导航的抽屉是一个面板，用于显示应用程序的主要导航，位于屏幕的左边缘。它大部分时间是隐藏的，然而，当用户用手指从屏幕的左边滑动时会显示，或者点击标题栏上的图标也会出现。在你决定你的应用程序使用一个导航的抽屉里，你应该明白在导航的抽屉的设计用例和设计原则的定义。

对于创建一个导航的抽屉---从左抽出的方式有很多中，在此使用Support Library提供的android-support-v4.jar中的DrawerLayout类实现。

看看布局文件：

<!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#739361" >

    <!--
         As the main content view, the view below consumes the entire
         space available using match_parent in both dimensions.
    -->


    <!-- FrameLayout 经常与Fragment结合使用 -->

    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!--
         android:layout_gravity="start" tells DrawerLayout to treat
         this as a sliding drawer on the left side for left-to-right
         languages and on the right side for right-to-left languages.
         The drawer is given a fixed width in dp and extends the full height of
         the container. A solid background is used for contrast
         with the content view.
    -->

    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#111"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp" />

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

ListView中的每项布局：

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?android:attr/activatedBackgroundIndicator"
    android:gravity="center_vertical"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:textAppearance="?android:attr/textAppearanceListItemSmall"
    android:textColor="#fff" />

设置ListView的适配器：

        // 设置ListView的适配器，定义其每一项中的布局，并且设置监听器DrawerItemClickListener
        mDrawerList.setAdapter(new ArrayAdapter<String>(this,
                R.layout.drawer_list_item, mPlanetTitles));
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

Fragment相对应的布局：

<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/image"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000000"
    android:gravity="center"
    android:padding="32dp" />

在ImageView中给id赋给资源的是在PlanetFragment这个类中，通过点击ListView中的项获取名称，再根据名称获取图片资源。

步骤：

1、在ListView的点击事件中，设置一个参数PlanetFragment.ARG_PLANET_NUMBER

Fragment fragment = new PlanetFragment();
        Bundle args = new Bundle();
        args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
        fragment.setArguments(args);

2、在PlanetFragment类中获取这个数

int i = getArguments().getInt(ARG_PLANET_NUMBER);

3、由于在strings.xml中设置了

    <!--
    定义一个String数组，八大行星分别是：
    水星、金星、地球、火星、木星、土星、天王星、海王星
    -->
    <string-array name="planets_array">
        <item>Mercury</item>
        <item>Venus</item>
        <item>Earth</item>
        <item>Mars</item>
        <item>Jupiter</item>
        <item>Saturn</item>
        <item>Uranus</item>
        <item>Neptune</item>
    </string-array>

4、根据获取的数获取字符串

            String planet = getResources()
                    .getStringArray(R.array.planets_array)[i];

5、根据字符串（名称）获取图片资源

            // 按照文件名获取资源id
            int imageId = getResources().getIdentifier(
                    planet.toLowerCase(Locale.getDefault()), "drawable",
                    getActivity().getPackageName());

            ((ImageView) rootView.findViewById(R.id.image))
                    .setImageResource(imageId);

为mDrawerLayout设置监听，DrawerLayout.DrawerListener如下：

mDrawerLayout.setDrawerListener(new DrawerListener() {
            
            @Override
            public void onDrawerStateChanged(int arg0) {
                // TODO Auto-generated method stub
                
            }
            
            @Override
            public void onDrawerSlide(View arg0, float arg1) {
                // TODO Auto-generated method stub
                
            }
            
            @Override
            public void onDrawerOpened(View arg0) {
                // TODO Auto-generated method stub
                
            }
            
            @Override
            public void onDrawerClosed(View arg0) {
                // TODO Auto-generated method stub
                
            }
        });

还有当存在ActionBar时，可以使用ActionBarDrawerToggle，如public class ActionBarDrawerToggle implements DrawerLayout.DrawerListener说明：ActionBarDrawerToggle 实现 DrawerLayout.DrawerListener，只需要实现其中主要的方法就可以，更加简便。

        mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
        mDrawerLayout, /* DrawerLayout object */
        R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
        R.string.drawer_open, /* "open drawer" description for accessibility */
        R.string.drawer_close /* "close drawer" description for accessibility */
        )
 {
            public void onDrawerClosed(View view) {
                getActionBar().setTitle(mTitle);
                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }

            public void onDrawerOpened(View drawerView) {
                getActionBar().setTitle(mDrawerTitle);
                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }
        };

   // Set the drawer toggle as the DrawerListener
   mDrawerLayout.setDrawerListener(mDrawerToggle);

   getActionBar().setDisplayHomeAsUpEnabled(true);
   getActionBar().setHomeButtonEnabled(true);
 

mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
                R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) {

            /** Called when a drawer has settled in a completely closed state. */
            public void onDrawerClosed(View view) {
                getActionBar().setTitle(mTitle);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }

            /** Called when a drawer has settled in a completely open state. */
            public void onDrawerOpened(View drawerView) {
                getActionBar().setTitle(mDrawerTitle);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
        };

完整Java代码：
package com.example.android.navigationdrawerexample;

import java.util.Locale;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.SearchManager;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v4.widget.DrawerLayout.DrawerListener;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
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 MainActivity extends Activity {

    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;

    private ActionBarDrawerToggle mDrawerToggle;

    private CharSequence mDrawerTitle;
    private CharSequence mTitle;
    private String[] mPlanetTitles;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTitle = mDrawerTitle = getTitle();
        // 从资源中获取定义的String数组
        mPlanetTitles = getResources().getStringArray(R.array.planets_array);

        // 找到各个控件
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.left_drawer);

        // set a custom shadow that overlays the main content when the drawer
        // opens
        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
                GravityCompat.START);

        // 设置ListView的适配器，定义其每一项中的布局，并且设置监听器DrawerItemClickListener
        mDrawerList.setAdapter(new ArrayAdapter<String>(this,
                R.layout.drawer_list_item, mPlanetTitles));
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

        // enable ActionBar app icon to behave as action to toggle nav drawer
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setHomeButtonEnabled(true);

        // ActionBarDrawerToggle ties together the the proper interactions
        // between the sliding drawer and the action bar app icon
        mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
        mDrawerLayout, /* DrawerLayout object */
        R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
        R.string.drawer_open, /* "open drawer" description for accessibility */
        R.string.drawer_close /* "close drawer" description for accessibility */
        )
 {
            public void onDrawerClosed(View view) {
                getActionBar().setTitle(mTitle);
                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }

            public void onDrawerOpened(View drawerView) {
                getActionBar().setTitle(mDrawerTitle);
                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }
        };
        mDrawerLayout.setDrawerListener(mDrawerToggle);

        if (savedInstanceState == null) {
            selectItem(0);
        }
    }

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

    /**
     * 响应事件
     */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // The action bar home/up action should open or close the drawer.
        // ActionBarDrawerToggle will take care of this.
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action buttons
        switch (item.getItemId()) {
        case R.id.action_websearch:
            // create intent to perform web search for this planet
            Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
            intent.putExtra(SearchManager.QUERY, getActionBar().getTitle());
            // catch event that there's no activity to handle intent
            if (intent.resolveActivity(getPackageManager()) != null) {
                startActivity(intent);
            } else {
                Toast.makeText(this, R.string.app_not_available,
                        Toast.LENGTH_LONG).show();
            }
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    /** 当调用方法invalidateOptionsMenu()时，调用此方法 */
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        // If the nav drawer is open, hide action items related to the content
        // view
        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
        menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
        return super.onPrepareOptionsMenu(menu);
    }

    /* The click listner for ListView in the navigation drawer */
    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) {
        // update the main content by replacing fragments
        Fragment fragment = new PlanetFragment();
        Bundle args = new Bundle();
        args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
        fragment.setArguments(args);

        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.content_frame, fragment).commit();

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

    @Override
    public void setTitle(CharSequence title) {
        mTitle = title;
        getActionBar().setTitle(mTitle);
    }

    /**
     * When using the ActionBarDrawerToggle, you must call it during
     * onPostCreate() and onConfigurationChanged()...
     */

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        // Sync the toggle state after onRestoreInstanceState has occurred.
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggls
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

    /**
     * Fragment that appears in the "content_frame", shows a planet
     */
    public static class PlanetFragment extends Fragment {
        public static final String ARG_PLANET_NUMBER = "planet_number";

        public PlanetFragment() {
            // Empty constructor required for fragment subclasses
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_planet,
                    container, false);
            
            int i = getArguments().getInt(ARG_PLANET_NUMBER);

            String planet = getResources()
                    .getStringArray(R.array.planets_array)[i];

            // 按照文件名获取资源id
            int imageId = getResources().getIdentifier(
                    planet.toLowerCase(Locale.getDefault()), "drawable",
                    getActivity().getPackageName());

            ((ImageView) rootView.findViewById(R.id.image))
                    .setImageResource(imageId);

            getActivity().setTitle(planet);
            return rootView;
        }
    }
}