点击空白处，关闭软件盘

//点击空白处，隐藏软键盘
@Override
public boolean onTouchEvent(MotionEvent event) {
    InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        if (getCurrentFocus() != null && getCurrentFocus().getWindowToken() != null) {
            imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }
    return super.onTouchEvent(event);
}