add description to control service

3 files changed, 8 insertions, 3 deletions

diff --git a/app/src/main/java/com/javispedro/vndroid/ServerService.java b/app/src/main/java/com/javispedro/vndroid/ServerService.java
index 96420df..b39f175 100644
--- a/app/src/main/java/com/javispedro/vndroid/ServerService.java
+++ b/app/src/main/java/com/javispedro/vndroid/ServerService.java
@@ -218,6 +218,7 @@ public class ServerService extends Service {
     private class ScreenGrabberCallback implements ScreenGrabber.Callback {
         @Override
         public void onImage(Image image) {
+            if (image == null) return;
             if (rfbServer != null) {
                 rfbServer.putImage(image);
             } else {
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index bf12595..51d394a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,6 +1,10 @@
 <resources>
     <string name="app_name">Vndroid</string>
 
+    <string name="control_service_summary">Vndroid control service</string>
+    <string name="control_service_description">Vndroid requires this accessibility service in order to allow VNC clients control of the device (touchscreen, keyboard).
+        If the service is disabled, clients will be able to see the screen, but will not be able to interact with it. </string>
+
     <string name="server_running_notification_channel">Server status</string>
     <string name="server_running_notification_title">Server active</string>
 
diff --git a/app/src/main/res/xml/controlservice.xml b/app/src/main/res/xml/controlservice.xml
index 29a16b7..85078a7 100644
--- a/app/src/main/res/xml/controlservice.xml
+++ b/app/src/main/res/xml/controlservice.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
     android:canRetrieveWindowContent="true"
-    android:canPerformGestures="true">
-
-</accessibility-service>
\ No newline at end of file
+    android:canPerformGestures="true"
+    android:summary="@string/control_service_summary"
+    android:description="@string/control_service_description"/>
\ No newline at end of file