What function runs when we press back arrow?

Question

I have an activity that when the user press back arrow doing some thing. When you press the back button on the phone, it does the finish () method, but it doesn't happen when you press the back arrow. How to fix it?

I'm sorry for the grammatical errors. I would be happy if you remind me of the bad ones.

On back arrow click call this function `super.onBackPressed()` — Jignesh Mayani, Sep 04 '19 at 08:37
Possible duplicate of [Android - How To Override the "Back" button so it doesn't Finish() my Activity?](https://stackoverflow.com/questions/3141996/android-how-to-override-the-back-button-so-it-doesnt-finish-my-activity) — peco, Sep 04 '19 at 08:39

Aiko West · Accepted Answer · 2019-09-04T08:44:33.263

0

are you looking for

Xamarin.Android:

public override void OnBackPressed()
{
    // do something on backbutton pressed
}

Java:

@Override
public void onBackPressed()
{
     // code here to show dialog
     super.onBackPressed();  // optional depending on your needs
}

edited Sep 04 '19 at 08:44

answered Sep 04 '19 at 08:38

Aiko West

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@Enzokie Kotlin – digiwizkid Sep 04 '19 at 08:43

score 0 · Answer 2 · answered Sep 04 '19 at 08:51

If you want the same behavior for the back button. Add this code.

Java Code

 @Override
 public boolean onOptionsItemSelected(@NonNull MenuItem item) {
    if (item.getItemId() == android.R.id.home) {
        YourActivity.this.onBackPressed();
    }
    return super.onOptionsItemSelected(item);
}

Kotlin Code

override fun onOptionsItemSelected(item: MenuItem): Boolean {
    if (item.itemId == android.R.id.home) {
        this@YourActivity.onBackPressed()
    }
    return super.onOptionsItemSelected(item)
}

What function runs when we press back arrow?

2 Answers2