注册开放和关闭android应用程序

Question

如何注册用户打开和关闭我的应用程序？我想注册每个开幕式和每个闭幕式。

例如onResume（）的生命周期方法无效，因为该应用程序使用多个活动。

我找不到任何关于此的信息。

Answer 1

来检查应用程序退出或运行最好的办法是这样的：

public class MyApplication extends Application { 

public static final String LOG_TAG = "MyApp"; 

public boolean wasInBackground = true; 

private AppSession appSession; 
private Timer mActivityTransitionTimer; 
private TimerTask mActivityTransitionTimerTask; 
private final long MAX_ACTIVITY_TRANSITION_TIME_MS = 2000; // Time allowed for transitions 

Application.ActivityLifecycleCallbacks activityCallbacks = new Application.ActivityLifecycleCallbacks() { 

    @Override 
    public void onActivityResumed(Activity activity) { 

     if (wasInBackground) { 
      //Do app-wide came-here-from-background code 
      appEntered(); 
     } 
     stopActivityTransitionTimer(); 
    } 

    @Override 
    public void onActivityPaused(Activity activity) { 
     startActivityTransitionTimer(); 
    } 

    ... 

}; 

@Override 
public void onCreate() { 
    super.onCreate(); 
    registerActivityLifecycleCallbacks(activityCallbacks); 
} 

public void startActivityTransitionTimer() { 
    this.mActivityTransitionTimer = new Timer(); 
    this.mActivityTransitionTimerTask = new TimerTask() { 
     public void run() { 
      // Task is run when app is exited 
      wasInBackground = true; 
      appExited(); 
     } 
    }; 

    this.mActivityTransitionTimer.schedule(mActivityTransitionTimerTask, 
      MAX_ACTIVITY_TRANSITION_TIME_MS); 
} 

public void stopActivityTransitionTimer() { 
    if (this.mActivityTransitionTimerTask != null) { 
     this.mActivityTransitionTimerTask.cancel(); 
    } 

    if (this.mActivityTransitionTimer != null) { 
     this.mActivityTransitionTimer.cancel(); 
    } 

    this.wasInBackground = false; 
} 

private void appEntered() { 
    Log.i(LOG_TAG, "APP ENTERED"); 

    appSession = new AppSession(); 
} 

private void appExited() { 
    Log.i(LOG_TAG, "APP EXITED"); 

    appSession.finishAppSession(); 

    // Submit AppSession to server 
    submitAppSession(appSession); 
    long sessionLength = (appSession.getT_close() - appSession.getT_open())/1000L; 
    Log.i(LOG_TAG, "Session Length: " + sessionLength); 
} 

Answer 2

应用程序类的onCreate方法只在应用程序启动时运行一次。也许扩展应用程序类并创建一些逻辑？

或者，如果您只是在第一个活动的onCreate方法中记录应用程序开放？