implementation 'com.williamyang:gradienttext:1.0.1'

buildscript {
    repositories {
        mavenCentral()
    }
}

implementation 'io.github.weilianyang:gradienttext:1.0.1'

<declare-styleable name="GradientTextView">
    <attr name="gradient_startColor" format="reference|color" />
    <attr name="gradient_endColor" format="reference|color" />
    <attr name="gradient_direction" format="enum">
        <enum name="leftToRight" value="1" />
        <enum name="topToBottom" value="2" />
    </attr>
    <attr name="gradient_animate" format="boolean" />
    <attr name="gradient_speed" format="enum">
        <enum name="slow" value="20" />
        <enum name="normal" value="10" />
        <enum name="fast" value="5" />
    </attr>
</declare-styleable>

<com.william.gradient.GradientTextView
    android:id="@+id/gradientTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="20dp"
    android:text="@string/leftToRight_GradientTextView"
    android:textSize="24sp"
    app:gradient_animate="true"
    app:gradient_direction="leftToRight"
    app:gradient_speed="normal" />

gradientTextView.apply {
    translateAnimate = !translateAnimate
    invalidate()
}