ActionBar up button transition effect

Question

I have already created a method for an animation when changing activities when the back button is pressed. The problem is that the actionbar up button has the default transition effect to the previous activity and I can't find a way to override that animation and use a new one. Any ideas? Thanks in advance

Preferably this would be hardcoded in java

Answer 1

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

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

@Override
public void onBackPressed() {
    this.finish();
    overridePendingTransition(R.anim.fade_in, R.anim.right_slide_out);
}

fade_in.xml (R.anim.fade_in)

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="300"
    android:fromAlpha="0.0"
    android:interpolator="@android:anim/accelerate_interpolator"
    android:toAlpha="1.0" />

right_slide_out.xml (R.anim.right_slide_out)

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_decelerate_interpolator">
    <translate
        android:duration="200"
        android:fromXDelta="0"
        android:toXDelta="100%p" />
</set>

Answer 2

Just get the event "home back"

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    if (item.getItemId() == android.R.id.home) {
        finish();
        overridePendingTransition(R.animator.anim_left, R.animator.anim_right);
        return true;
    }
    return false;
}