Animations for the app

I would like to have general animations (transitions) between my activities. There are many possibilities. Use TransitionManager, use Activity#overridePendingTransition(), use ActivityOptions, FragmentTransaction#setCusotmAnimation()...

One general solution would be:

<style name="ActivityAnimations" parent="@android:style/Animation.Activity">
<item name="android:activityOpenEnterAnimation">@anim/slide_up_in</item>
<item name="android:activityOpenExitAnimation">@null</item>
<item name="android:activityCloseEnterAnimation">@null</item>
<item name="android:activityCloseExitAnimation">@anim/slide_out_right</item>
</style>

and apply in the base theme:

<item name="android:windowAnimationStyle">@style/ActivityAnimations</item>

To understand what those means, here is an excerpt from here

int	activityCloseEnterAnimationWhen closing the current activity, this is the animation  that is run on the next activity (which is entering the screen).
int	activityCloseExitAnimationWhen closing the current activity, this is the animation that is run on the current activity (which is exiting the screen).
int	activityOpenEnterAnimationWhen opening a new activity, this is the animation that is run on the next activity (which is entering the screen).
int	activityOpenExitAnimationWhen opening a new activity, this is the animation that is run on the previous activity (which is exiting the screen).

<!-- In case we need to generalize for the fragments
<item name="fragmentOpenEnterAnimation">@animator/fragment_open_enter</item>
<item name="fragmentOpenExitAnimation">@animator/fragment_open_exit</item>
<item name="fragmentCloseEnterAnimation">@animator/fragment_close_enter</item>
<item name="fragmentCloseExitAnimation">@animator/fragment_close_exit</item>-->