java.lang.RuntimeException

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    • java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lagistos.memalela/com.lagistos.memalela.MainTeacher}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2643) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2723) at android.app.ActivityThread.access$800(ActivityThread.java:178) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1553) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5791) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1109) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:875) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at com.lagistos.memalela.MainTeacher.onClickInitialize(MainTeacher.java:164) at com.lagistos.memalela.MainTeacher.onCreate(MainTeacher.java:58) at android.app.Activity.performCreate(Activity.java:6178) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1115) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2590)
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