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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.basictransition;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.transition.Scene;
import android.transition.TransitionInflater;
import android.transition.TransitionManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioGroup;
public class BasicTransitionFragment extends Fragment
implements RadioGroup.OnCheckedChangeListener {
// We transition between these Scenes
private Scene mScene1;
private Scene mScene2;
private Scene mScene3;
/** A custom TransitionManager */
private TransitionManager mTransitionManagerForScene3;
/** Transitions take place in this ViewGroup. We retain this for the dynamic transition on scene 4. */
private ViewGroup mSceneRoot;
public static BasicTransitionFragment newInstance() {
return new BasicTransitionFragment();
}
public BasicTransitionFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_basic_transition, container, false);
assert view != null;
RadioGroup radioGroup = (RadioGroup) view.findViewById(R.id.select_scene);
radioGroup.setOnCheckedChangeListener(this);
mSceneRoot = (ViewGroup) view.findViewById(R.id.scene_root);
// A Scene can be instantiated from a live view hierarchy.
mScene1 = new Scene(mSceneRoot, (ViewGroup) mSceneRoot.findViewById(R.id.container));
// You can also inflate a generate a Scene from a layout resource file.
mScene2 = Scene.getSceneForLayout(mSceneRoot, R.layout.scene2, getActivity());
// Another scene from a layout resource file.
mScene3 = Scene.getSceneForLayout(mSceneRoot, R.layout.scene3, getActivity());
// We create a custom TransitionManager for Scene 3, in which ChangeBounds and Fade
// take place at the same time.
mTransitionManagerForScene3 = TransitionInflater.from(getActivity())
.inflateTransitionManager(R.transition.scene3_transition_manager, mSceneRoot);
return view;
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.select_scene_1: {
// You can start an automatic transition with TransitionManager.go().
TransitionManager.go(mScene1);
break;
}
case R.id.select_scene_2: {
TransitionManager.go(mScene2);
break;
}
case R.id.select_scene_3: {
// You can also start a transition with a custom TransitionManager.
mTransitionManagerForScene3.transitionTo(mScene3);
break;
}
case R.id.select_scene_4: {
// Alternatively, transition can be invoked dynamically without a Scene.
// For this, we first call TransitionManager.beginDelayedTransition().
TransitionManager.beginDelayedTransition(mSceneRoot);
// Then, we can just change view properties as usual.
View square = mSceneRoot.findViewById(R.id.transition_square);
ViewGroup.LayoutParams params = square.getLayoutParams();
int newSize = getResources().getDimensionPixelSize(R.dimen.square_size_expanded);
params.width = newSize;
params.height = newSize;
square.setLayoutParams(params);
break;
}
}
}
}