Android组件创建DrawerLayout导航

public class MainActivity extends Activity { 
  private String[] mPlanetTitles; 
  private DrawerLayout mDrawerLayout; 
  private ListView mDrawerList; 
  ... 
 
  @Override 
  public 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); 
 
    // Set the adapter for the list view 
    mDrawerList.setAdapter(new ArrayAdapter(this, 
        R.layout.drawer_list_item, 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); 
  } 
} 
 
/** Swaps fragments in the main content view */ 
private void selectItem(int position) { 
  // Create a new fragment and specify the planet to show based on position 
  Fragment fragment = new PlanetFragment(); 
  Bundle args = new Bundle(); 
  args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position); 
  fragment.setArguments(args); 
 
  // 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 
public void setTitle(CharSequence title) { 
  mTitle = title; 
  getActionBar().setTitle(mTitle); 
} 

public class MainActivity extends Activity { 
  private DrawerLayout mDrawerLayout; 
  private ActionBarDrawerToggle mDrawerToggle; 
  private CharSequence mDrawerTitle; 
  private CharSequence mTitle; 
  ... 
 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    ... 
 
    mTitle = mDrawerTitle = getTitle(); 
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    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) { 
        super.onDrawerClosed(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) { 
        super.onDrawerOpened(drawerView); 
        getActionBar().setTitle(mDrawerTitle); 
        invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
      } 
    }; 
 
    // Set the drawer toggle as the DrawerListener 
    mDrawerLayout.setDrawerListener(mDrawerToggle); 
  } 
 
  /* Called whenever we call invalidateOptionsMenu() */ 
  @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); 
  } 
} 

public class MainActivity extends Activity { 
  private DrawerLayout mDrawerLayout; 
  private ActionBarDrawerToggle mDrawerToggle; 
  ... 
 
  public void onCreate(Bundle savedInstanceState) { 
    ... 
 
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    mDrawerToggle = new ActionBarDrawerToggle( 
        this,         /* host Activity */ 
        mDrawerLayout,     /* DrawerLayout object */ 
        R.drawable.ic_drawer, /* nav drawer icon to replace 'Up' caret */ 
        R.string.drawer_open, /* "open drawer" description */ 
        R.string.drawer_close /* "close drawer" description */ 
        ) { 
 
      /** Called when a drawer has settled in a completely closed state. */ 
      public void onDrawerClosed(View view) { 
        super.onDrawerClosed(view); 
        getActionBar().setTitle(mTitle); 
      } 
 
      /** Called when a drawer has settled in a completely open state. */ 
      public void onDrawerOpened(View drawerView) { 
        super.onDrawerOpened(drawerView); 
        getActionBar().setTitle(mDrawerTitle); 
      } 
    }; 
 
    // Set the drawer toggle as the DrawerListener 
    mDrawerLayout.setDrawerListener(mDrawerToggle); 
 
    getActionBar().setDisplayHomeAsUpEnabled(true); 
    getActionBar().setHomeButtonEnabled(true); 
  } 
 
  @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); 
    mDrawerToggle.onConfigurationChanged(newConfig); 
  } 
 
  @Override 
  public boolean onOptionsItemSelected(MenuItem item) { 
    // Pass the event to ActionBarDrawerToggle, if it returns 
    // true, then it has handled the app icon touch event 
    if (mDrawerToggle.onOptionsItemSelected(item)) { 
     return true; 
    } 
    // Handle your other action bar items... 
 
    return super.onOptionsItemSelected(item); 
  } 
 
  ... 
}