Didn't find class "android.support.design.widget.CoordinatorLayout" ...

Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.design.widget.CoordinatorLayout" ...
         at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
         at android.view.LayoutInflater.createView(LayoutInflater.java:583)
         at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
         at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
         at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
         at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
         at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
         at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:555) 
         at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161) 
         at com.ssc.football.sharevip.BrowserActivity.onCreate(BrowserActivity.java:30) 
         at android.app.Activity.performCreate(Activity.java:6278) 
         at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2396) 
         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2503) 
         at android.app.ActivityThread.-wrap11(ActivityThread.java) 
         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1353) 
         at android.os.Handler.dispatchMessage(Handler.java:102) 
         at android.os.Looper.loop(Looper.java:148) 
         at android.app.ActivityThread.main(ActivityThread.java:5529) 
         at java.lang.reflect.Method.invoke(Native Method) 
         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:745) 
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:635) 
         Suppressed: java.lang.ClassNotFoundException: android.support.design.widget.CoordinatorLayout
         at java.lang.Class.classForName(Native Method)
         at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
         at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
                 ... 22 more

解决方法：

因为使用的是 androidx

把xml布局文件里面的 android.support.design.widget.CoordinatorLayout

改成 

androidx.coordinatorlayout.widget.CoordinatorLayout

即可