check android application is in foreground or not

Question

I went through a lot of answers for this question But it s all about single activity  How to check whether the whole app is running in foreground or not

User · Answer

Try ActivityLifecycleCallbacks in your Application class

User · Answer

I don t understand what you want  but You can detect currently foreground background application with ActivityManager getRunningAppProcesses   call   Something like   class ForegroundCheckTask extends AsyncTask lt Context  Void  Boolean gt        Override   protected Boolean doInBackground Context    params        final Context context   params 0  getApplicationContext        return isAppOnForeground context          private boolean isAppOnForeground Context context        ActivityManager activityManager    ActivityManager  context getSystemService Context ACTIVITY SERVICE       List lt RunningAppProcessInfo gt  appProcesses   activityManager getRunningAppProcesses        if  appProcesses    null          return false            final String packageName   context getPackageName        for  RunningAppProcessInfo appProcess   appProcesses          if  appProcess importance    RunningAppProcessInfo IMPORTANCE FOREGROUND  amp  amp  appProcess processName equals packageName             return true                    return false            Use like this  boolean foregroud   new ForegroundCheckTask   execute context  get      Also let me know if I misunderstand    UPDATE  Look at this SO question Determining the current foreground application from a background task or service fore more information    Thanks

User · Answer

Below is updated solution for the latest Android SDK   String PackageName   context getPackageName            ActivityManager manager    ActivityManager  context getSystemService ACTIVITY SERVICE           ComponentName componentInfo          if  Build VERSION SDK INT  gt   Build VERSION CODES M                        List lt ActivityManager AppTask gt  tasks   manager getAppTasks                componentInfo   tasks get 0  getTaskInfo   topActivity                    else                       List lt ActivityManager RunningTaskInfo gt  tasks   manager getRunningTasks 1               componentInfo   tasks get 0  topActivity                     if  componentInfo getPackageName   equals PackageName               return true          return false    Hope this helps  thanks

User · Answer

Below solution works from API level 14   Backgrounding ComponentCallbacks2     Looking at the documentation is not 100  clear on how you would use this  However  take a closer look and you will noticed the onTrimMemory method passes in a flag  These flags are typically to do with the memory availability but the one we care about is TRIM MEMORY UI HIDDEN  By checking if the UI is hidden we can potentially make an assumption that the app is now in the background  Not exactly obvious but it should work   Foregrounding ActivityLifecycleCallbacks     We can use this to detect foreground by overriding onActivityResumed and keeping track of the current application state  Foreground Background    Create our interface that will be implemented by a custom Application class  interface LifecycleDelegate       fun onAppBackgrounded       fun onAppForegrounded       Create a class that is going to implement the ActivityLifecycleCallbacks and ComponentCallbacks2 and override onActivityResumed and onTrimMemory methods     Take an instance of our lifecycleHandler as a constructor parameter class AppLifecycleHandler private val lifecycleDelegate  LifecycleDelegate     Application ActivityLifecycleCallbacks  ComponentCallbacks2     lt -- Implement these      private var appInForeground   false           Override from Application ActivityLifecycleCallbacks     override fun onActivityResumed p0  Activity            if   appInForeground              appInForeground   true           lifecycleDelegate onAppForegrounded                            Override from ComponentCallbacks2     override fun onTrimMemory level  Int            if  level    ComponentCallbacks2 TRIM MEMORY UI HIDDEN              lifecycleDelegate instance was passed in on the constructor           lifecycleDelegate onAppBackgrounded                      Now all we need to do is have our custom Application class implement our LifecycleDelegate interface and register   class App   Application    LifeCycleDelegate        override fun onCreate             super onCreate           val lifeCycleHandler   AppLifecycleHandler this          registerLifecycleHandler lifeCycleHandler             override fun onAppBackgrounded             Log d  Awww    App in background              override fun onAppForegrounded             Log d  Yeeey    App in foreground              private fun registerLifecycleHandler lifeCycleHandler  AppLifecycleHandler            registerActivityLifecycleCallbacks lifeCycleHandler          registerComponentCallbacks lifeCycleHandler             In Manifest set the CustomApplicationClass   lt application         android name   App

User · Answer

check if the app is in background or foreground  This method will return true if the app is in background   First add the GET TASKS permission to your AndroidManifest xml  private boolean isAppIsInBackground Context context        boolean isInBackground   true      ActivityManager am    ActivityManager  context getSystemService Context ACTIVITY SERVICE       if  Build VERSION SDK INT  gt  Build VERSION CODES KITKAT WATCH            List lt ActivityManager RunningAppProcessInfo gt  runningProcesses   am getRunningAppProcesses            for  ActivityManager RunningAppProcessInfo processInfo   runningProcesses                if  processInfo importance    ActivityManager RunningAppProcessInfo IMPORTANCE FOREGROUND                    for  String activeProcess   processInfo pkgList                        if  activeProcess equals context getPackageName                               isInBackground   false                                                                        else           List lt ActivityManager RunningTaskInfo gt  taskInfo   am getRunningTasks 1           ComponentName componentInfo   taskInfo get 0  topActivity          if  componentInfo getPackageName   equals context getPackageName                   isInBackground   false                       return isInBackground

User · Answer

From Android 19  you can register an app life cycle callback in your Application class s onCreate   like this    Override public void onCreate         super onCreate        registerActivityLifecycleCallbacks new AppLifecycleCallback         The AppLifecycleCallback looks like this   class AppLifecycleCallback implements Application ActivityLifecycleCallbacks       private int numStarted   0        Override     public void onActivityCreated Activity activity  Bundle savedInstanceState                 Override     public void onActivityStarted Activity activity            if  numStarted    0                 app went to foreground                   numStarted                Override     public void onActivityResumed Activity activity                 Override     public void onActivityPaused Activity activity                 Override     public void onActivityStopped Activity activity            numStarted--          if  numStarted    0                   app went to background                       Override     public void onActivitySaveInstanceState Activity activity  Bundle outState                 Override     public void onActivityDestroyed Activity activity

User · Answer

I have tried with package filter from running process  but that is very weird  Instead of that  I have try new solution and this work perfectly  I have checked many times and getting perfect result through this module   private int numRunningActivities   0    public void onCreate             super onCreate    this registerActivityLifecycleCallbacks new ActivityLifecycleCallbacks                       Override                 public void onActivityStarted Activity activity                        numRunningActivities                        if  numRunningActivities    1                            LogUtils d  APPLICATION    APP IN FOREGROUND                                                               Override                 public void onActivityStopped Activity activity                         numRunningActivities--                      if  numRunningActivities    0                           Log e      App is in BACKGROUND                                                               Override                 public void onActivitySaveInstanceState Activity activity  Bundle outState                                        Override                 public void onActivityResumed Activity activity                                        Override                 public void onActivityPaused Activity activity                                        Override                 public void onActivityDestroyed Activity activity                                        Override                 public void onActivityCreated Activity activity  Bundle savedInstanceState

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Android Architecture Components library you can use the ProcessLifecycleOwner to set up a listener to the whole application process for onStart and onStop events  To do this  make your application class implement the LifecycleObserver interface and add some annotations for onStart and onStop to your foreground and background methods   class ArchLifecycleApp   Application    LifecycleObserver        override fun onCreate             super onCreate           ProcessLifecycleOwner get   lifecycle addObserver this              OnLifecycleEvent Lifecycle Event ON STOP      fun onAppBackgrounded             Log d  Awww    App in background               OnLifecycleEvent Lifecycle Event ON START      fun onAppForegrounded             Log d  Yeeey    App in foreground

User · Answer

There is no global callback for this  but for each activity it is onStop    You don t need to mess with an atomic int  Just have a global int with the number of started activities  in every activity increment it in onStart   and decrement it in onStop     public class BaseActivity extends ActionBarActivity   public static int count   0   public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState        Override protected void onStart         super onStart        count   count   1      Log d TAG   onStart    count       if  count    1            Toast makeText getApplicationContext     online   Toast LENGTH SHORT  show                 protected void onStop         super onStop        count   count - 1      if  count    0             Toast makeText getApplicationContext     offline   Toast LENGTH SHORT  show

User · Answer

I ve found a simple soluition for this by creating a base activity class   u must extend all your activity classes from this    public class BaseActivity extends ActionBarActivity     Override protected void onResume         ApplicationStateChecker view resumed this       super onResume        Override protected void onStop         ApplicationStateChecker view stopped this       super onStop         Override protected void onPause         ApplicationStateChecker view paused this       super onPause            ApplicationStateChecker class    public class ApplicationStateChecker    private  static final String  pause string    paused   private  static final String  resume string    resumed    private static String  view lastState  private static boolean  from background   true   public static void view paused Activity activity        view lastState    pause string     public static void view stopped Activity activity        if     view lastState equals  pause string               if stop called and last event was pause then app is brought to background          from background   true           if     public static void view resumed Activity activity        if     from background              Do your stuff here   app is brought to foreground            if       from background   false       view lastState    resume string

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Update Oct 2020  Checkout the Lifecycle extensions based solutions on this thread  The approach seems to be working  it s more elegant and modern   The neatest and not deprecated way that I ve found so far to do this  as follows   Override public boolean foregrounded         ActivityManager RunningAppProcessInfo appProcessInfo   new ActivityManager RunningAppProcessInfo        ActivityManager getMyMemoryState appProcessInfo       return  appProcessInfo importance    IMPORTANCE FOREGROUND    appProcessInfo importance    IMPORTANCE VISIBLE     It only works with SDK 16   EDIT  I removed the following code from the solution  KeyguardManager km    KeyguardManager  getSystemService Context KEYGUARD SERVICE      App is foreground  but screen is locked  so show notification return km inKeyguardRestrictedInputMode     since that makes not getting the notifications if the screen locked  I had a look to the framework and the purpose of this is not entirely clear  I d remove it  Checking the process info state would be enough  -

User · Answer

cesards s answer is correct  but only for API   15  For lower API versions I decided to use getRunningTasks   method      private boolean isAppInForeground Context context                if  android os Build VERSION SDK INT  lt  Build VERSION CODES LOLLIPOP                        ActivityManager am    ActivityManager  context getSystemService ACTIVITY SERVICE               ActivityManager RunningTaskInfo foregroundTaskInfo   am getRunningTasks 1  get 0               String foregroundTaskPackageName   foregroundTaskInfo topActivity getPackageName                 return foregroundTaskPackageName toLowerCase   equals context getPackageName   toLowerCase                       else                       ActivityManager RunningAppProcessInfo appProcessInfo   new ActivityManager RunningAppProcessInfo                ActivityManager getMyMemoryState appProcessInfo               if  appProcessInfo importance    IMPORTANCE FOREGROUND    appProcessInfo importance    IMPORTANCE VISIBLE                                return true                             KeyguardManager km    KeyguardManager  context getSystemService Context KEYGUARD SERVICE                  App is foreground  but screen is locked  so show notification             return km inKeyguardRestrictedInputMode                      Please  let me know if it works for you all

User · Answer

user370305 s answer is error prone and discouraged by Android OS Developers  check https   groups google com forum   msg android-developers zH-2bovZSLg L2YM8Z1N-HwJ   There is a much more simpler approach   On a BaseActivity that all Activities extend   protected static boolean isVisible   false    Override public void onResume        super onResume       setVisible true       Override public void onPause         super onPause        setVisible false       Whenever you need to check if any of your application activities is in foreground just check isVisible     To understand this approach check this answer of side-by-side activity lifecycle  Activity side-by-side lifecycle

User · Answer

None of the solutions base on getRunningTasks   works in recent Android versions  getRunningTasks   was deprecated in API level 21  Even if it is still used it does not return enough information to determine if the app is in the foreground   Instead extend the Application class and use Application ActivityLifecycleCallbacks to track application visibility state   public class MyApplication extends Application       static final String APP STATE FOREGROUND    com xxx appstate FOREGROUND       static final String APP STATE BACKGROUND    com xxx appstate BACKGROUND       private static int m foreground   -1      private Handler m handler   new Handler        private Runnable m guard       public static boolean isForeground             return m foreground    1              Override     public void onCreate             super onCreate            registerActivityLifecycleCallbacks new Application ActivityLifecycleCallbacks                   Override             public void onActivityCreated Activity activity  Bundle bundle                                Override             public void onActivityStarted Activity activity                                Override             public void onActivityResumed Activity activity                    if m guard    null                        m handler removeCallbacks m guard                       m guard   null                                    if m foreground    1                      return                  m foreground   1                  sendBroadcast new Intent APP STATE FOREGROUND                                Override             public void onActivityPaused Activity activity                    if m foreground    0                      return                                        Use a 400ms guard to protect against jitter                    when switching between two activities                    in the same app                                     m guard   new Runnable                          Override                     public void run                             if m foreground    1                                m foreground   0                              sendBroadcast new Intent APP STATE BACKGROUND                                                                                       m handler postDelayed m guard  400                               Override             public void onActivityStopped Activity activity                                Override             public void onActivitySaveInstanceState Activity activity  Bundle bundle                                Override             public void onActivityDestroyed Activity activity                                        Using the 400ms guard timer eliminates false detection of background state when switching between activities in the same app  The background foreground state can be queried at anytime using   MyApplication isForeground      A class can also listen for the broadcast events if it is interested in the state transitions   private static IntentFilter m appStateFilter   static       m appStateFilter   new IntentFilter        m appStateFilter addAction MyApplication APP STATE FOREGROUND       m appStateFilter addAction MyApplication APP STATE BACKGROUND      private BroadcastReceiver m appStateReceiver   new BroadcastReceiver          Override     public void onReceive Context context  Intent intent            String action   intent getAction            if  action equals MyApplication APP STATE FOREGROUND                    application entered foreground              else if  action equals MyApplication APP STATE BACKGROUND                    application entered background                       registerReceiver m appStateReceiver  m appStateFilter

User · Answer

With the new Android Architecture of Lifecycle extensions  we can achieve this with utmost ease   Just ensure you pull this dependency in your build gradle file   dependencies       implementation  android arch lifecycle extensions 1 1 0      Then in your Application class  use this   class ArchLifecycleApp   Application    LifecycleObserver        override fun onCreate             super onCreate           ProcessLifecycleOwner get   lifecycle addObserver this              OnLifecycleEvent Lifecycle Event ON STOP      fun onAppBackgrounded             Log d  MyApp    App in background               OnLifecycleEvent Lifecycle Event ON START      fun onAppForegrounded             Log d  MyApp    App in foreground             In the end  update your AndroidManifest xml file with    lt application     android name   ArchLifecycleApp        Your extra code          gt   lt  application gt    Now  on everytime the Application goes to Foreground or Background  we are going to receive the Logs associated with the two methods declared

[android] check android application is in foreground or not?

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