Add temporary link to PermissionController for new default apps UI.

This change adds a temporary link in the default apps settings to
allow launching the new default apps UI in PermissionController during
the process we migrate default apps to use roles.

Bug: 110557011
Test: manually tested the UI
Change-Id: I0ac340acd5a077c74b48b28c97f517adb2084a36

res/values/strings.xml

@@ -8389,6 +8389,12 @@
     <!--  Title for Default Phone app settings [CHAR LIMIT=30] -->
     <string name="default_phone_title">Phone app</string>
 
+    <!--
+     ~ STOPSHIP(b/110557011): Remove once the new UI is ready.
+     -->
+    <!-- Title for Roles settings [CHAR LIMIT=30] -->
+    <string name="roles_title">Roles</string>
+
     <!-- Label of default app for current setting [CHAR LIMIT=40] -->
     <string name="default_app">(Default)</string>
 

res/xml/app_default_settings.xml

@@ -79,6 +79,14 @@
         android:fragment="com.android.settings.applications.managedomainurls.ManageDomainUrls"
         settings:keywords="@string/keywords_default_links"/>
 
+    <!--
+     ~ STOPSHIP(b/110557011): Remove once the new UI is ready.
+     -->
+    <Preference
+        android:key="roles"
+        android:title="@string/roles_title"
+        settings:controller="com.android.settings.applications.defaultapps.RolesPreferenceController" />
+
     <com.android.settings.widget.WorkOnlyCategory
         android:key="work_app_defaults"
         android:title="@string/default_for_work">

src/com/android/settings/applications/defaultapps/RolesPreferenceController.java

@@ -0,0 +1,62 @@
+/*
+ * 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.applications.defaultapps;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.provider.Settings;
+import android.text.TextUtils;
+
+import androidx.preference.Preference;
+
+import com.android.settings.core.BasePreferenceController;
+
+/**
+ * STOPSHIP(b/110557011): Remove once the new UI is ready.
+ */
+public class RolesPreferenceController extends BasePreferenceController {
+
+    private Intent mIntent;
+
+    public RolesPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+
+        PackageManager packageManager = context.getPackageManager();
+        String packageName = packageManager.getPermissionControllerPackageName();
+        if (packageName != null) {
+            mIntent = new Intent(Settings.ACTION_MANAGE_DEFAULT_APPS_SETTINGS)
+                    .setPackage(packageName);
+        }
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mIntent != null ? AVAILABLE_UNSEARCHABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (TextUtils.equals(preference.getKey(), mPreferenceKey)) {
+            if (mIntent != null) {
+                mContext.startActivity(mIntent);
+            }
+            return true;
+        }
+        return false;
+    }
+}

tests/robotests/src/com/android/settings/applications/defaultapps/RolesPreferenceControllerTest.java

@@ -0,0 +1,136 @@
+/*
+ * 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.applications.defaultapps;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class RolesPreferenceControllerTest {
+
+    private static final String PREFERENCE_KEY = "roles";
+    private static final String DIFFERENT_PREFERENCE_KEY = "different";
+    private static final String PERMISSION_CONTROLLER_PACKAGE_NAME =
+            "com.android.permissioncontroller";
+
+    @Mock
+    private Context mContext;
+    @Mock
+    private PackageManager mPackageManager;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        when(mContext.getPackageManager()).thenReturn(mPackageManager);
+    }
+
+    @Test
+    public void getAvailabilityStatus_noPermissionController_shouldReturnUnsupportedOnDevice() {
+        when(mPackageManager.getPermissionControllerPackageName()).thenReturn(null);
+        RolesPreferenceController controller = new RolesPreferenceController(mContext,
+                PREFERENCE_KEY);
+
+        assertThat(controller.getAvailabilityStatus())
+                .isEqualTo(BasePreferenceController.UNSUPPORTED_ON_DEVICE);
+    }
+
+    @Test
+    public void getAvailabilityStatus_hasPermissionController_shouldReturnAvailableUnsearchable() {
+        when(mPackageManager.getPermissionControllerPackageName())
+                .thenReturn(PERMISSION_CONTROLLER_PACKAGE_NAME);
+        RolesPreferenceController controller = new RolesPreferenceController(mContext,
+                PREFERENCE_KEY);
+
+        assertThat(controller.getAvailabilityStatus())
+                .isEqualTo(BasePreferenceController.AVAILABLE_UNSEARCHABLE);
+    }
+
+    @Test
+    public void handlePreferenceTreeClick_differentKey_shouldReturnFalse() {
+        when(mPackageManager.getPermissionControllerPackageName())
+                .thenReturn(PERMISSION_CONTROLLER_PACKAGE_NAME);
+        RolesPreferenceController controller = new RolesPreferenceController(mContext,
+                PREFERENCE_KEY);
+        Preference preference = mock(Preference.class);
+        when(preference.getKey()).thenReturn(DIFFERENT_PREFERENCE_KEY);
+
+        assertThat(controller.handlePreferenceTreeClick(preference)).isFalse();
+    }
+
+    @Test
+    public void handlePreferenceTreeClick_sameKey_shouldReturnTrue() {
+        when(mPackageManager.getPermissionControllerPackageName())
+                .thenReturn(PERMISSION_CONTROLLER_PACKAGE_NAME);
+        RolesPreferenceController controller = new RolesPreferenceController(mContext,
+                PREFERENCE_KEY);
+        Preference preference = mock(Preference.class);
+        when(preference.getKey()).thenReturn(PREFERENCE_KEY);
+
+        assertThat(controller.handlePreferenceTreeClick(preference)).isTrue();
+    }
+
+    @Test
+    public void handlePreferenceTreeClick_noPermissionController_shouldNotStartActivity() {
+        when(mPackageManager.getPermissionControllerPackageName()).thenReturn(null);
+        RolesPreferenceController controller = new RolesPreferenceController(mContext,
+                PREFERENCE_KEY);
+        Preference preference = mock(Preference.class);
+        when(preference.getKey()).thenReturn(PREFERENCE_KEY);
+        controller.handlePreferenceTreeClick(preference);
+
+        verify(mContext, never()).startActivity(any(Intent.class));
+    }
+
+    @Test
+    public void handlePreferenceTreeClick_hasPermissionController_shouldStartActivityWithIntent() {
+        when(mPackageManager.getPermissionControllerPackageName())
+                .thenReturn(PERMISSION_CONTROLLER_PACKAGE_NAME);
+        RolesPreferenceController controller = new RolesPreferenceController(mContext,
+                PREFERENCE_KEY);
+        Preference preference = mock(Preference.class);
+        when(preference.getKey()).thenReturn(PREFERENCE_KEY);
+        controller.handlePreferenceTreeClick(preference);
+        ArgumentCaptor<Intent> intent = ArgumentCaptor.forClass(Intent.class);
+
+        verify(mContext).startActivity(intent.capture());
+        assertThat(intent.getValue().getAction())
+                .isEqualTo(Settings.ACTION_MANAGE_DEFAULT_APPS_SETTINGS);
+        assertThat(intent.getValue().getPackage()).isEqualTo(PERMISSION_CONTROLLER_PACKAGE_NAME);
+    }
+}