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.shareactionprovider; 18 19 import com.example.android.shareactionprovider.content.ContentItem; 20 21 import android.content.Intent; 22 import android.os.Bundle; 23 import android.support.v4.view.MenuItemCompat; 24 import android.support.v4.view.PagerAdapter; 25 import android.support.v4.view.ViewPager; 26 import android.support.v7.app.AppCompatActivity; 27 import android.support.v7.widget.ShareActionProvider; 28 import android.view.LayoutInflater; 29 import android.view.Menu; 30 import android.view.MenuItem; 31 import android.view.View; 32 import android.view.ViewGroup; 33 import android.widget.ImageView; 34 import android.widget.TextView; 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 */ 47 public class MainActivity extends AppCompatActivity { 48 49 // The items to be displayed in the ViewPager 50 private final ArrayList<ContentItem> mItems = getSampleContent(); 51 52 // Keep reference to the ShareActionProvider from the menu 53 private ShareActionProvider mShareActionProvider; 54 55 @Override onCreate(Bundle savedInstanceState)56 protected void onCreate(Bundle savedInstanceState) { 57 super.onCreate(savedInstanceState); 58 59 // Set content view (which contains a CheeseListFragment) 60 setContentView(R.layout.sample_main); 61 62 // Retrieve the ViewPager from the content view 63 ViewPager vp = (ViewPager) findViewById(R.id.viewpager); 64 65 // Set an OnPageChangeListener so we are notified when a new item is selected 66 vp.addOnPageChangeListener(mOnPageChangeListener); 67 68 // Finally set the adapter so the ViewPager can display items 69 vp.setAdapter(mPagerAdapter); 70 } 71 72 // BEGIN_INCLUDE(get_sap) 73 @Override onCreateOptionsMenu(Menu menu)74 public boolean onCreateOptionsMenu(Menu menu) { 75 // Inflate the menu resource 76 getMenuInflater().inflate(R.menu.main_menu, menu); 77 78 // Retrieve the share menu item 79 MenuItem shareItem = menu.findItem(R.id.menu_share); 80 81 // Now get the ShareActionProvider from the item 82 mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(shareItem); 83 84 // Get the ViewPager's current item position and set its ShareIntent. 85 int currentViewPagerItem = ((ViewPager) findViewById(R.id.viewpager)).getCurrentItem(); 86 setShareIntent(currentViewPagerItem); 87 88 return super.onCreateOptionsMenu(menu); 89 } 90 // END_INCLUDE(get_sap) 91 92 /** 93 * A PagerAdapter which instantiates views based on the ContentItem's content type. 94 */ 95 private final PagerAdapter mPagerAdapter = new PagerAdapter() { 96 LayoutInflater mInflater; 97 98 @Override 99 public int getCount() { 100 return mItems.size(); 101 } 102 103 @Override 104 public boolean isViewFromObject(View view, Object o) { 105 return view == o; 106 } 107 108 @Override 109 public void destroyItem(ViewGroup container, int position, Object object) { 110 // Just remove the view from the ViewPager 111 container.removeView((View) object); 112 } 113 114 @Override 115 public Object instantiateItem(ViewGroup container, int position) { 116 // Ensure that the LayoutInflater is instantiated 117 if (mInflater == null) { 118 mInflater = LayoutInflater.from(MainActivity.this); 119 } 120 121 // Get the item for the requested position 122 final ContentItem item = mItems.get(position); 123 124 // The view we need to inflate changes based on the type of content 125 switch (item.contentType) { 126 case ContentItem.CONTENT_TYPE_TEXT: { 127 // Inflate item layout for text 128 TextView tv = (TextView) mInflater 129 .inflate(R.layout.item_text, container, false); 130 131 // Set text content using it's resource id 132 tv.setText(item.contentResourceId); 133 134 // Add the view to the ViewPager 135 container.addView(tv); 136 return tv; 137 } 138 case ContentItem.CONTENT_TYPE_IMAGE: { 139 // Inflate item layout for images 140 ImageView iv = (ImageView) mInflater 141 .inflate(R.layout.item_image, container, false); 142 143 // Load the image from it's content URI 144 iv.setImageURI(item.getContentUri()); 145 146 // Add the view to the ViewPager 147 container.addView(iv); 148 return iv; 149 } 150 } 151 152 return null; 153 } 154 }; 155 setShareIntent(int position)156 private void setShareIntent(int position) { 157 // BEGIN_INCLUDE(update_sap) 158 if (mShareActionProvider != null) { 159 // Get the currently selected item, and retrieve it's share intent 160 ContentItem item = mItems.get(position); 161 Intent shareIntent = item.getShareIntent(MainActivity.this); 162 163 // Now update the ShareActionProvider with the new share intent 164 mShareActionProvider.setShareIntent(shareIntent); 165 } 166 // END_INCLUDE(update_sap) 167 } 168 169 /** 170 * A OnPageChangeListener used to update the ShareActionProvider's share intent when a new item 171 * is selected in the ViewPager. 172 */ 173 private final ViewPager.OnPageChangeListener mOnPageChangeListener 174 = new ViewPager.OnPageChangeListener() { 175 176 @Override 177 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 178 // NO-OP 179 } 180 181 @Override 182 public void onPageSelected(int position) { 183 setShareIntent(position); 184 } 185 186 @Override 187 public void onPageScrollStateChanged(int state) { 188 // NO-OP 189 } 190 }; 191 192 /** 193 * @return An ArrayList of ContentItem's to be displayed in this sample 194 */ getSampleContent()195 static ArrayList<ContentItem> getSampleContent() { 196 ArrayList<ContentItem> items = new ArrayList<ContentItem>(); 197 198 items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_1.jpg")); 199 items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_1)); 200 items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_2)); 201 items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_2.jpg")); 202 items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_3)); 203 items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_3.jpg")); 204 205 return items; 206 } 207 208 }