当我管理推送通知时，如何知道我的应用是否已打开

Question

使用Android，当我收到通知推送我的GCMIntentService时，我想知道我的应用程序是否打开，因为如果我的应用程序打开时用户点击通知我想什么都不做，但如果应用程序关闭我想打开这款应用。

Answer 1

Launch the root activity (the one that has ACTION=MAIN and CATEGORY=LAUNCHER in the manifest) and add Intent.FLAG_ACTIVITY_NEW_TASK . If the app is already active (no matter which activity is on top) this will just bring the task to the front. If the app isn't active, it will start it with your root activity.

Answer 2

Define this in all the activities : 1.) Define a static final boolean flag named 'check_running mode' 2.) Define(override) onResume() and onPause() methods in all activities. 3.) Set the value of this falg as 'true' in onResume() and 'false' in OnPause() methods respectively. 4.) Check out when u receive the push notification : a. If falg value is true it means app is in forground so do nothing in that case b. If flag value is false it means app is in background so You can open the app in that case

NOTE: The falg must be static final as you can change it from any of the activity and access it in your receiver class simply. I hope it'll work for you!

1 :
static boolean check_running mode = false;


-------------------
2:
@Override
protected void onResume() {
    super.onResume();

    check_running mode = true;
}

@Override
protected void onPause() {
    check_running mode = false;

    super.onPause();
}

---------------------
3 :
if (check_running mode) {
    showUserView();
}
else {
    showNotification();
}

Answer 3

public static boolean isAppRunning(Context context) {
    // check with the first task(task in the foreground)
    // in the returned list of tasks
    ActivityManager activityManager = (ActivityManager) context
            .getSystemService(Context.ACTIVITY_SERVICE);
    List<RunningTaskInfo> services = activityManager
            .getRunningTasks(Integer.MAX_VALUE);
    if (services.get(0).topActivity.getPackageName().toString()
            .equalsIgnoreCase(context.getPackageName().toString())) {
        // your application is running in the background
        return true;
    }
    return false;
}