Add a way to query for supported Bluetooth profiles.

Currently there is no way to get the profiles supported by the Bluetooth
adapter. Asking for a profile proxy of an unsupported profile does not
fail and can lead to code indefinitely waiting for the proxy response. This
new code will allow for checking the supported profiles before asking for
the proxies.

Bug: 26451648
Change-Id: I4b48e7151f5ca53851aa3b967c143fae140ecd34
(cherry picked from commit b1301fa2849bafd6daa422281dc5200863bc761e)

1 files changed, 30 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothAdapter.java b/framework/java/android/bluetooth/BluetoothAdapter.java
index b57a4e07bf..59edadce96 100644
--- a/framework/java/android/bluetooth/BluetoothAdapter.java
+++ b/framework/java/android/bluetooth/BluetoothAdapter.java
@@ -1513,6 +1513,36 @@ public final class BluetoothAdapter {
     }
 
     /**
+     * Gets the currently supported profiles by the adapter.
+     *
+     *<p> This can be used to check whether a profile is supported before attempting
+     * to connect to its respective proxy.
+     *
+     * @return a list of integers indicating the ids of supported profiles as defined in
+     * {@link BluetoothProfile}.
+     * @hide
+     */
+    public List<Integer> getSupportedProfiles() {
+        final ArrayList<Integer> supportedProfiles = new ArrayList<Integer>();
+
+        try {
+            synchronized (mManagerCallback) {
+                if (mService != null) {
+                    final long supportedProfilesBitMask = mService.getSupportedProfiles();
+
+                    for (int i = 0; i <= BluetoothProfile.MAX_PROFILE_ID; i++) {
+                        if ((supportedProfilesBitMask & (1 << i)) != 0) {
+                            supportedProfiles.add(i);
+                        }
+                    }
+                }
+            }
+        } catch (RemoteException e) {Log.e(TAG, "getSupportedProfiles:", e);}
+
+        return supportedProfiles;
+    }
+
+    /**
      * Get the current connection state of the local Bluetooth adapter.
      * This can be used to check whether the local Bluetooth adapter is connected
      * to any profile of any other remote Bluetooth Device.