Detect application foreground event [duplicate]

Question

Does anybody know some event listener for detecting when the application comes back to the foreground from the background? I searched a lot, but I didn't find such a listener. Any other solution is appreciated. Thank you!

Answer 1

You may need to be more specific about your use case.

Check out the Activity Lifecycle.

Both onResume(), and onStart() will get called when your activity comes to the foreground.

Edit: onRestart()?

Answer 2

I does something like this, in a BaseActivity

in onResume I check enterCount is equals 0 and then add the enterCount in onPause I delay the enterCount to decrease in 300ms, and it seems good when the onCreate isn't delay two long, or we can do something in onCreate to avoid the first time.

protected void onResume(){
         int  enterCount=GlobalManager.getInstance().getEnterCount();
        if(enterCount==0){
            //do some thing for first enter 
        }
        GlobalManager.getInstance().increaseEnterCount();
}

protected void onPause(){
        GlobalManager.getInstance().decreaseEnterCountDelay();

}