Show connecting hearing devices in A11y hearing devices page

We only show connected hearing devices in the hearing devices page now.
When user pairing a device from pairing page and back to the hearing
devices page after the device is bonded, it's confusing no device shown
in the list because the device is still connecting to profiles. We
should show the connecting device to avoid confusion.

Bug: 283268686
Test: make RunSettingsRoboTests ROBOTEST_FILTER=DeviceListPreferenceFragmentTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AvailableHearingDeviceUpdaterTest
Change-Id: Id3b29c12b80c282736a3e6ca73bcf317e0652b89

src/com/android/settings/accessibility/AvailableHearingDeviceUpdater.java

@@ -16,7 +16,6 @@
 
 package com.android.settings.accessibility;
 
-import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 
 import com.android.settings.bluetooth.AvailableMediaBluetoothDeviceUpdater;
@@ -37,11 +36,9 @@ public class AvailableHearingDeviceUpdater extends AvailableMediaBluetoothDevice
 
     @Override
     public boolean isFilterMatched(CachedBluetoothDevice cachedDevice) {
-        final BluetoothDevice device = cachedDevice.getDevice();
-        final boolean isConnectedHearingAidDevice = (cachedDevice.isConnectedHearingAidDevice()
-                && (device.getBondState() == BluetoothDevice.BOND_BONDED));
-
-        return isConnectedHearingAidDevice && isDeviceInCachedDevicesList(cachedDevice);
+        return cachedDevice.isHearingAidDevice()
+                && isDeviceConnected(cachedDevice)
+                && isDeviceInCachedDevicesList(cachedDevice);
     }
 
     @Override

src/com/android/settings/bluetooth/DeviceListPreferenceFragment.kt

@@ -191,10 +191,11 @@ abstract class DeviceListPreferenceFragment(restrictedKey: String?) :
 
     private suspend fun addDevice(cachedDevice: CachedBluetoothDevice) =
         withContext(Dispatchers.Default) {
+            // TODO(b/289189853): Replace checking if `filter` is null or not to decide which type
+            // of Bluetooth scanning method will be used
+            val filterMatched = filter == null || filter!!.matches(cachedDevice.device) == true
             // Prevent updates while the list shows one of the state messages
-            if (mBluetoothAdapter!!.state == BluetoothAdapter.STATE_ON &&
-                filter?.matches(cachedDevice.device) == true
-            ) {
+            if (mBluetoothAdapter!!.state == BluetoothAdapter.STATE_ON && filterMatched) {
                 createDevicePreference(cachedDevice)
             }
         }
@@ -304,17 +305,14 @@ abstract class DeviceListPreferenceFragment(restrictedKey: String?) :
         }
     }
 
-    private val scanCallback = object : ScanCallback() {
+    private val leScanCallback = object : ScanCallback() {
         override fun onScanResult(callbackType: Int, result: ScanResult) {
-            lifecycleScope?.launch {
-                withContext(Dispatchers.Default) {
-                    if (mBluetoothAdapter!!.state == BluetoothAdapter.STATE_ON) {
-                        val device = result.device
-                        val cachedDevice = mCachedDeviceManager!!.findDevice(device)
-                            ?: mCachedDeviceManager!!.addDevice(device)
-                        createDevicePreference(cachedDevice)
-                    }
+            handleLeScanResult(result)
         }
+
+        override fun onBatchScanResults(results: MutableList<ScanResult>?) {
+            for (result in results.orEmpty()) {
+                handleLeScanResult(result)
             }
         }
 
@@ -328,12 +326,23 @@ abstract class DeviceListPreferenceFragment(restrictedKey: String?) :
         val settings = ScanSettings.Builder()
             .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
             .build()
-        scanner.startScan(leScanFilters, settings, scanCallback)
+        scanner.startScan(leScanFilters, settings, leScanCallback)
     }
 
     private fun stopLeScanning() {
         val scanner = mBluetoothAdapter!!.bluetoothLeScanner
-        scanner?.stopScan(scanCallback)
+        scanner?.stopScan(leScanCallback)
+    }
+
+    private fun handleLeScanResult(result: ScanResult) {
+        lifecycleScope?.launch {
+            withContext(Dispatchers.Default) {
+                val device = result.device
+                val cachedDevice = mCachedDeviceManager!!.findDevice(device)
+                    ?: mCachedDeviceManager!!.addDevice(device, leScanFilters)
+                addDevice(cachedDevice)
+            }
+        }
     }
 
     companion object {

tests/robotests/src/com/android/settings/accessibility/AvailableHearingDeviceUpdaterTest.java

@@ -18,7 +18,6 @@ package com.android.settings.accessibility;
 
 import static com.google.common.truth.Truth.assertThat;
 
-import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.when;
 
 import android.bluetooth.BluetoothDevice;
@@ -80,8 +79,9 @@ public class AvailableHearingDeviceUpdaterTest {
     @Test
     public void isFilterMatch_connectedHearingDevice_returnTrue() {
         CachedBluetoothDevice connectedHearingDevice = mCachedBluetoothDevice;
-        when(connectedHearingDevice.isConnectedHearingAidDevice()).thenReturn(true);
-        doReturn(BluetoothDevice.BOND_BONDED).when(mBluetoothDevice).getBondState();
+        when(connectedHearingDevice.isHearingAidDevice()).thenReturn(true);
+        when(mBluetoothDevice.isConnected()).thenReturn(true);
+        when(mBluetoothDevice.getBondState()).thenReturn(BluetoothDevice.BOND_BONDED);
         when(mCachedDeviceManager.getCachedDevicesCopy()).thenReturn(
                 new ArrayList<>(List.of(connectedHearingDevice)));
 
@@ -91,8 +91,9 @@ public class AvailableHearingDeviceUpdaterTest {
     @Test
     public void isFilterMatch_nonConnectedHearingDevice_returnFalse() {
         CachedBluetoothDevice nonConnectedHearingDevice = mCachedBluetoothDevice;
-        when(nonConnectedHearingDevice.isConnectedHearingAidDevice()).thenReturn(false);
-        doReturn(BluetoothDevice.BOND_BONDED).when(mBluetoothDevice).getBondState();
+        when(nonConnectedHearingDevice.isHearingAidDevice()).thenReturn(true);
+        when(mBluetoothDevice.isConnected()).thenReturn(false);
+        when(mBluetoothDevice.getBondState()).thenReturn(BluetoothDevice.BOND_BONDED);
         when(mCachedDeviceManager.getCachedDevicesCopy()).thenReturn(
                 new ArrayList<>(List.of(nonConnectedHearingDevice)));
 
@@ -103,7 +104,8 @@ public class AvailableHearingDeviceUpdaterTest {
     public void isFilterMatch_connectedBondingHearingDevice_returnFalse() {
         CachedBluetoothDevice connectedBondingHearingDevice = mCachedBluetoothDevice;
         when(connectedBondingHearingDevice.isHearingAidDevice()).thenReturn(true);
-        doReturn(BluetoothDevice.BOND_BONDING).when(mBluetoothDevice).getBondState();
+        when(mBluetoothDevice.isConnected()).thenReturn(true);
+        when(mBluetoothDevice.getBondState()).thenReturn(BluetoothDevice.BOND_BONDING);
         when(mCachedDeviceManager.getCachedDevicesCopy()).thenReturn(
                 new ArrayList<>(List.of(connectedBondingHearingDevice)));
 
@@ -114,8 +116,8 @@ public class AvailableHearingDeviceUpdaterTest {
     public void isFilterMatch_hearingDeviceNotInCachedDevicesList_returnFalse() {
         CachedBluetoothDevice notInCachedDevicesListDevice = mCachedBluetoothDevice;
         when(notInCachedDevicesListDevice.isHearingAidDevice()).thenReturn(true);
-        doReturn(BluetoothDevice.BOND_BONDED).when(mBluetoothDevice).getBondState();
-        doReturn(false).when(mBluetoothDevice).isConnected();
+        when(mBluetoothDevice.isConnected()).thenReturn(true);
+        when(mBluetoothDevice.getBondState()).thenReturn(BluetoothDevice.BOND_BONDED);
         when(mCachedDeviceManager.getCachedDevicesCopy()).thenReturn(new ArrayList<>());
 
         assertThat(mUpdater.isFilterMatched(notInCachedDevicesListDevice)).isEqualTo(false);