Add Settings toggle for Wi-Fi Wakeup.

- Added switch toggle to Configure Wi-Fi Settings for Wi-Fi Wakeup
- Disable Wi-Fi Open Networks Notifications and Wi-Fi Wakeup toggles
  if NETWORK_RECOMMENDATIONS_ENABLED is disabled

Test: make -j40 RunSettingsRoboTests
Bug: 33224845
Change-Id: I2a52c5d1e60f618aefa125c7806fa95ca19a0ca9

src/com/android/settings/wifi/WifiWakeupPreferenceController.java

@@ -0,0 +1,133 @@
+/*
+ * 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.wifi;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.ContentObserver;
+import android.net.Uri;
+import android.os.Handler;
+import android.provider.Settings;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.text.TextUtils;
+
+import com.android.settings.core.PreferenceController;
+import com.android.settings.core.lifecycle.Lifecycle;
+import com.android.settings.core.lifecycle.LifecycleObserver;
+import com.android.settings.core.lifecycle.events.OnPause;
+import com.android.settings.core.lifecycle.events.OnResume;
+
+/**
+ * {@link PreferenceController} that controls whether the Wi-Fi Wakeup feature should be enabled.
+ */
+public class WifiWakeupPreferenceController extends PreferenceController implements
+        LifecycleObserver, OnResume, OnPause {
+
+    private static final String KEY_ENABLE_WIFI_WAKEUP = "enable_wifi_wakeup";
+    private SettingObserver mSettingObserver;
+
+    public WifiWakeupPreferenceController(Context context, Lifecycle lifecycle) {
+        super(context);
+        lifecycle.addObserver(this);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mSettingObserver = new SettingObserver(screen.findPreference(KEY_ENABLE_WIFI_WAKEUP));
+    }
+
+    @Override
+    public void onResume() {
+        if (mSettingObserver != null) {
+            mSettingObserver.register(mContext.getContentResolver(), true /* register */);
+        }
+    }
+
+    @Override
+    public void onPause() {
+        if (mSettingObserver != null) {
+            mSettingObserver.register(mContext.getContentResolver(), false /* register */);
+        }
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (!TextUtils.equals(preference.getKey(), KEY_ENABLE_WIFI_WAKEUP)) {
+            return false;
+        }
+        if (!(preference instanceof SwitchPreference)) {
+            return false;
+        }
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.WIFI_WAKEUP_ENABLED,
+                ((SwitchPreference) preference).isChecked() ? 1 : 0);
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_ENABLE_WIFI_WAKEUP;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        if (!(preference instanceof SwitchPreference)) {
+            return;
+        }
+        final SwitchPreference enableWifiWakeup = (SwitchPreference) preference;
+        enableWifiWakeup.setChecked(Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.WIFI_WAKEUP_ENABLED, 0) == 1);
+        enableWifiWakeup.setEnabled(Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.NETWORK_RECOMMENDATIONS_ENABLED, 0) == 1);
+    }
+
+    class SettingObserver extends ContentObserver {
+        private final Uri NETWORK_RECOMMENDATIONS_ENABLED_URI =
+                Settings.Global.getUriFor(Settings.Global.NETWORK_RECOMMENDATIONS_ENABLED);
+
+        private final Preference mPreference;
+
+        public SettingObserver(Preference preference) {
+            super(new Handler());
+            mPreference = preference;
+        }
+
+        public void register(ContentResolver cr, boolean register) {
+            if (register) {
+                cr.registerContentObserver(NETWORK_RECOMMENDATIONS_ENABLED_URI, false, this);
+            } else {
+                cr.unregisterContentObserver(this);
+            }
+        }
+
+        @Override
+        public void onChange(boolean selfChange, Uri uri) {
+            super.onChange(selfChange, uri);
+            if (NETWORK_RECOMMENDATIONS_ENABLED_URI.equals(uri)) {
+                updateState(mPreference);
+            }
+        }
+    }
+}