Android Navigation Drawer

AndroidNavigationDrawer

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.view.MenuItem;
import android.view.View;
import android.widget.RelativeLayout;


public class MainActivity extends ActionBarActivity {

	// UI elements
	private static DrawerLayout mDrawerLayout = null;
	private static ActionBarDrawerToggle mDrawerToggle = null;

	/** Close the menu drawer */
	public static void closeDrawer(String name) {
		if (!(name == null)) {
			mTitle = name;
		}
		mDrawerLayout.closeDrawer(mLayoutDrawer);
	}

	// Titles
	private CharSequence mDrawerTitle;
	
	private FragmentManager mFragmentManager;

	private static RelativeLayout mLayoutDrawer;

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

		mFragmentManager = getSupportFragmentManager();

		createFragments();

		// Replace the layout inside the drawer layout with Drawer Menu fragment
		configDrawerMenu();

		// Set Title
		mTitle = mDrawerTitle = getTitle();
		// Get layout drawer
		mLayoutDrawer = (RelativeLayout) findViewById(R.id.drawerContainer);

		// Set drawer Layout
		mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

		// Configurate Drawer toggle
		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);
				getSupportActionBar().setTitle(mDrawerTitle);
				ActivityCompat.invalidateOptionsMenu(MainActivity.this);

			}

			/** Called when a drawer has settled in a completely open state. */
			public void onDrawerOpened(View drawerView) {
				super.onDrawerOpened(drawerView);
				getSupportActionBar().setTitle(mDrawerTitle);
				ActivityCompat.invalidateOptionsMenu(MainActivity.this);

			}
		};

		mDrawerLayout.setDrawerListener(mDrawerToggle);
		// Display icons in action bar
		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
		getSupportActionBar().setHomeButtonEnabled(true);

	}
	@Override
	public void onBackPressed() {
		super.onBackPressed();
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Show drawer menu
		if (mDrawerToggle.onOptionsItemSelected(item))
			return (true);
		return (super.onOptionsItemSelected(item));
	}

	@Override
	protected void onPostCreate(Bundle savedInstanceState) {
		super.onPostCreate(savedInstanceState);
		mDrawerToggle.syncState();
	}

	/**
	 * Replace the layout fragment in the layout drawer with the DrawerMenu
	 * Fragment
	 */
	private void configDrawerMenu() {

		// Get the fragment instance
		Fragment fragment = DrawerMenu.newInstance();

		// Insert the fragment by replacing any existing fragment
		mFragmentManager
				.beginTransaction()
				.replace(R.id.left_drawer_container, fragment,
						DrawerMenu.FRAGMENT_TAG).commit();
	}

	

	private void createFragments() {
		
		if(isFirstTimeOpeningApp()){
			showWelcomeFragment();
		}else{// Add Overview fragment
			showOverviewFragment();			
		}
		//Set the preference and the welcome view dont show again 
		storeFirstTimeOpeningApp();
		// Operation Handler
		configurateOperationHandler();
	
	}

	private void showWelcomeFragment() {
		...		
	}
	private boolean isFirstTimeOpeningApp() {
		SharedPreferences sharedPreferences = getSharedPreferences(Constant.SHARED_PREF, Context.MODE_PRIVATE);
		Boolean firstTime=sharedPreferences.getBoolean(Constant.SHARED_PREF_FIRST_TIME, true);		
		return firstTime;
	}
        private void storeFirstTimeOpeningApp() {
		SharedPreferences sharedPreferences = getSharedPreferences(Constant.SHARED_PREF, Context.MODE_PRIVATE);
		
		Editor editor = sharedPreferences.edit();
		editor.putBoolean(Constant.SHARED_PREF_FIRST_TIME, false);
	    editor.commit();

	}
	
	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		super.onConfigurationChanged(newConfig);
		mDrawerToggle.onConfigurationChanged(newConfig);
	}

	/** Show the Overview Fragment */
	private void showOverviewFragment() {
		...
	}
}

drawer_layout.xml

<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" >

    <!-- The main content view -->

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

    <!-- The navigation drawer -->

    <RelativeLayout
        android:id="@+id/drawerContainer"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start" >

        <FrameLayout
            android:id="@+id/left_drawer_container"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:background="@color/Holo_bg_grey" />
    </RelativeLayout>

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