异步任务突然完成.调试视图显示线程在Threadpoolexecutor.runWorker(ThreadpoolExe

Question

我正在尝试使用GoogleAuthUtil获取Oauth令牌。getToken，并使用Async task将任务作为单独的线程运行。

LogCat输出显示异步任务所需的参数已传递给它。(在本例中为上下文、电子邮件和作用域)。

下面是Async Task的代码:

public class GetUsernameTask extends AsyncTask<Void, Void, Void>{
    Activity mActivity;
    String mScope;
    String mEmail;
    GetUsernameTask(Activity activity, String Email, String Scope){
        Log.i(TAG,"Local variables are set from received arguments");
        this.mActivity = activity;
        this.mScope = Scope;
        this.mEmail = Email;
    }
    @Override
    protected Void doInBackground(Void... arg0) {
        try {                   
            Log.i(TAG,"fetchToken is called");
            String token = fetchToken();                                                            
                mToken = token;
                //Stuff to do with the token comes here - (Consider sending it to the backend;
            } catch(IOException e){
            }
            return null;
        }

LogCat还告诉我fetchToken()方法被调用。下面是fetchToken()

的代码

private String fetchToken() throws IOException {
    try {                   
        Log.i(TAG,"attempts to getToken");
        return GoogleAuthUtil.getToken(mActivity, mEmail, mScope);
    } catch (UserRecoverableAuthException userRecoverableException){                    
        Log.i(TAG,"recoverable Exception Found");
        //((MainActivity) mActivity).handleException(userRecoverableException);                 
    } catch (GoogleAuthException fatalException){                   
        Log.i(TAG,"fataException found");                   
    }
    return null;
}

调试模式打开前的最后一条logcat消息来自Log。i(TAG，"attempts to getToken"); .

我不知道如何从这里进行，或者如何在这种特殊情况下进行调试。任何下一步的方向都很棒。

Answer 1

android manifest文件中缺少一个元数据标签。我在manifest文件

中添加了以下代码

<meta-data 
            android:name = "com.google.android.gms.version"
            android:value="@integer/google_play_services_version" 
            />

在我添加了打印建议的RuntimeException后，错误被指出。下面是我为RuntimeException

添加的代码

catch (RuntimeException e){
                  Log.i(TAG, "RuntimeException caught");
                  e.printStackTrace();
              }