java.lang.RuntimeException

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    • java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.whiteboard/com.example.whiteboard.SignedIn}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) at android.app.ActivityThread.access$800(ActivityThread.java:135) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5017) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' at android.app.ListActivity.onContentChanged(ListActivity.java:243) at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:293) at android.app.Activity.setContentView(Activity.java:1929) at com.example.whiteboard.SignedIn.onCreate(SignedIn.java:35) at android.app.Activity.performCreate(Activity.java:5231) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) ... 11 more

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