logo

License: MIT Download Twitter URL

Transitioner provides easy, dynamic and adjustable animations between two views with nested children.

App design feature here.

First you need to create a Transitioner object containing your original and ending views:

val transition = Transitioner(original_view, ending_view)

The view pairs must have matching "tag" attributes so that they can be bound together:

<ConstraintLayout
 android:id="@+id/original_view"
 android:tag="constrView"
 ...>
 <TextView
 android:id="@+id/text"
 android:tag="firstView"
 .../>
</ConstraintLayout>
<ConstraintLayout
 android:id="@+id/ending_view"
 android:tag="constrView"
 android:visibility="invisible"
 ...>
 <EditText
 android:id="@+id/text3"
 android:tag="firstView"
 .../>
 </ConstraintLayout>

I recommend you hide the second view layout, since it's only used as a placeholder for the end destination. The views can be of any type, you can mix and match them, the two layouts can have a different number of views and nested layouts are 100% supported. The only things to keep in mind are:

• all views which you would want to match together must have the same tag attribute in both layouts

• all unmatched views will remain at their original place inside the original layout

• the second layout is just a placeholder. It doesn't hold any logic, it only shows where the original layout should move to.

 transition.setProgress(0.5f)
 //or
 transition.setProgress(50)

transition.duration = 500
transition.interpolator = AccelerateDecelerateInterpolator()
transition.animateTo(percent = 0f)
transition.onProgressChanged {
//triggered on every progress change of the transition
 seekBar.progress = (it * 100).toInt()
 }
 
val progress: Float = transition.currentProgress

Here is a preview of a simple application made using this library

Preview

This effect can be reproduced by placing the "Transitioner.setProgress(Float)" function inside a onTouch or a onProgressChanged method.

The recommended way to download is to copy the single library class file and use it in your application.

dependencies {
 compile 'bg.devlabs.transitioner:transitioner:<latest_version>'
}

Dev Labs @devlabsbg

Radoslav Yankov @rado__yankov

Under MIT License.