Android Error

2018-12-11 11:49:38.769 29625-29625/org.something.offline E/AndroidRuntime: FATAL EXCEPTION: main
    Process: org.something.offline, PID: 29625
    java.lang.RuntimeException: Unable to start activity ComponentInfo{org.something.offline/org.something.offline.MainActivity}: android.view.InflateException: Binary XML file line #6: Binary XML file line #6: Error inflating class org.xwalk.core.XWalkView
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2904)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2986)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1671)
        at android.os.Handler.dispatchMessage(Handler.java:108)
        at android.os.Looper.loop(Looper.java:206)
        at android.app.ActivityThread.main(ActivityThread.java:6784)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:852)
     Caused by: android.view.InflateException: Binary XML file line #6: Binary XML file line #6: Error inflating class org.xwalk.core.XWalkView
     Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class org.xwalk.core.XWalkView
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
        at android.view.LayoutInflater.createView(LayoutInflater.java:647)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:428)
        at android.app.Activity.setContentView(Activity.java:2659)
        at org.something.offline.MainActivity.onCreate(MainActivity.java:27)
        at android.app.Activity.performCreate(Activity.java:6984)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1235)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2857)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2986)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1671)
        at android.os.Handler.dispatchMessage(Handler.java:108)
        at android.os.Looper.loop(Looper.java:206)
        at android.app.ActivityThread.main(ActivityThread.java:6784)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:852)
     Caused by: junit.framework.AssertionFailedError: Please have your activity extend XWalkActivity for shared mode
        at junit.framework.Assert.fail(Assert.java:50)
        at org.xwalk.core.XWalkCoreWrapper.initEmbeddedMode(XWalkCoreWrapper.java:200)
        at org.xwalk.core.XWalkView.reflectionInit(XWalkView.java:897)
        at org.xwalk.core.XWalkView.<init>(XWalkView.java:225)
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
        at android.view.LayoutInflater.createView(LayoutInflater.java:647)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:428)
        at android.app.Activity.setContentView(Activity.java:2659)
        at org.something.offline.MainActivity.onCreate(MainActivity.java:27)
        at android.app.Activity.performCreate(Activity.java:6984)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1235)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2857)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2986)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1671)
        at android.os.Handler.dispatchMessage(Handler.java:108)
        at android.os.Looper.loop(Looper.java:206)
        at android.app.ActivityThread.main(ActivityThread.java:6784)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:852)