Question

我是编程新手，我想显示回收器视图，代码表中没有错误，但在日志中我发现com.example.beaconsenjacoffee.ListPromo$1.onResponse(ListPromo.java:49) 我的代码有什么问题？

public class ListPromo extends AppCompatActivity {
private RecyclerView recyclerView;
private ArrayList<NotificationList> data;
private DataAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_list_promo);
    initviews();
}
private void initviews(){
    recyclerView = findViewById(R.id.card_recycler_view);
    recyclerView.setHasFixedSize(true);
    RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
    recyclerView.setLayoutManager(layoutManager);
    loadJSON();

}
private void loadJSON(){
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("http://api.learn2crack.com")
            .addConverterFactory(GsonConverterFactory.create())
            .build();
    RequestInterface request = retrofit.create(RequestInterface.class);
    Call<JSONResponse> call = request.getJSON();
    call.enqueue(new Callback<JSONResponse>() {
        @Override
        public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) {
            JSONResponse jsonResponse = response.body();
            data = new ArrayList<>(Arrays.asList(jsonResponse.getListNotif()));
            adapter = new DataAdapter(data);
            recyclerView.setAdapter(adapter);
        }

        @Override
        public void onFailure(Call<JSONResponse> call, Throwable t) {
            Log.d("Error",t.getMessage());

        }
    });
}

}

Answer 1

URL错误

URL ="http://api.learn2crack.com"

检查您传递的网址，返回无效的json值，即"Hello"

示例：- 有效的URL = "https://api.androidhive.info/contacts/"

https://www.androidhive.info/2012/01/android-json-parsing-tutorial/

json响应出了点问题

1 个答案: