handleWindowVisibility:令牌 android.os.BinderProxy 没有活动 [英] handleWindowVisibility: no activity for token android.os.BinderProxy

问题描述

我有一个登录屏幕，成功登录后，它会完成并显示另一个包含用户信息的页面.
我阅读了这篇文章 以及这篇文章.
我还阅读了很多关于我们如何扩展 Application 类的内容，但我仍然无法运行此代码.
你可以在下面找到我的代码，我也会解释错误.

I have a Login screen and upon success login, it finishes and shows another page that has information about the user.
I read about this post and also this post.
I also read a lot about how we extend Application class but still it is not possible for me to run this code.
Below you can find my code and I will explain the error also.

这是我使用 Volley 调用 AsyncTask 的方式:
错误就像 no activity for token android.os.BinderProxy 并且当我调用 startActivity(intent); 时它会出现.
我知道这个错误是因为活动被终止了，并且 Volley 响应之后的 AsyncTask 想要使用终止的上下文，但我不知道如何修复它.

This is how I user Volley to call an AsyncTask:
The error is like no activity for token android.os.BinderProxy and it will come when I call startActivity(intent);.
I know this error is because the activity is killed and the AsyncTask after Volley response wants to use a killed context but I don't know how to fix it.

Util.request_function(
     activity,
     MainActivity.user_session,
     key_value,
     new VolleyCallback() {
          @Override
          public void onSuccess(JSONObject result, Context context) {

                 Activity activity = 
                 MyBaseActivity.myCustomApplication.getCurrentActivity();
                 Intent intent = new Intent(activity, SelfieCapture.class);
                 startActivity(intent);
                 finish();
          }
          @Override
          public void onError(String result) {

          }
});

我有如下接口:
VolleyCallback.java:

public interface VolleyCallback {
    void onSuccess(JSONObject result) throws JSONException;
    void onError(String result) throws Exception;
}

Util.java

public static void request_function(Context context, CognitoUserSession cognitoUserSession, Map<String, String> key_value, final VolleyCallback callback) {
        JSONObject jsonBody = new JSONObject();
        CustomJSONObjectRequest postRequest = new CustomJSONObjectRequest(Request.Method.POST,
                MainActivity.API_URL,
                null,
                response -> {
                   JSONObject jsonObject = (JSONObject) response;
                   //SoMe Stuff//
                   callback.onSuccess(null);
             }, error -> {
                   //Log Error//
             }){
                  @Override
                  public String getBodyContentType() {
                         return "application/json; charset=utf-8";
                  }

                  @Override
                  public Map<String, String> getHeaders() {
                  final Map<String, String> headers = new HashMap<>();
                  headers.put("Content-Type", "application/json");
                         return headers;
                  } 

                  @Override
                  public byte[] getBody() {
                         return jsonBody.toString().getBytes();
                  }
        };
     // Request added to the RequestQueue
     VolleyController.getInstance(context).addToRequestQueue(postRequest);

MyCustomApplication.java

public class MyCustomApplication extends Application {

    private Activity mCurrentActivity = null;

    public void onCreate() {
        super.onCreate();

    }

    public Activity getCurrentActivity() {
        return mCurrentActivity;
    }

    public void setCurrentActivity(Activity mCurrentActivity) {
        this.mCurrentActivity = mCurrentActivity;
    }
}

MyBaseActivity.java

public class MyBaseActivity extends Activity {
    public static MyCustomApplication myCustomApplication;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        myCustomApplication = (MyCustomApplication)this.getApplicationContext();
    }
    protected void onResume() {
        super.onResume();
        myCustomApplication.setCurrentActivity(this);
    }
    protected void onPause() {
        clearReferences();
        super.onPause();
    }
    protected void onDestroy() {
        clearReferences();
        super.onDestroy();
    }

    private void clearReferences(){
        Activity currActivity = myCustomApplication.getCurrentActivity();
        if (this.equals(currActivity))
            myCustomApplication.setCurrentActivity(null);
    }
}

推荐答案

这段代码看起来是正确的，但我唯一的怀疑是当你想在 startActivity(intent) 中打开新的活动时，错误发生.
所以检查下一个名为 SelfieCapture.class 的被触发的类，看看它是否也从 MyBaseActivity 扩展.
还要考虑当你想要获取currentActivity时，如果你把它放在onCreate中，你会得到null.更多信息请参考了解Activity生命周期强>.

This code Seems correct but my only suspicion is that when you want to open the new activity in startActivity(intent), the error occurs.
So check the next fired class named SelfieCapture.class to see whether it extends from MyBaseActivity also.
Also consider that when you want to get the currentActivity, if you put it in onCreate, you will get null. For more information please refer to Understand the Activity Lifecycle.

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