问由于InstallException，安卓PopUp未显示

EN

        Button boton = (Button) this.findViewById(R.id.button1);
    boton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            AlertDialog.Builder builderDlg = new AlertDialog.Builder(MainActivity.this);
              builderDlg.setTitle("Exit");
              builderDlg.setMessage("¿Usted quiere retirarse?");
              builderDlg.setCancelable(false);
              builderDlg.setPositiveButton("Si",new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    MainActivity.this.finish();

                }
            });

              builderDlg.setNegativeButton("No",new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();

                }
            });
        }
    });

[2013-02-17 19:35:33 - DialogPopUp] Failed to install DialogPopUp.apk on device 'emulator-5554': device not found
[2013-02-17 19:35:33 - DialogPopUp] com.android.ddmlib.InstallException: device not found
[2013-02-17 19:35:33 - DialogPopUp] Launch canceled!