From 5e23c5ec636c990bcc2013f83f14c346695158d9 Mon Sep 17 00:00:00 2001
From: Gyurme <gyurme+git@gmail.com>
Date: Wed, 30 May 2018 20:23:23 +1200
Subject: [PATCH] Added a method that allows you to fetch the list of supported
 UUIDs that can be used to connect to a device. Useful for connecting to
 devices that may not support the standard UUIDs.

---
 .../ivbaranov/rxbluetooth/RxBluetooth.java    | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/RxBluetooth.java b/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/RxBluetooth.java
index 4c617a8..aee9f4a 100644
--- a/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/RxBluetooth.java
+++ b/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/RxBluetooth.java
@@ -26,6 +26,9 @@
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.Build;
+import android.os.Parcelable;
+import android.os.RemoteException;
+import android.support.annotation.RequiresApi;
 import android.text.TextUtils;
 import com.github.ivbaranov.rxbluetooth.events.AclEvent;
 import com.github.ivbaranov.rxbluetooth.events.BondStateEvent;
@@ -574,4 +577,46 @@ public Observable<AclEvent> observeAclEvent() {
       }
     });
   }
+
+    /**
+     * Performs a service discovery and fetches a list of UUIDs that can be used to connect to {@link BluetoothDevice}
+     *
+     * @param bluetoothDevice bluetooth device to connect
+     * @return RxJava Observable with an array of Device UUIDs that can be used to connect to the device
+     */
+
+  @RequiresApi(api = Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)
+  public Observable<Parcelable[]> observeFetchDeviceUuids(final BluetoothDevice bluetoothDevice) {
+    final IntentFilter filter = new IntentFilter();
+    filter.addAction(BluetoothDevice.ACTION_UUID);
+
+    return Observable.defer(new Callable<ObservableSource<Parcelable[]>>() {
+      @Override public ObservableSource<Parcelable[]> call() {
+        return Observable.create(new ObservableOnSubscribe<Parcelable[]>() {
+          @Override
+          public void subscribe(@NonNull final ObservableEmitter<Parcelable[]> emitter) {
+            final BroadcastReceiver receiver = new BroadcastReceiver() {
+              @Override public void onReceive(Context context, Intent intent) {
+                      Parcelable[] uuids = intent.getParcelableArrayExtra(BluetoothDevice.EXTRA_UUID);
+                      emitter.onNext(uuids);
+                  }
+            };
+
+            context.registerReceiver(receiver, filter);
+
+            emitter.setDisposable(new MainThreadDisposable() {
+                @Override
+                protected void onDispose() {
+                    context.unregisterReceiver(receiver);
+                    dispose();
+                }
+            });
+
+            bluetoothDevice.fetchUuidsWithSdp();
+
+          }
+        });
+      }
+    });
+  }
 }