ShwetaChauhan18

view.systemUiVisibility = 
    // We wish to be laid out as if the
    // navigation bar was hidden
    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
    // We wish to be laid out fullscreen,
    // behind the status bar
    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
    // We wish to be laid out at
    // the most extreme scenario of any other flags
    View.SYSTEM_UI_FLAG_LAYOUT_STABLE 

ShwetaChauhan18

<!-- values/themes.xml -->
<style name="Theme.MyApp">
    <item name="android:navigationBarColor">
        #B3FFFFFF
    </item>
</style>

<!-- values-night/themes.xml -->
<style name="Theme.MyApp">
    <item name="android:navigationBarColor">

ShwetaChauhan18

<!-- values-v29/themes.xml -->
<style name="Theme.MyApp">
    <item name="android:navigationBarColor">
        @android:color/transparent
    </item>

    <!-- Optional, if drawing behind the status bar too -->
    <item name="android:statusBarColor">
        @android:color/transparent
    </item>

ShwetaChauhan18

public class BillPughSingleton {

    private BillPughSingleton(){}
    
    private static class BillPughSingletonInnerClass{
        private static final BillPughSingleton INSTANCE = new BillPughSingleton();
    }
    
    public static BillPughSingleton getInstance(){
        return BillPughSingletonInnerClass.INSTANCE;

ShwetaChauhan18

public static ThreadSafeSingleton getInstanceUsingDoubleLocking(){
    if(mThreadSafeSingleton == null){
        synchronized (ThreadSafeSingleton.class) {
            if(mThreadSafeSingleton == null){
                mThreadSafeSingleton = new ThreadSafeSingleton();
            }
        }
    }
    return mThreadSafeSingleton;
}

ShwetaChauhan18

public class ThreadSafeSingleton {

    private static ThreadSafeSingleton mThreadSafeSigleton;
    
    private ThreadSafeSingleton(){}
    
    public static synchronized ThreadSafeSingleton getThreadSafeSingleton(){
        if(mThreadSafeSigleton == null){
            mThreadSafeSigleton = new ThreadSafeSingleton();
        }

ShwetaChauhan18

class SingletonLazy{  
   private static SingletonLazy mSingletonLazy;  
   private SingletonLazy(){}  
   
   public static SingletonLazy getSingletonLazy(){  
     if (mSingletonLazy == null){   
         mSingletonLazy = new SingletonLazy();//instance will be created at request time               
     }  
    return mSingletonLazy;  
   }  

ShwetaChauhan18

public class Singleton {

    private static Singleton mSingleton = new Singleton(); //instance will be created at load time

    private Singleton(){}

    public static Singleton getInstance() {
        return mSingleton;
    }
}