Bluetooth: add getDiscoveryEndMillis() call

Method to tell when the adapter finished (or will finish) being in
discovery mode.

Test: compiles and still can scan
Bug: 34395439
Change-Id: I41b48c2b934c0a1d5e1727cec08f3f762e3cb309

3 files changed, 24 insertions, 0 deletions

diff --git a/core/java/android/bluetooth/BluetoothAdapter.java b/core/java/android/bluetooth/BluetoothAdapter.java
index f9be3a1d7f0b..9302cbc480e1 100644
--- a/core/java/android/bluetooth/BluetoothAdapter.java
+++ b/core/java/android/bluetooth/BluetoothAdapter.java
@@ -1184,6 +1184,25 @@ public final class BluetoothAdapter {
     }
 
     /**
+     * Get the end time of the latest remote device discovery process.
+     * @return the latest time that the bluetooth adapter was/will be in discovery mode,
+     * in milliseconds since the epoch.
+     * This time can be in the future if {@link #startDiscovery()} has been called recently.
+     * @hide
+     */
+    public long getDiscoveryEndMillis() {
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null) return mService.getDiscoveryEndMillis();
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+        return -1;
+    }
+
+    /**
      * Start the remote device discovery process.
      * <p>The discovery process usually involves an inquiry scan of about 12
      * seconds, followed by a page scan of each new device to retrieve its
diff --git a/core/java/android/bluetooth/IBluetooth.aidl b/core/java/android/bluetooth/IBluetooth.aidl
index 7c5458b7704b..53fef2add344 100644
--- a/core/java/android/bluetooth/IBluetooth.aidl
+++ b/core/java/android/bluetooth/IBluetooth.aidl
@@ -52,6 +52,7 @@ interface IBluetooth
     boolean startDiscovery();
     boolean cancelDiscovery();
     boolean isDiscovering();
+    long getDiscoveryEndMillis();
 
     int getAdapterConnectionState();
     int getProfileConnectionState(int profile);
diff --git a/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothAdapter.java b/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothAdapter.java
index 26836099c9de..c4437c220c5c 100755
--- a/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothAdapter.java
+++ b/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothAdapter.java
@@ -135,6 +135,10 @@ public final class LocalBluetoothAdapter {
         mAdapter.setDiscoverableTimeout(timeout);
     }
 
+    public long getDiscoveryEndMillis() {
+        return mAdapter.getDiscoveryEndMillis();
+    }
+
     public void setName(String name) {
         mAdapter.setName(name);
     }