Cannot resolve symbol KeyEventCompat（android.support.v4.view.KeyEventCompat找不到）
解决方案
KeyEventCompat类（我项目中用它的hasNoModifiers方法）最后查看源码 才知道这个hasNoModifiers方法已经被KeyEvent实现了。 贴出源码：
public boolean executeKeyEvent(KeyEvent event) {
//报错地方
// 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
//正确代码
if (event.hasNoModifiers()) {
handled = arrowScroll(FOCUS_FORWARD);
} else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
handled = arrowScroll(FOCUS_BACKWARD);
}
}