CODEWITHSUNDEEP
android
mani teja varma
mani teja varma

Reputation: 183

android: onActivityResult() order of execution

I am a newbie to android app development.So I am having confusion with onActivityResult() method.

In onCreate() method I made a button onClickListener which on clicked will call startActivityForResult for selection of images from gallery.
What does exactly happen after onClickListener is called.Does my previous activity restarts again by calling onCreate() method or resumes by calling onResume() method.But what I have seen is that still onCreate() method is responding while clicking button and taking me to gallery.
What is the exact order of execution of this one with activity life cycle?

Upvotes: 1

Views: 1233

Answers (3)

Krzysztof Turek
Krzysztof Turek

Reputation: 136

Overide all lifecycle methods (like onStart, onStop...) and add yours log if you want to know what happens with your Activity

something like that:

onStart(){
super.onStart();
Log.i("MyTag","onStart");
}

and look at LogCat with tag:MyTag :) also look at this https://github.com/xxv/android-lifecycle

Upvotes: 1

scubasteve623
scubasteve623

Reputation: 647

In this case, onRestart() -> onStart() -> onActivityResult() -> onResume() is what happens after choosing a picture from the gallery. An activity only needs to call onCreate() and assign onClickListeners once per life cycle.

Upvotes: 2

Jorge Mendez
Jorge Mendez

Reputation: 674

The only difference from calling startActivity vs startActivityForResult is that when your first activity is resumed, you will get a callback to onActivityResult (in case the second activity called explicitly to setResult()).

Regarding the lifecycle, after going back from your second activity (by finishing the image selection or clicking back button), your first activity will be resumed and not created again. You can review Activities lifecycle in Android documentation Activity Lifecycle

Upvotes: 0

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