I found a file in my Google documents that was partially inserted. Does that mean someone has invaded my security cameras? [on hold]

ava.util.ArrayList.size () & # 39; for a zero object reference
at huiyan.p2pipcam.adapter.CameraMoreAdapter.getCount (CameraMoreAdapter.java:50)
at android.widget.HeaderViewListAdapter.getCount (HeaderViewListAdapter.java:132)
at android.widget.ListView.setAdapter (ListView.java:575)
at huiyan.p2pwificam.listview.XListViewMore.setAdapter (XListViewMore.java:130)
at huiyan.p2pwificam.client.MoreWindowActivity.onCreate (MoreWindowActivity.java:107)
at android.app.Activity.performCreate (Activity.java:7023)
at android.app.Activity.performCreate (Activity.java:7014)
at android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2758)
at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2883)
at android.app.ActivityThread.-wrap11 (unknown source: 0)
at android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1613)
at android.os.Handler.dispatchMessage (Handler.java:106)
at android.os.Looper.loop (Looper.java:164)
at android.app.ActivityThread.main (ActivityThread.java:6523)
at java.lang.reflect.Method.invoke (native method)
at com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run (RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:857)