NPE crash after key and config regeneration #141
Description
Version Information
App Version: v0.14.54
Syncthing Version: v0.14.54
Android Log
2018-12-18 11:51:37.314 14256-14256/com.github.catfriend1.syncthingandroid.debug E/AndroidRuntime: FATAL EXCEPTION: main Process: com.github.catfriend1.syncthingandroid.debug, PID: 14256 java.lang.StringIndexOutOfBoundsException: length=0; index=7 at java.lang.String.substring(String.java:2032) at com.nutomic.syncthingandroid.model.Device.getDisplayName(Device.java:23) at com.nutomic.syncthingandroid.views.DevicesAdapter.getView(DevicesAdapter.java:46) at android.widget.AbsListView.obtainView(AbsListView.java:2366) at android.widget.ListView.makeAndAddView(ListView.java:2052) at android.widget.ListView.fillDown(ListView.java:786) at android.widget.ListView.fillFromTop(ListView.java:847) at android.widget.ListView.layoutChildren(ListView.java:1798) at android.widget.AbsListView.onLayout(AbsListView.java:2165) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) at android.widget.FrameLayout.onLayout(FrameLayout.java:261) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) at android.widget.FrameLayout.onLayout(FrameLayout.java:261) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1775) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656) at android.widget.LinearLayout.onLayout(LinearLayout.java:1565) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1231) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) at android.widget.FrameLayout.onLayout(FrameLayout.java:261) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) at android.widget.FrameLayout.onLayout(FrameLayout.java:261) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) at android.widget.FrameLayout.onLayout(FrameLayout.java:261) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656) at android.widget.LinearLayout.onLayout(LinearLayout.java:1565) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) at android.widget.FrameLayout.onLayout(FrameLayout.java:261) at com.android.internal.policy.DecorView.onLayout(DecorView.java:753) at android.view.View.layout(View.java:20672) at android.view.ViewGroup.layout(ViewGroup.java:6194) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2792) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2319) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1460) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7183) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949) at android.view.Choreographer.doCallbacks(Choreographer.java:761) at android.view.Choreographer.doFrame(Choreographer.java:696) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) 2018-12-18 11:51:37.314 14256-14256/com.github.catfriend1.syncthingandroid.debug E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)