Create a feature flag for Search v2.

Also moved all other flags in a common file so we can track them more
easily.

Bug: 68825426
Bug: 64938328
Test: rerun robotests
Change-Id: I3fc805054cb960bedd965b1b907be759df50b95d
diff --git a/src/com/android/settings/DeviceInfoSettings.java b/src/com/android/settings/DeviceInfoSettings.java
index 5c26645..4cabccd 100644
--- a/src/com/android/settings/DeviceInfoSettings.java
+++ b/src/com/android/settings/DeviceInfoSettings.java
@@ -16,6 +16,8 @@
 
 package com.android.settings;
 
+import static com.android.settings.core.FeatureFlags.DEVICE_INFO_V2;
+
 import android.app.Activity;
 import android.app.Fragment;
 import android.content.Context;
@@ -56,8 +58,6 @@
 
 public class DeviceInfoSettings extends DashboardFragment implements Indexable {
 
-    public static final String DEVICE_INFO_V2_FEATURE_FLAG = "device_info_v2";
-
     private static final String LOG_TAG = "DeviceInfoSettings";
 
     private static final String KEY_LEGAL_CONTAINER = "legal_container";
@@ -89,7 +89,7 @@
 
     @Override
     protected int getPreferenceScreenResId() {
-        return FeatureFlagUtils.isEnabled(DEVICE_INFO_V2_FEATURE_FLAG)
+        return FeatureFlagUtils.isEnabled(DEVICE_INFO_V2)
                 ? R.xml.device_info_settings_v2 : R.xml.device_info_settings;
     }
 
@@ -126,7 +126,7 @@
 
     private static List<AbstractPreferenceController> buildPreferenceControllers(Context context,
             Activity activity, Fragment fragment, Lifecycle lifecycle) {
-        if (FeatureFlagUtils.isEnabled(DEVICE_INFO_V2_FEATURE_FLAG)) {
+        if (FeatureFlagUtils.isEnabled(DEVICE_INFO_V2)) {
             final List<AbstractPreferenceController> controllers = new ArrayList<>();
             // Device name
 
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index cbae80c..279ff88 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -16,6 +16,8 @@
 
 package com.android.settings;
 
+import static com.android.settings.core.FeatureFlags.DEV_OPTION_V1;
+
 import android.os.Bundle;
 import android.util.FeatureFlagUtils;
 
@@ -65,7 +67,7 @@
     @Deprecated
     public static class DevelopmentSettingsActivity extends SettingsActivity {
         public static final boolean isEnabled() {
-            return FeatureFlagUtils.isEnabled("dev_option_v1");
+            return FeatureFlagUtils.isEnabled(DEV_OPTION_V1);
         }
     }
     public static class DevelopmentSettingsDashboardActivity extends SettingsActivity { /* empty */ }
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 7203e24..1a013cc 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -62,7 +62,6 @@
 import com.android.settings.dashboard.DashboardFeatureProvider;
 import com.android.settings.dashboard.DashboardSummary;
 import com.android.settings.overlay.FeatureFactory;
-import com.android.settings.search.SearchActivity;
 import com.android.settings.wfd.WifiDisplaySettings;
 import com.android.settings.widget.SwitchBar;
 import com.android.settingslib.development.DevelopmentSettingsEnabler;
@@ -76,7 +75,7 @@
 public class SettingsActivity extends SettingsDrawerActivity
         implements PreferenceManager.OnPreferenceTreeClickListener,
         PreferenceFragment.OnPreferenceStartFragmentCallback,
-        ButtonBarHandler, FragmentManager.OnBackStackChangedListener, OnClickListener {
+        ButtonBarHandler, FragmentManager.OnBackStackChangedListener {
 
     private static final String LOG_TAG = "Settings";
 
@@ -329,8 +328,9 @@
         if (mIsShowingDashboard) {
             findViewById(R.id.search_bar).setVisibility(View.VISIBLE);
             findViewById(R.id.action_bar).setVisibility(View.GONE);
-            Toolbar toolbar = findViewById(R.id.search_action_bar);
-            toolbar.setOnClickListener(this);
+            final Toolbar toolbar = findViewById(R.id.search_action_bar);
+            FeatureFactory.getFactory(this).getSearchFeatureProvider()
+                    .initSearchToolbar(this, toolbar);
             setActionBar(toolbar);
 
             // Please forgive me for what I am about to do.
@@ -959,10 +959,4 @@
 
         return bitmap;
     }
-
-    @Override
-    public void onClick(View v) {
-        Intent intent = new Intent(this, SearchActivity.class);
-        startActivity(intent);
-    }
 }
diff --git a/src/com/android/settings/core/FeatureFlags.java b/src/com/android/settings/core/FeatureFlags.java
new file mode 100644
index 0000000..f3bf3e7
--- /dev/null
+++ b/src/com/android/settings/core/FeatureFlags.java
@@ -0,0 +1,28 @@
+/*
+ * 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.core;
+
+/**
+ * This class keeps track of all feature flags in Settings.
+ */
+public class FeatureFlags {
+    public static final String DEVICE_INFO_V2 = "device_info_v2";
+    public static final String DEV_OPTION_V1 = "dev_option_v1";
+    public static final String SEARCH_V2 = "settings_search_v2";
+    public static final String SUGGESTIONS_V2 = "new_settings_suggestion";
+    public static final String USE_PREFERENCE_SCREEN_TITLE = "settings_use_preference_screen_title";
+}
diff --git a/src/com/android/settings/core/InstrumentedPreferenceFragment.java b/src/com/android/settings/core/InstrumentedPreferenceFragment.java
index 5b95d66..31a0c27 100644
--- a/src/com/android/settings/core/InstrumentedPreferenceFragment.java
+++ b/src/com/android/settings/core/InstrumentedPreferenceFragment.java
@@ -18,7 +18,6 @@
 
 import android.content.Context;
 import android.os.Bundle;
-import android.support.annotation.VisibleForTesting;
 import android.support.annotation.XmlRes;
 import android.support.v7.preference.PreferenceScreen;
 import android.text.TextUtils;
@@ -39,9 +38,8 @@
         implements Instrumentable {
 
     private static final String TAG = "InstrumentedPrefFrag";
-    @VisibleForTesting
-    static final String FEATURE_FLAG_USE_PREFERENCE_SCREEN_TITLE =
-            "settings_use_preference_screen_title";
+
+
     protected MetricsFeatureProvider mMetricsFeatureProvider;
 
     // metrics placeholder value. Only use this for development.
@@ -85,7 +83,7 @@
     }
 
     public static boolean usePreferenceScreenTitle() {
-        return FeatureFlagUtils.isEnabled(FEATURE_FLAG_USE_PREFERENCE_SCREEN_TITLE) || true;
+        return FeatureFlagUtils.isEnabled(FeatureFlags.USE_PREFERENCE_SCREEN_TITLE) || true;
     }
 
     protected final Context getPrefContext() {
diff --git a/src/com/android/settings/dashboard/suggestions/SuggestionFeatureProviderImpl.java b/src/com/android/settings/dashboard/suggestions/SuggestionFeatureProviderImpl.java
index 1be31b4..14f0e2c 100644
--- a/src/com/android/settings/dashboard/suggestions/SuggestionFeatureProviderImpl.java
+++ b/src/com/android/settings/dashboard/suggestions/SuggestionFeatureProviderImpl.java
@@ -16,6 +16,8 @@
 
 package com.android.settings.dashboard.suggestions;
 
+import static com.android.settings.core.FeatureFlags.SUGGESTIONS_V2;
+
 import android.app.ActivityManager;
 import android.content.ComponentName;
 import android.content.ContentResolver;
@@ -62,8 +64,6 @@
     private static final int EXCLUSIVE_SUGGESTION_MAX_COUNT = 3;
 
     private static final String SHARED_PREF_FILENAME = "suggestions";
-    @VisibleForTesting
-    static final String FEATURE_FLAG_SUGGESTIONS_V2 = "new_settings_suggestion";
 
     private final SuggestionRanker mSuggestionRanker;
     private final MetricsFeatureProvider mMetricsFeatureProvider;
@@ -92,7 +92,7 @@
     }
 
     private static boolean isV2Enabled() {
-        return FeatureFlagUtils.isEnabled(FEATURE_FLAG_SUGGESTIONS_V2) || true;
+        return FeatureFlagUtils.isEnabled(SUGGESTIONS_V2) || true;
     }
 
     @Override
diff --git a/src/com/android/settings/deviceinfo/DeviceModelPreferenceController.java b/src/com/android/settings/deviceinfo/DeviceModelPreferenceController.java
index e7fab5a..5e7cd88 100644
--- a/src/com/android/settings/deviceinfo/DeviceModelPreferenceController.java
+++ b/src/com/android/settings/deviceinfo/DeviceModelPreferenceController.java
@@ -23,8 +23,8 @@
 import android.text.TextUtils;
 import android.util.FeatureFlagUtils;
 
-import com.android.settings.DeviceInfoSettings;
 import com.android.settings.R;
+import com.android.settings.core.FeatureFlags;
 import com.android.settings.core.PreferenceControllerMixin;
 import com.android.settingslib.DeviceInfoUtils;
 import com.android.settingslib.core.AbstractPreferenceController;
@@ -51,7 +51,7 @@
         super.displayPreference(screen);
         final Preference pref = screen.findPreference(KEY_DEVICE_MODEL);
         if (pref != null) {
-            if (FeatureFlagUtils.isEnabled(DeviceInfoSettings.DEVICE_INFO_V2_FEATURE_FLAG)) {
+            if (FeatureFlagUtils.isEnabled(FeatureFlags.DEVICE_INFO_V2)) {
                 pref.setSummary(mContext.getResources().getString(R.string.model_summary,
                         getDeviceModel()));
             } else {
diff --git a/src/com/android/settings/deviceinfo/HardwareInfoDialogFragment.java b/src/com/android/settings/deviceinfo/HardwareInfoDialogFragment.java
index 3d825b9..c57a4e0 100644
--- a/src/com/android/settings/deviceinfo/HardwareInfoDialogFragment.java
+++ b/src/com/android/settings/deviceinfo/HardwareInfoDialogFragment.java
@@ -29,8 +29,8 @@
 import android.widget.TextView;
 
 import com.android.internal.logging.nano.MetricsProto;
-import com.android.settings.DeviceInfoSettings;
 import com.android.settings.R;
+import com.android.settings.core.FeatureFlags;
 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
 
 public class HardwareInfoDialogFragment extends InstrumentedDialogFragment {
@@ -59,7 +59,7 @@
                 DeviceModelPreferenceController.getDeviceModel());
 
         // Serial number
-        if (FeatureFlagUtils.isEnabled(DeviceInfoSettings.DEVICE_INFO_V2_FEATURE_FLAG)) {
+        if (FeatureFlagUtils.isEnabled(FeatureFlags.DEVICE_INFO_V2)) {
             setText(content, R.id.serial_number_label, R.id.serial_number_value, getSerialNumber());
         } else {
             content.findViewById(R.id.serial_number_label).setVisibility(View.GONE);
@@ -73,7 +73,7 @@
         return builder.setView(content).create();
     }
 
-    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
+    @VisibleForTesting
     void setText(View content, int labelViewId, int valueViewId, String value) {
         if (content == null) {
             return;
diff --git a/src/com/android/settings/search/SearchFeatureProvider.java b/src/com/android/settings/search/SearchFeatureProvider.java
index 42afee9..d365ae5 100644
--- a/src/com/android/settings/search/SearchFeatureProvider.java
+++ b/src/com/android/settings/search/SearchFeatureProvider.java
@@ -19,9 +19,13 @@
 import android.annotation.NonNull;
 import android.content.ComponentName;
 import android.content.Context;
+import android.content.Intent;
+import android.util.FeatureFlagUtils;
 import android.util.Pair;
 import android.view.View;
+import android.widget.Toolbar;
 
+import com.android.settings.core.FeatureFlags;
 import com.android.settings.dashboard.SiteMapManager;
 
 import java.util.List;
@@ -164,4 +168,22 @@
     default FutureTask<List<Pair<String, Float>>> getRankerTask(Context context, String query) {
         return null;
     }
+
+    /**
+     * Initializes the search toolbar.
+     */
+    default void initSearchToolbar(Context context, Toolbar toolbar) {
+        if (context == null || toolbar == null) {
+            return;
+        }
+        toolbar.setOnClickListener(tb -> {
+            final Intent intent;
+            if (FeatureFlagUtils.isEnabled(FeatureFlags.SEARCH_V2)) {
+                intent = new Intent("com.android.settings.action.SETTINGS_SEARCH");
+            } else {
+                intent = new Intent(context, SearchActivity.class);
+            }
+            context.startActivity(intent);
+        });
+    }
 }