Creating Alert dialogue boxes in Android:

public class ButtoneventActivity extends Activity implements View.OnClickListener {

    /** Called when the activity is first created. */

                private Button b1;

                private Button b2;

                private Button b3;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        b1=(Button)findViewById(R.id.button1);

        b1.setText("Click");

        b1.setOnClickListener(this);

        b2=(Button)findViewById(R.id.button2);

        b2.setText("alert");

        b2.setOnClickListener(this);

        b3=(Button)findViewById(R.id.button3);

        b3.setText("Conform");

        b3.setOnClickListener(this);

    }

                @Override

                public void onClick(View view) {

                                // TODO Auto-generated method stub

                                if(view==b1){

                                                AlertDialog showAlert=new AlertDialog.Builder(this).create();

                                                 showAlert.setTitle("it's clicked");

                                                 showAlert.setMessage("are you sure you want to Burn?");

                                                 showAlert.setButton("Burn",new OnClickListener(){

                                                                @Override

                                              public void onClick(DialogInterface dialog, int which) {

                                                                   // TODO Auto-generated method stub

                                                                                dialog.cancel();

                                                                }                                                             

                                                  });

                                                 showAlert.show();                         

                                        }

                                else if(view==b2){

                                               AlertDialog showAlert=new AlertDialog.Builder(this).create();

                                                 showAlert.setTitle("Button clicked");

                                                 showAlert.setMessage("are you sure you want to save?");

                                                 showAlert.setButton("save",new OnClickListener() {

                                                                @Override

                                                 public void onClick(DialogInterface dialog, int which) {

                                                                    // TODO Auto-generated method stub

                                                                                 dialog.cancel();

                                                                }       

                                       });

                                                 showAlert.setButton2("Cancle",new OnClickListener(){

                                                                                @Override

                                            public void onClick(DialogInterface dialog, int which) {

                                                                  //TODO Auto-generated method stub

                                                                                                 dialog.cancel();

                                                                                                                                                                                                       

                                       }                                 

                             });

                                                 showAlert.show();

                                }

                                else if(view==b3){

                                                AlertDialog showAlert=new AlertDialog.Builder(this).create();

                                                 showAlert.setTitle("Button clicked");

                                                 showAlert.setMessage("are you sure you want to save?");

                                                 showAlert.setButton("Yes",new OnClickListener(){

                                                                @Override

                                                  public void onClick(DialogInterface dialog, int which) {

                                                                        // TODO Auto-generated method stub

                                                                                 dialog.cancel();

                                                                }               

                               });

                                                 showAlert.setButton2("NO",new OnClickListener(){

                                                                                @Override

                                                      public void onClick(DialogInterface dialog, int which) {

                                                                               // TODO Auto-generated method stub

                                                                                                 dialog.cancel();               

                                                                                }     

                                                           });

                                                 showAlert.setButton3("Cancle",new OnClickListener(){

                                                                                @Override

                                     public void onClick(DialogInterface dialog, int which) {

                                                                // TODO Auto-generated method stub

                                                                                                 dialog.cancel();

                                                                                }      

                                        });  

                                  showAlert.show();   

                                               }

                             }

    }