From 762a05f0574529fc768bd433128f636e9bc47f0c Mon Sep 17 00:00:00 2001
From: HsingYuan Lo <hylo@google.com>
Date: Wed, 23 Sep 2020 17:43:38 +0800
Subject: [PATCH] Expose service changed event to application (2/3)

Handle service changed event from GattService

Bug: 154056389
Tag: #feature
Test: test service changed scenario
Change-Id: If56dcbd7cf17b23c88cceb9c67c5d75b21320965
---
 .../java/android/bluetooth/BluetoothGatt.java | 25 +++++++++++++++++++
 .../bluetooth/BluetoothGattCallback.java      | 13 ++++++++++
 2 files changed, 38 insertions(+)

diff --git a/core/java/android/bluetooth/BluetoothGatt.java b/core/java/android/bluetooth/BluetoothGatt.java
index c58b5d218e747..6d22eb93fd02b 100644
--- a/core/java/android/bluetooth/BluetoothGatt.java
+++ b/core/java/android/bluetooth/BluetoothGatt.java
@@ -688,6 +688,31 @@ public final class BluetoothGatt implements BluetoothProfile {
                         }
                     });
                 }
+
+                /**
+                 * Callback invoked when service changed event is received
+                 * @hide
+                 */
+                @Override
+                public void onServiceChanged(String address) {
+                    if (DBG) {
+                        Log.d(TAG, "onServiceChanged() - Device=" + address);
+                    }
+
+                    if (!address.equals(mDevice.getAddress())) {
+                        return;
+                    }
+
+                    runOrQueueCallback(new Runnable() {
+                        @Override
+                        public void run() {
+                            final BluetoothGattCallback callback = mCallback;
+                            if (callback != null) {
+                                callback.onServiceChanged(BluetoothGatt.this);
+                            }
+                        }
+                    });
+                }
             };
 
     /*package*/ BluetoothGatt(IBluetoothGatt iGatt, BluetoothDevice device,
diff --git a/core/java/android/bluetooth/BluetoothGattCallback.java b/core/java/android/bluetooth/BluetoothGattCallback.java
index f718c0b57c1b8..9f6b8287e791c 100644
--- a/core/java/android/bluetooth/BluetoothGattCallback.java
+++ b/core/java/android/bluetooth/BluetoothGattCallback.java
@@ -194,4 +194,17 @@ public abstract class BluetoothGattCallback {
     public void onConnectionUpdated(BluetoothGatt gatt, int interval, int latency, int timeout,
             int status) {
     }
+
+    /**
+     * Callback indicating service changed event is received
+     *
+     * <p>Receiving this event means that the GATT database is out of sync with
+     * the remote device. {@link BluetoothGatt#discoverServices} should be
+     * called to re-discover the services.
+     *
+     * @param gatt GATT client involved
+     * @hide
+     */
+    public void onServiceChanged(BluetoothGatt gatt) {
+    }
 }