How to show an Alert Dialog in Android

In this android programming source code example, we are going to show an Alert Dialog 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 show an Alert Dialog in Android.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context=".progressbar.ProgressBar17">

</android.support.constraint.ConstraintLayout>

MainActivity.java

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;


public class ProgressBar17 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_progress_bar17);

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("InduceSmile Code Snippet");
        builder.setMessage("This is Alert Dialog Box");
        final AlertDialog alertdialog = builder.create();
        alertdialog.show();

    }
}

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