AlertDialog Example

strings.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">AlertDialog</string>

    <string name="button_finish">Finish</string>

</resources>

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity" >

    <Button

        android:id="@+id/button_finish"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="30dp"

        android:text="@string/button_finish" />

</RelativeLayout>

MainActivity.java

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity {

       private AlertDialog alertDialog;

       private Button button;

       @Override

       protected void onCreate(Bundle savedInstanceState)

       {

          super.onCreate(savedInstanceState);

          setContentView(R.layout.activity_main);

          button=(Button)findViewById(R.id.button_finish);

          button.setOnClickListener(new OnClickListener() {

               

             @Override

             public void onClick(View v) {

               AlertDialog.Builder builder=new 

                    AlertDialog.Builder(MainActivity.this);

               builder.setTitle("Edit");

               builder.setMessage("are sure to edit");

               builder.setPositiveButton("ok",new 

                    FDialogInterface.OnClickListener() {

                  @Override

                  public void onClick(DialogInterface dialog, int which)

                  {

                   Toast.makeText(getApplicationContext(), "If you have to"

                   + " edit\n create custom dialog", Toast.LENGTH_LONG).show();

                         finish();

                  }

               });

               builder.setNegativeButton("cancel",new 

                    DialogInterface.OnClickListener()

               {

                    

                      @Override

                      public void onClick(DialogInterface dialog, int which)

                      {

                             finish();

                      }

               });

               alertDialog=builder.create();

               alertDialog.show();                    

                 }

          });

       }

}