How can I check if an app running on Android?

Add the below Helper class:

public class Helper {


public static boolean isAppRunning(final Context context, final String packageName) {
final ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
final List<ActivityManager.RunningAppProcessInfo> procInfos = activityManager.getRunningAppProcesses();
if (procInfos != null)
{
for (final ActivityManager.RunningAppProcessInfo processInfo : procInfos) {
if (processInfo.processName.equals(packageName)) {
return true;
}
}
}
return false;
}
}

Now you can check from the below code if your desired App is running or not:

if (Helper.isAppRunning(YourActivity.this, "com.your.desired.app")) {
// App is running
} else {
// App is not running
}

You can check it by the following method

public static boolean isRunning(Context ctx) {
ActivityManager activityManager = (ActivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);


List<ActivityManager.RunningTaskInfo> tasks = activityManager.getRunningTasks(Integer.MAX_VALUE);


for (ActivityManager.RunningTaskInfo task : tasks) {
if (ctx.getPackageName().equalsIgnoreCase(task.baseActivity.getPackageName()))
return true;
}
return false;
}

isInBackground is the status of app

ActivityManager.RunningAppProcessInfo myProcess = new ActivityManager.RunningAppProcessInfo();
ActivityManager.getMyMemoryState(myProcess);
Boolean isInBackground = myProcess.importance != ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND;

Best solution is :

Create an interface like this.

interface LifeCycleDelegate {
void onAppBackgrounded();
void onAppForegrounded();
}

Now add a class that handle all activity lifecycle callbacks.

public class AppLifecycleHandler implements
Application.ActivityLifecycleCallbacks, ComponentCallbacks2 {


LifeCycleDelegate lifeCycleDelegate;
boolean appInForeground = false;


public AppLifecycleHandler(LifeCycleDelegate lifeCycleDelegate) {
this.lifeCycleDelegate = lifeCycleDelegate;
}


@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {


}


@Override
public void onActivityStarted(Activity activity) {


}


@Override
public void onActivityResumed(Activity activity) {
if (!appInForeground) {
appInForeground = true;
lifeCycleDelegate.onAppForegrounded();
}
}


@Override
public void onActivityPaused(Activity activity) {


}


@Override
public void onActivityStopped(Activity activity) {


}


@Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {


}


@Override
public void onActivityDestroyed(Activity activity) {


}


@Override
public void onTrimMemory(int level) {
if (level == ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN) {
// lifecycleDelegate instance was passed in on the constructor
appInForeground = false;
lifeCycleDelegate.onAppBackgrounded();
}
}


@Override
public void onConfigurationChanged(Configuration newConfig) {


}


@Override
public void onLowMemory() {


}
}

Now in a class extending Application

public class MyApplication extends Application implements
LifeCycleDelegate{
@Override
public void onCreate() {
super.onCreate();


AppLifecycleHandler lifeCycleHandler = new
AppLifecycleHandler(MyApplication.this);
registerLifecycleHandler(lifeCycleHandler);
}


@Override
public void onAppBackgrounded() {
Log.d("Awww", "App in background");
}


@Override
public void onAppForegrounded() {
Log.d("Yeeey", "App in foreground");
}


private void registerLifecycleHandler(AppLifecycleHandler lifeCycleHandler) {
registerActivityLifecycleCallbacks(lifeCycleHandler);
registerComponentCallbacks(lifeCycleHandler);
}
}

For More refer : https://android.jlelse.eu/how-to-detect-android-application-open-and-close-background-and-foreground-events-1b4713784b57

fun Context.isAppInForeground(): Boolean {


val application = this.applicationContext
val activityManager = this.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
val runningProcessList = activityManager.runningAppProcesses


if (runningProcessList != null) {
val myApp = runningProcessList.find { it.processName == application.packageName }
ActivityManager.getMyMemoryState(myApp)
return myApp?.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND
}


return false
}

If you are Using Kotlin

   private fun isAppRunning(context: Context, packageName: String): Boolean {
val activityManager = context.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
activityManager.runningAppProcesses?.apply {
for (processInfo in this) {
if (processInfo.processName == packageName) {
return true
}
}
}
return false
}