1 /* 2 * Copyright (C) 2016 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.support.transition.widget; 18 19 import android.os.Bundle; 20 import android.view.Menu; 21 import android.view.MenuItem; 22 import android.view.ViewGroup; 23 import android.widget.FrameLayout; 24 25 import androidx.transition.Scene; 26 import androidx.transition.TransitionManager; 27 28 import com.example.android.support.transition.R; 29 30 abstract class SceneUsageBase extends TransitionUsageBase { 31 32 private Scene[] mScenes; 33 34 private int mCurrentScene; 35 36 abstract Scene[] setUpScenes(ViewGroup root); 37 38 abstract void go(Scene scene); 39 40 @Override 41 protected void onCreate(Bundle savedInstanceState) { 42 super.onCreate(savedInstanceState); 43 44 FrameLayout root = findViewById(R.id.root); 45 mScenes = setUpScenes(root); 46 TransitionManager.go(mScenes[0]); 47 } 48 49 @Override 50 int getLayoutResId() { 51 return R.layout.scene_usage; 52 } 53 54 @Override 55 public boolean onCreateOptionsMenu(Menu menu) { 56 getMenuInflater().inflate(R.menu.basic_usage, menu); 57 return true; 58 } 59 60 @Override 61 public boolean onOptionsItemSelected(MenuItem item) { 62 switch (item.getItemId()) { 63 case R.id.action_toggle: 64 mCurrentScene = (mCurrentScene + 1) % mScenes.length; 65 go(mScenes[mCurrentScene]); 66 return true; 67 } 68 return false; 69 } 70 71 } 72
