AlertDialog Box With Two Buttons In Android

A dialog is usually a small window that appears in front of the current Activity. The underlying Activity loses focus and the dialog accepts all user interaction. Dialogs are normally used for notifications that should interupt the user and to perform short tasks that directly relate to the application in progress (such as a progress bar or a login prompt).

 
Declare the AlertDialog 

            Builder b=new AlertDialog.Builder(this);

Set Title

            b.setTitle("Class Changing Activity....");

 Set Message

            b.setMessage("Do you want to go next class ?");

 Button Creation 

Here we setting the two buttons with 

setPositiveButton()

setNegativeButton() methods

b.setPositiveButton("YES", new DialogInterface.OnClickListener() {
               
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub

                startActivity(new Intent(AlertDialog1Activity.this, SecondActivity.class));
                }
         });

b.setNegativeButton("No", new DialogInterface.OnClickListener() {
           
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
               Toast.LENGTH_LONG).show();
                AlertDialog1Activity.this.finish();
            }
        });


 Create and Show the AlertDialog 

AlertDialog d=b.create();
        d.show();

Example Program


package com.android.alert1;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class AlertDialog1Activity extends Activity {
    Button btn;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //btn=(Button)findViewById(R.id.button1);
       
    }
    public void MyClick(View v){
        showDialog(10);
       
        }   
    public Dialog onCreateDialog(int id){
        switch(id){
        case 10:
            Builder b=new AlertDialog.Builder(this);
            b.setMessage("Do you want to go next class ?");
            b.setCancelable(true);
            b.setPositiveButton("YES", new DialogInterface.OnClickListener() {
               
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub

                startActivity(new Intent(AlertDialog1Activity.this, SecondActivity.class));
                }
            });
        b.setNegativeButton("No", new DialogInterface.OnClickListener() {
           
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                //Toast.makeText(getApplicationContext(), "This will continue", Toast.LENGTH_LONG).show();
                AlertDialog1Activity.this.finish();
            }
        });
        AlertDialog d=b.create();
        d.show();
                }
              
        return super.onCreateDialog(id);
       
    }
}

SecondActivity.class


package com.android.alert1;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class SecondActivity extends Activity{
   

        public void onCreate(Bundle savedInstanceState){
            super.onCreate(savedInstanceState);
            setContentView(R.layout.sec);
                   
                }
}



main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <Button android:text="Show Message"
       android:layout_marginTop="120dp"
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
         android:clickable="true"
          android:onClick="MyClick"
          android:textStyle="bold"></Button>
</LinearLayout>

sec.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button"
        android:onClick="onClick" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is the Second Page"
        android:layout_marginTop="200dp"
        android:layout_marginLeft="40dp"
        android:textColor="#FF0000"
        android:textStyle="bold"
        android:textAppearance="?android:attr/textAppearanceLarge" />
   
</LinearLayout>