Decouple BluetoothDevicePreference and DeviceListPreferenceFragment

The BluetoothDevicePreference need to know whether to display with an
invalid name. However pass in the whole fragment is over-killing.

This cl decouple it for several reasons:
1. In P, BluetoothDevicePreference will be used in other fragment.
2. In preference lifecycle from end user side, this flag is constant.

Bug: 69333961
Test: RunSettingsRoboTests
Change-Id: I3dbcd2a4aafa3ead74371534250e5e7c3ee221f7

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

@@ -52,19 +52,19 @@ public final class BluetoothDevicePreference extends GearPreference implements
 
     private final CachedBluetoothDevice mCachedDevice;
     private final UserManager mUserManager;
+    private final boolean mShowDevicesWithoutNames;
 
     private AlertDialog mDisconnectDialog;
     private String contentDescription = null;
-    private DeviceListPreferenceFragment mDeviceListPreferenceFragment;
     /* Talk-back descriptions for various BT icons */
     Resources mResources;
 
     public BluetoothDevicePreference(Context context, CachedBluetoothDevice cachedDevice,
-            DeviceListPreferenceFragment deviceListPreferenceFragment) {
+            boolean showDeviceWithoutNames) {
         super(context, null);
         mResources = getContext().getResources();
         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
-        mDeviceListPreferenceFragment = deviceListPreferenceFragment;
+        mShowDevicesWithoutNames = showDeviceWithoutNames;
 
         if (sDimAlpha == Integer.MIN_VALUE) {
             TypedValue outValue = new TypedValue();
@@ -134,8 +134,7 @@ public final class BluetoothDevicePreference extends GearPreference implements
 
         // Device is only visible in the UI if it has a valid name besides MAC address or when user
         // allows showing devices without user-friendly name in developer settings
-        setVisible(mDeviceListPreferenceFragment.shouldShowDevicesWithoutNames()
-                || mCachedDevice.hasHumanReadableName());
+        setVisible(mShowDevicesWithoutNames || mCachedDevice.hasHumanReadableName());
 
         // This could affect ordering, so notify that
         notifyHierarchyChanged();

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

@@ -98,6 +98,8 @@ public abstract class DeviceListPreferenceFragment extends
             return;
         }
         mLocalAdapter = mLocalManager.getBluetoothAdapter();
+        mShowDevicesWithoutNames = SystemProperties.getBoolean(
+                BLUETOOTH_SHOW_DEVICES_WITHOUT_NAMES_PROPERTY, false);
 
         initPreferencesFromPreferenceScreen();
 
@@ -110,8 +112,6 @@ public abstract class DeviceListPreferenceFragment extends
     @Override
     public void onStart() {
         super.onStart();
-        mShowDevicesWithoutNames = SystemProperties.getBoolean(
-                BLUETOOTH_SHOW_DEVICES_WITHOUT_NAMES_PROPERTY, false);
         if (mLocalManager == null || isUiRestricted()) return;
 
         mLocalManager.setForegroundActivity(getActivity());
@@ -190,7 +190,8 @@ public abstract class DeviceListPreferenceFragment extends
         BluetoothDevicePreference preference = (BluetoothDevicePreference) getCachedPreference(key);
 
         if (preference == null) {
-            preference = new BluetoothDevicePreference(getPrefContext(), cachedDevice, this);
+            preference = new BluetoothDevicePreference(getPrefContext(), cachedDevice,
+                    mShowDevicesWithoutNames);
             preference.setKey(key);
             mDeviceListGroup.addPreference(preference);
         } else {

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

@@ -41,6 +41,7 @@ import org.robolectric.util.ReflectionHelpers;
 import static com.google.common.truth.Truth.assertThat;
 
 import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.spy;
@@ -51,6 +52,7 @@ import static org.mockito.Mockito.when;
 @Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION,
         shadows = SettingsShadowResources.class)
 public class BluetoothDevicePreferenceTest {
+    private static final boolean SHOW_DEVICES_WITHOUT_NAMES = true;
 
     private Context mContext;
     @Mock
@@ -70,7 +72,7 @@ public class BluetoothDevicePreferenceTest {
         mFakeFeatureFactory = (FakeFeatureFactory) FakeFeatureFactory.getFactory(mContext);
         mMetricsFeatureProvider = mFakeFeatureFactory.getMetricsFeatureProvider();
         mPreference = new BluetoothDevicePreference(mContext, mCachedBluetoothDevice,
-                mDeviceListPreferenceFragment);
+                SHOW_DEVICES_WITHOUT_NAMES);
     }
 
     @Test
@@ -177,47 +179,22 @@ public class BluetoothDevicePreferenceTest {
     }
 
     @Test
-    public void testVisible_notVisibleThenVisible() {
-        when(mDeviceListPreferenceFragment.shouldShowDevicesWithoutNames()).thenReturn(false);
-        final boolean[] humanReadableName = {false};
-        doAnswer(invocation -> humanReadableName[0]).when(mCachedBluetoothDevice)
-                .hasHumanReadableName();
+    public void testVisible_showDeviceWithoutNames_visible() {
+        doReturn(false).when(mCachedBluetoothDevice).hasHumanReadableName();
         BluetoothDevicePreference preference =
                 new BluetoothDevicePreference(mContext, mCachedBluetoothDevice,
-                        mDeviceListPreferenceFragment);
-        assertThat(preference.isVisible()).isFalse();
-        humanReadableName[0] = true;
-        preference.onDeviceAttributesChanged();
+                        SHOW_DEVICES_WITHOUT_NAMES);
+
         assertThat(preference.isVisible()).isTrue();
     }
 
     @Test
-    public void testVisible_visibleThenNotVisible() {
-        when(mDeviceListPreferenceFragment.shouldShowDevicesWithoutNames()).thenReturn(false);
-        final boolean[] humanReadableName = {true};
-        doAnswer(invocation -> humanReadableName[0]).when(mCachedBluetoothDevice)
-                .hasHumanReadableName();
+    public void testVisible_hideDeviceWithoutNames_invisible() {
+        doReturn(false).when(mCachedBluetoothDevice).hasHumanReadableName();
         BluetoothDevicePreference preference =
                 new BluetoothDevicePreference(mContext, mCachedBluetoothDevice,
-                        mDeviceListPreferenceFragment);
-        assertThat(preference.isVisible()).isTrue();
-        humanReadableName[0] = false;
-        preference.onDeviceAttributesChanged();
-        assertThat(preference.isVisible()).isFalse();
-    }
+                        false);
 
-    @Test
-    public void testVisible_alwaysVisibleWhenEnabled() {
-        when(mDeviceListPreferenceFragment.shouldShowDevicesWithoutNames()).thenReturn(true);
-        final boolean[] humanReadableName = {true};
-        doAnswer(invocation -> humanReadableName[0]).when(mCachedBluetoothDevice)
-                .hasHumanReadableName();
-        BluetoothDevicePreference preference =
-                new BluetoothDevicePreference(mContext, mCachedBluetoothDevice,
-                        mDeviceListPreferenceFragment);
-        assertThat(preference.isVisible()).isTrue();
-        humanReadableName[0] = false;
-        preference.onDeviceAttributesChanged();
-        assertThat(preference.isVisible()).isTrue();
+        assertThat(preference.isVisible()).isFalse();
     }
 }