--------- beginning of crash
2018-10-06 08:46:54.116 17107-17107/com.example.android.xxxx E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.android.xxxx, PID: 17107
    android.os.NetworkOnMainThreadException
        at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1513)
        at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:117)
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:105)
        at java.net.InetAddress.getAllByName(InetAddress.java:1154)
        at com.android.okhttp.Dns$1.lookup(Dns.java:39)
        at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:175)
        at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:141)
        at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:83)
        at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:174)
        at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:126)
        at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:95)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:281)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:224)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:461)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:407)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseMessage(HttpURLConnectionImpl.java:534)
        at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getResponseMessage(DelegatingHttpsURLConnection.java:109)
        at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getResponseMessage(HttpsURLConnectionImpl.java:26)
        at com.amazonaws.http.UrlHttpClient.createHttpResponse(UrlHttpClient.java:92)
        at com.amazonaws.http.UrlHttpClient.execute(UrlHttpClient.java:85)
        at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:371)
        at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:212)
        at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4659)
        at com.amazonaws.services.s3.AmazonS3Client.getBucketRegionViaHeadRequest(AmazonS3Client.java:5430)
        at com.amazonaws.services.s3.AmazonS3Client.fetchRegionFromCache(AmazonS3Client.java:5405)
        at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4650)
        at com.amazonaws.services.s3.AmazonS3Client.deleteObject(AmazonS3Client.java:2129)
        at com.amazonaws.services.s3.AmazonS3Client.deleteObject(AmazonS3Client.java:2107)
        at com.example.android.rmitwallet.ImageFileAdapter.onMenuItemClick(ImageFileAdapter.java:179)
        at android.support.v7.widget.PopupMenu$1.onMenuItemSelected(PopupMenu.java:112)
        at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822)
        at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:171)
        at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:973)
        at android.support.v7.view.menu.MenuPopup.onItemClick(MenuPopup.java:127)
        at android.widget.AdapterView.performItemClick(AdapterView.java:318)
        at android.widget.AbsListView.performItemClick(AbsListView.java:1159)
        at android.widget.AbsListView$PerformClick.run(AbsListView.java:3136)
        at android.widget.AbsListView$3.run(AbsListView.java:4052)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)