问题描述:

I post a question here because I can't find out a solution to my problem. I read a lot of things about android animation.

I actually develop an android 4.0 app and I need to animate transition between fragments (not layout).

Similary post, worked with layout but no more precision about fragments

Here my uncomplete code :

Activity code

private void showFragment(final Fragment fragment)

{

if (null == fragment)

return;

FragmentTransaction ft = getFragmentManager().beginTransaction();

ft.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_right);

ft.replace(R.id.fragment_container_layout, fragment, fragment.getClass().getSimpleName()).commit();

}

R.anim.slide_in_left

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

android:duration="@android:integer/config_mediumAnimTime">

<translate

android:fromXDelta="100%p"

android:toXDelta="0" />

<alpha

android:fromAlpha="0.0"

android:toAlpha="1.0" />

</set>

And finally R.anim.slide_out_right

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android"

android:duration="@android:integer/config_mediumAnimTime" >

<translate

android:fromXDelta="0"

android:toXDelta="-100%p" />

<alpha

android:fromAlpha="1.0"

android:toAlpha="0.0" />

</set>

When I run this code, I got an exception :

12-27 15:26:55.566: E/AndroidRuntime(27699): java.lang.RuntimeException: Unknown animator name: translate

Do you have any idea to fix this ?

网友答案:

Problem solved!

Like Piyush Gupta said, I must have a custom subclass of FrameLayout per Fragment I need to animate, first.

Secondly, I must not use R.anim but R.animator like another similar post (link in question).

Thank you all !

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