Cannot resolve symbol KeyEventCompat（android.support.v4.view.KeyEventCompat找不到）
解決方案
KeyEventCompat類（我項目中用它的hasNoModifiers方法）最後查看源碼 才知道這個hasNoModifiers方法已經被KeyEvent實現了。 貼出源碼：

public boolean executeKeyEvent(KeyEvent event) {
//報錯地方
                    // The focus finder had a bug handling FOCUS_FORWARD and FOCUS_BACKWARD
                    // before Android 3.0. Ignore the tab key on those devices.
//                  if (KeyEventCompat.hasNoModifiers(event)) {
//                      handled = arrowScroll(FOCUS_FORWARD);
//                  } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) {
//                      handled = arrowScroll(FOCUS_BACKWARD);
//                  }


//                  http://blog.csdn.net/lrpshuai/article/details/78392872

//正確代碼
                    if (event.hasNoModifiers()) {
                        handled = arrowScroll(FOCUS_FORWARD);
                    } else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
                        handled = arrowScroll(FOCUS_BACKWARD);
                    }
}
 

Cannot resolve symbol KeyEventCompat（android.support.v4.view.KeyEventCompat找不到）