Question

嗨，我在互联网上找到了一些代码，我正在尝试对其进行测试，但是我没有连接任何适配器，从而跳过了布局错误。我一直徒劳地寻找解决方案。

这是我的MainActivity类：

private ArrayList<Employee> employeeList;
private ProgressDialog pDialog;
private RecyclerView recyclerView;
private EmployeesAdapter eAdapter;

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

    pDialog = new ProgressDialog(MainActivity.this);
    pDialog.setMessage("Loading Data.. Please wait...");
    pDialog.setIndeterminate(false);
    pDialog.setCancelable(false);
    pDialog.show();

    //Creating an object of our api interface
    ApiService api = RetroClient.getApiService();

    /**
     * Calling JSON
     */
    Call<EmployeeList> call = api.getMyJSON();

    /**
     * Enqueue Callback will be call when get response...
     */
    call.enqueue(new Callback<EmployeeList>() {
        @Override
        public void onResponse(Call<EmployeeList> call, Response<EmployeeList> response) {
            //Dismiss Dialog
            pDialog.dismiss();

            if (response.isSuccessful()) {
                /**
                 * Got Successfully
                 */
                employeeList = response.body().getEmployee();
                recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
                eAdapter = new EmployeesAdapter(employeeList);
                RecyclerView.LayoutManager eLayoutManager = new LinearLayoutManager(getApplicationContext());
                recyclerView.setLayoutManager(eLayoutManager);
                recyclerView.setItemAnimator(new DefaultItemAnimator());
                recyclerView.setAdapter(eAdapter);
            }
        }

        @Override
        public void onFailure(Call<EmployeeList> call, Throwable t) {
            pDialog.dismiss();
        }
    });
}

我收到此错误：E / RecyclerView：未连接适配器；跳过布局有什么建议吗？

Answer 1

错误是由于从“延迟”方法初始化recycerlview和适配器。因此要解决此问题，请执行以下操作：

首先按如下所示初始化阵列列表：

private ArrayList<Employee> employeeList = new ArrayList<>();

在api调用之前初始化您的recyclerview，这意味着在主线程中：

recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
eAdapter = new EmployeesAdapter(employeeList);
RecyclerView.LayoutManager eLayoutManager = new LinearLayoutManager(MainActivity.this);
recyclerView.setLayoutManager(eLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(eAdapter);

然后在api响应中，仅当找到列表时才更新适配器：

if(response != null && response.body() != null && response.body().getEmployee() != null){
      employeeList.clear();
      employeeList.addAll(response.body().getEmployee());
      if(eAdapter != null){
           eAdapter.notifyDataSetChanged();
      }
}

Answer 2

在调用后台任务之前，始终先尝试初始化对象，必需的类，适配器（例如LinearLayoutManager）。也许这就是您遇到的问题。

我对您的代码进行了一些更改：

private ArrayList<Employee> employeeList;
private ProgressDialog pDialog;
private RecyclerView recyclerView;
private EmployeesAdapter eAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   employeeList = new ArrayList<>;
   recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
   eAdapter = new EmployeesAdapter(employeeList);
   RecyclerView.LayoutManager eLayoutManager = new 
         LinearLayoutManager(getApplicationContext());
   recyclerView.setLayoutManager(eLayoutManager);
   recyclerView.setItemAnimator(new DefaultItemAnimator());
   recyclerView.setAdapter(eAdapter);

pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Loading Data.. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();

//Creating an object of our api interface
ApiService api = RetroClient.getApiService();

/**
 * Calling JSON
 */
Call<EmployeeList> call = api.getMyJSON();

/**
 * Enqueue Callback will be call when get response...
 */
call.enqueue(new Callback<EmployeeList>() {
    @Override
    public void onResponse(Call<EmployeeList> call, Response<EmployeeList> response) {
        //Dismiss Dialog
        pDialog.dismiss();

        if (response.isSuccessful()) {
            /**
             * Got Successfully
             */
             if(!employeeList.isEmpty())employeeList.clear();
            employeeList.addAll(response.body().getEmployee());
            eAdapter.notifyDataSetChanged();
        }
    }

    @Override
    public void onFailure(Call<EmployeeList> call, Throwable t) {
        pDialog.dismiss();
    }
});
}

Answer 3

错误消息已清除。

创建Activity时，您没有为recyclerView设置适配器。可能您认为您已经在onCreate方法中为recyclerView设置了适配器，但是有两个线程正在运行，一个是主线程，另一个线程是您为recylerView设置适配器的线程。这意味着，当需要附加recylerView适配器时，您为recylerView设置适配器的线程可能会阻止从网络获取数据。

您可以按照以下代码解决此问题！

nslookup adfs-sts.branch.tree.com

未连接适配器，跳过布局错误

3 个答案: