LE: Add API to configure MTU for a given connection (3/4)

bug:13571470
Change-Id: I3619617eaf864701a35f7802bc71805784d768d0

1 files changed, 47 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothGatt.java b/framework/java/android/bluetooth/BluetoothGatt.java
index ae6ad3b4f2..bbd0439e51 100644
--- a/framework/java/android/bluetooth/BluetoothGatt.java
+++ b/framework/java/android/bluetooth/BluetoothGatt.java
@@ -561,6 +561,23 @@ public final class BluetoothGatt implements BluetoothProfile {
             public void onAdvertiseStateChange(int state, int status) {
                 if (DBG) Log.d(TAG, "onAdvertiseStateChange() - state = "
                         + state + " status=" + status);
+	    }
+
+            /**
+             * Callback invoked when the MTU for a given connection changes
+             * @hide
+             */
+            public void onConfigureMTU(String address, int mtu, int status) {
+                if (DBG) Log.d(TAG, "onConfigureMTU() - Device=" + address +
+                            " mtu=" + mtu + " status=" + status);
+                if (!address.equals(mDevice.getAddress())) {
+                    return;
+                }
+                try {
+                    mCallback.onConfigureMTU(BluetoothGatt.this, mtu, status);
+                } catch (Exception ex) {
+                    Log.w(TAG, "Unhandled exception in callback", ex);
+                }
             }
         };
 
@@ -1148,6 +1165,36 @@ public final class BluetoothGatt implements BluetoothProfile {
     }
 
     /**
+     * Configure the MTU used for a given connection.
+     *
+     * <p>When performing a write request operation (write without response),
+     * the data sent is truncated to the MTU size. This function may be used
+     * to request a larget MTU size to be able to send more data at once.
+     *
+     * <p>A {@link BluetoothGattCallback#onConfigureMTU} callback will indicate
+     * whether this operation was successful.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission.
+     *
+     * @return true, if the new MTU value has been requested successfully
+     * @hide
+     */
+    public boolean configureMTU(int mtu) {
+        if (DBG) Log.d(TAG, "configureMTU() - device: " + mDevice.getAddress()
+                            + " mtu: " + mtu);
+        if (mService == null || mClientIf == 0) return false;
+
+        try {
+            mService.configureMTU(mClientIf, mDevice.getAddress(), mtu);
+        } catch (RemoteException e) {
+            Log.e(TAG,"",e);
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
      * Not supported - please use {@link BluetoothManager#getConnectedDevices(int)}
      * with {@link BluetoothProfile#GATT} as argument
      *