1 /*
2  * Copyright (C) 2014 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 com.example.android.customtransition;
18 
19 import com.example.android.common.logger.Log;
20 
21 import android.content.Context;
22 import android.os.Bundle;
23 import android.support.v4.app.Fragment;
24 import android.transition.Scene;
25 import android.transition.Transition;
26 import android.transition.TransitionManager;
27 import android.view.LayoutInflater;
28 import android.view.View;
29 import android.view.ViewGroup;
30 import android.widget.FrameLayout;
31 
32 public class CustomTransitionFragment extends Fragment implements View.OnClickListener {
33 
34     private static final String STATE_CURRENT_SCENE = "current_scene";
35 
36     /** Tag for the logger */
37     private static final String TAG = "CustomTransitionFragment";
38 
39     /** These are the Scenes we use. */
40     private Scene[] mScenes;
41 
42     /** The current index for mScenes. */
43     private int mCurrentScene;
44 
45     /** This is the custom Transition we use in this sample. */
46     private Transition mTransition;
47 
CustomTransitionFragment()48     public CustomTransitionFragment() {
49     }
50 
51     @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)52     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
53         return inflater.inflate(R.layout.fragment_custom_transition, container, false);
54     }
55 
56     @Override
onViewCreated(View view, Bundle savedInstanceState)57     public void onViewCreated(View view, Bundle savedInstanceState) {
58         Context context = getActivity();
59         FrameLayout container = (FrameLayout) view.findViewById(R.id.container);
60         view.findViewById(R.id.show_next_scene).setOnClickListener(this);
61         if (null != savedInstanceState) {
62             mCurrentScene = savedInstanceState.getInt(STATE_CURRENT_SCENE);
63         }
64         // We set up the Scenes here.
65         mScenes = new Scene[] {
66                 Scene.getSceneForLayout(container, R.layout.scene1, context),
67                 Scene.getSceneForLayout(container, R.layout.scene2, context),
68                 Scene.getSceneForLayout(container, R.layout.scene3, context),
69         };
70         // This is the custom Transition.
71         mTransition = new ChangeColor();
72         // Show the initial Scene.
73         TransitionManager.go(mScenes[mCurrentScene % mScenes.length]);
74     }
75 
76     @Override
onSaveInstanceState(Bundle outState)77     public void onSaveInstanceState(Bundle outState) {
78         super.onSaveInstanceState(outState);
79         outState.putInt(STATE_CURRENT_SCENE, mCurrentScene);
80     }
81 
82     @Override
onClick(View v)83     public void onClick(View v) {
84         switch (v.getId()) {
85             case R.id.show_next_scene: {
86                 mCurrentScene = (mCurrentScene + 1) % mScenes.length;
87                 Log.i(TAG, "Transitioning to scene #" + mCurrentScene);
88                 // Pass the custom Transition as second argument for TransitionManager.go
89                 TransitionManager.go(mScenes[mCurrentScene], mTransition);
90                 break;
91             }
92         }
93     }
94 
95 }
96