配器（getApplicationContext（），列表）；
回收器。设置适配器（适配器）；
}
}
@凌驾
公共无效申报人（可丢弃的e）{
Toast.makeText（getApplicationContext（），e.getMessage（），Toast.LENGTH_SHORT）.show（）；
}
@凌驾
未完成的公共空间（）{
}
});
}

PostAdapter.java

public class RetrofitClient {

private static Retrofit retrofit = null;

public static Retrofit getInstance(){


    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .connectTimeout(22,TimeUnit.SECONDS)
            .readTimeout(22, TimeUnit.SECONDS)
            .writeTimeout(22, TimeUnit.SECONDS)
            .build();

    if(retrofit == null)
        retrofit = new Retrofit.Builder()
                .baseUrl("https://www.flypped.com/api/")
                .addConverterFactory(GsonConverterFactory.create(new GsonBuilder().setLenient().create()))
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .client(okHttpClient)
                .build();

    return retrofit;

  }

}

public class Model {

@SerializedName("catId")
@Expose
String catId;

@SerializedName("catName")
@Expose
String catName;

public Model(){

}

public Model(String catId, String catName) {
    this.catId = catId;
    this.catName = catName;
}

public String getCatId() {
    return catId;
}

public void setCatId(String catId) {
    this.catId = catId;
}

public String getCatName() {
    return catName;
}

public void setCatName(String catName) {
    this.catName = catName;
}

}

private void fetchData(){

    Retrofit retrofit = RetrofitClient.getInstance();
    ApiService myApi = retrofit.create(ApiService.class);

     myApi.getData().subscribeOn(Schedulers.io())
                                           .observeOn(AndroidSchedulers.mainThread())
                                           .subscribe(new Observer<List<Model>>() {
                                               @Override
                                               public void onSubscribe(Disposable d) {
                                                   d.dispose();
                                               }

                                               @Override
                                               public void onNext(List<Model> models) {

                                                   if(models.size() > 0){

                                                       progress.setVisibility(View.INVISIBLE);

                                                      adapter = new PostAdapter(getApplicationContext(),list);
                                                       recycler.setAdapter(adapter);
                                                   }
                                               }

                                               @Override
                                               public void onError(Throwable e) {

                                                   Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_SHORT).show();
                                               }

                                               @Override
                                               public void onComplete() {


                                               }
                                           });

                           }

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

List<Model> list = new ArrayList<>();
Context context;

public PostAdapter(Context context,List<Model> list) {
    this.context = context;
    this.list = list;
}

@NonNull
@Override
public PostAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_row,parent,false);

    ViewHolder view = new ViewHolder(v);
    return view;
}

@Override
public void onBindViewHolder(@NonNull PostAdapter.ViewHolder holder, int position) {

    Model model = list.get(position);

    holder.catName.setText(model.getCatName());
    holder.catId.setText(model.getCatId());
}

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

public class ViewHolder extends RecyclerView.ViewHolder {

    TextView catId,catName,comp,titl;

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

        catId = itemView.findViewById(R.id.catId);
        catName = itemView.findViewById(R.id.catName);
    }
  }
}

公共类PostAdapter扩展了RecyclerView.Adapter{
列表=新的ArrayList（）；
语境；
公共PostAdapter（上下文、列表）{
this.context=上下文；
this.list=列表；
}
@非空
@凌驾
public PostAdapter.ViewHolder onCreateViewHolder（@NonNull ViewGroup父级，int-viewType）{
视图v=LayoutInflater.from（parent.getContext（））.flate（R.layout.layout_行，parent，false）；
视窗夹持器视图=新视窗夹持器（v）；
返回视图；
}
@凌驾
public void onBindViewHolder（@NonNull PostAdapter.ViewHolder，int位置）{
模型=list.get（位置）；
holder.catName.setText（model.getCatName（））；
holder.catId.setText（model.getCatId（））；
}
@凌驾
public int getItemCount（）{
返回list.size（）；
}
公共类ViewHolder扩展了RecyclerView.ViewHolder{
文本视图catId、catName、comp、titl；
公共视图持有者（@NonNull View itemView）{
超级（项目视图）；
catId=itemView.findviewbyd（R.id.catId）；
catName=itemView.findViewById（R.id.catName）；
}
}
}

有人请让我知道我做错了任何帮助将不胜感激

谢谢

您正在呼叫

d.dispose（）

在订阅中

onSubscribe

中，它将处理资源和结果，以便根据需要删除调用

当要从内存中删除活动（或片段）时，您可以在

onDestroy

中移动

dispose

，以释放资源（JIC请求仍在运行），并确保在recycler视图中设置了布局管理器。

我已删除

d.dispose（）

现在它在log cat中显示json对象的总数，但在recycler视图中不显示数据。@Digvijay已添加布局管理器

recycler.setLayoutManager（新的LinearLayoutManager（上下文））；回收器。设置适配器（适配器）如果是，则确保布局设置正确问题已解决实际上问题在模型类中可序列化密钥与服务器密钥不匹配。