How to check permissions?

Questions about Thunkable Feature Requests
1

How can I check if the application has camera or location permissions? I am trying to do something like this (just an example):

If permission for camera is granted change text input to value “Granted”. If not change text input value to “Not granted”. I need to check it without taking a picture by camera (call Camera1’s take photo).

I found similar topic here ( https://community.thunkable.com/t/how-do-you-use-screen1-permissions-granted-permissions-denied/65247 ) but I don’t have these option on my Screen1 object and got no idea where to find these parameters/variables to use it with if-else statement.
I also tried do check it from WebView component with javascript (navigator.permissions.query) but it seems it is not supported solutions.

As for now… I don’t know how to check if permissions was granted or not and got no idea how to do this with Thunkable.

2

This is not possible,
Thunkable Doesn’t support such a block.

1 Like
3

Ok, I found workaround for that, which I decided to share here, because maybe it will be helpful for others having the same problem. The solution is combination of javascript and post/receive message method. .

FOR CAMERA:
This will ask for permission if it was not given before, but will not open the Camera as with “Camera1’s take photo” so it looks better.

  1. I am executing javascript inside WebViewer component, which looks like this:
navigator.getUserMedia (
   {
   video: true
   },
   function(localMediaStream) {
      ThunkableWebviewerExtension.postMessage("camera-Granted");
   },
   function(err) {
      if(err.includes("denied")) {
         ThunkableWebviewerExtension.postMessage("camera-Denied");
      }
      else {
         ThunkableWebviewerExtension.postMessage("camera-Error");
      }
   }
);
  1. I am receiving postMessage with WebViewer ReceiveMessage (if message = “camera-Granted” etc.) and inside if rule I can add any action, not only inside WebViewer component but like every event I can do normally with blocks in Thunkable.

FOR LOCATION:
If it will throw error or latitude and logitude are null, I can assume that the permission is denied (so here no rocket scince really).

FOR MICROPHONE:
The same way as for camera but “video” will be “audio”.

After all of that:
Obviously it will be much more simple if Thunkable will add a feature or anything to allow to check permissions with blocks…or if Android Browser will start to support “Navigator API: permissions” for javascript.
Anyway… I recommend in future to add to Thunkable a feature allowing to check/ permission status from the blocks area. It will be much more comfortable to use it.

4 Likes
4

Have you tried it on iOS?

I’ve made some tests and it works fine on Android but on iOS no permission popup comes out.

Thanks
D