How to create full width Navigation Drawer in Android

In this android programming source code example, we are going to create full width navigation drawer in android.

You can copy and adopt this source code example to your android project without reinventing the wheel.

Below is a step by step source code to create full width navigation drawer in android.

activity_main.xml

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorPrimary"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />

    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawerLayout"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:layout_below="@id/toolbar">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Navigation Drawer"
            android:gravity="center_horizontal|center_vertical"/>

        <android.support.design.widget.NavigationView
            android:id="@+id/shitstuff"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            app:headerLayout="@layout/drawer_header"
            app:itemTextColor="#000000"
            app:menu="@menu/drawermenu" />

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

</RelativeLayout>

MainActivity.java

import android.util.DisplayMetrics;
import android.util.Log;
import android.support.design.widget.NavigationView;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MenuInflater;
import android.view.Menu;
import android.widget.Toast;
import android.content.Intent;


public class NavigationViewActivity3 extends AppCompatActivity{
    private DrawerLayout mDrawerLayout;
    private NavigationView mNavigationView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_navigation_view3);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
        mNavigationView = (NavigationView) findViewById(R.id.shitstuff) ;
        setfullwidth();
        ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout, toolbar,R.string.app_name, R.string.app_name);
        mDrawerLayout.addDrawerListener(mDrawerToggle);
        mDrawerToggle.syncState();
    }

    private void setfullwidth(){
        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        DrawerLayout.LayoutParams params = (DrawerLayout.LayoutParams) mNavigationView.getLayoutParams();
        params.width = displayMetrics.widthPixels;
        mNavigationView.setLayoutParams(params);
    }
}

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