Add Api to get profile connection state.

This gets the current connection state of the profile with respect
to the local Bluetooth adapter.

Change-Id: I7cff6c9201d29a8b45413cff7384b7483f21bd5c

1 files changed, 25 insertions, 0 deletions

diff --git a/core/java/android/bluetooth/BluetoothAdapter.java b/core/java/android/bluetooth/BluetoothAdapter.java
index 28bc424..264db19 100644
--- a/core/java/android/bluetooth/BluetoothAdapter.java
+++ b/core/java/android/bluetooth/BluetoothAdapter.java
@@ -774,6 +774,31 @@ public final class BluetoothAdapter {
     }
 
     /**
+     * Get the current connection state of a profile.
+     * This function can be used to check whether the local Bluetooth adapter
+     * is connected to any remote device for a specific profile.
+     * Profile can be one of {@link BluetoothProfile.HEADSET},
+     * {@link BluetoothProfile.A2DP}.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH}.
+     *
+     * <p> Return value can be one of
+     * {@link * BluetoothProfile.STATE_DISCONNECTED},
+     * {@link * BluetoothProfile.STATE_CONNECTING},
+     * {@link * BluetoothProfile.STATE_CONNECTED},
+     * {@link * BluetoothProfile.STATE_DISCONNECTING}
+     * @hide
+     */
+    public int getProfileConnectionState(int profile) {
+        if (getState() != STATE_ON) return BluetoothProfile.STATE_DISCONNECTED;
+        try {
+            return mService.getProfileConnectionState(profile);
+        } catch (RemoteException e) {Log.e(TAG, "getProfileConnectionState:", e);}
+        return BluetoothProfile.STATE_DISCONNECTED;
+    }
+
+    /**
+    /**
      * Picks RFCOMM channels until none are left.
      * Avoids reserved channels.
      */