我們如何檢查Android的應用程序的最近啓動時間？

Question

我想知道android中應用程序的最近啓動時間？

Answer 1

您可以將系統時間記錄在應用程序的主要活動的onCreate中。然後這個時間可以在類級別字段中設置並從應用程序的其他地方訪問。 你也可以有類似的onResume變量（..）等

public class MainActivity extends Activity { 
    long launchTime; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     launchTime = System.currentTimeMillis(); 
     .... 
    } 
} 

Answer 2

你能做的就是創建一個跟蹤所有正在運行的應用程序的粘滯服務最好。

@Override 
public int onStartCommand(Intent intent, int flags, int startId) 
{ 

    Timer timer = new Timer(); 
    timer.scheduleAtFixedRate(new TimerTask() { 

     public void run() 
     { 
      final ActivityManager activityManager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE); 
      final List<RunningTaskInfo> services = activityManager.getRunningTasks(Integer.MAX_VALUE); 
       for (int i = 0; i < services.size(); i++) { 
        if(!stalkList.contains(services.get(i).baseActivity.getPackageName())) 
        { 
          // you may store the time here 
          stalkList.add(services.get(i).baseActivity.getPackageName()); 
        } 
       } 

       List<RunningAppProcessInfo> procInfos = activityManager.getRunningAppProcesses(); 
       for(int i = 0; i < procInfos.size(); i++) { 

        ArrayList<String> runningPkgs = new ArrayList<String>(Arrays.asList(procInfos.get(i).pkgList)); 

        Collection diff = subtractSets(runningPkgs, stalkList); 

        if(diff != null) 
        { 
         stalkList.removeAll(diff); 
        } 
       } 


     } 
    }, 20000, 6000); // every 6 seconds 


    return START_STICKY; 
}