Build.java revision e66763516a9c27c192adaba417616371a1c3c9bf 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.os;
18
19/**
20 * Information about the current build, extracted from system properties.
21 */
22public class Build {
23    /** Value used for when a build property is unknown. */
24    public static final String UNKNOWN = "unknown";
25
26    /** Either a changelist number, or a label like "M4-rc20". */
27    public static final String ID = getString("ro.build.id");
28
29    /** A build ID string meant for displaying to the user */
30    public static final String DISPLAY = getString("ro.build.display.id");
31
32    /** The name of the overall product. */
33    public static final String PRODUCT = getString("ro.product.name");
34
35    /** The name of the industrial design. */
36    public static final String DEVICE = getString("ro.product.device");
37
38    /** The name of the underlying board, like "goldfish". */
39    public static final String BOARD = getString("ro.product.board");
40
41    /** The name of the instruction set (CPU type + ABI convention) of native code. */
42    public static final String CPU_ABI = getString("ro.product.cpu.abi");
43
44    /** The name of the second instruction set (CPU type + ABI convention) of native code. */
45    public static final String CPU_ABI2 = getString("ro.product.cpu.abi2");
46
47    /** The manufacturer of the product/hardware. */
48    public static final String MANUFACTURER = getString("ro.product.manufacturer");
49
50    /** The brand (e.g., carrier) the software is customized for, if any. */
51    public static final String BRAND = getString("ro.product.brand");
52
53    /** The end-user-visible name for the end product. */
54    public static final String MODEL = getString("ro.product.model");
55
56    /** The system bootloader version number. */
57    public static final String BOOTLOADER = getString("ro.bootloader");
58
59    /** The radio firmware version number. */
60    public static final String RADIO = getString("gsm.version.baseband");
61
62    /** The name of the hardware (from the kernel command line or /proc). */
63    public static final String HARDWARE = getString("ro.hardware");
64
65    /** A hardware serial number, if available.  Alphanumeric only, case-insensitive. */
66    public static final String SERIAL = getString("ro.serialno");
67
68    /** Various version strings. */
69    public static class VERSION {
70        /**
71         * The internal value used by the underlying source control to
72         * represent this build.  E.g., a perforce changelist number
73         * or a git hash.
74         */
75        public static final String INCREMENTAL = getString("ro.build.version.incremental");
76
77        /**
78         * The user-visible version string.  E.g., "1.0" or "3.4b5".
79         */
80        public static final String RELEASE = getString("ro.build.version.release");
81
82        /**
83         * The user-visible SDK version of the framework in its raw String
84         * representation; use {@link #SDK_INT} instead.
85         *
86         * @deprecated Use {@link #SDK_INT} to easily get this as an integer.
87         */
88        @Deprecated
89        public static final String SDK = getString("ro.build.version.sdk");
90
91        /**
92         * The user-visible SDK version of the framework; its possible
93         * values are defined in {@link Build.VERSION_CODES}.
94         */
95        public static final int SDK_INT = SystemProperties.getInt(
96                "ro.build.version.sdk", 0);
97
98        /**
99         * The current development codename, or the string "REL" if this is
100         * a release build.
101         */
102        public static final String CODENAME = getString("ro.build.version.codename");
103
104        /**
105         * The SDK version to use when accessing resources.
106         * Use the current SDK version code.  If we are a development build,
107         * also allow the previous SDK version + 1.
108         * @hide
109         */
110        public static final int RESOURCES_SDK_INT = SDK_INT
111                + ("REL".equals(CODENAME) ? 0 : 1);
112    }
113
114    /**
115     * Enumeration of the currently known SDK version codes.  These are the
116     * values that can be found in {@link VERSION#SDK}.  Version numbers
117     * increment monotonically with each official platform release.
118     */
119    public static class VERSION_CODES {
120        /**
121         * Magic version number for a current development build, which has
122         * not yet turned into an official release.
123         */
124        public static final int CUR_DEVELOPMENT = 10000;
125
126        /**
127         * October 2008: The original, first, version of Android.  Yay!
128         */
129        public static final int BASE = 1;
130
131        /**
132         * February 2009: First Android update, officially called 1.1.
133         */
134        public static final int BASE_1_1 = 2;
135
136        /**
137         * May 2009: Android 1.5.
138         */
139        public static final int CUPCAKE = 3;
140
141        /**
142         * September 2009: Android 1.6.
143         *
144         * <p>Applications targeting this or a later release will get these
145         * new changes in behavior:</p>
146         * <ul>
147         * <li> They must explicitly request the
148         * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be
149         * able to modify the contents of the SD card.  (Apps targeting
150         * earlier versions will always request the permission.)
151         * <li> They must explicitly request the
152         * {@link android.Manifest.permission#READ_PHONE_STATE} permission to be
153         * able to be able to retrieve phone state info.  (Apps targeting
154         * earlier versions will always request the permission.)
155         * <li> They are assumed to support different screen densities and
156         * sizes.  (Apps targeting earlier versions are assumed to only support
157         * medium density normal size screens unless otherwise indicated).
158         * They can still explicitly specify screen support either way with the
159         * supports-screens manifest tag.
160         * </ul>
161         */
162        public static final int DONUT = 4;
163
164        /**
165         * November 2009: Android 2.0
166         *
167         * <p>Applications targeting this or a later release will get these
168         * new changes in behavior:</p>
169         * <ul>
170         * <li> The {@link android.app.Service#onStartCommand
171         * Service.onStartCommand} function will return the new
172         * {@link android.app.Service#START_STICKY} behavior instead of the
173         * old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}.
174         * <li> The {@link android.app.Activity} class will now execute back
175         * key presses on the key up instead of key down, to be able to detect
176         * canceled presses from virtual keys.
177         * <li> The {@link android.widget.TabWidget} class will use a new color scheme
178         * for tabs. In the new scheme, the foreground tab has a medium gray background
179         * the background tabs have a dark gray background.
180         * </ul>
181         */
182        public static final int ECLAIR = 5;
183
184        /**
185         * December 2009: Android 2.0.1
186         */
187        public static final int ECLAIR_0_1 = 6;
188
189        /**
190         * January 2010: Android 2.1
191         */
192        public static final int ECLAIR_MR1 = 7;
193
194        /**
195         * June 2010: Android 2.2
196         */
197        public static final int FROYO = 8;
198
199        /**
200         * November 2010: Android 2.3
201         */
202        public static final int GINGERBREAD = 9;
203
204        /**
205         * February 2011: Android 2.3.3.
206         */
207        public static final int GINGERBREAD_MR1 = 10;
208
209        /**
210         * February 2011: Android 3.0.
211         *
212         * <p>Applications targeting this or a later release will get these
213         * new changes in behavior:</p>
214         * <ul>
215         * <li> The default theme for applications is now dark holographic:
216         *      {@link android.R.style#Theme_Holo}.
217         * <li> The activity lifecycle has changed slightly as per
218         * {@link android.app.Activity}.
219         * <li> When an application requires a permission to access one of
220         * its components (activity, receiver, service, provider), this
221         * permission is no longer enforced when the application wants to
222         * access its own component.  This means it can require a permission
223         * on a component that it does not itself hold and still access that
224         * component.
225         * </ul>
226         */
227        public static final int HONEYCOMB = 11;
228
229        /**
230         * May 2011: Android 3.1.
231         */
232        public static final int HONEYCOMB_MR1 = 12;
233
234        /**
235         * Current development version.
236         *
237         * <p>Update to Honeycomb MR1 to support 7 inch tablets, improve
238         * screen compatibility mode, etc.</p>
239         *
240         * <p>As of this version, applications that don't say whether they
241         * support XLARGE screens will be assumed to do so only if they target
242         * {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or
243         * later.  Applications that don't support a screen size at least as
244         * large as the current screen will provide the user with a UI to
245         * switch them in to screen size compatibility mode.</p>
246         */
247        public static final int HONEYCOMB_MR2 = CUR_DEVELOPMENT;
248    }
249
250    /** The type of build, like "user" or "eng". */
251    public static final String TYPE = getString("ro.build.type");
252
253    /** Comma-separated tags describing the build, like "unsigned,debug". */
254    public static final String TAGS = getString("ro.build.tags");
255
256    /** A string that uniquely identifies this build.  Do not attempt to parse this value. */
257    public static final String FINGERPRINT = getString("ro.build.fingerprint");
258
259    // The following properties only make sense for internal engineering builds.
260    public static final long TIME = getLong("ro.build.date.utc") * 1000;
261    public static final String USER = getString("ro.build.user");
262    public static final String HOST = getString("ro.build.host");
263
264    private static String getString(String property) {
265        return SystemProperties.get(property, UNKNOWN);
266    }
267
268    private static long getLong(String property) {
269        try {
270            return Long.parseLong(SystemProperties.get(property));
271        } catch (NumberFormatException e) {
272            return -1;
273        }
274    }
275}
276