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ActionBarCompat-ShareActionProvider / src / com.example.android.actionbarcompat.shareactionprovider /

MainActivity.java

       
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        /*
       
       
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        * Copyright (C) 2013 The Android Open Source Project
       
       
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        *
       
       
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        * Licensed under the Apache License, Version 2.0 (the "License");
       
       
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        * you may not use this file except in compliance with the License.
       
       
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        * You may obtain a copy of the License at
       
       
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        *
       
       
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        *      http://www.apache.org/licenses/LICENSE-2.0
       
       
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        *
       
       
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        * Unless required by applicable law or agreed to in writing, software
       
       
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        * distributed under the License is distributed on an "AS IS" BASIS,
       
       
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        * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       
       
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        * See the License for the specific language governing permissions and
       
       
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        * limitations under the License.
       
       
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        */
       
       
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        package com.example.android.actionbarcompat.shareactionprovider;
       
       
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        import android.content.Intent;
       
       
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        import android.os.Bundle;
       
       
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        import android.support.v4.view.MenuItemCompat;
       
       
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        import android.support.v4.view.PagerAdapter;
       
       
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        import android.support.v4.view.ViewPager;
       
       
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        import android.support.v7.app.ActionBarActivity;
       
       
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        import android.support.v7.widget.ShareActionProvider;
       
       
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        import android.view.LayoutInflater;
       
       
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        import android.view.Menu;
       
       
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        import android.view.MenuItem;
       
       
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        import android.view.View;
       
       
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        import android.view.ViewGroup;
       
       
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        import android.widget.ImageView;
       
       
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        import android.widget.TextView;
       
       
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        import com.example.android.actionbarcompat.shareactionprovider.content.ContentItem;
       
       
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        import java.util.ArrayList;
       
       
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        /**
       
       
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        * This sample shows you how a provide a {@link ShareActionProvider} with ActionBarCompat,
       
       
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        * backwards compatible to API v7.
       
       
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        * <p>
       
       
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        * The sample contains a {@link ViewPager} which displays content of differing types: image and
       
       
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        * text. When a new item is selected in the ViewPager, the ShareActionProvider is updated with
       
       
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        * a share intent specific to that content.
       
       
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        * <p>
       
       
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        * This Activity extends from {@link ActionBarActivity}, which provides all of the function
       
       
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        * necessary to display a compatible Action Bar on devices running Android v2.1+.
       
       
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        */
       
       
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        public class MainActivity extends ActionBarActivity {
       
       
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        // The items to be displayed in the ViewPager
       
       
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        private final ArrayList<ContentItem> mItems = getSampleContent();
       
       
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        // Keep reference to the ShareActionProvider from the menu
       
       
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        private ShareActionProvider mShareActionProvider;
       
       
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        @Override
       
       
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        protected void onCreate(Bundle savedInstanceState) {
       
       
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        super.onCreate(savedInstanceState);
       
       
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        // Set content view (which contains a CheeseListFragment)
       
       
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        setContentView(R.layout.sample_main);
       
       
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        // Retrieve the ViewPager from the content view
       
       
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        ViewPager vp = (ViewPager) findViewById(R.id.viewpager);
       
       
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        // Set an OnPageChangeListener so we are notified when a new item is selected
       
       
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        vp.setOnPageChangeListener(mOnPageChangeListener);
       
       
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        // Finally set the adapter so the ViewPager can display items
       
       
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        vp.setAdapter(mPagerAdapter);
       
       
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        }
       
       
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        @Override
       
       
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        public boolean onCreateOptionsMenu(Menu menu) {
       
       
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        // Inflate the menu resource
       
       
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        getMenuInflater().inflate(R.menu.main_menu, menu);
       
       
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        // Retrieve the share menu item
       
       
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        MenuItem shareItem = menu.findItem(R.id.menu_share);
       
       
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        // Now get the ShareActionProvider from the item
       
       
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        mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(shareItem);
       
       
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        return super.onCreateOptionsMenu(menu);
       
       
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        }
       
       
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        /**
       
       
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        * A PagerAdapter which instantiates views based on the ContentItem's content type.
       
       
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        */
       
       
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        private final PagerAdapter mPagerAdapter = new PagerAdapter() {
       
       
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        LayoutInflater mInflater;
       
       
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        @Override
       
       
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        public int getCount() {
       
       
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        return mItems.size();
       
       
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        }
       
       
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        @Override
       
       
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        public boolean isViewFromObject(View view, Object o) {
       
       
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        return view == o;
       
       
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        }
       
       
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        @Override
       
       
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        public void destroyItem(ViewGroup container, int position, Object object) {
       
       
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        // Just remove the view from the ViewPager
       
       
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        container.removeView((View) object);
       
       
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        }
       
       
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        @Override
       
       
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        public Object instantiateItem(ViewGroup container, int position) {
       
       
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        // Ensure that the LayoutInflater is instantiated
       
       
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        if (mInflater == null) {
       
       
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        mInflater = LayoutInflater.from(MainActivity.this);
       
       
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        }
       
       
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        // Get the item for the requested position
       
       
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        final ContentItem item = mItems.get(position);
       
       
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        // The view we need to inflate changes based on the type of content
       
       
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        switch (item.contentType) {
       
       
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        case ContentItem.CONTENT_TYPE_TEXT: {
       
       
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        // Inflate item layout for text
       
       
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        TextView tv = (TextView) mInflater
       
       
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        .inflate(R.layout.item_text, container, false);
       
       
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        // Set text content using it's resource id
       
       
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        tv.setText(item.contentResourceId);
       
       
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        // Add the view to the ViewPager
       
       
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        container.addView(tv);
       
       
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        return tv;
       
       
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        }
       
       
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        case ContentItem.CONTENT_TYPE_IMAGE: {
       
       
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        // Inflate item layout for images
       
       
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        ImageView iv = (ImageView) mInflater
       
       
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        .inflate(R.layout.item_image, container, false);
       
       
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        // Load the image from it's content URI
       
       
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        iv.setImageURI(item.getContentUri());
       
       
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        // Add the view to the ViewPager
       
       
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        container.addView(iv);
       
       
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        return iv;
       
       
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        }
       
       
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        }
       
       
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        return null;
       
       
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        }
       
       
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        };
       
       
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        /**
       
       
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        * A OnPageChangeListener used to update the ShareActionProvider's share intent when a new item
       
       
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        * is selected in the ViewPager.
       
       
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        */
       
       
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        private final ViewPager.OnPageChangeListener mOnPageChangeListener
       
       
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        = new ViewPager.OnPageChangeListener() {
       
       
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        @Override
       
       
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        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
       
       
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        // NO-OP
       
       
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        }
       
       
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        @Override
       
       
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        public void onPageSelected(int position) {
       
       
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        if (mShareActionProvider != null) {
       
       
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        // Get the currently selected item, and retrieve it's share intent
       
       
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        ContentItem item = mItems.get(position);
       
       
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        Intent shareIntent = item.getShareIntent(MainActivity.this);
       
       
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        // Now update the ShareActionProvider with the new share intent
       
       
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        mShareActionProvider.setShareIntent(shareIntent);
       
       
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        }
       
       
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        }
       
       
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        @Override
       
       
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        public void onPageScrollStateChanged(int state) {
       
       
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        // NO-OP
       
       
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        }
       
       
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        };
       
       
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        /**
       
       
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        * @return An ArrayList of ContentItem's to be displayed in this sample
       
       
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        */
       
       
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        static ArrayList<ContentItem> getSampleContent() {
       
       
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        ArrayList<ContentItem> items = new ArrayList<ContentItem>();
       
       
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        items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_1.jpg"));
       
       
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        items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_1));
       
       
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        items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_2));
       
       
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        items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_2.jpg"));
       
       
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        items.add(new ContentItem(ContentItem.CONTENT_TYPE_TEXT, R.string.quote_3));
       
       
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        items.add(new ContentItem(ContentItem.CONTENT_TYPE_IMAGE, "photo_3.jpg"));
       
       
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        return items;
       
       
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        }
       
       
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        }