View$OnUnhandledKeyEventListener怎么整?

在运行程序时碰到如下Info级日志，对于一个不能见黄、红、灰代码洁癖的人来说，这样的art日志是不能接受的。

Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
at void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2463)
at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:938)
at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:806)

如果运行时设备低于28，则找不到该类，但运行时没有致命错误，程序不会崩溃。出现它的原因是低于 API 28的设备中，Android系统没有View#OnUnhandledKeyEventListener这个接口类，而28及以上引入了这个接口类。

解决的方案
如果实在不想看到警告告示，只能将compileSdkVersion降级到27及以下。
但是这种方案我不喜欢，我就要用高的SDK怎么了，怎么了，来打我呀。

我们先来认识下它

    /**
     * Interface definition for a callback to be invoked when a hardware key event hasn't
     * been handled by the view hierarchy.
     */
    public interface OnUnhandledKeyEventListener {
        /**
         * Called when a hardware key is dispatched to a view after being unhandled during normal
         * {@link KeyEvent} dispatch.
         *
         * @param v The view the key has been dispatched to.
         * @param event The KeyEvent object containing information about the event.
         * @return {@code true} if the listener has consumed the event, {@code false} otherwise.
         */
        boolean onUnhandledKeyEvent(View v, KeyEvent event);
    }

本文地址：https://blog.csdn.net/luo_boke/article/details/107866148