Add Bluetooth metadata listenr

If it is updated, we need to refresh UI to display latest information

Fixes: 124455912
Test: RunSettingsRoboTests
Change-Id: I73b03f4931e3c2b0d367bbd2d3b2057b26c84b59

src/com/android/settings/bluetooth/AdvancedBluetoothDetailsHeaderController.java

@@ -16,6 +16,7 @@
 
 package com.android.settings.bluetooth;
 
+import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.graphics.Bitmap;
@@ -23,6 +24,8 @@ import android.graphics.PorterDuff;
 import android.graphics.PorterDuffColorFilter;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
+import android.os.Handler;
+import android.os.Looper;
 import android.provider.MediaStore;
 import android.util.Log;
 import android.view.View;
@@ -59,9 +62,25 @@ public class AdvancedBluetoothDetailsHeaderController extends BasePreferenceCont
     @VisibleForTesting
     final Map<String, Bitmap> mIconCache;
     private CachedBluetoothDevice mCachedDevice;
+    @VisibleForTesting
+    BluetoothAdapter mBluetoothAdapter;
+    @VisibleForTesting
+    Handler mHandler = new Handler(Looper.getMainLooper());
+    @VisibleForTesting
+    final BluetoothAdapter.MetadataListener mMetadataListener =
+            new BluetoothAdapter.MetadataListener() {
+                @Override
+                public void onMetadataChanged(BluetoothDevice device, int key, String value) {
+                    super.onMetadataChanged(device, key, value);
+                    Log.i(TAG, String.format("Metadata updated in Device %s: %d = %s.", device, key,
+                            value));
+                    refresh();
+                }
+            };
 
     public AdvancedBluetoothDetailsHeaderController(Context context, String prefKey) {
         super(context, prefKey);
+        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
         mIconCache = new HashMap<>();
     }
 
@@ -84,11 +103,14 @@ public class AdvancedBluetoothDetailsHeaderController extends BasePreferenceCont
     @Override
     public void onStart() {
         mCachedDevice.registerCallback(this::onDeviceAttributesChanged);
+        mBluetoothAdapter.registerMetadataListener(mCachedDevice.getDevice(), mMetadataListener,
+                mHandler);
     }
 
     @Override
     public void onStop() {
         mCachedDevice.unregisterCallback(this::onDeviceAttributesChanged);
+        mBluetoothAdapter.unregisterMetadataListener(mCachedDevice.getDevice());
 
         // Destroy icon bitmap associated with this header
         for (Bitmap bitmap : mIconCache.values()) {

tests/robotests/src/com/android/settings/bluetooth/AdvancedBluetoothDetailsHeaderControllerTest.java

@@ -21,6 +21,7 @@ import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.graphics.Bitmap;
@@ -65,6 +66,8 @@ public class AdvancedBluetoothDetailsHeaderControllerTest{
     private ImageView mImageView;
     @Mock
     private CachedBluetoothDevice mCachedDevice;
+    @Mock
+    private BluetoothAdapter mBluetoothAdapter;
     private AdvancedBluetoothDetailsHeaderController mController;
     private LayoutPreference mLayoutPreference;
 
@@ -78,6 +81,7 @@ public class AdvancedBluetoothDetailsHeaderControllerTest{
         mLayoutPreference = new LayoutPreference(mContext,
                 LayoutInflater.from(mContext).inflate(R.layout.advanced_bt_entity_header, null));
         mController.mLayoutPreference = mLayoutPreference;
+        mController.mBluetoothAdapter = mBluetoothAdapter;
         when(mCachedDevice.getDevice()).thenReturn(mBluetoothDevice);
     }
 
@@ -159,6 +163,21 @@ public class AdvancedBluetoothDetailsHeaderControllerTest{
         verify(mImageView).setImageBitmap(mBitmap);
     }
 
+    @Test
+    public void onStart_registerCallback() {
+        mController.onStart();
+
+        verify(mBluetoothAdapter).registerMetadataListener(mBluetoothDevice,
+                mController.mMetadataListener, mController.mHandler);
+    }
+
+    @Test
+    public void onStop_unregisterCallback() {
+        mController.onStop();
+
+        verify(mBluetoothAdapter).unregisterMetadataListener(mBluetoothDevice);
+    }
+
     private void assertBatteryLevel(LinearLayout linearLayout, int batteryLevel) {
         final TextView textView = linearLayout.findViewById(R.id.bt_battery_summary);
         assertThat(textView.getText().toString()).isEqualTo(