Smooth text change in android animation

Question

I want to add animation in android text view so that when a text changes it should change smoothly and slowly. Like, fade in or fade out when the text changes. Is it possibl

Answer 1

This is my extension for fadOut fadIn a new text.

// TextViewExtensions

fun TextView.setTextAnimation(text: String, duration: Long = 300, completion: (() -> Unit)? = null) {
    fadOutAnimation(duration) {
        this.text = text
        fadInAnimation(duration) {
            completion?.let {
                it()
            }
        }
    }
}

// ViewExtensions

fun View.fadOutAnimation(duration: Long = 300, visibility: Int = View.INVISIBLE, completion: (() -> Unit)? = null) {
    animate()
            .alpha(0f)
            .setDuration(duration)
            .withEndAction {
                this.visibility = visibility
                completion?.let {
                    it()
                }
            }
}

fun View.fadInAnimation(duration: Long = 300, completion: (() -> Unit)? = null) {
    alpha = 0f
    visibility = View.VISIBLE
    animate()
            .alpha(1f)
            .setDuration(duration)
            .withEndAction {
                completion?.let {
                    it()
                }
            }
}

• Example :

textView. setTextWithAnimation("Hello world", 500)