fragments, android:zAdjustment (z order) and animations

Question

I\'m using the support library. Now, I want to have a fragment shifting in from the bottom, moving OVER the previous one.

For this I use this to keep the previous fragme

Answer 1

You can override the onCreateAnimation method and for any animations you can check what animation is currently running and if you need it to be on top, set the Z-axis from there.

override fun onCreateAnimation(transit: Int, enter: Boolean, nextAnim: Int): Animation? {
    if (nextAnim == R.anim.enter_from_right || nextAnim == R.anim.exit_to_right) {
        ViewCompat.setTranslationZ(view, 1f)
    } else {
        ViewCompat.setTranslationZ(view, 0f)
    }

    return super.onCreateAnimation(transit, enter, nextAnim)
}

Recommend implementing this as a base Fragment class for all your fragments.