CODEWITHSUNDEEP
androidandroid-studio
kkimble006
kkimble006

Reputation: 137

Why is onBackPressed() not being called?

I am attempting to override onBackPressed(). However it appears to not detect when I click the back button in the action bar.

I currently have this code:

@Override
public void onBackPressed()  {

    Log.i("DATA", "Hit onBackPressed()");
    super.onBackPressed();

}

The log message never appears in the LogCat. I know that this log statement works because it is copied from another method with a different message that DOES display in the LogCat.

I have searched for answers, and I have tried using onKeyDown and detecting if it is the BACK button being clicked but I still have the same issue. Information about the project:

Any help would be greatly appreciated!!

EDIT:

This is a copy of my working code (this is test code so the activity name is not descriptive):

public class MainActivity2 extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_activity2);
    getActionBar().setDisplayHomeAsUpEnabled(true);//Displays the back button
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main_activity2, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:

            Log.i("DATA", "Hit Actionbar Back Button");

            return true;

        default:
            return super.onOptionsItemSelected(item);
    }
}

}

The message "Hit Actionbar Back Button" now appears in the LogCat.

Upvotes: 10

Views: 8611

Answers (2)

Krunal Indrodiya
Krunal Indrodiya

Reputation: 792

Please try this code,

public class MainActivity2 extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}


@Override
public void onBackPressed() {
    // TODO Auto-generated method stub
    super.onBackPressed();

    Toast.makeText(getApplicationContext(), "back press is call", Toast.LENGTH_LONG).show();
}
}

Upvotes: 0

aga
aga

Reputation: 29416

onBackPressed() is invoked when user clicks on a hardware back button (or on the 'up' button in the navigation bar), not the button in the action bar. For this one you need to override onOptionsItemSelected() method. Example:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            // click on 'up' button in the action bar, handle it here
            return true;

        default:
            return super.onOptionsItemSelected(item);
    }
}

Upvotes: 25

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