How to access local host from android device using google app engine?

Question

I am using Android Studio and trying to access local host from android device using google app engine.I followed this link.Now what they have shown it is nicely working with genymotion.Now when i tried with android device it didn't work.I read this post and give this in my run configuration, in VM Args as

--address=0.0.0.0
But when i tried to run the backend server it gives me some error.

Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Unrecognized option: --address=0.0.0.0

Now i have my SignUp class where i am communicating with server.

public class SignUp_Endpoint_Communicator extends AsyncTask <Pair<Context, UserinfoModel>, Void, ResponseMessages> {
    private Context maincontext;
    private UserinfoModelApi userinfo_api;
    private UserinfoModel userdata;
    private manipulate_Signup ms;
    @Override
    protected ResponseMessages doInBackground(Pair<Context, UserinfoModel>... params) {
        if(userinfo_api == null) {  // Only do this once
            UserinfoModelApi.Builder builder = new UserinfoModelApi.Builder(AndroidHttp.newCompatibleTransport(),
                    new AndroidJsonFactory(), null)
                    // options for running against local devappserver
                    // - 10.0.2.2 is localhost's IP address in Android emulator
                    // - turn off compression when running against local devappserver
                    //.setRootUrl("http://10.0.2.2:8080/_ah/api/")
                    .setRootUrl("http://0.0.0.0:8080/_ah/api/")
                    .setGoogleClientRequestInitializer(new GoogleClientRequestInitializer() {
                        @Override
                        public void initialize(AbstractGoogleClientRequest<?> abstractGoogleClientRequest) throws IOException {
                            abstractGoogleClientRequest.setDisableGZipContent(true);
                        }
                    });
            // end options for devappserver

            userinfo_api = builder.build();
        }
        maincontext = params[0].first;
        userdata = params[0].second;

        try {
            ResponseMessages response = new ResponseMessages();
            response = userinfo_api.setUserInfo(userdata).execute();
            return response;
        }
        catch (IOException e)
        {
            e.printStackTrace();
            return null;
        }
    }

    protected void onPostExecute(ResponseMessages response){
        ms = (manipulate_Signup) ((Activity) maincontext);
        ms.setResponseMessage(response);
    }

    public interface manipulate_Signup{
        public void setResponseMessage(ResponseMessages response);
    }
}

Is there any other thing i have to change to work it for android device??

Answer 1

I got this working in Android Studio by doing the following:

1. When creating your Builder, replace the default '10.0.2.2' IP address for the 'rootUrl' with your local IP address (mine is 192.168.1.222 below).

E.g:

MyApi.Builder builder = new MyApi.Builder(AndroidHttp.newCompatibleTransport(),
                    new AndroidJsonFactory(), null)
                    // options for running against local devappserver
                    // - 10.0.2.2 is localhost's IP address in Android emulator
                    // - 192.168.1.222 is my machine's IP address on my local network.
                    // - turn off compression when running against local devappserver
                    .setRootUrl("http://192.168.1.222:8080/_ah/api/")
                    .setGoogleClientRequestInitializer(new GoogleClientRequestInitializer() {
                        @Override
                        public void initialize(AbstractGoogleClientRequest<?> abstractGoogleClientRequest) throws IOException {
                            abstractGoogleClientRequest.setDisableGZipContent(true);
                        }
                    });

2. Edit the Run Configuration for your Appengine backend module:

   • Run->Edit Configurations, select your AppEngine configuration.
   • Uncheck 'Synchronize with build.gradle configuration'.
   • Change the 'Server Address' to 0.0.0.0

3. Re-run your Appengine module.

I went round the houses a bit trying to get this to work, so I hope it saves someone else some time. Google's docs on this don't seem to make this obvious.

Answer 2

I worked on it .In android studio at first go to Run->Edit Configuration->backend->VM Args and then paste the code of where my local datatstore bin presents

-Ddatastore.backing_store=E:\datastore\local_db.bin

and the IP address for android device is the ipaddress of your wifi.

Answer 3

You should be using 10.0.2.2 for localhost.. Maybe this link can help.. https://developer.android.com/tools/devices/emulator.html#networkaddresses