I posted this on stack overflow a little over a week ago and got no
response so I will ask here.
I have an activity with a slidingdrawer that comes up as a menu. when
the activity starts the button (it is actually not a button but a
textview but that is really irrelevant) with an is there and fades
out to allow a full screen view. when the button on top of the drawer
is clicked (it has alpha of 0 at this point) it should fade back in
and the menu popup. when clicked again the menu collapses and the
button fades back out. to do this I have the following code in the
activity.
The initial fadeout works as expected. The activity is created and the
button fades out. when I click the button to expand the menu the
button does not appear and when I click it again the button is there
and does not fade out. The odd thing is that the animation is in fact
called and if I move the scrolviews behind the drawer while the
animation after the animatin is called the animation does go on
normally as long as I keep the views in its background moving. If I
stop moving those views the animation will freeze at some alpha value.
Why does the first function normally while the others do not? How do I
fix this?
drawer = (SlidingDrawer) this.findViewById(R.id.slidingDrawer1);
drawer.setOnDrawerCloseListener(new OnDrawerCloseListener(){
public void onDrawerClosed() {
doFadeOut();
}
});
drawer.setOnDrawerOpenListener(new OnDrawerOpenListener(){
public void onDrawerOpened() {
doFadeIn();
}
});
fadeOut = AnimationUtils.loadAnimation(this, R.anim.buttonfadeout);
fadeOut.setFillAfter(true);
fadeIn = AnimationUtils.loadAnimation(this, R.anim.buttonfadein);
fadeIn.setFillAfter(true);
doFadeOut(); //this is the end of onCreate and fades when the
activity is created
and these are methods in the activity
public void doFadeOut(){
fadeOut.reset();
menuButton.clearAnimation();
menuButton.startAnimation(fadeOut);
}
public void doFadeIn(){
fadeIn.reset();
menuButton.clearAnimation();
menuButton.startAnimation(fadeIn);
}
fadein anim
<alpha xmlns:android="http://schemas.android.com/apk/res/android";
android:duration="500"
android:fromAlpha="0.0"
android:toAlpha="1.0"
android:fillEnabled="true"
android:fillAfter="true" />
fadeout anim
<alpha xmlns:android="http://schemas.android.com/apk/res/android";
android:duration="2000"
android:fromAlpha="1.0"
android:toAlpha="0.0"
android:fillEnabled="true"
android:fillAfter="true"/>
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