CounterTextView

As a part of development of Minitris there was a need for a score display that would indicate to the user that the score is increasing and would provide a visual feedback.

Introducing CounterTextView

It is a standard TextView subclass driven by RxJava Observable.interval towards defined numerical target, which you can specify either by standard setTarget(long target) or you can tie it to your Rx stream via public Action1<Long> targetAction() (RxJava1) or Consumer<Long> targetConsumer() (RxJava2) respectively.

Samples

You can see usage examples in sample-rxjava1 and sample-rxjava2 modules.

Usage

Add Jetpack.io repository to your project level build.gradle:

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

and add one of these dependencies:

RxJava1 based:

dependencies {
        implementation 'com.github.ursimon.CounterTextView:library-rxjava1:1.0.2'
        implementation 'com.github.ursimon.CounterTextView:library-common:1.0.2'
}

RxJava2 based:

dependencies {
        implementation 'com.github.ursimon.CounterTextView:library-rxjava2:1.0.2'
        implementation 'com.github.ursimon.CounterTextView:library-common:1.0.2'
}

Then you can declare it in your XML layout similar to standard TextView:

    <cz.ursiny.countertextview.library.CounterTextView
        android:id="@+id/counter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:numberFormat="true"
        app:speed="100"
        />

It can take up two optional xml parameters:

param	value	description
numberFormat	true/false	whether you want to be number formatted by default NumberFormat.getInstance().format
speed	int	speed of Observable.interval ticking to animate towards target, default 25 milliseconds

From code

You can use base method:

setTarget(long target) and that will trigger animation towards it or will retarget currently running one

or you can tie it to your rx stream directly using Action1<Long>, Consumer<Long> depending on RxJava1/RxJava2 implementation you choose to use