1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*
* 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 android.util;
import android.annotation.TestApi;
import android.content.Context;
import android.os.SystemProperties;
import android.provider.Settings;
import android.text.TextUtils;
import java.util.HashMap;
import java.util.Map;
/**
* Util class to get feature flag information.
*
* @hide
*/
@TestApi
public class FeatureFlagUtils {
public static final String FFLAG_PREFIX = "sys.fflag.";
public static final String FFLAG_OVERRIDE_PREFIX = FFLAG_PREFIX + "override.";
public static final String PERSIST_PREFIX = "persist." + FFLAG_OVERRIDE_PREFIX;
public static final String SEAMLESS_TRANSFER = "settings_seamless_transfer";
public static final String HEARING_AID_SETTINGS = "settings_bluetooth_hearing_aid";
public static final String SCREENRECORD_LONG_PRESS = "settings_screenrecord_long_press";
public static final String PIXEL_WALLPAPER_CATEGORY_SWITCH =
"settings_pixel_wallpaper_category_switch";
public static final String DYNAMIC_SYSTEM = "settings_dynamic_system";
private static final Map<String, String> DEFAULT_FLAGS;
static {
DEFAULT_FLAGS = new HashMap<>();
DEFAULT_FLAGS.put("settings_audio_switcher", "true");
DEFAULT_FLAGS.put("settings_mobile_network_v2", "true");
DEFAULT_FLAGS.put("settings_network_and_internet_v2", "true");
DEFAULT_FLAGS.put("settings_systemui_theme", "true");
DEFAULT_FLAGS.put(DYNAMIC_SYSTEM, "false");
DEFAULT_FLAGS.put(SEAMLESS_TRANSFER, "false");
DEFAULT_FLAGS.put(HEARING_AID_SETTINGS, "false");
DEFAULT_FLAGS.put(SCREENRECORD_LONG_PRESS, "false");
DEFAULT_FLAGS.put(PIXEL_WALLPAPER_CATEGORY_SWITCH, "false");
DEFAULT_FLAGS.put("settings_wifi_details_datausage_header", "false");
DEFAULT_FLAGS.put("settings_skip_direction_mutable", "true");
}
/**
* Whether or not a flag is enabled.
*
* @param feature the flag name
* @return true if the flag is enabled (either by default in system, or override by user)
*/
public static boolean isEnabled(Context context, String feature) {
// Override precedence:
// Settings.Global -> sys.fflag.override.* -> static list
// Step 1: check if feature flag is set in Settings.Global.
String value;
if (context != null) {
value = Settings.Global.getString(context.getContentResolver(), feature);
if (!TextUtils.isEmpty(value)) {
return Boolean.parseBoolean(value);
}
}
// Step 2: check if feature flag has any override. Flag name: sys.fflag.override.<feature>
value = SystemProperties.get(FFLAG_OVERRIDE_PREFIX + feature);
if (!TextUtils.isEmpty(value)) {
return Boolean.parseBoolean(value);
}
// Step 3: check if feature flag has any default value.
value = getAllFeatureFlags().get(feature);
return Boolean.parseBoolean(value);
}
/**
* Override feature flag to new state.
*/
public static void setEnabled(Context context, String feature, boolean enabled) {
SystemProperties.set(FFLAG_OVERRIDE_PREFIX + feature, enabled ? "true" : "false");
}
/**
* Returns all feature flags in their raw form.
*/
public static Map<String, String> getAllFeatureFlags() {
return DEFAULT_FLAGS;
}
}
|
