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