Android－－DrawLayout导航抽屉

    DrawLayout的实现官方文档上说的很详细了，但是在开发的过程中，发现还是有点问题，官方的文档有点旧了，mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout,R.string.open,R.string.close);  这个方法原来的api可以设置app的icon图片，现在这个参数没有了。
  对于ActionBarDrawerToggle 这个类，作用时使得actionbar和drawlayout之间可以很好的相互组合。通过用ActionBarDrawerToggle可以实现app icon点击来打开抽屉的功能呢。
  主要需要实现：
   getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);
   

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // The action bar home/up action should open or close the drawer.
        // ActionBarDrawerToggle will take care of this.
        Log.v("haha",""+item.getItemId());
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action buttons
        switch(item.getItemId()) {
            case R.id.action_settings:

                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    已经在主activity中重载这个方法来是的对于actionbar的item的操作可以传给ActionBarDrawerToggle来处理，其实就我现在知道的就是处理actionbar的appicon的点击动作。
  

@Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }

    这个方法的重载调用的syncState就是为了保持actionBar和ActionBarDrawerToggle的状态一致，这个函数是Activity的生命周期里的一个方法，只会调用一次。
  
  主要的代码：
  

package com.example.dolby.drawernavi;

import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.res.Configuration;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.app.ActionBarDrawerToggle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;


public class MainActivity extends ActionBarActivity {
    private String[] mPlanetTitles = {"list1","list2","list3"};
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private Button drawbtn;
    private ActionBarDrawerToggle mDrawerToggle;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //mPlanetTitles = getResources().getStringArray(R.array.planets_array);
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.left_drawer);
        mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout,R.string.open,R.string.close);
        // Set the drawer toggle as the DrawerListener
        mDrawerLayout.setDrawerListener(mDrawerToggle);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);

        // enable ActionBar app icon to behave as action to toggle nav drawer
        //getActionBar().setDisplayHomeAsUpEnabled(true);
        // Set the adapter for the list view
        mDrawerList.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1
                , mPlanetTitles));
        // Set the list's click listener
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
    }

    private class DrawerItemClickListener implements ListView.OnItemClickListener
    {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            selectItem(position);
        }
    }

    private void selectItem(int position)
    {
        Fragment fragment = new PlanetFragment();

        // Insert the fragment by replacing any existing fragment
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.content_frame, fragment)
                .commit();

        // Highlight the selected item, update the title, and close the drawer
        mDrawerList.setItemChecked(position, true);
        setTitle(mPlanetTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
    }


    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }

//    @Override
//    public void onConfigurationChanged(Configuration newConfig) {
//        super.onConfigurationChanged(newConfig);
//        mDrawerToggle.onConfigurationChanged(newConfig);
//    }

//    @Override
//    public boolean onCreateOptionsMenu(Menu menu) {
//        MenuInflater inflater = getMenuInflater();
//        inflater.inflate(R.menu.menu_main,menu);
//        return super.onCreateOptionsMenu(menu);
//    }

//    @Override
//    public boolean onPrepareOptionsMenu(Menu menu) {
////        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
////        menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
////        return super.onPrepareOptionsMenu(menu);
//        return true;
//    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // The action bar home/up action should open or close the drawer.
        // ActionBarDrawerToggle will take care of this.
        Log.v("haha",""+item.getItemId());
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action buttons
        switch(item.getItemId()) {
            case R.id.action_settings:

                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }


}

<android.support.v4.widget.DrawerLayout
    xmlns:android=""
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- The main content view -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <!--<Button-->
            <!--android:id="@+id/btn"-->
            <!--android:layout_width="match_parent"-->
            <!--android:layout_height="wrap_content"-->
            <!--android:text="open"-->
            <!--/>-->
    </FrameLayout>

    <!-- The navigation drawer -->
    <ListView android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#FFFFFF"/>
</android.support.v4.widget.DrawerLayout>