DrawLayout几个注意点

package com.example.navigationdrawer5;

import java.util.Locale;

import android.app.Activity;
import android.app.Fragment;
import android.app.SearchManager;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;

public class DrawerActivity extends Activity {
	private DrawerLayout drawerLayout;
	private ActionBarDrawerToggle drawerToggle;
	private ListView drawerList;
	private String[] planetTitles;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_drawer);
		planetTitles = getResources().getStringArray(R.array.planets_array);
		drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
		drawerList = (ListView) findViewById(R.id.drawerList);
		drawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, planetTitles));
		drawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				selectItem(position);
			}
		});
		getActionBar().setDisplayHomeAsUpEnabled(true);
		getActionBar().setHomeButtonEnabled(true);
		drawerToggle = new ActionBarDrawerToggle(
				this, 
				drawerLayout, 
				R.drawable.ic_drawer, 
				R.string.drawer_open, 
				R.string.drawer_close) {
			@Override
			public void onDrawerClosed(View drawerView) {
				int position = drawerList.getCheckedItemPosition();
				getActionBar().setTitle(planetTitles[position]);
				invalidateOptionsMenu();
				super.onDrawerClosed(drawerView);
			}
			
			@Override
			public void onDrawerOpened(View drawerView) {
				getActionBar().setTitle(R.string.app_name);
				invalidateOptionsMenu();
				super.onDrawerOpened(drawerView);
			}
		};
		drawerLayout.setDrawerListener(drawerToggle);
		if (savedInstanceState == null) {
			selectItem(0);
		}
	}

	private void selectItem(int position) {
		Fragment fragment = new DrawerFragment();
		Bundle args = new Bundle();
		args.putInt(DrawerFragment.ARG_PLANET_ID, position);
		fragment.setArguments(args);
		getFragmentManager().beginTransaction().replace(R.id.contentFrame, fragment).commit();
		drawerList.setItemChecked(position, true);
		drawerLayout.closeDrawer(drawerList);
		getActionBar().setTitle(planetTitles[position]);
	}
	
	@Override
	protected void onPostCreate(Bundle savedInstanceState) {
		super.onPostCreate(savedInstanceState);
		//5、必须在此处同步状态
		drawerToggle.syncState();
	}
	
	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		super.onConfigurationChanged(newConfig);
		drawerToggle.onConfigurationChanged(newConfig);
	}

	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {
		boolean isDrawerOpen = drawerLayout.isDrawerOpen(drawerList);
		menu.findItem(R.id.action_search).setVisible(!isDrawerOpen);
		return super.onPrepareOptionsMenu(menu);
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.drawer, menu);
		return true;
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		//6.需要在此处调用触发器处理下action bar上的item选择事件
		if (drawerToggle.onOptionsItemSelected(item)) {
			return true;
		}
		switch (item.getItemId()) {
		case R.id.action_search:
			Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
			intent.putExtra(SearchManager.QUERY, getActionBar().getTitle());
			if (intent.resolveActivity(getPackageManager()) != null) {
				startActivity(intent);
			} else {
				Toast.makeText(this, "没找到浏览器", Toast.LENGTH_LONG).show();
			}
			break;
		}
		return super.onOptionsItemSelected(item);
	}
	
	public static class DrawerFragment extends Fragment {
		private static final String ARG_PLANET_ID = "planet_id";
		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
				Bundle savedInstanceState) {
			ImageView view = (ImageView) inflater.inflate(R.layout.drawer_content, container, false);
			Resources res = getActivity().getResources();
			int planetId = getArguments().getInt(ARG_PLANET_ID);
			int imageid = res.getIdentifier(res.getStringArray(R.array.planets_array)[planetId].toLowerCase(Locale.getDefault()), "drawable", getActivity().getPackageName());
			view.setImageResource(imageid);
			return view;
		}
	}

}

<!-- 1、使用android.support.v4.widget.DrawerLayout布局 -->
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawerLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:id="@+id/contentFrame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
    
    <!-- 2、左侧滑出的list，宽度需要固定下，不要满屏 -->
    <!-- 3、 android:layout_gravity="start"-->
    <!-- 4、 android:choiceMode="singleChoice"-->
    <ListView 
        android:id="@+id/drawerList"
        android:layout_width="180dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#111"
        android:choiceMode="singleChoice"/>

</android.support.v4.widget.DrawerLayout>