Android中通过ActionBar为标题栏添加搜索及分享视窗

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto">
  <item
    android:id="@+id/search"
    app:actionViewClass="android.support.v7.widget.SearchView"
    android:icon="@android:drawable/ic_menu_search"
    android:orderInCategory="100"
    android:title="搜索"
    app:showAsAction="always|collapseActionView" />
  <item
    android:id="@+id/share"
    android:icon="@android:drawable/ic_menu_share"
    android:orderInCategory="200"
    android:title="共享"
    app:actionProviderClass="android.support.v7.widget.ShareActionProvider"
    app:showAsAction="ifRoom" />
</menu>

import android.content.Intent;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.ShareActionProvider;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
/**
 * Created by panchengjia on 2016/12/23.
 */
public class MainActivity extends AppCompatActivity {
  SearchView searchView;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    //使用菜单填充器获取menu下的菜单资源文件
    getMenuInflater().inflate(R.menu.search_share_menu,menu);
    //获取搜索的菜单组件
    MenuItem menuItem = menu.findItem(R.id.search);
    searchView = (SearchView) MenuItemCompat.getActionView(menuItem);
    //设置搜索的事件
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
      @Override
      public boolean onQueryTextSubmit(String query) {
       Toast t = Toast.makeText(MainActivity.this, query, Toast.LENGTH_SHORT);
        t.setGravity(Gravity.TOP,0,0);
        t.show();
        return false;
      }
      @Override
      public boolean onQueryTextChange(String newText) {
        return false;
      }
    });
    //获取分享的菜单子组件
    MenuItem shareItem = menu.findItem(R.id.share);
    ShareActionProvider shareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(shareItem);
    //通过setShareIntent调用getDefaultIntent()获取所有具有分享功能的App
    shareActionProvider.setShareIntent(getDefaultIntent());
    return super.onCreateOptionsMenu(menu);
  }
  //设置可以调用手机内所有可以分享图片的应用
  private Intent getDefaultIntent() {
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_SEND);
    //这里的类型可以按需求设置
    intent.setType("image/*");
    return intent;
  }
}