CODEWITHSUNDEEP
androidandroid-activityandroid-task
Keith Mak
Keith Mak

Reputation: 453

Android: Default actions of Back Button

I know that when we press back button, the default function onBackPressed() is called.

http://developer.android.com/reference/android/app/Activity.html#onBackPressed()

This doc say that "The default implementation simply finishes the current activity". What does it means, does it mean the default onBackPressed() include the function finish()?

What is the implementation inside finish()? Is that onDestroy()?

Upvotes: 0

Views: 1945

Answers (1)

Damian Petla
Damian Petla

Reputation: 9103

This is how implementation looks like:

public void onBackPressed() {
    if (!mFragments.popBackStackImmediate()) {
        finish();
    }
}

Of course on Android 2.3 and lower it's like this:

public void onBackPressed() {
     finish();
}

There was no Fragments API.

You can always check sources yourself in your IDE or on the web

Upvotes: 5

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