Disable managed services special access screens...

... on low ram devices.

- Remove them from the 'Special app access' screen
- Display an error message if an app intents directly to
them

Bug: 35219985
Test: visual, and runtest --path ManagedAccessSettingsLowRamTest.java,
when the device is in low ram mode and when it's not.
Change-Id: Ied919cb248ae56683a00e3492c4737dfd00449ac

AndroidManifest.xml

@@ -2511,6 +2511,16 @@
             </intent-filter>
         </activity>
 
+        <activity android:name="Settings$SpecialAccessSettingsActivity"
+                  android:taskAffinity="">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
+                       android:value="com.android.settings.applications.SpecialAccessSettings" />
+        </activity>
+
         <activity android:name="Settings$NotificationAccessSettingsActivity"
                   android:label="@string/manage_notification_access_title"
                   android:taskAffinity="">

res/values/strings.xml

@@ -8963,4 +8963,7 @@
 
     <!-- The divider symbol between different parts of the notification header including spaces. not translatable [CHAR LIMIT=3] -->
     <string name="notification_header_divider_symbol_with_spaces" translatable="false">" • "</string>
+
+    <!-- Note displayed when certain features are not available on low ram devices. [CHAR LIMIT=NONE] -->
+    <string name="disabled_low_ram_device">This feature is not available on this device</string>
 </resources>

res/xml/app_and_notification.xml

@@ -70,8 +70,12 @@
 
     <Preference
         android:key="special_access"
-        android:fragment="com.android.settings.applications.SpecialAccessSettings"
         android:title="@string/special_access"
-        android:order="20" />
+        android:order="20" >
+        <intent
+            android:action="android.intent.action.MAIN"
+            android:targetPackage="com.android.settings"
+            android:targetClass="com.android.settings.Settings$SpecialAccessSettingsActivity" />
+    </Preference>
 
 </PreferenceScreen>

src/com/android/settings/Settings.java

@@ -98,6 +98,7 @@ public class Settings extends SettingsActivity {
     public static class DreamSettingsActivity extends SettingsActivity { /* empty */ }
     public static class NotificationStationActivity extends SettingsActivity { /* empty */ }
     public static class UserSettingsActivity extends SettingsActivity { /* empty */ }
+    public static class SpecialAccessSettingsActivity extends SettingsActivity { /* empty */ }
     public static class NotificationAccessSettingsActivity extends SettingsActivity { /* empty */ }
     public static class VrListenersSettingsActivity extends SettingsActivity { /* empty */ }
     public static class PictureInPictureSettingsActivity extends SettingsActivity { /* empty */ }

src/com/android/settings/applications/SpecialAccessSettings.java

@@ -14,8 +14,11 @@
 
 package com.android.settings.applications;
 
+import android.app.ActivityManager;
 import android.content.Context;
+import android.os.Bundle;
 import android.provider.SearchIndexableResource;
+import android.support.v7.preference.Preference;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
@@ -31,6 +34,9 @@ public class SpecialAccessSettings extends DashboardFragment {
 
     private static final String TAG = "SpecialAccessSettings";
 
+    private static final String[] DISABLED_FEATURES_LOW_RAM =
+            new String[] {"notification_access", "zen_access", "enabled_vr_listeners"};
+
     @Override
     protected String getLogTag() {
         return TAG;
@@ -41,6 +47,20 @@ public class SpecialAccessSettings extends DashboardFragment {
         return R.xml.special_access;
     }
 
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        if (ActivityManager.isLowRamDeviceStatic()) {
+            for (String disabledFeature : DISABLED_FEATURES_LOW_RAM) {
+                Preference pref = findPreference(disabledFeature);
+                if (pref != null) {
+                    removePreference(disabledFeature);
+                }
+            }
+        }
+    }
+
     @Override
     protected List<PreferenceController> getPreferenceControllers(Context context) {
         return null;

src/com/android/settings/core/gateway/SettingsGateway.java

@@ -53,6 +53,7 @@ import com.android.settings.applications.PictureInPictureDetails;
 import com.android.settings.applications.PictureInPictureSettings;
 import com.android.settings.applications.ProcessStatsSummary;
 import com.android.settings.applications.ProcessStatsUi;
+import com.android.settings.applications.SpecialAccessSettings;
 import com.android.settings.applications.UsageAccessDetails;
 import com.android.settings.applications.VrListenerSettings;
 import com.android.settings.applications.WriteSettingsDetails;
@@ -189,6 +190,7 @@ public class SettingsGateway {
             DataUsageSummary.class.getName(),
             DreamSettings.class.getName(),
             UserSettings.class.getName(),
+            SpecialAccessSettings.class.getName(),
             NotificationAccessSettings.class.getName(),
             ZenAccessSettings.class.getName(),
             PrintSettingsFragment.class.getName(),

src/com/android/settings/notification/NotificationAccessSettings.java

@@ -16,21 +16,18 @@
 
 package com.android.settings.notification;
 
+import android.app.ActivityManager;
 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.Fragment;
-import android.app.NotificationManager;
 import android.content.ComponentName;
-import android.content.Context;
 import android.content.DialogInterface;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.service.notification.NotificationListenerService;
-import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
-import com.android.internal.logging.MetricsLogger;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;

src/com/android/settings/notification/ZenAccessSettings.java

@@ -92,6 +92,7 @@ public class ZenAccessSettings extends EmptyTextSettings {
     @Override
     public void onResume() {
         super.onResume();
+        if (!ActivityManager.isLowRamDeviceStatic()) {
             reloadList();
             getContentResolver().registerContentObserver(
                     Secure.getUriFor(Secure.ENABLED_NOTIFICATION_POLICY_ACCESS_PACKAGES), false,
@@ -99,13 +100,18 @@ public class ZenAccessSettings extends EmptyTextSettings {
             getContentResolver().registerContentObserver(
                     Secure.getUriFor(Secure.ENABLED_NOTIFICATION_LISTENERS), false,
                     mObserver);
+        } else {
+            setEmptyText(R.string.disabled_low_ram_device);
+        }
     }
 
     @Override
     public void onPause() {
         super.onPause();
+        if (!ActivityManager.isLowRamDeviceStatic()) {
             getContentResolver().unregisterContentObserver(mObserver);
         }
+    }
 
     private void reloadList() {
         final PreferenceScreen screen = getPreferenceScreen();

src/com/android/settings/utils/ManagedServiceSettings.java

@@ -17,6 +17,7 @@
 package com.android.settings.utils;
 
 import android.annotation.Nullable;
+import android.app.ActivityManager;
 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.Fragment;
@@ -91,8 +92,12 @@ public abstract class ManagedServiceSettings extends EmptyTextSettings {
     @Override
     public void onResume() {
         super.onResume();
+        if (!ActivityManager.isLowRamDeviceStatic()) {
             mServiceListing.reload();
             mServiceListing.setListening(true);
+        } else {
+            setEmptyText(R.string.disabled_low_ram_device);
+        }
     }
 
     @Override
@@ -230,7 +235,6 @@ public abstract class ManagedServiceSettings extends EmptyTextSettings {
     public static class Config {
         public String tag;
         public String setting;
-        public String secondarySetting;
         public String intentAction;
         public String permission;
         public String noun;

tests/app/src/com/android/settings/ManagedAccessSettingsLowRamTest.java

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2017 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;
+
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.assertion.ViewAssertions.doesNotExist;
+import static android.support.test.espresso.assertion.ViewAssertions.matches;
+import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+
+import static junit.framework.Assert.assertTrue;
+
+import android.app.ActivityManager;
+import android.app.Instrumentation;
+import android.content.Context;
+import android.content.Intent;
+import android.provider.Settings;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+import android.support.test.uiautomator.UiObject;
+import android.support.test.uiautomator.UiSelector;
+
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class ManagedAccessSettingsLowRamTest {
+
+    private Instrumentation mInstrumentation;
+    private Context mTargetContext;
+
+    @Before
+    public void setUp() {
+        mInstrumentation = InstrumentationRegistry.getInstrumentation();
+        mTargetContext = mInstrumentation.getTargetContext();
+    }
+
+    @Test
+    public void testManagedAccessOptionsVisibility() throws Exception {
+        mInstrumentation.startActivitySync(new Intent(mTargetContext,
+                com.android.settings.Settings.SpecialAccessSettingsActivity.class));
+
+        String[] managedServiceLabels = new String[] {"Do Not Disturb access",
+                "VR helper services", "Notification access"};
+        for (String label : managedServiceLabels) {
+            if (ActivityManager.isLowRamDeviceStatic()) {
+                onView(withText(label)).check(doesNotExist());
+            } else {
+                onView(withText(label)).check(matches(isDisplayed()));
+            }
+        }
+    }
+
+    @Test
+    public void launchNotificationSetting_onlyWorksIfNotLowRam() {
+        final Intent intent = new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS);
+
+        mInstrumentation.startActivitySync(intent);
+
+        final String label = "This feature is not available on this device";
+        if (ActivityManager.isLowRamDeviceStatic()) {
+            onView(withText(label)).check(matches(isDisplayed()));
+        } else {
+            onView(withText(label)).check(doesNotExist());
+        }
+    }
+
+    @Test
+    public void launchDndSetting_onlyWorksIfNotLowRam() {
+        final Intent intent = new Intent(Settings.ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS);
+
+        mInstrumentation.startActivitySync(intent);
+
+        final String label = "This feature is not available on this device";
+        if (ActivityManager.isLowRamDeviceStatic()) {
+            onView(withText(label)).check(matches(isDisplayed()));
+        } else {
+            onView(withText(label)).check(doesNotExist());
+        }
+    }
+
+    @Test
+    public void launchVrSetting_onlyWorksIfNotLowRam() {
+        final Intent intent = new Intent(Settings.ACTION_VR_LISTENER_SETTINGS);
+
+        mInstrumentation.startActivitySync(intent);
+
+        final String label = "This feature is not available on this device";
+        if (ActivityManager.isLowRamDeviceStatic()) {
+            onView(withText(label)).check(matches(isDisplayed()));
+        } else {
+            onView(withText(label)).check(doesNotExist());
+        }
+    }
+
+}