在 Json 改装屏幕上显示 ListView 时出现问题

Question

我有以下Json信息，想拿出来Listview:

{"result":[[[12,"01",1,"Fallo de corriente",0,1],
            [12,"01",2,"Nivel m\u00E1ximo (activaci\u00F3n)",0,0],
            [12,"01",3,"Nivel m\u00E1ximo(desactivaci\u00F3n)",0,1]]]
}

事实是应用程序给我一个错误，我没有提示，我是这样安装的：

我有POSTclass如下：

package com.example.lista.Interface;

    import java.util.List;
    import java.lang.Integer;
    import com.google.gson.annotations.Expose;
    import com.google.gson.annotations.SerializedName;

    public class Post {

    @SerializedName("result")
    @Expose
    private List<List<List<Integer>>> result = null;

    public List<List<List<Integer>>> getResult() {
        return result;
    }

    public void setResult(List<List<List<Integer>>> result) {
        this.result = result;
    }

    }

PostService 接口：

package com.example.lista.Interface;

    import java.util.List;
    import retrofit2.Call;
    import retrofit2.http.GET; 
    import retrofit2.http.Header;

    public interface PostService {

    String API_ROUTE = " obtenerListaAlarmasSMS";

    @GET(API_ROUTE)
    Call<Post> getPost(@Header("Authorization") String credencialesEnBase64);

    }

我的主要内容如下

package com.example.lista.Interface;

    import android.os.Bundle;
    import android.util.Log;
    import android.util.Base64;
    import android.view.View;
    import android.widget.ArrayAdapter;
    import android.widget.ListView;

    import androidx.appcompat.app.AppCompatActivity;

    import com.example.lista.R; 

    import java.lang.reflect.Array;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    import java.lang.String;


    import retrofit2.Call;
    import retrofit2.Callback;
    import retrofit2.Response;
    import retrofit2.Retrofit;
    import retrofit2.converter.gson.GsonConverterFactory;

    import static retrofit2.Response.error;


    public class MainActivity extends AppCompatActivity {


    ListView list;
    List<List<List<List<Integer>>>> titles  = new 
    ArrayList<List<List<List<Integer>>>>();
    ArrayAdapter arrayAdapter;
    String usuario = new String("");
    String clave = new String("");
    String error = new String("Algo ha fallado");

    String credenciales =  usuario + ":" + clave ;;
    String credencialesEnBase64 = "Basic " + 
    Base64.encodeToString(credenciales.getBytes(), Base64.NO_WRAP);

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

        arrayAdapter = new ArrayAdapter(this, 
        android.R.layout.simple_list_item_1, titles);
        list = findViewById(R.id.list);

        list.setAdapter(arrayAdapter);
        getPosts();
    }

    private void getPosts() {
        Retrofit retrofit = new Retrofit.Builder()              
              .baseUrl("http://192.168.0.249:9096/datasnap/rest/TMetodosREST/")
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        PostService postService = retrofit.create(PostService.class);
        Call<Post> call = postService.getPost(credencialesEnBase64);


        call.enqueue(new Callback<Post>() {
            @Override
            public void onResponse(Call<Post> call, Response<Post> response) {

                    for (Post post : response.body()) {
                       titles.add(post.getResult());
                   }

                arrayAdapter.notifyDataSetChanged();
            }
            @Override
            public void onFailure(Call<Post> call, Throwable t) {
            Log.d("MainActivity", t.getMessage());
            }
        });
     }
     }

问题出在它告诉我的 OnResponse 中：

error: for-each not applicable to expression type required: array or java.lang.Iterable found: Post

我不知道是因为创建我的POJO的格式还是它发生了什么。

我想要的是获取ListView

里面的信息

Answer 1

As per your output

[12,"01",1,"Fallo de corriente",0,1]

它包含整数和字符串。你期待 Integer

List<List<List<Integer>>> result

这就是它抛出 NumberFormatException

的原因

将所有整数转换为字符串 ["12","01","1","Fallo de corriente","0","1"]

并期待 String 这样的结果

List<List<List<String>>> result

在 Json 改装屏幕上显示 ListView 时出现问题

Problems Showing ListView on Json Retrofit Screen

android

json

android-studio

retrofit2