I am trying to get a button to fade in and out continuously and I cant seem to figure it out.
In the OnCreate:
Button playbtn =(Button) findViewById(R.id.playbutton);
Animation myFadeInAnimation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.tween);
playbtn.startAnimation(myFadeInAnimation);
tween xml file:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha
android:fromAlpha="0.0"
android:toAlpha="1.0"
android:duration="1000"
android:repeatMode="reverse"
android:repeatCount="infinite" />
</set>
Thanks for your help.
You can do this:
private void fadeIn() {
ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(mButton, "alpha", 0f, 1f);
objectAnimator.setDuration(500L);
objectAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
fadeOut();
}
});
objectAnimator.start();
}
private void fadeOut() {
ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(mButton, "alpha", 1f, 0f);
objectAnimator.setDuration(500L);
objectAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
fadeIn();
}
});
objectAnimator.start();
}
You can improve by consolidating both methods into a single one by keeping track of the state (fading in, fading out). You should also add a function to cancel the animation (you can return the animator from these functions and then call cancel on it).
Edit: to cancel, you can do this - create a member variable that holds your current animator, then simply can cancel on it:
private ObjectAnimator objectAnimator;
private void fadeOut() {
objectAnimator = ObjectAnimator.ofFloat(mButton, "alpha", 1f, 0f);
objectAnimator.setDuration(500L);
objectAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
fadeIn();
}
});
objectAnimator.start();
}
private void cancelAnimator() {
if (objectAnimator != null) {
objectAnimator.cancel();
objectAnimator = null;
}
}
Your code works perfectly for me..
also you can do button fade in and out continuously in java
Using
myFadeInAnimation .setRepeatCount(Animation.INFINITE);
Hope this will helps you
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