Android - Onbackpressed() Not Working

Android onBackPressed() is not being called?

This question is already answered, but I feel to clear something here in this topic. Most comments and answeres point out to use super.onBackPressed() and that this is the cause of the not working method onBackPressed(). But that is not correct and important to let other beginners know. The method onBackPressed() does not need to use super.onBackPressed() . onBackPressed()also works if somebody, for example, comment super.onBackPressed() out.

As the questionier has written, he won´t use super.onBackPressed() because it will close the activity. So, the cause of this why it isn´t working, could be seperated into three possible causes:

1. The Log doesn´t work because of a wrong filter in the logcat console
2. The Toast dosn´t work because of the wrong passed context
3. The OS is implemented wrong by the supplier.

Usually, the toast works by passing the correct context. In the case of questioner, simply passing this .

@Override
public void onBackPressed() {
    Log.d("MainActivity","onBackPressed");
    Toast.makeText(this,"onBackPressed",Toast.LENGTH_SHORT).show();
}

For the Log, simply set the correct filter on logcat.

I don´t care if somebody give downvotes now, but it must be clear for other beginners, that super.onBackPressed() must not be used.

Anyway, the use of onKeyDown() also is a solution.

android - onBackPressed() not working for me

Update - 19th June 2022

The below answer is outdated. We can use the navigation architecture components with toolbar so the back navigation is handled for us or you should check https://developer.android.com/guide/navigation/navigation-custom-back

For navigation architecture components check

https://developer.android.com/guide/navigation/navigation-getting-started

Navigation components are available for compose as well
https://developer.android.com/jetpack/compose/navigation

Old Answer - Outdated

I would suggest you to use ActionBar as suggested by WarrenFaith in the comments below. Pls check the link below for more information

http://developer.android.com/design/patterns/navigation.html

Here's a tutorial for the same

http://www.vogella.com/articles/AndroidActionBar/article.html

You can use this. However this also seems to be a bad design. You can check the comments below to know why

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        onBackPressed();
    }
    return super.onKeyDown(keyCode, event);
}

public void onBackPressed() {
    Intent myIntent = new Intent(MyActivity.this, MainActivity.class);

    myIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(myIntent);
    finish();
    return;
}

Onn back button pressed inn your current activity when you back press you clear the activity stack and naviagate to MainActivity.

Also i would suggest no to display a alert dialog on back button press. Its a bad design. You can search on SO. i read the same and was answered by commonsware

Android onBackPressed() not working

Try something from this link:

Key Events in TabActivities?

Each tab's Activity handled the "back" presses.

Why is onBackPressed() not being called?

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);
    }
}    

onBackPressed() method not triggered in AppCompatActivity

In your manifest file define the following inside your activity tag:

<meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value="com.example.ParentActivity" />

After that in your activity:

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            NavUtils.navigateUpFromSameTask(this);
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

Android: onBackPressed is not called when EditText is focused

EditText has it's own listener and on back pressed method that responds when the editing window is active. onBackPressed() method works when the activity itself is directly listening for clicks.

Android: onBackPressed not being recognized

You have to put it on an Activity, don't forget to call @Override

@Override
public void onBackPressed()
{
     super.onBackPressed();  //if you want to do something new remove this line
}

The problem is that you have to place the onBackPressedMethod() outside, as follows :

public class player1 extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_player1);
        final MediaPlayer mp = MediaPlayer.create(this, R.raw.mozardpianosonata); //create mediaplayer with song
        ImageButton yButton = (ImageButton) findViewById(R.id.imageButton5);
        yButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) { //play music on click
                if (mp.isPlaying()) {
                    mp.pause();
                } else {
                    mp.start();
                }
            }
        });
    }
    @Override
    public void onBackPressed(){ //this is not working
                if(mp.isPlaying())
                {
                    mp.stop(); // stop music on backpress
                }
                //if you want to do the back action aswell, uncomment the following line
                //super.onBackPressed();
            }

onActivityResult not working with onBackPressed?

You need to return the result when you press the ActionBar back/home button, but you added the code in the bottom back button.

So, transfer the code in Activity2 to be handled when the ActionBar back button is pressed, so Override onOptionsItemSelected, and the home button has an id of android.R.id.home.

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == android.R.id.home) {
        Intent intent = new Intent(this, Activity1.class);
        intent.putExtra("MESSAGE", "Hello from Activity 2!");
        Log.i("TEST", "Setting result...");
        setResult(RESULT_OK, intent);
        finish();
        return true;
    }
    return super.onOptionsItemSelected(item);
}

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