/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.util;
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import android.annotation.TestApi;
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import android.content.Context;
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import android.os.SystemProperties;
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import android.provider.Settings;
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import android.text.TextUtils;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* Util class to get feature flag information.
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*
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* @hide
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*/
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@TestApi
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public class FeatureFlagUtils {
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public static final String FFLAG_PREFIX = "sys.fflag.";
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public static final String FFLAG_OVERRIDE_PREFIX = FFLAG_PREFIX + "override.";
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public static final String PERSIST_PREFIX = "persist." + FFLAG_OVERRIDE_PREFIX;
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public static final String SEAMLESS_TRANSFER = "settings_seamless_transfer";
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public static final String HEARING_AID_SETTINGS = "settings_bluetooth_hearing_aid";
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public static final String SCREENRECORD_LONG_PRESS = "settings_screenrecord_long_press";
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public static final String PIXEL_WALLPAPER_CATEGORY_SWITCH =
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"settings_pixel_wallpaper_category_switch";
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public static final String DYNAMIC_SYSTEM = "settings_dynamic_system";
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private static final Map<String, String> DEFAULT_FLAGS;
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static {
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DEFAULT_FLAGS = new HashMap<>();
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DEFAULT_FLAGS.put("settings_audio_switcher", "true");
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DEFAULT_FLAGS.put("settings_mobile_network_v2", "true");
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DEFAULT_FLAGS.put("settings_network_and_internet_v2", "true");
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DEFAULT_FLAGS.put("settings_systemui_theme", "true");
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DEFAULT_FLAGS.put(DYNAMIC_SYSTEM, "false");
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DEFAULT_FLAGS.put(SEAMLESS_TRANSFER, "false");
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DEFAULT_FLAGS.put(HEARING_AID_SETTINGS, "false");
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DEFAULT_FLAGS.put(SCREENRECORD_LONG_PRESS, "false");
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DEFAULT_FLAGS.put(PIXEL_WALLPAPER_CATEGORY_SWITCH, "false");
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DEFAULT_FLAGS.put("settings_wifi_details_datausage_header", "false");
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}
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/**
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* Whether or not a flag is enabled.
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*
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* @param feature the flag name
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* @return true if the flag is enabled (either by default in system, or override by user)
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*/
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public static boolean isEnabled(Context context, String feature) {
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// Override precedence:
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// Settings.Global -> sys.fflag.override.* -> static list
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// Step 1: check if feature flag is set in Settings.Global.
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String value;
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if (context != null) {
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value = Settings.Global.getString(context.getContentResolver(), feature);
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if (!TextUtils.isEmpty(value)) {
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return Boolean.parseBoolean(value);
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}
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}
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// Step 2: check if feature flag has any override. Flag name: sys.fflag.override.<feature>
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value = SystemProperties.get(FFLAG_OVERRIDE_PREFIX + feature);
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if (!TextUtils.isEmpty(value)) {
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return Boolean.parseBoolean(value);
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}
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// Step 3: check if feature flag has any default value.
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value = getAllFeatureFlags().get(feature);
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return Boolean.parseBoolean(value);
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}
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/**
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* Override feature flag to new state.
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*/
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public static void setEnabled(Context context, String feature, boolean enabled) {
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SystemProperties.set(FFLAG_OVERRIDE_PREFIX + feature, enabled ? "true" : "false");
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}
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/**
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* Returns all feature flags in their raw form.
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*/
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public static Map<String, String> getAllFeatureFlags() {
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return DEFAULT_FLAGS;
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}
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}
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