小疑点：发送短信的小程序，求回答！多谢啦

BUTTON_SENDMESSAGE.setOnClickListener(new Button.OnClickListener()        {                        public void onClick(View v)             {                 SmsManager smsmanager=SmsManager.getDefault();                 String number=EDITTEXT_NUMMESSAGE.getText().toString();                 String text=EDITTEXT_CONTENTMESSAGE.getText().toString();                                                       PendingIntent mPI=PendingIntent.getBroadcast(message_activity.this, 0, new Intent(), 0);                     smsmanager.sendTextMessage(number,null,text,mPI,null);                              }                });