How to check exit confirmation on clicking back button in Android App?
In this video it shows the code to check exit confirmation on clicking back button in Android App. Basically, for this implementation it follows below two steps:
1. Override OnBackPressedCallback method.
2. Create and Show AlertDialog
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Complete source code and other details/ steps of this video are posted in the below link:
https://programmerworld.co/android/ho...
However, the main Java code is copied below also for reference:
package com.programmerworld.exitconfirmationonbackbuttonpress;
import android.content.DialogInterface;
import android.os.Bundle;
import androidx.activity.EdgeToEdge;
import androidx.activity.OnBackPressedCallback;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EdgeToEdge.enable(this);
setContentView(R.layout.activity_main);
ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) - {
Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
@Override
public void handleOnBackPressed() {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(MainActivity.this);
alertDialogBuilder.setMessage("Do you want to exit?");
alertDialogBuilder.setCancelable(true)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finishAndRemoveTask();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
});
return insets;
});
}
}
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