Immediately update GUI after config was changed (fixes #355).

src/main/java/com/nutomic/syncthingandroid/fragments/DeviceFragment.java

@@ -266,6 +266,7 @@ public class DeviceFragment extends Fragment implements
 
         if (!mIsCreateMode) {
             List<RestApi.Device> devices = mSyncthingService.getApi().getDevices(false);
+            mDevice = null;
             for (int i = 0; i < devices.size(); i++) {
                 if (devices.get(i).deviceID.equals(
                         getActivity().getIntent().getStringExtra(EXTRA_NODE_ID))) {
@@ -274,7 +275,7 @@ public class DeviceFragment extends Fragment implements
                 }
             }
             if (mDevice == null) {
-                Log.w(TAG, "Device not found in API update");
+                Log.w(TAG, "Device not found in API update, maybe it was deleted?");
                 getActivity().finish();
                 return;
             }

src/main/java/com/nutomic/syncthingandroid/fragments/FolderFragment.java

@@ -234,6 +234,7 @@ public class FolderFragment extends Fragment
         if (!mIsCreateMode) {
             List<RestApi.Folder> folders = mSyncthingService.getApi().getFolders();
             String passedId = getActivity().getIntent().getStringExtra(EXTRA_REPO_ID);
+            mFolder = null;
             for (RestApi.Folder currentFolder : folders) {
                 if (currentFolder.id.equals(passedId)) {
                     mFolder = currentFolder;
@@ -241,7 +242,7 @@ public class FolderFragment extends Fragment
                 }
             }
             if (mFolder == null) {
-                Log.w(TAG, "Folder not found in API update");
+                Log.w(TAG, "Folder not found in API update, maybe it was deleted?");
                 getActivity().finish();
                 return;
             }

src/main/java/com/nutomic/syncthingandroid/syncthing/RestApi.java

@@ -136,6 +136,10 @@ public class RestApi implements SyncthingService.OnWebGuiAvailableListener,
         public String invalid;
     }
 
+    public interface OnConfigChangedListener {
+        void onConfigChanged();
+    }
+
     private final Context mContext;
 
     private String mVersion;
@@ -179,14 +183,15 @@ public class RestApi implements SyncthingService.OnWebGuiAvailableListener,
     private final Map<String, String> mCacheFolderPathLookup = new HashMap<String, String>();
 
     public RestApi(Context context, String url, String apiKey, String guiUser, String guiPassword,
-                   OnApiAvailableListener listener) {
+                   OnApiAvailableListener apiListener, OnConfigChangedListener configListener) {
         mContext = context;
         mUrl = url;
         mApiKey = apiKey;
         mGuiUser = guiUser;
         mGuiPassword = guiPassword;
         mHttpsCertPath = mContext.getFilesDir() + "/" + SyncthingService.HTTPS_CERT_FILE;
-        mOnApiAvailableListener = listener;
+        mOnApiAvailableListener = apiListener;
+        mOnConfigChangedListener = configListener;
     }
 
     /**
@@ -205,6 +210,8 @@ public class RestApi implements SyncthingService.OnWebGuiAvailableListener,
 
     private final OnApiAvailableListener mOnApiAvailableListener;
 
+    private final OnConfigChangedListener mOnConfigChangedListener;
+
     /**
      * Gets local device ID, syncthing version and config, then calls all OnApiAvailableListeners.
      */
@@ -348,6 +355,7 @@ public class RestApi implements SyncthingService.OnWebGuiAvailableListener,
         } else {
             activity.startActivity(new Intent(mContext, RestartActivity.class));
         }
+        mOnConfigChangedListener.onConfigChanged();
     }
 
     /**

src/main/java/com/nutomic/syncthingandroid/syncthing/SyncthingService.java

@@ -401,6 +401,11 @@ public class SyncthingService extends Service implements
                         }
                     }).start();
                 }
+            }, new RestApi.OnConfigChangedListener() {
+                @Override
+                public void onConfigChanged() {
+                    onApiChange();
+                }
             });
 
             mEventProcessor = new EventProcessor(SyncthingService.this, mApi);