Alert Dialog Example in Android

AlertDialogActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:tools="http://schemas.android.com/tools"
              android:id="@+id/activity_dialog"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:paddingBottom="@dimen/activity_vertical_margin"
              android:paddingLeft="@dimen/activity_horizontal_margin"
              android:paddingRight="@dimen/activity_horizontal_margin"
              android:paddingTop="@dimen/activity_vertical_margin"
              android:orientation="vertical"
              android:background="#79c9c2"
              tools:context="com.bhaumik.programmingstudy.AlertDialogActivity">

    <Button
            android:id="@+id/btn_simpleDialog"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Show Alert Dialog"
            android:textAllCaps="false"
            android:textSize="18dp"
            android:layout_gravity="center_horizontal"/>
</LinearLayout>

AlertDialogActivity.java

package com.bhaumik.programmingstudy;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class DialogActivity extends AppCompatActivity {

    Button btn;

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

        btn = (Button) findViewById(R.id.btn_simpleDialog);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder dialog = new AlertDialog.Builder(DialogActivity.this);
                dialog.setTitle("Message Dialog");
                dialog.setMessage("You h'v New Message");
                dialog.setPositiveButton("View", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        ToastMsg.ShowToast(DialogActivity.this,"Thank You");
                    }
                });
                dialog.setNegativeButton("Skip", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        ToastMsg.ShowToast(DialogActivity.this,"Skip Anyway");
                    }
                });
                dialog.show();
            }
        });
    }
}