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      1 /*
      2  * Copyright 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package androidx.leanback.preference;
     18 
     19 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
     20 
     21 import android.app.Fragment;
     22 import android.transition.Transition;
     23 import android.view.Gravity;
     24 
     25 import androidx.annotation.RequiresApi;
     26 import androidx.annotation.RestrictTo;
     27 import androidx.leanback.transition.FadeAndShortSlide;
     28 
     29 /**
     30  * @hide
     31  */
     32 @RequiresApi(21)
     33 @RestrictTo(LIBRARY_GROUP)
     34 public class LeanbackPreferenceFragmentTransitionHelperApi21 {
     35 
     36     public static void addTransitions(Fragment f) {
     37         final Transition transitionStartEdge = new FadeAndShortSlide(Gravity.START);
     38         final Transition transitionEndEdge = new FadeAndShortSlide(Gravity.END);
     39 
     40         f.setEnterTransition(transitionEndEdge);
     41         f.setExitTransition(transitionStartEdge);
     42         f.setReenterTransition(transitionStartEdge);
     43         f.setReturnTransition(transitionEndEdge);
     44     }
     45 
     46 
     47     private LeanbackPreferenceFragmentTransitionHelperApi21() {
     48     }
     49 }
     50