Two ways to determine whether an Android program is running in the foreground _android

@Override 
protected void OnStop () { 
  if (!isapponforeground ()) { 
    debug.i ("Dwy", "Enter Background"); 
    Misbackground = true; 
  } else { 
    debug.i ("Dwy", "foreground"); 
    Misbackground = false; 
  

Judge is app. background when onStop () get called.

public Boolean isapponforeground () { 
    //Returns A list of application processes this are running on the 
    //device< C3/>activitymanager Activitymanager = (Activitymanager) getapplicationcontext (). Getsystemservice (Context.ACTIVITY_ SERVICE); 
    String PackageName = Getapplicationcontext (). Getpackagename (); 
 
    list<activitymanager.runningappprocessinfo> appprocesses = Activitymanager 
        . getRunningAppProcesses (); 
    if (appprocesses = null) return 
      false; 
 
    for (Activitymanager.runningappprocessinfo appprocess:appprocesses) { 
      //The name of the process, this object I s associated with. 
      if (AppProcess.processName.equals (packagename) 
          && appprocess.importance = = ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {return 
        true; 
      } 
    } 
    return false; 
  } 

Method Two:

/** 
  * Need permission: Android.permission.GET_TASKS 
  * * 
  @param context 
  * @return/Public 
  Boolean Isapplicationbroughttobackground { 
    Activitymanager am = (activitymanager) context 
            . Getsystemservice (context.activity_service); 
    list<runningtaskinfo> tasks = am.getrunningtasks (1); 
    if (Tasks!= null &&!tasks.isempty ()) { 
      ComponentName topactivity = tasks.get (0). topactivity; 
      DEBUG.I (TAG, "topactivity:" + topactivity.flattentostring ()); 
      DEBUG.F (TAG, "topactivity:" + topactivity.flattentostring ()); 
      if (!topactivity.getpackagename (). Equals (Context.getpackagename ()) {return 
        true; 
      } 
    } 
    return false; 
  }