Navigation Drawer helps developers for creating easy menus in an application.
Lets start to see how it works.
We will start by creating a new project with a navigation drawer activity.
Adding Navigation Drawer Activity
If you want to add Navigation Drawer Activity to your existing project you can simply add it by going to your package -> right click -> new -> activity -> navigation drawer activity
This is the simplest way for creating a navigation drawer activity.
Navigation Drawer Menus
To change the menu open the activity_main_drawer.xml inside menu folder.
This is my activity_main_drawer.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="@+id/nav_camera"
android:icon="@drawable/ic_menu_camera"
android:title="Import" />
<item
android:id="@+id/nav_gallery"
android:icon="@drawable/ic_menu_gallery"
android:title="Gallery" />
<item
android:id="@+id/nav_slideshow"
android:icon="@drawable/ic_menu_slideshow"
android:title="Slideshow" />
<item
android:id="@+id/nav_manage"
android:icon="@drawable/ic_menu_manage"
android:title="Tools" />
</group>
<item android:title="Communicate">
<menu>
<item
android:id="@+id/nav_share"
android:icon="@drawable/ic_menu_share"
android:title="Share" />
<item
android:id="@+id/nav_send"
android:icon="@drawable/ic_menu_send"
android:title="Send" />
</menu>
</item>
</menu>
Try changing the values and run.
Handling Events
Open you activity which has the Drawer in it. It will contain a method like this.
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
Changing Screens using Fragments for each MenuItem
For Simplicity, I am creating a Fragment for all the Menu Items which has a layout with only a TextView.
Layout Change
We will add a FrameLayout inside the content_home.xml for adding and replacing Fragments.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="net.simplifiedcoding.navigationdrawerexample.MainActivity"
tools:showIn="@layout/app_bar_main">
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
MenuFragment
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MenuScreen extends Fragment {
private String menuText;
public static MenuScreen newInstance(String menuText) {
MenuScreen fragment = new MenuScreen();
this.menuText = menuText;
return fragment;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable
ViewGroup container, @Nullable Bundle savedInstanceState) {
TextView tv = new TextView(this);
tv.setText(menuText);
return tv;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle(menuText);
}
}
Adding Screens for each Menu
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
MenuFragment menuFragment = null;
if (id == R.id.nav_camera) {
menuFragment = MenuFragment.newInstance("Menu 1");
} else if (id == R.id.nav_gallery) {
menuFragment = MenuFragment.newInstance("Menu 2");
} else if (id == R.id.nav_slideshow) {
menuFragment = MenuFragment.newInstance("Menu 3");
} else if (id == R.id.nav_manage) {
menuFragment = MenuFragment.newInstance("Menu 4");
} else if (id == R.id.nav_share) {
menuFragment = MenuFragment.newInstance("Menu 5");
} else if (id == R.id.nav_send) {
menuFragment = MenuFragment.newInstance("Menu 6");
}
// replacing the fragment
if (menuFragment != null) {
FragmentTransaction ft = getSupportFragmentManager()
.beginTransaction();
ft.replace(R.id.content_frame, fragment).commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
Display First Screen
To Display the first screen we will add the first fragment in the onCreate of the Activity.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar,
R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView)
findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
if (savedInstanceState == null) {
EmployeeFragmentFragment employeeFragmentFragment =
new EmployeeFragmentFragment();
FragmentTransaction ft = getSupportFragmentManager()
.beginTransaction();
ft.add(R.id.content_frame, employeeFragmentFragment).commit();
}
}
All Done.
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