To animate the transition between fragments, or to animate the process of showing or hiding a fragment you use the Fragment Manager to create a Fragment Transaction . Within each Fragment Transaction you can specify in and out animations that will be used for show and hide respectively (or both when replace is used).
Use replace() to replace an existing fragment in a container with an instance of a new fragment class that you provide. Calling replace() is equivalent to calling remove() with a fragment in a container and adding a new fragment to that same container. transaction. commit();
Android's transition framework allows you to animate all kinds of motion in your UI by simply providing the starting layout and the ending layout.
You need to use the new android.animation
framework (object animators) with FragmentTransaction.setCustomAnimations
as well as FragmentTransaction.setTransition
.
Here's an example on using setCustomAnimations
from ApiDemos' FragmentHideShow.java:
ft.setCustomAnimations(android.R.animator.fade_in, android.R.animator.fade_out);
and here's the relevant animator XML from res/animator/fade_in.xml:
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:interpolator/accelerate_quad"
android:valueFrom="0"
android:valueTo="1"
android:propertyName="alpha"
android:duration="@android:integer/config_mediumAnimTime" />
Note that you can combine multiple animators using <set>
, just as you could with the older animation framework.
EDIT: Since folks are asking about slide-in/slide-out, I'll comment on that here.
You can of course animate the translationX
, translationY
, x
, and y
properties, but generally slides involve animating content to and from off-screen. As far as I know there aren't any transition properties that use relative values. However, this doesn't prevent you from writing them yourself. Remember that property animations simply require getter and setter methods on the objects you're animating (in this case views), so you can just create your own getXFraction
and setXFraction
methods on your view subclass, like this:
public class MyFrameLayout extends FrameLayout {
...
public float getXFraction() {
return getX() / getWidth(); // TODO: guard divide-by-zero
}
public void setXFraction(float xFraction) {
// TODO: cache width
final int width = getWidth();
setX((width > 0) ? (xFraction * width) : -9999);
}
...
}
Now you can animate the 'xFraction' property, like this:
res/animator/slide_in.xml:
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/linear_interpolator"
android:valueFrom="-1.0"
android:valueTo="0"
android:propertyName="xFraction"
android:duration="@android:integer/config_mediumAnimTime" />
Note that if the object you're animating in isn't the same width as its parent, things won't look quite right, so you may need to tweak your property implementation to suit your use case.
I have done this way:
Add this method to replace fragments with Animations:
public void replaceFragmentWithAnimation(android.support.v4.app.Fragment fragment, String tag){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.setCustomAnimations(R.anim.enter_from_left, R.anim.exit_to_right, R.anim.enter_from_right, R.anim.exit_to_left);
transaction.replace(R.id.fragment_container, fragment);
transaction.addToBackStack(tag);
transaction.commit();
}
You have to add four animations in anim folder which is associate with resource:
enter_from_left.xml:
<?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>
exit_to_right.xml:
<?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>
enter_from_right.xml:
<?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>
exit_to_left.xml:
<?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>
Output:
Its Done.
If you can afford to tie yourself to just Lollipop and later, this seems to do the trick:
import android.transition.Slide;
import android.util.Log;
import android.view.Gravity;
.
.
.
f = new MyFragment();
f.setEnterTransition(new Slide(Gravity.END));
f.setExitTransition(new Slide(Gravity.START));
getFragmentManager()
.beginTransaction()
.replace(R.id.content, f, FRAG_TAG) // FRAG_TAG is the tag for your fragment
.commit();
Kotlin version:
f = MyFragment().apply {
enterTransition = Slide(Gravity.END)
exitTransition = Slide(Gravity.START)
}
fragmentManager
.beginTransaction()
.replace(R.id.content, f, FRAG_TAG) // FRAG_TAG is the tag for your fragment
.commit();
Hope this helps.
Nurik's answer was very helpful, but I couldn't get it to work until I found this. In short, if you're using the compatibility library (eg SupportFragmentManager instead of FragmentManager), the syntax of the XML animation files will be different.
Here's a slide in/out animation between fragments:
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.setCustomAnimations(R.animator.enter_anim, R.animator.exit_anim);
transaction.replace(R.id.listFragment, new YourFragment());
transaction.commit();
We are using an objectAnimator.
Here are the two xml files in the animator subfolder.
enter_anim.xml
<?xml version="1.0" encoding="utf-8"?>
<set>
<objectAnimator
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1000"
android:propertyName="x"
android:valueFrom="2000"
android:valueTo="0"
android:valueType="floatType" />
</set>
exit_anim.xml
<?xml version="1.0" encoding="utf-8"?>
<set>
<objectAnimator
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1000"
android:propertyName="x"
android:valueFrom="0"
android:valueTo="-2000"
android:valueType="floatType" />
</set>
I hope that would help someone.
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