How to Reverse Fragment Animations on BackStack?

问题:

I thought the system would reverse animations on the backstack when the back button is pressed when using fragments using the following code:

FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.setCustomAnimations(R.anim.slide_in, R.anim.hyperspace_out);
ft.replace(R.id.viewContainer, new class(), "layout").addToBackStack(null).commit();

回答1:

According to the android documentation for custom animation:

Change:

ft.setCustomAnimations(R.anim.slide_in, R.anim.hyperspace_out);

To:

ft.setCustomAnimations(R.anim.slide_in, R.anim.hyperspace_out, R.anim.hyperspace_in, R.anim.slide_out );

and now the backstack animates - In reverse!!

回答2:

Use the Correct animation I have used the following and its working like a charm

slide_in_left.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_mediumAnimTime" >
    <objectAnimator
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="500"
        android:propertyName="x"
        android:valueFrom="1000"
        android:valueTo="0"
        android:valueType="floatType" />
</set>

slide_in_right.xml

 <?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_mediumAnimTime" >

    <objectAnimator
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="500"
        android:propertyName="x"
        android:valueFrom="0"
        android:valueTo="1000"
        android:valueType="floatType" />

</set>

slide_out_left.xml

   <set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_mediumAnimTime" >

    <objectAnimator
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="500"
        android:propertyName="x"
        android:valueFrom="0"
        android:valueTo="-1000"
        android:valueType="floatType" />

</set>

slide_out_right.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_mediumAnimTime" >

    <objectAnimator
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="500"
        android:propertyName="x"
        android:valueFrom="-1000"
        android:valueTo="0"
        android:valueType="floatType" />

</set>

Then Use following while adding fragment

setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_left,
                                R.anim.slide_out_right, R.anim.slide_in_right)

and it will worked 100%

回答3:

in my case

ft.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right, 
                       R.anim.slide_in_right, R.anim.slide_out_left);

would create perfect animation.

slide_in_right

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromXDelta="50%p" android:toXDelta="0"
               android:duration="@android:integer/config_mediumAnimTime"/>
    <alpha android:fromAlpha="0.0" android:toAlpha="1.0"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>

slide_out_left

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromXDelta="0" android:toXDelta="-50%p"
               android:duration="@android:integer/config_mediumAnimTime"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="0.0"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>

回答4:

.setCustomAnimations(R.animator.fragment_fade_in,
        R.animator.fragment_fade_out,
        R.animator.fragment_fade_p_in,
        R.animator.fragment_fade_p_out)

Replace the above with:

mFragmentManager.beginTransaction()
    .setCustomAnimations(R.animator.fragment_fade_in,
            R.animator.fragment_fade_out,
            R.animator.fragment_fade_p_in,
            R.animator.fragment_fade_p_out)
    .replace(R.id.main_container, FragmentPlayerInfo.getInstance(data))
    .addToBackStack(FragmentPlayerInfo.TAG)
    .commit();