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      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.wearable.flashlight;
     18 
     19 import android.app.Activity;
     20 import android.app.Fragment;
     21 import android.app.FragmentManager;
     22 import android.os.Bundle;
     23 import android.support.v13.app.FragmentPagerAdapter;
     24 import android.support.v4.view.ViewPager;
     25 import android.support.v4.view.ViewPager.OnPageChangeListener;
     26 import android.view.LayoutInflater;
     27 import android.view.View;
     28 import android.view.ViewGroup;
     29 
     30 import java.util.ArrayList;
     31 
     32 /**
     33  * Let there be light.
     34  */
     35 public class MainActivity extends Activity {
     36 
     37     private ViewPager mViewPager;
     38 
     39     @Override
     40     protected void onCreate(Bundle savedInstanceState) {
     41         super.onCreate(savedInstanceState);
     42 
     43         setContentView(R.layout.main);
     44         mViewPager = (ViewPager) findViewById(R.id.pager);
     45         final LightFragmentAdapter adapter = new LightFragmentAdapter(getFragmentManager());
     46         adapter.addFragment(new WhiteLightFragment());
     47         final PartyLightFragment partyFragment = new PartyLightFragment();
     48         adapter.addFragment(partyFragment);
     49         mViewPager.setAdapter(adapter);
     50         mViewPager.setOnPageChangeListener(new OnPageChangeListener() {
     51 
     52             @Override
     53             public void onPageSelected(int position) {
     54                 if (position == 1) {
     55                     partyFragment.startCycling();
     56                 } else {
     57                     partyFragment.stopCycling();
     58                 }
     59             }
     60 
     61             @Override
     62             public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
     63             }
     64 
     65             @Override
     66             public void onPageScrollStateChanged(int state) {
     67             }
     68         });
     69     }
     70 
     71     static class LightFragmentAdapter extends FragmentPagerAdapter {
     72         private ArrayList<Fragment> mFragments;
     73 
     74         public LightFragmentAdapter(FragmentManager fm) {
     75             super(fm);
     76             mFragments = new ArrayList<Fragment>();
     77         }
     78 
     79         @Override
     80         public Fragment getItem(int position) {
     81             return mFragments.get(position);
     82         }
     83 
     84         @Override
     85         public int getCount() {
     86             return mFragments.size();
     87         }
     88 
     89         public void addFragment(Fragment fragment) {
     90             mFragments.add(fragment);
     91             // Update the pager when adding a fragment.
     92             notifyDataSetChanged();
     93         }
     94     }
     95 
     96     public static class WhiteLightFragment extends Fragment {
     97 
     98         @Override
     99         public View onCreateView(LayoutInflater inflater, ViewGroup container,
    100                 Bundle savedInstanceState) {
    101             return inflater.inflate(R.layout.white_light, container, false);
    102         }
    103     }
    104 
    105     public static class PartyLightFragment extends Fragment {
    106 
    107         private PartyLightView mView;
    108 
    109         @Override
    110         public View onCreateView(LayoutInflater inflater, ViewGroup container,
    111                 Bundle savedInstanceState) {
    112             mView = (PartyLightView) inflater.inflate(R.layout.party_light, container, false);
    113             return mView;
    114         }
    115 
    116         public void startCycling() {
    117             mView.startCycling();
    118         }
    119 
    120         public void stopCycling() {
    121             mView.stopCycling();
    122         }
    123 
    124     }
    125 }
    126