optimize resources

* remove redundant resources
* remove redundant code
* code optimization

project.properties

@@ -12,3 +12,5 @@
 
 # Project target.
 target=android-25
+manifestmerger.enabled=false
+android.package.excludes=info

src/com/fr3ts0n/stagefever/NavigationDrawerFragment.java

@@ -11,8 +11,6 @@
 import android.support.v4.view.GravityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.view.LayoutInflater;
-import android.view.Menu;
-import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
@@ -145,9 +143,12 @@ public void setUp(int fragmentId, DrawerLayout drawerLayout)
 				.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
 		// set up the drawer's list view with items and click listener
 
-		ActionBar actionBar = getActionBar();
-		actionBar.setDisplayHomeAsUpEnabled(true);
-		actionBar.setHomeButtonEnabled(true);
+		ActionBar actionBar = getActivity().getActionBar();
+		if (actionBar != null)
+		{
+			actionBar.setDisplayHomeAsUpEnabled(true);
+			actionBar.setHomeButtonEnabled(true);
+		}
 
 		// ActionBarDrawerToggle ties together the the proper interactions
 		// between the navigation drawer and the action bar app icon.
@@ -257,8 +258,8 @@ public void onAttach(Activity activity)
 	@Override
 	public void onDetach()
 	{
-		super.onDetach();
 		mCallbacks = null;
+		super.onDetach();
 	}
 
 	@Override
@@ -276,47 +277,10 @@ public void onConfigurationChanged(Configuration newConfig)
 		mDrawerToggle.onConfigurationChanged(newConfig);
 	}
 
-	@Override
-	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
-	{
-		// If the drawer is open, show the global app actions in the action bar. See
-		// also
-		// showGlobalContextActionBar, which controls the top-left area of the
-		// action bar.
-		if (mDrawerLayout != null && isDrawerOpen())
-		{
-			inflater.inflate(R.menu.global, menu);
-			showGlobalContextActionBar();
-		}
-		super.onCreateOptionsMenu(menu, inflater);
-	}
-
 	@Override
 	public boolean onOptionsItemSelected(MenuItem item)
 	{
-		if (mDrawerToggle.onOptionsItemSelected(item))
-		{
-			return true;
-		}
-
-		return super.onOptionsItemSelected(item);
-	}
-
-	/**
-	 * Per the navigation drawer design guidelines, updates the action bar to show
-	 * the global app 'context', rather than just what's in the current screen.
-	 */
-	private void showGlobalContextActionBar()
-	{
-		ActionBar actionBar = getActionBar();
-		actionBar.setDisplayShowTitleEnabled(true);
-		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
-		actionBar.setTitle(R.string.app_name);
-	}
-
-	private ActionBar getActionBar()
-	{
-		return getActivity().getActionBar();
+		return mDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);
 	}
 
 	/**