java.lang.IllegalStateException: Could not find method myClick(View) in a parent or ancestor Context for android:onClick attribute defined on view class com.google.android.material.button.MaterialButt

Android开发报错：

java.lang.IllegalStateException: Could not find method myClick(View) in a parent or ancestor Context for android:onClick attribute defined on view class com.google.android.material.button.MaterialButton.

我的错误点：函数写成private了，直接去掉也会出错，要写成public，此时myClick也变成黄色了，然后跳转成功了。