Dialog boxes

A dialog is a small window that prompts the user to make a decision or enter additional information. A dialog does not fill the screen and is normally used for modal events that require users to take an action before they can proceed.

Create Alert  Dialog Boxes

package com.example.alertdialog;

import com.example.alertdialog.*;


import android.os.Bundle;import android.app.Activity;



import android.app.AlertDialog;



import android.content.DialogInterface;



import android.content.Intent;



import android.view.Menu;



import android.view.View;

public class MainActivity extends Activity {


   @Override

 protected void onCreate(Bundle savedInstanceState) {


      super.onCreate(savedInstanceState);



      setContentView(R.layout.activity_main);



   }





   public void open(View view){



      AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);



      alertDialogBuilder.setMessage(R.string.decision);



      alertDialogBuilder.setPositiveButton(R.string.positive_button, 



      new DialogInterface.OnClickListener() {





         @Override



         public void onClick(DialogInterface arg0, int arg1) {



            Intent positveActivity = new Intent(getApplicationContext(),com.example.alertdialog.PositiveActivity.class);



            startActivity(positveActivity);





         }



      });



      alertDialogBuilder.setNegativeButton(R.string.negative_button, 



      new DialogInterface.OnClickListener() {





         @Override



         public void onClick(DialogInterface dialog, int which) {



            Intent negativeActivity = new Intent(getApplicationContext(),com.example.alertdialog.NegativeActivity.class);



            startActivity(negativeActivity);



   }



      });





      AlertDialog alertDialog = alertDialogBuilder.create();



      alertDialog.show();





   }




   @Override



   public boolean onCreateOptionsMenu(Menu menu) {



      // Inflate the menu; this adds items to the action bar if it is present.



      getMenuInflater().inflate(R.menu.main, menu);



      return true;



   }



}