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XML FadeOut Animation not working

I have a generic FadeOut animation that is used on a lot of other things. I took out a button and switched it to a new button leaving the onClick the same. The only difference is position and src:Image. What I mean by not working is that it just goes to view gone and doesn't fadeout. it worked as intended with the other button but not this one
MainActivity
public void onPreferenceClose(View view){
FadeOut = AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out);
FadeIn = AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in);
if(preferences.getVisibility() == View.VISIBLE){
preferences.startAnimation(FadeOut);
preferences.setVisibility(View.GONE);
preferences.clearAnimation();
w_Toolbar.startAnimation(FadeIn);
w_Toolbar.setVisibility(View.VISIBLE);
p_Web.setClickable(false);
}
}
xml
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:fillBefore="true"
android:fillAfter="true"
android:duration="350">
<alpha
android:fromAlpha="1.0"
android:toAlpha="0.0"
/>

your Fadeout animation is working but as you are setting the visibility (preferences) to gone it doesnt show animation ..because it makes it Gone first.. dont use setVisibility to Gone it isnt required for fadeout anim.. it will automatically do that for you ...or you can use listeners for your animation and at the end of animation make the view Gone
`
<alpha
android:duration="1000"
android:fromAlpha="1.0"
android:interpolator="#android:anim/accelerate_interpolator"
android:toAlpha="0.0" />
`
use this code for anim..
done forget to use android:fillAfter="true" > in set ...
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >

remove this line.
preferences.clearAnimation();
your animation started and was cleared, that's why you cant see it

Animation lagging after some time android

I have custom bottom menubar. I am trying to implement animation on view visible. my code is like below
Animation slideUp = AnimationUtils.loadAnimation(CardMainActivity.this, R.anim.slide_up);
ll_fonttextview.setAnimation(slideUp);
ll_fonttextview.setVisibility(View.VISIBLE);
and XML like this
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="500"
android:fromYDelta="100%"
android:toYDelta="0" />
</set>
Its working fine but after some click, its stop showing animation. I am not getting any error for that. Let me know if anyone have idea to fix it.
Thanks

Android Animation when change page

I am trying to switch from my "activity_main.xml" to a second .xml after a button click. I have already connected the button and put in setContentView(R.layout.view) and it works but I want it to animate. I want the view to come from the right and then the opposite when the user press back. I need a animation like a change of page in a book, I am doing this in eclipse if that helps.

I'm not sure how to get a "change of page in a book" animation, but here is how you would implement a slide in/slide out animation between activities which looks pretty good.
First, create two different XML files for the sliding animation. One for sliding in:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false" >
<translate
android:fromXDelta="-100%" android:toXDelta="0%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="700"/>
</set>
...and one for sliding out:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false" >
<translate
android:fromXDelta="0%" android:toXDelta="100%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="700" />
</set>
Now you can use these animations each time you press a button (or whatever your app does to move between activities) like so:
public void onClick(View v)
{
// set the animation to move once the button is clicked
overridePendingTransition(R.anim.slide_out, R.anim.slide_in);
Intent i = new Intent(MoveFromThisClass.this, MoveToThisCLass.class);
}
To move back to the previous class, just swap the slide_in and slide_out like this:
overridePendingTransition(R.anim.slide_in, R.anim.slide_out);
Hope this helps.
UPDATE (for the second part of your question):
"animation like a change of page in a book", i think you mean page curl annimation. if is that what you are looking for, you can use this library

Android: AlphaAnimation - no duration

I just want to create a fade out effect on a VideoView object.
The problem: Although I did set a certain duration for the animation, it looks like there's no duration. The VideoView object disappears immediately..
Things I've already tried:
AlphaAnimation anim = new AlphaAnimation(1, 0);
anim.setDuration(2000);
anim.setFillAfter(true);
mVideoView.setVisibility(View.VISIBLE);
mVideoView.startAnimation(anim);
the second try:
Animation anim = AnimationUtils.loadAnimation(this, R.anim.fadeout);
anim.setFillAfter(true);
mVideoView.startAnimation(anim);
in fadeout.xml:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
>
<alpha
android:fromAlpha="1.0"
android:toAlpha="0.0"
android:duration="2000"
/>
</set>
I'd be glad if someone could help me here.

Ok, I'm not entirely sure VideoView supports this kind of animation.
I did a workaround by fading in a black ImageView object...yeah, it's not best solution.
But the effect is the same :D
Another way would be to create a screenshot, deactivate the VideoView and then to let the screenshot fade out.

Slide in another XML layout when button is clicked

I have a main.xml layout file and in my Java code, I am doing some calculation taken from the main layout and wanting to display in result.xml layout file. I know I can use the anim folder to hold the animation to slidei n the result layout like the following:
left to right:
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<translate android:fromXDelta="-100%" android:toXDelta="0%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="700"/>
</set>
right to left:
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<translate
android:fromXDelta="0%" android:toXDelta="100%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="700" />
</set>
I was wondering how to implement the above so when the button is clicked on the main layout file, the result layout file slides in from the right. And also if I wanted to go back to the main layout I can press a button (added on result layout) to slide right the main layout file

You can also use this function : overridePendingTransition which can define an animation for the upcoming activity and an other animation for the activity which exit.
Use it like this, in your second Activity :
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
overridePendingTransition(android.R.anim.slide_out_right, 0);
setContentView(R.layout.myLayout);
first argument is for the animation enter, and 0 is for no animation.
And for an animation when you leave your second activity :
#Override
public void finish() {
super.finish();
overridePendingTransition(R.anim.enterAnim, R.anim.leaveAnim);
}

You can always use default stock animations supplied by Android framework.
Heres an example code:
boolean isFirstXml=evaluatingConditionFunction();
LayoutInflater inflator=getLayoutInflater();
View view=inflator.inflate(isFirstXml?R.layout.myfirstxml:R.layout.myseconxml, null, false);
view.startAnimation(AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right));
setContentView(view);
Call this from any of your activity which holds your Parent View.
For custom animations you can visit developer docs. Heres the documentation link.