Add bluetooth discoverable footer preference in connected devices page

* For fix the TreeHugger error in pi-dev, cherry pick the ag/4042014 in
  master and fix TreeHugger error. Change android.support.v7.* to androidx.*
* Dynamicly add preference in controller
* Add test cases for DiscoverableFooterPreferenceController

Bug: 79294219
Test: make -j50 RunSettingsRoboTests
Change-Id: Id4c1e86c9a0a0cd69d8106a18f2cf4a0fa31782b

src/com/android/settings/connecteddevice/ConnectedDeviceDashboardFragment.java

@@ -26,8 +26,10 @@ import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.dashboard.SummaryLoader;
 import com.android.settings.nfc.NfcPreferenceController;
 import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.search.SearchIndexable;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -61,12 +63,27 @@ public class ConnectedDeviceDashboardFragment extends DashboardFragment {
         return R.xml.connected_devices;
     }
 
+    @Override
+    protected List<AbstractPreferenceController> createPreferenceControllers(Context context) {
+        return buildPreferenceControllers(context);
+    }
+
+    private static List<AbstractPreferenceController> buildPreferenceControllers(Context context) {
+        final List<AbstractPreferenceController> controllers = new ArrayList<>();
+        final DiscoverableFooterPreferenceController discoverableFooterPreferenceController =
+                new DiscoverableFooterPreferenceController(context);
+        controllers.add(discoverableFooterPreferenceController);
+
+        return controllers;
+    }
+
     @Override
     public void onAttach(Context context) {
         super.onAttach(context);
         use(AvailableMediaDeviceGroupController.class).init(this);
         use(ConnectedDeviceGroupController.class).init(this);
         use(PreviouslyConnectedDevicePreferenceController.class).init(this);
+        use(DiscoverableFooterPreferenceController.class).init(this);
     }
 
     @VisibleForTesting

src/com/android/settings/connecteddevice/DiscoverableFooterPreferenceController.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.connecteddevice;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.PreferenceScreen;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settingslib.widget.FooterPreference;
+import com.android.settingslib.widget.FooterPreferenceMixin;
+
+/**
+ * Controller that shows and updates the bluetooth device name
+ */
+public class DiscoverableFooterPreferenceController extends BasePreferenceController {
+    private static final String KEY = "discoverable_footer_preference";
+
+    private FooterPreference mPreference;
+    private FooterPreferenceMixin mFooterPreferenceMixin;
+
+
+    public DiscoverableFooterPreferenceController(Context context) { super(context, KEY); }
+
+    public void init(DashboardFragment fragment) {
+        mFooterPreferenceMixin = new FooterPreferenceMixin(fragment, fragment.getLifecycle());
+    }
+
+    @VisibleForTesting
+    void init(FooterPreferenceMixin footerPreferenceMixin, FooterPreference preference) {
+        mFooterPreferenceMixin = footerPreferenceMixin;
+        mPreference = preference;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        addFooterPreference(screen);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
+                ? AVAILABLE
+                : UNSUPPORTED_ON_DEVICE;
+    }
+
+    private void addFooterPreference(PreferenceScreen screen) {
+        mPreference = mFooterPreferenceMixin.createFooterPreference();
+        mPreference.setKey(KEY);
+        screen.addPreference(mPreference);
+    }
+}

tests/robotests/src/com/android/settings/connecteddevice/DiscoverableFooterPreferenceControllerTest.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+package com.android.settings.connecteddevice;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.ShadowBluetoothAdapter;
+import com.android.settings.testutils.shadow.ShadowBluetoothPan;
+import com.android.settings.testutils.shadow.ShadowLocalBluetoothAdapter;
+import com.android.settingslib.widget.FooterPreference;
+import com.android.settingslib.widget.FooterPreferenceMixin;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(shadows = {ShadowBluetoothPan.class, ShadowBluetoothAdapter.class,
+        ShadowLocalBluetoothAdapter.class})
+public class DiscoverableFooterPreferenceControllerTest {
+    @Mock
+    private PackageManager mPackageManager;
+    @Mock
+    private PreferenceScreen mScreen;
+    @Mock
+    private FooterPreferenceMixin mFooterPreferenceMixin;
+
+    private Context mContext;
+    private DiscoverableFooterPreferenceController mDiscoverableFooterPreferenceController;
+    private FooterPreference mPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(RuntimeEnvironment.application);
+        doReturn(mPackageManager).when(mContext).getPackageManager();
+        mDiscoverableFooterPreferenceController =
+                new DiscoverableFooterPreferenceController(mContext);
+        mPreference = spy(new FooterPreference(mContext));
+        mDiscoverableFooterPreferenceController.init(mFooterPreferenceMixin, mPreference);
+    }
+
+    @Test
+    public void getAvailabilityStatus_noBluetoothFeature_returnUnSupported() {
+        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)).thenReturn(false);
+
+        assertThat(mDiscoverableFooterPreferenceController.getAvailabilityStatus()).isEqualTo(
+                BasePreferenceController.UNSUPPORTED_ON_DEVICE);
+    }
+
+    @Test
+    public void getAvailabilityStatus_BluetoothFeature_returnSupported() {
+        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)).thenReturn(true);
+
+        assertThat(mDiscoverableFooterPreferenceController.getAvailabilityStatus()).isEqualTo(
+                BasePreferenceController.AVAILABLE);
+    }
+
+    @Test
+    public void displayPreference() {
+        when(mFooterPreferenceMixin.createFooterPreference()).thenReturn(mPreference);
+        mDiscoverableFooterPreferenceController.displayPreference(mScreen);
+
+        verify(mPreference).setKey(anyString());
+        verify(mScreen).addPreference(mPreference);
+    }
+}

tests/robotests/src/com/android/settings/testutils/shadow/ShadowBluetoothAdapter.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.testutils.shadow;
+
+import android.bluetooth.BluetoothAdapter;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Implements(value = BluetoothAdapter.class, inheritImplementationMethods = true)
+public class ShadowBluetoothAdapter extends org.robolectric.shadows.ShadowBluetoothAdapter {
+    /**
+     * Do nothing, implement it to avoid null pointer error inside BluetoothAdapter
+     */
+    @Implementation
+    public List<Integer> getSupportedProfiles() {
+        return new ArrayList<Integer>();
+    }
+}

tests/robotests/src/com/android/settings/testutils/shadow/ShadowLocalBluetoothAdapter.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.settings.testutils.shadow;
+
+import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+
+@Implements(LocalBluetoothAdapter.class)
+public class ShadowLocalBluetoothAdapter {
+
+    private static String sName;
+
+    @Implementation
+    public String getName() {
+        return sName;
+    }
+
+    public static void setName(String name) {
+        sName = name;
+    }
+}