EditText

사용자 입력에 사용하는 에디트 텍스트 ( 텍스트 입력 박스 )
In this section, you will create a text field for user input, using the EditText widget.
텍스트입력 박스에서 Enter Key 를 누르면 메시지 출력하기....^^
Once text has been entered into the field, the "Enter" key will display the text in a toast message.

final EditText edittext = (EditText) findViewById(R.id.edittext);
edittext.setOnKeyListener(new OnKeyListener() {    

     public boolean onKey(View v, int keyCode, KeyEvent event) {        
    // If the event is a key-down event on the "enter" button        
    if ((event.getAction() == KeyEvent.ACTION_DOWN) &&            
                  (keyCode == KeyEvent.KEYCODE_ENTER)) {          
              // Perform action on key press          
              Toast.makeText(HelloFormStuff.this, edittext.getText(), Toast.LENGTH_SHORT).show();         
              return true;       
    }       
    return false;    
   }
});