添加space_key, enter_key, clear_key, delete_key的处理。

final EditText view = (EditText) mInflater.inflate(R.layout.sms_receipient_input, null);
view.setOnKeyListener(new View.OnKeyListener() {
   
    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        String txt = view.getText().toString();
        if(event.getAction() == KeyEvent.ACTION_DOWN) {
            switch(keyCode) {
            case KeyEvent.KEYCODE_SPACE:
            case KeyEvent.KEYCODE_ENTER:
                if(!TextUtils.isEmpty(txt)) {
                    mViewGroup.addView(getRecipientItem(null, txt), mViewGroup.getChildCount()-2);
                    view.setText("");
                }
                break;
            case KeyEvent.KEYCODE_CLEAR:
            case KeyEvent.KEYCODE_DEL:
                int count = mViewGroup.getChildCount();
                if(count>2){
                    mViewGroup.getChildAt(count-3).performClick();
                }
                break;
            }
        }
        return false;
    }
});