Animating

Animating

step1:

creat directory

res/transition/

step2:

crate a file under the res/transition/,name is details_window_enter_transition.xml

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

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

   android:transitionOrdering="together"

   android:duration="500">

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

       <targets>

           <target android:excludeId="@android:id/statusBarBackground"/>

           <target android:excludeId="@android:id/navigationBarBackground"/>

       </targets>

   </fade>

   <slide android:slideEdge="top">

       <targets>

           <target android:targetId="@id/toolbar"/>

       </targets>

   </slide>

   <slide android:slideEdge="bottom">

       <targets>

           <target android:targetId="@id/detail_additional_pane"/>

       </targets>

   </slide>

</transitionSet >

Explain:

<targets>

           <target android:excludeId="@android:id/statusBarBackground"/>

           <target android:excludeId="@android:id/navigationBarBackground"/>

       </targets>

don’t want the animation apply on these two thing

<slide android:slideEdge="top">

       <targets>

           <target android:targetId="@id/toolbar"/>

       </targets>

mean slide in from the to ,the target is the @id/toolbar

step3:apply to the Apptheme

in the style file

because we just want this animaition just apply to the detail activity,so we cretae a new style

<style name="AppTheme.Details" parent="@style/AppTheme">

       <item name="android:windowContentTransitions">true</item>

       <item name="android:windowEnterTransition">@transition/details_window_enter_transition

       </item>

      

   </style>

step4:apply the AppTheme.Details at AndroidManifest

<activity

           android:name=".DetailActivity"

           android:label="@string/title_activity_detail"

           android:parentActivityName=".MainActivity"

           android:theme="@style/AppTheme.Details">

step5:change the code to call the start of detail activity

Intent intent = new Intent(this, DetailActivity.class)

                   .setData(contentUri);

           ActivityOptionsCompat activityOptions = ActivityOptionsCompat.makeSceneTransitionAnimation(this);

           ActivityCompat.startActivity(this, intent, activityOptions.toBundle());

**for the Mainactivity,only <item name="android:windowContentTransitions">true</item> is ok