如何在Android 5.0(L)中运行应用程序活动名称?

时间:2014-12-29 12:51:22

标签: android android-5.0-lollipop

我使用以下代码获取android中的当前运行活动名称。

ActivityManager am = (ActivityManager) aContext
                .getSystemService(Context.ACTIVITY_SERVICE);            
List<ActivityManager.RunningTaskInfo> alltasks = am
                .getRunningTasks(1);

ComponentName componentInfo = alltasks.get(0).topActivity;
componentInfo.getClassName();

System.out.println("Current:"+componentInfo.getClassName());

这在android 5.0下面的所有版本中运行良好。但在Android 5.0中,始终返回启动器活动

请任何一个帮助,因为我想在所有Android版本中运行应用程序。

3 个答案:

答案 0 :(得分:15)

在Android L之前,您的代码将起作用,但是从Android L开始,getRunningTask将无法正常工作。你必须使用getAppRunningProcess。

检查以下代码 -

public class DetectCalendarLaunchRunnable implements Runnable {

@Override
public void run() {
  String[] activePackages;
  if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
    activePackages = getActivePackages();
  } else {
    activePackages = getActivePackagesCompat();
  }
  if (activePackages != null) {
    for (String activePackage : activePackages) {
      if (activePackage.equals("com.google.android.calendar")) {
        //Calendar app is launched, do something
      }
    }
  }
  mHandler.postDelayed(this, 1000);
}

String[] getActivePackagesCompat() {
  final List<ActivityManager.RunningTaskInfo> taskInfo = mActivityManager.getRunningTasks(1);
  final ComponentName componentName = taskInfo.get(0).topActivity;
  final String[] activePackages = new String[1];
  activePackages[0] = componentName.getPackageName();
  return activePackages;
}

String[] getActivePackages() {
  final Set<String> activePackages = new HashSet<String>();
  final List<ActivityManager.RunningAppProcessInfo> processInfos = mActivityManager.getRunningAppProcesses();
  for (ActivityManager.RunningAppProcessInfo processInfo : processInfos) {
    if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
      activePackages.addAll(Arrays.asList(processInfo.pkgList));
    }
  }
  return activePackages.toArray(new String[activePackages.size()]);
}
}  

希望这可以帮助你:)

答案 1 :(得分:2)

您可以使用:

String packageName = "";
String className = "";

UsageStatsManager usageStatsManager = (UsageStatsManager) this.getSystemService(Context.USAGE_STATS_SERVICE);

if (usageStatsManager != null)
{
   UsageEvents queryEvents = usageStatsManager.queryEvents(System.currentTimeMillis() - 10000, System.currentTimeMillis());

   if (queryEvents != null) 
   {
      UsageEvents.Event event = new UsageEvents.Event();

      while (queryEvents.hasNextEvent()) 
      {
          UsageEvents.Event eventAux = new UsageEvents.Event();
          queryEvents2.getNextEvent(eventAux);

          if (eventAux.getEventType() == UsageEvents.Event.MOVE_TO_FOREGROUND)
          {
              event = eventAux;
          }
      }

      packageName = event.getPackageName();
      className = event.getClassName();
   }
}

您需要android.permission.PACKAGE_USAGE_STATS,这是系统级权限,不会授予第三方应用。但是,声明权限意味着使用API​​的意图,并且设备的用户可以通过“设置”应用程序授予权限。

或者你可以这样做:

pm grant com.your.package android.permission.PACKAGE_USAGE_STATS

答案 2 :(得分:0)

请检查link

不幸的是,在Android 5.0中没有相应的内容:它无法获得最多的活动,也无法在实时启动新的应用程序/活动时获得任何回调。

methods deplicated in 5.0