Display options menu only once web gui is online.

src/main/java/com/nutomic/syncthingandroid/WebGuiActivity.java

@@ -114,6 +114,11 @@ public class WebGuiActivity extends Activity implements SyncthingService.OnWebGu
 		return true;
 	}
 
+	@Override
+	public boolean onPrepareOptionsMenu(Menu menu) {
+		return mSyncthingService != null && mSyncthingService.isWebGuiAvailable();
+	}
+
 	@Override
 	public boolean onOptionsItemSelected(MenuItem item) {
 		switch (item.getItemId()) {

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

@@ -12,14 +12,11 @@ public class RestApi implements SyncthingService.OnWebGuiAvailableListener {
 
 	private static final String TAG = "RestApi";
 
-	private Context mContext;
-
 	private String mVersion;
 
 	private String mUrl;
 
-	public RestApi(Context context, String url) {
-		mContext = context;
+	public RestApi(String url) {
 		mUrl = url;
 	}
 
@@ -45,9 +42,7 @@ public class RestApi implements SyncthingService.OnWebGuiAvailableListener {
 	 * Returns the version name, or a (text) error message on failure.
 	 */
 	public String getVersion() {
-		return (mVersion != null)
-				? mVersion
-				: mContext.getString(R.string.syncthing_version_error);
+		return mVersion;
 	}
 
 	/**

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

@@ -259,7 +259,7 @@ public class SyncthingService extends Service {
 					throw new RuntimeException("Failed to read gui url, aborting", e);
 				}
 				finally {
-					mApi = new RestApi(SyncthingService.this, "http://" + syncthingUrl);
+					mApi = new RestApi("http://" + syncthingUrl);
 					Log.i(TAG, "Web GUI will be available at " + mApi.getUrl());
 					registerOnWebGuiAvailableListener(mApi);
 				}
@@ -284,6 +284,10 @@ public class SyncthingService extends Service {
 		mApi.shutdown();
 	}
 
+	public boolean isWebGuiAvailable() {
+		return mIsWebGuiAvailable;
+	}
+
 	/**
 	 * Register a listener for the web gui becoming available..
 	 *

src/main/res/values/strings.xml

@@ -40,7 +40,4 @@ Please report any problems you encounter.
 	<!-- Title of the preference showing upstream version name -->
 	<string name="syncthing_version_title">Syncthing Version</string>
 
-	<!-- Displayed instead of the version string if it could not be read -->
-	<string name="syncthing_version_error">Could not read version</string>
-
 </resources>