Quick Trick — Use Android’s Animated Vector Drawable as ProgressBar
Android’s ProgressBar widget comes with lot of customization controls and flexibility to set custom animated drawable. However, setting AnimatedVectorDrawable is not one of the option.
So, this is a quick trick on how to use custom ImageView to create indeterminate progress indicator using Animated Vector Drawable (AVD).
class AvdLoadingProgressBar @JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : AppCompatImageView(context, attrs, defStyleAttr) {
private val avd = AnimatedVectorDrawableCompat.create(context, R.drawable.avd_anim)!!
init {
setImageDrawable(avd)
avd.registerAnimationCallback(object : Animatable2Compat.AnimationCallback() {
override fun onAnimationEnd(drawable: Drawable?) {
post { avd.start() }
}
})
avd.start()
}
}
NOTE: The idea of repeated indefinite AVD is heavily borrowed from Nick Butcher’s medium article on AVD. I highly recommend you read them to know more tips and ticks with AVD.
That’s it. You can now use this in your layout as usual view and show it when data is loading from network or any long running async request is happening.
<androidx.constraintlayout.widget.ConstraintLayout> <dev.hossain.avdprogress.AvdLoadingProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/avd_anim_kijiji_loading" /></androidx.constraintlayout.widget.ConstraintLayout>