MainActivity.java

/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
 * copy, modify, and distribute this software in source code or binary form for use
 * in connection with the web services and APIs provided by Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use of
 * this software is subject to the Facebook Developer Principles and Policies
 * [http://developers.facebook.com/policy/]. This copyright notice shall be
 * included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.example.shareit;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v7.widget.ShareActionProvider;

public class MainActivity extends ActionBarActivity {
    private ShareActionProvider mShareActionProvider;
    private ShareFragment mShareFragment;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);
        FragmentManager fm = getSupportFragmentManager();
        mShareFragment = (ShareFragment) fm.findFragmentById(R.id.sharefragment);
        mShareFragment.setOnShareContentChangeListener(
                new ShareFragment.OnShareContentChangedListener() {
            @Override
            public void onShareContentChanged(String content) {
                setShareUrl(content);
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate menu resource file.
        getMenuInflater().inflate(R.menu.share_menu, menu);

        // Locate MenuItem with ShareActionProvider
        MenuItem item = menu.findItem(R.id.menu_item_share);

        // Fetch and store ShareActionProvider
        mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(item);
        setShareUrl(mShareFragment.getCurrentShareContent());

        // Return true to display menu
        return true;
    }

    private void setShareUrl(String shareUrl) {
        // When using androids share built into the ActionBar app attribution will not be
        // present when sharing to facebook and app events will not be logged.
        if (mShareActionProvider != null) {
            Intent shareIntent = new Intent(Intent.ACTION_SEND);
            shareIntent.setType("text/plain");
            shareIntent.putExtra(Intent.EXTRA_TEXT, shareUrl);
            mShareActionProvider.setShareIntent(shareIntent);
        }
    }

    @Override
    protected void onSaveInstanceState(final Bundle outState) {
        // Don't save any state
    }
}