Expose lockdown button in settings

Test: manually verified toggle controls lockdown button visibility
Test: make RunSettingsRoboTests
Bug: 37221346
Change-Id: Ie59f9c6a1df1d877b18986c6a58492a5aa789d34

res/values/strings.xml

@@ -777,6 +777,10 @@
     <string name="security_enable_widgets_title">Enable widgets</string>
     <!-- Summary for settings checkbox to disable widgets when the setting has been disabled by an installed device admin [CHAR LIMIT=50] -->
     <string name="security_enable_widgets_disabled_summary">Disabled by admin</string>
+    <!-- Text shown for the title of the lockdown option -->
+    <string name="lockdown_settings_title">Show lockdown option</string>
+    <!-- Text shown for the description of the lockdown option -->
+    <string name="lockdown_settings_summary">Display power button option that turns off extended access and fingerprint unlocking.</string>
     <!-- Text shown for summary of owner info setting (if none set) [CHAR LIMIT=40]-->
     <string name="owner_info_settings_summary">None</string>
     <!-- Description of how many characters are used in owner info [CHAR LIMIT=40]-->

res/xml/security_lockscreen_settings.xml

@@ -33,6 +33,11 @@
         android:title="@string/owner_info_settings_title"
         android:summary="@string/owner_info_settings_summary" />
 
+    <SwitchPreference
+        android:key="security_setting_lockdown_enabled"
+        android:title="@string/lockdown_settings_title"
+        android:summary="@string/lockdown_settings_summary" />
+
     <PreferenceCategory
         android:key="security_setting_lock_screen_notif_work_header"
         android:title="@string/profile_section_header">

src/com/android/settings/security/LockdownButtonPreferenceController.java

@@ -0,0 +1,61 @@
+/*
+ * 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.security;
+
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.TwoStatePreference;
+
+import com.android.internal.widget.LockPatternUtils;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.core.TogglePreferenceController;
+
+public class LockdownButtonPreferenceController extends TogglePreferenceController {
+
+    private static final String KEY_LOCKDOWN_ENALBED = "security_setting_lockdown_enabled";
+
+    private final LockPatternUtils mLockPatternUtils;
+
+    public LockdownButtonPreferenceController(Context context) {
+        super(context, KEY_LOCKDOWN_ENALBED);
+        mLockPatternUtils = new LockPatternUtils(context);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (mLockPatternUtils.isSecure(UserHandle.myUserId())) {
+            return BasePreferenceController.AVAILABLE;
+        } else {
+            return BasePreferenceController.DISABLED_FOR_USER;
+        }
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.LOCKDOWN_IN_POWER_MENU, 0) != 0;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                Settings.Secure.LOCKDOWN_IN_POWER_MENU, isChecked ? 1 : 0);
+        return true;
+    }
+}

src/com/android/settings/security/LockscreenDashboardFragment.java

@@ -93,6 +93,8 @@ public class LockscreenDashboardFragment extends DashboardFragment
         mOwnerInfoPreferenceController =
                 new OwnerInfoPreferenceController(context, this, lifecycle);
         controllers.add(mOwnerInfoPreferenceController);
+        controllers.add(new LockdownButtonPreferenceController(context));
+
         return controllers;
     }
 
@@ -122,6 +124,7 @@ public class LockscreenDashboardFragment extends DashboardFragment
                             KEY_ADD_USER_FROM_LOCK_SCREEN));
                     controllers.add(new OwnerInfoPreferenceController(
                             context, null /* fragment */, null /* lifecycle */));
+                    controllers.add(new LockdownButtonPreferenceController(context));
                     return controllers;
                 }
 

tests/robotests/src/com/android/settings/security/LockdownButtonPreferenceControllerTest.java

@@ -0,0 +1,98 @@
+/*
+ * 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.security;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.support.v14.preference.SwitchPreference;
+
+import com.android.internal.widget.LockPatternUtils;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+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;
+import org.robolectric.util.ReflectionHelpers;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class LockdownButtonPreferenceControllerTest {
+    @Mock
+    private LockPatternUtils mLockPatternUtils;
+    private SwitchPreference mPreference;
+
+    private Context mContext;
+    private LockdownButtonPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mPreference = new SwitchPreference(mContext);
+
+        mController = spy(new LockdownButtonPreferenceController(mContext));
+        ReflectionHelpers.setField(mController, "mLockPatternUtils", mLockPatternUtils);
+    }
+
+    @Test
+    public void isAvailable_lockSet_shouldReturnTrue() throws Exception {
+        when(mLockPatternUtils.isSecure(anyInt())).thenReturn(true);
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void isAvailable_lockUnset_shouldReturnFalse() throws Exception {
+        when(mLockPatternUtils.isSecure(anyInt())).thenReturn(false);
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void onPreferenceChange_settingIsUpdated() throws Exception {
+        boolean state = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.LOCKDOWN_IN_POWER_MENU, 0) != 0;
+        assertThat(mController.onPreferenceChange(mPreference, !state)).isTrue();
+        boolean newState = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.LOCKDOWN_IN_POWER_MENU, 0) != 0;
+        assertThat(newState).isEqualTo(!state);
+    }
+
+    @Test
+    public void onSettingChange_preferenceIsUpdated() throws Exception {
+        boolean state = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.LOCKDOWN_IN_POWER_MENU, 0) != 0;
+        mController.updateState(mPreference);
+        assertThat(mPreference.isChecked()).isEqualTo(state);
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                Settings.Secure.LOCKDOWN_IN_POWER_MENU, state ? 0 : 1);
+
+        mController.updateState(mPreference);
+        assertThat(mPreference.isChecked()).isEqualTo(!state);
+    }
+}