Best way to create slide down animation on Android app?

Question

I'm just getting into Android development and basically I have 5 rectangular buttons stacked on each other.

When I click one (let's say the top one), I want the other 4 to slide down, and another set of buttons or whatever to show between them.

And I want the transitions to be sliding rather than just appearing.

Any suggestions on how to implement that or what functions to use?

Answer 1

First you need to define the Animation in XML like this:

Slide down from the top:

<set xmlns:android="http://schemas.android.com/apk/res/android">  
    <translate android:fromYDelta="-100%" android:toYDelta="0%" android:duration="1000"/>
</set>

Slide up out of the screen:

<set xmlns:android="http://schemas.android.com/apk/res/android">  
    <translate android:fromYDelta="0%" android:toYDelta="-100%" android:duration="1000"/>
</set>

You can load the Animation like this:

Animation slide = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.slide_down);

And then you can apply the Animation to your View like this:

view.startAnimation(slide);