在改造中使用有方法

Question

嗨，朋友我无法理解如何做到这一点，请帮助我。我正在使用Json解析工作的改进，当数据在那里但是当它没有数据时，那么响应将会与下面不同，当我使用Volley时，那么我使用了方法来知道数据在那里或没有，但我不能这样做，在改造

{ 
    "messae": "No Friends Found", 
    "status": "failure" 
} 

但是当数据有反应会是这样

{ 
    "friends": [ 
     { 
      "username": "tester", 
      "user_id": "7", 
      "profile": "http://54.202.3.127/parallel_space/uploads/noimage.png", 
      "city": "kakinada", 
      "phone": "7894561231", 
      "status": "1" 
     }, 
     { 
      "username": "tester", 
      "user_id": "9", 
      "profile": "http://54.202.3.127/parallel_space/uploads/http://54.202.3.127/parallel_space/uploads/pic-91488861905.jpg", 
      "city": "kakinada", 
      "phone": "7894561230", 
      "status": "1" 
     } 
    ], 
    "status": "Success" 
} 

Main.class

public class Friend_request extends AppCompatActivity { 
    @BindView(R.id.frd_req_list) 
    RecyclerView frd_req_list; 
    FastItemAdapter<Friend_Request_adapter> friend_request_adapter = new FastItemAdapter<>(); 
    @BindView(R.id.frd_req_toolbar) 
    Toolbar frd_req_toolbar; 

    @Override 
    protected void onCreate(@Nullable Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.friend_requets); 
     ButterKnife.bind(this); 
     setSupportActionBar(frd_req_toolbar); 
     assert getSupportActionBar() != null; 
     getSupportActionBar().setTitle("Friend Request"); 
     getSupportActionBar().setDefaultDisplayHomeAsUpEnabled(true); 
     getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
     frd_req_list.setLayoutManager(new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.VERTICAL, false)); 
     frd_req_list.addItemDecoration(new Divider(this, LinearLayoutManager.VERTICAL)); 
     frd_req_list.setAdapter(friend_request_adapter); 
     frdreq_method(); 
    } 

    private void frdreq_method() { 
     Constant.showloader(Friend_request.this); 
     Retrofit frq_reqretrofit = new Retrofit.Builder().baseUrl(Constant.url).client(Constant.okClient()).addConverterFactory(GsonConverterFactory.create()).build(); 
     Api fre_req_api = frq_reqretrofit.create(Api.class); 
     Call<Friend_Request_adapter> frq_req_call = fre_req_api.frdreqcall(Session.getUserID(getApplicationContext())); 
     frq_req_call.enqueue(new Callback<Friend_Request_adapter>() { 
      @Override 
      public void onResponse(Call<Friend_Request_adapter> call, Response<Friend_Request_adapter> response) { 
       Constant.l(String.valueOf(response)); 
       List<Friend_Request_adapter> frdlistadapter = response.body().getFriends(); 
       friend_request_adapter.add(frdlistadapter); 
       Constant.dismissloader(); 
      } 

      @Override 
      public void onFailure(Call<Friend_Request_adapter> call, Throwable t) { 
       Constant.l(t.toString()); 
       Constant.dismissloader(); 
      } 
     }); 
    } 

} 

一dapter.class（使用麦克PENZ快速适配器）

public class Friend_Request_adapter extends AbstractItem<Friend_Request_adapter, Friend_Request_adapter.FriendRequest_ViewHolder> { 
    JsonObject frdreqbj; 
    @SerializedName("messae") 
    private String messae; 
    @SerializedName("status") 
    private String responsestatus; 
    @SerializedName("friends") 
    List<Friend_Request_adapter> friends; 
    @SerializedName("profile") 
    private String friendreq_pic; 
    @SerializedName("username") 
    private String frienduser_name; 
    @SerializedName("status") 
    private String friendstatus; 
    @SerializedName("user_id") 
    private String frduserid; 

    public String getMessae() { 
     return messae; 
    } 

    public void setMessae(String messae) { 
     this.messae = messae; 
    } 

    public String getResponsestatus() { 
     return responsestatus; 
    } 

    public void setResponsestatus(String responsestatus) { 
     this.responsestatus = responsestatus; 
    } 

    public JsonObject getFrdreqbj() { 
     return frdreqbj; 
    } 

    public void setFrdreqbj(JsonObject frdreqbj) { 
     this.frdreqbj = frdreqbj; 
    } 

    public List<Friend_Request_adapter> getFriends() { 
     return friends; 
    } 

    public void setFriends(List<Friend_Request_adapter> friends) { 
     this.friends = friends; 
    } 

    public String getFrduserid() { 
     return frduserid; 
    } 

    public void setFrduserid(String frduserid) { 
     this.frduserid = frduserid; 
    } 

    public String getFriendstatus() { 
     return friendstatus; 
    } 

    public void setFriendstatus(String friendstatus) { 
     this.friendstatus = friendstatus; 
    } 

    public String getFriendreq_pic() { 
     return friendreq_pic; 
    } 

    public void setFriendreq_pic(String friendreq_pic) { 
     this.friendreq_pic = friendreq_pic; 
    } 

    public String getFrienduser_name() { 
     return frienduser_name; 
    } 

    public void setFrienduser_name(String frienduser_name) { 
     this.frienduser_name = frienduser_name; 
    } 

    @Override 
    public int getType() { 
     return R.id.frd_req_list; 
    } 


    @Override 
    public int getLayoutRes() { 
     return R.layout.friend_request_item; 
    } 

    @Override 
    public void bindView(FriendRequest_ViewHolder holder, List<Object> payloads) { 
     super.bindView(holder, payloads); 
     holder.frd_req_item_name.setText(frienduser_name); 
     holder.frd_req_msg.setText("Online"); 
     Picasso.with(holder.itemView.getContext()).load(friendreq_pic).into(holder.frd_req_img); 
    } 

    public static class FriendRequest_ViewHolder extends RecyclerView.ViewHolder { 
     @BindView(R.id.frd_req_img) 
     CircleImageView frd_req_img; 
     @BindView(R.id.frd_req_item_name) 
     TextView frd_req_item_name; 
     @BindView(R.id.frd_req_msg) 
     TextView frd_req_msg; 
     @BindView(R.id.accept) 
     FancyButton accept; 
     @BindView(R.id.delete) 
     FancyButton delete; 


     public FriendRequest_ViewHolder(View itemView) { 
      super(itemView); 
      ButterKnife.bind(this, itemView); 
     } 
    } 
} 

Answer 1

你必须检查或者success或从服务器failure。因此，您必须制作另一个Model类，然后检查是否成功。

public class FriendsResposne implements Serializable { 
    @SerializedName("status") 
    private String status; 
    @SerializedName("messae") 
    private String message; 
    @SerializedName("friends") 
    private List<Friend_Request_adapter> friendsArr; 

    public String getStatus() { 
     return status; 
    } 

    public void setStatus(String status) { 
     this.status = status; 
    } 

    public String getMessage() { 
     return message; 
    } 

    public void setMessage(String message) { 
     this.message = message; 
    } 

    public List<Friend_Request_adapter> getFriendsArr() { 
     return friendsArr; 
    } 

    public void setFriendsArr(List<Friend_Request_adapter> friendsArr) { 
     this.friendsArr = friendsArr; 
    } 
} 

，然后调用像

private void frdreq_method() { 
     Constant.showloader(Friend_request.this); 
     Retrofit frq_reqretrofit = new Retrofit.Builder().baseUrl(Constant.url).client(Constant.okClient()).addConverterFactory(GsonConverterFactory.create()).build(); 
     Api fre_req_api = frq_reqretrofit.create(Api.class); 
     Call<FriendsResposne> frq_req_call = fre_req_api.frdreqcall(Session.getUserID(getApplicationContext())); 
     frq_req_call.enqueue(new Callback<FriendsResposne>() { 
      @Override 
      public void onResponse(Call<FriendsResposne> call, Response<FriendsResposne> response) { 
       Constant.l(String.valueOf(response)); 

       FriendsResposne fr = response.body(); 

       if(fr.getStatus.equals("Success")){// check here success or not 
        List<Friend_Request_adapter> frdlistadapter =  fr.getFriends(); 
        friend_request_adapter.add(frdlistadapter); 
       }else{ 
        Toast.makeText(this, fr.getMessage(), Toast.LENGTH_SHORT).show(); 
       } 
       Constant.dismissloader(); 
      } 

      @Override 
      public void onFailure(Call<FriendsResposne> call, Throwable t) { 
       Constant.l(t.toString()); 
       Constant.dismissloader(); 
      } 
     }); 
    } 

让我知道，如果你正面临的任何问题。