java.lang.ClassCastException: android.support.v7.internal.widget.TintButton cannot be cast to android.support.v7.widget.GridLayout at com.education4all.mathcoach.TaskActivity.onCreate(TaskActivity.java:134)

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    • java.lang.ClassCastException: android.support.v7.internal.widget.TintButton cannot be cast to android.support.v7.widget.GridLayout at com.education4all.mathcoach.TaskActivity.onCreate(TaskActivity.java:134) at android.app.Activity.performCreate(Activity.java:4465) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2033) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2104) at android.app.ActivityThread.access$600(ActivityThread.java:132) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1157) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4575) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) at dalvik.system.NativeStart.main(Native Method)

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