Double Tap to exit in application in android studio

In this blog, I am going to show you how you can exit the application when you pressed back button at a given interval of time 
So let's Start.

Open Your YourActivity.class and write this code

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Toast;

import com.google.android.material.snackbar.BaseTransientBottomBar;
import com.google.android.material.snackbar.Snackbar;

public class MainActivity extends AppCompatActivity {
    
    final int duration = 2000;
    boolean doubleTapToExit = false;
    View view;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        view = findViewById(android.R.id.content);
    }
    @Override
    public void onBackPressed() {
        if (doubleTapToExit) {
            super.onBackPressed();
            return;
        } else {
            doubleTapToExit = true;
            Snackbar.make(view, "Presses again to exit..", duration).show();
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    doubleTapToExit = false;
                }
            }, duration);
        }
    }
}

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