android界面有输入框时,点击空白处,隐藏键盘并且清除焦点

//事件分发控制
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (ev.getAction() == MotionEvent.ACTION_DOWN) {
        View view = getCurrentFocus();
        if (isHideInput(view, ev)) {
            HideSoftInput(view.getWindowToken());
            view.clearFocus();
        }
    }
    return super.dispatchTouchEvent(ev);
}
/**
 * 判定是否需要隐藏
 */
private boolean isHideInput(View v, MotionEvent ev) {
    if (v != null && (v instanceof EditText)) {
        int[] l = {0, 0};
        v.getLocationInWindow(l);
        int left = l[0], top = l[1], bottom = top + v.getHeight(), right = left + v.getWidth();
        if (ev.getX() > left && ev.getX() < right && ev.getY() > top && ev.getY() < bottom) {
            return false;
        } else {
            return true;
        }
    }
    return false;
}
/**
 * 隐藏软键盘
 */
private void HideSoftInput(IBinder token) {
    if (token != null) {
        InputMethodManager manager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        manager.hideSoftInputFromWindow(token, InputMethodManager.HIDE_NOT_ALWAYS);
    }
}