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

3 files changed, 33 insertions, 1 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.
      */
diff --git a/core/java/android/bluetooth/BluetoothProfile.java b/core/java/android/bluetooth/BluetoothProfile.java
index 6cd81fd..58b3868 100644
--- a/core/java/android/bluetooth/BluetoothProfile.java
+++ b/core/java/android/bluetooth/BluetoothProfile.java
@@ -83,6 +83,12 @@ public interface BluetoothProfile {
     public static final int PAN = 5;
 
     /**
+     * PBAP
+     * @hide
+     */
+    public static final int PBAP = 6;
+
+    /**
      * Default priority for devices that we try to auto-connect to and
      * and allow incoming connections for the profile
      * @hide
diff --git a/core/java/android/bluetooth/IBluetooth.aidl b/core/java/android/bluetooth/IBluetooth.aidl
index 48dfed8..d4e7f7d 100644
--- a/core/java/android/bluetooth/IBluetooth.aidl
+++ b/core/java/android/bluetooth/IBluetooth.aidl
@@ -53,6 +53,7 @@ interface IBluetooth
     byte[] readOutOfBandData();
 
     int getAdapterConnectionState();
+    int getProfileConnectionState(int profile);
     boolean changeApplicationBluetoothState(boolean on,
                                 in IBluetoothStateChangeCallback callback, in
                                 IBinder b);
@@ -121,5 +122,5 @@ interface IBluetooth
     List<BluetoothDevice> getHealthDevicesMatchingConnectionStates(in int[] states);
     int getHealthDeviceConnectionState(in BluetoothDevice device);
 
-    void sendConnectionStateChange(in BluetoothDevice device, int state, int prevState);
+    void sendConnectionStateChange(in BluetoothDevice device, int profile, int state, int prevState);
 }