1 /* 2 * Copyright (C) 2013 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.actionbarcompat.shareactionprovider; 18 19 import android.content.Intent; 20 import android.os.Bundle; 21 import android.support.v4.view.MenuItemCompat; 22 import android.support.v4.view.PagerAdapter; 23 import android.support.v4.view.ViewPager; 24 import android.support.v7.app.ActionBarActivity; 25 import android.support.v7.widget.ShareActionProvider; 26 import android.view.LayoutInflater; 27 import android.view.Menu; 28 import android.view.MenuItem; 29 import android.view.View; 30 import android.view.ViewGroup; 31 import android.widget.ImageView; 32 import android.widget.TextView; 33 34 import com.example.android.actionbarcompat.shareactionprovider.content.ContentItem; 35 36 import java.util.ArrayList; 37 38 /** 39 * This sample shows you how a provide a {@link ShareActionProvider} with ActionBarCompat, 40 * backwards compatible to API v7. 41 * <p> 42 * The sample contains a {@link ViewPager} which displays content of differing types: image and 43 * text. When a new item is selected in the ViewPager, the ShareActionProvider is updated with 44 * a share intent specific to that content. 45 * <p> 46 * This Activity extends from {@link ActionBarActivity}, which provides all of the function 47 * necessary to display a compatible Action Bar on devices running Android v2.1+. 48 */ 49 public class MainActivity extends ActionBarActivity { 50 51 // The items to be displayed in the ViewPager 52 private final ArrayList<ContentItem> mItems = getSampleContent(); 53 54 // Keep reference to the ShareActionProvider from the menu 55 private ShareActionProvider mShareActionProvider; 56 57 @Override 58 protected void onCreate(Bundle savedInstanceState) { 59 super.onCreate(savedInstanceState); 60 61 // Set content view (which contains a CheeseListFragment) 62 setContentView(R.layout.sample_main); 63 64 // Retrieve the ViewPager from the content view 65 ViewPager vp = (ViewPager) findViewById(R.id.viewpager); 66 67 // Set an OnPageChangeListener so we are notified when a new item is selected 68 vp.setOnPageChangeListener(mOnPageChangeListener); 69 70 // Finally set the adapter so the ViewPager can display items 71 vp.setAdapter(mPagerAdapter); 72 } 73 75 @Override 76 public boolean onCreateOptionsMenu(Menu menu) { 77 // Inflate the menu resource 78 getMenuInflater().inflate(R.menu.main_menu, menu); 79 80 // Retrieve the share menu item 81 MenuItem shareItem = menu.findItem(R.id.menu_share); 82 83 // Now get the ShareActionProvider from the item 84 mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(shareItem); 85 86 return super.onCreateOptionsMenu(menu); 87 } 89 90 /** 91 * A PagerAdapter which instantiates views based on the ContentItem's content type. 92 */ 93 private final PagerAdapter mPagerAdapter = new PagerAdapter() { 94 LayoutInflater mInflater; 95 96 @Override 97 public int getCount() { 98 return mItems.size(); 99 } 100 101 @Override 102 public boolean isViewFromObject(View view, Object o) { 103 return view == o; 104 } 105 106 @Override 107 public void destroyItem(ViewGroup container, int position, Object object) { 108 // Just remove the view from the ViewPager 109 container.removeView((View) object); 110 } 111 112 @Override 113 public Object instantiateItem(ViewGroup container, int position) { 114 // Ensure that the LayoutInflater is instantiated 115 if (mInflater == null) { 116 mInflater = LayoutInflater.from(MainActivity.this); 117 } 118 119 // Get the item for the requested position 120 final ContentItem item = mItems.get(position); 121 122 // The view we need to inflate changes based on the type of content 123 switch (item.contentType) { 124 case ContentItem.CONTENT_TYPE_TEXT: { 125 // Inflate item layout for text 126 TextView tv = (TextView) mInflater 127 .inflate(R.layout.item_text, container, false); 128 129 // Set text content using it's resource id 130 tv.setText(item.contentResourceId); 131 132 // Add the view to the ViewPager 133 container.addView(tv); 134 return tv; 135 } 136 case ContentItem.CONTENT_TYPE_IMAGE: { 137 // Inflate item layout for images 138 ImageView iv = (ImageView) mInflater 139 .inflate(R.layout.item_image, container, false); 140 141 // Load the image from it's content URI 142 iv.setImageURI(item.getContentUri()); 143 144 // Add the view to the ViewPager 145 container.addView(iv); 146 return iv; 147 } 148 } 149 150 return null; 151 } 152 }; 153 154 /** 155 * A OnPageChangeListener used to update the ShareActionProvider's share intent when a new item 156 * is selected in the ViewPager. 157 */ 158 private final ViewPager.OnPageChangeListener mOnPageChangeListener 159 = new ViewPager.OnPageChangeListener() { 160 161 @Override 162 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 163 // NO-OP 164 } 165 166 @Override 167 public void onPageSelected(int position) { 169 if (mShareActionProvider != null) { 170 // Get the currently selected item, and retrieve it's share intent 171 ContentItem item = mItems.get(position); 172 Intent shareIntent = item.getShareIntent(MainActivity.this); 173 174 // Now update the ShareActionProvider with the new share intent 175 mShareActionProvider.setShareIntent(shareIntent); 176 } 178 } 179 180 @Override 181 public void onPageScrollStateChanged(int state) { 182 // NO-OP 183 } 184 }; 185 186 /** 187 * @return An ArrayList of ContentItem's to be displayed in this sample 188 */ 189 static ArrayList<ContentItem> getSampleContent() { 190 ArrayList<ContentItem> items = new ArrayList<ContentItem>(); 191 192 items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_1.jpg")); 193 items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_1)); 194 items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_2)); 195 items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_2.jpg")); 196 items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_3)); 197 items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_3.jpg")); 198 199 return items; 200 } 201 202 }