如何在所有活动中显示导航抽屉？

Question

我的Navigation Drawer所有活动中都应该出现一个。

我看到许多与此类似的问题，并找到了一个解决方案，例如通过其他活动扩展MainActivity。

所以我将我的主要活动扩展到了我的第二个活动。但是第二个活动中没有显示抽屉

主要活动

public class MainActivity extends ActionBarActivity
{
    private ListView mDrawerList;
    private DrawerLayout mDrawer;
    private CustomActionBarDrawerToggle mDrawerToggle;
    private String[] menuItems;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    supportRequestWindowFeature(WindowCompat.FEATURE_ACTION_BAR);
    // getSupportActionBar().hide();
    setContentView(R.layout.activity_main_drawer);

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

    mDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);

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

    _initMenu();
    mDrawerToggle = new CustomActionBarDrawerToggle(this, mDrawer);
    mDrawer.setDrawerListener(mDrawerToggle);

}

private void _initMenu()
{
    NsMenuAdapter mAdapter = new NsMenuAdapter(this);

    // Add Header
    mAdapter.addHeader(R.string.ns_menu_main_header);

    // Add first block

    menuItems = getResources().getStringArray(R.array.ns_menu_items);
    String[] menuItemsIcon = getResources().getStringArray(R.array.ns_menu_items_icon);

    int res = 0;
    for (String item : menuItems)
    {

        int id_title = getResources().getIdentifier(item, "string", this.getPackageName());
        int id_icon = getResources().getIdentifier(menuItemsIcon[res], "drawable", this.getPackageName());

        NsMenuItemModel mItem = new NsMenuItemModel(id_title, id_icon);
        // if (res==1) mItem.counter=12; //it is just an example...
        // if (res==3) mItem.counter=3; //it is just an example...
        mAdapter.addItem(mItem);
        res++;
    }

    mAdapter.addHeader(R.string.ns_menu_main_header2);

    mDrawerList = (ListView) findViewById(R.id.drawer);
    if (mDrawerList != null)
        mDrawerList.setAdapter(mAdapter);

    mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

}

@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 onCreateOptionsMenu(Menu menu)
{
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.control_menu, menu);
    return super.onCreateOptionsMenu(menu);
}

/* 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 = mDrawer.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.action_keyboard).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item)
{
    /*
     * The action bar home/up should open or close the drawer.
     * ActionBarDrawerToggle will take care of this.
     */
    if (mDrawerToggle.onOptionsItemSelected(item))
    {
        return true;
    }

    // Handle your other action bar items...
    return super.onOptionsItemSelected(item);
}

private class CustomActionBarDrawerToggle extends ActionBarDrawerToggle
{

    public CustomActionBarDrawerToggle(Activity mActivity, DrawerLayout mDrawerLayout)
    {
        super(mActivity, mDrawerLayout, R.drawable.ic_drawer, R.string.ns_menu_open, R.string.ns_menu_close);
    }

    @Override
    public void onDrawerClosed(View view)
    {
        getSupportActionBar().setTitle(getString(R.string.ns_menu_close));
        supportInvalidateOptionsMenu(); // creates call to
                                        // onPrepareOptionsMenu()
    }

    @Override
    public void onDrawerOpened(View drawerView)
    {
        getSupportActionBar().setTitle(getString(R.string.ns_menu_open));
        supportInvalidateOptionsMenu(); // creates call to
                                        // onPrepareOptionsMenu()
    }
}

private class DrawerItemClickListener implements ListView.OnItemClickListener
{

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id)
    {
        Intent intent = new Intent(MainActivity.this, Tutorial.class);
        startActivity(intent);

    }

}

 }

第二活动

 public class Tutorial extends MainActivity
{
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.help);
    }

}

Answer 1

在in中onCreate，TutorialActivity不要调用setContentView此方法：

@Override
protected void onCreate(Bundle savedInstanceState)
{
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    LayoutInflater inflater = (LayoutInflater) this
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View contentView = inflater.inflate(R.layout.help, null, false);
    mDrawer.addView(contentView, 0); 
}

使mDrawer在MainActivity保护。并
R.layout.activity_main_drawer只需将抽屉标签和重力保持在左侧（或右侧）。