RxJava，改造錯誤：預期BEGIN_ARRAY但BEGIN_OBJECT在行1列2路我使用改造和<strong>RxJava</strong>庫，並試圖解析這個URL $

Question

：

我的代碼如下所示。

APIInterface.java

public interface APIService { 
    @GET("/bins/tdze5") 
    Observable<List<Student>> getdata(); 
} 

MainActivity.java

public class MainActivity extends AppCompatActivity { 

    private RecyclerView recyclerView; 
    private List<Student> list; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    recyclerView = (RecyclerView) findViewById(R.id.recyclerview); 

    getData(); 
    } 

    private void getData() { 
    Retrofit retrofit = new Retrofit.Builder() 
      .baseUrl("https://api.myjson.com") 
      .addConverterFactory(GsonConverterFactory.create()) 
      .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) 
      .build(); 
    APIService apiService = retrofit.create(APIService.class); 

    Observable<List<Student>> observable = apiService.getdata().subscribeOn(Schedulers.newThread()) 
      .observeOn(AndroidSchedulers.mainThread()); 

    observable.subscribe(new Observer<List<Student>>() { 
     @Override 
     public void onCompleted() { 
     } 

     @Override 
     public void onError(Throwable e) { 
     Log.d("error",e.toString()); 
     } 

     @Override 
     public void onNext(List<Student> students) { 
     list = new ArrayList<>(); 
     Log.d("response size", String.valueOf(students.size())); 
     for(int i = 0; i < students.size(); i++){ 
      Student student = new Student(); 
      student.setId(students.get(i).getId()); 
      student.setName(students.get(i).getName()); 
      list.add(student); 
     } 

     RecyclerAdapter recyclerAdapter = new RecyclerAdapter(list); 
     RecyclerView.LayoutManager recyce = new LinearLayoutManager(MainActivity.this); 
     recyclerView.setLayoutManager(recyce); 
     recyclerView.setItemAnimator(new DefaultItemAnimator()); 
     recyclerView.setAdapter(recyclerAdapter); 
     } 
    }); 
    } 
} 

我的模型類是如下

Student.java

public class Student { 

private String id; 

private String name; 

public String getId() { 
    return id; 
} 

public void setId(String id) { 
    this.id = id; 
} 

public String getName() { 
    return name; 
} 

public void setName(String name) { 
    this.name = name; 
} } 

我越來越

D/error: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $ in Log

我已經找遍這個錯誤，但我找不到任何關於RxJava和改造任何東西。

Answer 1

添加這一個更多class並像下面一樣使用它。

public class ResponseClass { 

    @SerializedName("students") 
    @Expose 
    private List<Student> students = null; 

    public List<Student> getStudents() { 
    return students; 
    } 

    public void setStudents(List<Student> students) { 
    this.students = students; 
    } 

    } 

APIInterface.java

public interface APIService { 
    @GET("/bins/tdze5") 
    Observable<ResponseClass> getdata(); 
} 

MainActivity.java

private void getData() { 
    Retrofit retrofit = new Retrofit.Builder() 
      .baseUrl("https://api.myjson.com") 
      .addConverterFactory(GsonConverterFactory.create()) 
      .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) 
      .build(); 
    APIService apiService = retrofit.create(APIService.class); 

    Observable<ResponseClass> observable = apiService.getdata().subscribeOn(Schedulers.newThread()) 
      .observeOn(AndroidSchedulers.mainThread()); 

    observable.subscribe(new Observer<ResponseClass>() { 
     @Override 
     public void onCompleted() { 
     } 

     @Override 
     public void onError(Throwable e) { 
     Log.d("error",e.toString()); 
     } 

     @Override 
     public void onNext(ResponseClass response) { 
     list = new ArrayList<>(); 
     List<Student> students = response.getStudents(); 
     Log.d("response size", String.valueOf(students.size())); 
     for(int i = 0; i < students.size(); i++){ 
      Student student = new Student(); 
      student.setId(students.get(i).getId()); 
      student.setName(students.get(i).getName()); 
      list.add(student); 
     } 

     RecyclerAdapter recyclerAdapter = new RecyclerAdapter(list); 
     RecyclerView.LayoutManager recyce = new LinearLayoutManager(MainActivity.this); 
     recyclerView.setLayoutManager(recyce); 
     recyclerView.setItemAnimator(new DefaultItemAnimator()); 
     recyclerView.setAdapter(recyclerAdapter); 
     } 
    }); 
    }