wie zu verwenden Zusammenbruch in der navigation Schublade

JS:

navigation drawer list class
  
  package com.example.navigation;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class NavDrawerListAdapter extends BaseAdapter {
    
    private Context context;
    private ArrayList<NavDrawerItem> navDrawerItems;
     
    public NavDrawerListAdapter(Context context, ArrayList<NavDrawerItem> navDrawerItems){
        this.context = context;
        this.navDrawerItems = navDrawerItems;
    }

    @Override
    public int getCount() {
        return navDrawerItems.size();
    }

    @Override
    public Object getItem(int position) {       
        return navDrawerItems.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater mInflater = (LayoutInflater)
                    context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.drawer_list_item, null);
        }
          
        ImageView imgIcon = (ImageView) convertView.findViewById(R.id.icon);
        TextView txtTitle = (TextView) convertView.findViewById(R.id.title);
        
          
        imgIcon.setImageResource(navDrawerItems.get(position).getIcon());        
        txtTitle.setText(navDrawerItems.get(position).getTitle());
         
       
         
        return convertView;
    }

}

CSS:

this is my main activity

package com.example.navigation;

import java.util.ArrayList;

import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.RelativeLayout;


public class MainActivity extends ActionBarActivity {
	
		private DrawerLayout mDrawerLayout;
		private ListView mDrawerList;
		private ActionBarDrawerToggle mDrawerToggle;
		protected RelativeLayout _completeLayout, _activityLayout;
		// nav drawer title
		private CharSequence mDrawerTitle;

		// used to store app title
		private CharSequence mTitle;

		private ArrayList<NavDrawerItem> navDrawerItems;
		private NavDrawerListAdapter adapter;

		@Override
		protected void onCreate(Bundle savedInstanceState) {
			super.onCreate(savedInstanceState);
			setContentView(R.layout.activity_main);
			// if (savedInstanceState == null) {
			// // on first time display view for first nav item
			// // displayView(0);
			// }
		}

		public void set(String[] navMenuTitles, TypedArray navMenuIcons) {
			mTitle = mDrawerTitle = getTitle();

			mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
			mDrawerList = (ListView) findViewById(R.id.left_drawer);

			navDrawerItems = new ArrayList<NavDrawerItem>();

			// adding nav drawer items
			if (navMenuIcons == null) {
				for (int i = 0; i < navMenuTitles.length; i++) {
					navDrawerItems.add(new NavDrawerItem(navMenuTitles[i]));
				}
			} else {
				for (int i = 0; i < navMenuTitles.length; i++) {
					navDrawerItems.add(new NavDrawerItem(navMenuTitles[i],
							navMenuIcons.getResourceId(i, -1)));
				}
			}

			mDrawerList.setOnItemClickListener(new SlideMenuClickListener());

			// setting the nav drawer list adapter
			adapter = new NavDrawerListAdapter(getApplicationContext(),
					navDrawerItems);
			mDrawerList.setAdapter(adapter);

			// enabling action bar app icon and behaving it as toggle button
			getSupportActionBar().setDisplayHomeAsUpEnabled(true);
			getSupportActionBar().setHomeButtonEnabled(true);
			// getSupportActionBar().setIcon(R.drawable.ic_drawer);

			mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
					R.drawable.ic_launcher, // nav menu toggle icon
					R.string.app_name, // nav drawer open - description for
					// accessibility
					R.string.app_name // nav drawer close - description for
			// accessibility
			) {
				public void onDrawerClosed(View view) {
					getSupportActionBar().setTitle(mTitle);
					// calling onPrepareOptionsMenu() to show action bar icons
					supportInvalidateOptionsMenu();
				}

				public void onDrawerOpened(View drawerView) {
					getSupportActionBar().setTitle(mDrawerTitle);
					// calling onPrepareOptionsMenu() to hide action bar icons
					supportInvalidateOptionsMenu();
				}
			};
			mDrawerLayout.setDrawerListener(mDrawerToggle);

		}

		private class SlideMenuClickListener implements
				ListView.OnItemClickListener {
			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position,
					long id) {
				// display view for selected nav drawer item
				displayView(position);
			}
		}

		@Override
		public boolean onCreateOptionsMenu(Menu menu) {
			// getSupportMenuInflater().inflate(R.menu.main, menu);
			return true;
		}

		@Override
		public boolean onOptionsItemSelected(MenuItem item) {

			if (item.getItemId() == android.R.id.home) {
				if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
					mDrawerLayout.closeDrawer(mDrawerList);
				} else {
					mDrawerLayout.openDrawer(mDrawerList);
				}
			}

			return super.onOptionsItemSelected(item);
		}

		/***
		 * Called when invalidateOptionsMenu() is triggered
		 */
		@Override
		public boolean onPrepareOptionsMenu(Menu menu) {
			// if nav drawer is opened, hide the action items
			// boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
			// menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
			return super.onPrepareOptionsMenu(menu);
		}

		/**
		 * Diplaying fragment view for selected nav drawer list item
		 * */
		private void displayView(int position) {

			switch (position) {
			case 0:
				Intent intent = new Intent(this, FirstActivity.class);
				startActivity(intent);
				finish();// finishes the current activity
				break;
			case 1:
				Intent intent1 = new Intent(this, SecondActivity.class);
				startActivity(intent1);
				finish();// finishes the current activity
				break;
			// case 2:
			// Intent intent2 = new Intent(this, third.class);
			// startActivity(intent2);
			// finish();
			// break;
			// case 3:
			// Intent intent3 = new Intent(this, fourth.class);
			// startActivity(intent3);
			// finish();
			// break;
			// case 4:
			// Intent intent4 = new Intent(this, fifth.class);
			// startActivity(intent4);
			// finish();
			// break;
			// case 5:
			// Intent intent5 = new Intent(this, sixth.class);
			// startActivity(intent5);
			// finish();
			// break;
			default:
				break;
			}

			// update selected item and title, then close the drawer
			mDrawerList.setItemChecked(position, true);
			mDrawerList.setSelection(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);
		}
	}

HTML:

drawer item

package com.example.navigation;

public class NavDrawerItem {
	private String title;
	private int icon;

	public NavDrawerItem() {
	}

	public NavDrawerItem(String title, int icon) {
		this.title = title;
		this.icon = icon;
	}

	public NavDrawerItem(String title) {
		this.title = title;
	}

	public String getTitle() {
		return this.title;
	}

	public int getIcon() {
		return this.icon;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public void setIcon(int icon) {
		this.icon = icon;
	}

}

Erstellte ich eine navigation Schublade Menü-item, aber das will ich jetzt schaffen Unterpunkt in der navigation Schublade Menü. Also wie kann ich das bitte machen Sie mir vielen Dank im Voraus

Hier ist meine navigation Schublade Menü Einzelteil-code, die wir r erstellt String.xml

CSS:

<string-array name="nav_drawer_items">
        <item>First</item>
        <item>Second</item>
        <item>Third</item>
        <item>Fourth</item>
        <item>Fifth</item>
        <item>Sixth</item>
       
    </string-array>