I want to start bounce scale animation of textview every activity's onResume. I noticed that sometimes text doesnt'show during textview scaling animation. I see only background of that textview. This bug appears only on some devices: few Xiaomi models, one Samsung, one Pixel. Works good on emulator. I am using Animator
. I tried Animation
class and bug still exists.How can I fix this?
My Activity code:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
}
override fun onResume() {
super.onResume()
playAnimation()
}
private fun playAnimation() {
val textView = findViewById<TextView>(R.id.textView)
textView.scaleX = 0f
textView.scaleY = 0f
val badgeAnimator = ValueAnimator.ofFloat(0f, 1f
).apply {
duration = 800L
interpolator = BounceInterpolator()
addUpdateListener { animation ->
val value = animation.animatedValue as Float
textView.scaleX = value
textView.scaleY = value
}
}
val animatorSet = AnimatorSet()
animatorSet.apply {
startDelay = 1500L
play(badgeAnimator)
start()
}
}
}
Activity xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:textColor="@color/white"
android:paddingHorizontal="10dp"
android:background="@drawable/bg_badge_count_v2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
I found that if i valueanimator with start value 0.01f instead of 0f bug dissappears. That works with animation class too. I think that something in android system clears text in TextView when scaleX and scaleY are zero.
So 0.01f I think is ok, because it is not visible for user and looks the same as 0f