Build.java revision 6e90a362bc66cc67b1beae27b21d3f0148403b08 
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
19import com.android.internal.telephony.TelephonyProperties;
20
21/**
22 * Information about the current build, extracted from system properties.
23 */
24public class Build {
25    /** Value used for when a build property is unknown. */
26    public static final String UNKNOWN = "unknown";
27
28    /** Either a changelist number, or a label like "M4-rc20". */
29    public static final String ID = getString("ro.build.id");
30
31    /** A build ID string meant for displaying to the user */
32    public static final String DISPLAY = getString("ro.build.display.id");
33
34    /** The name of the overall product. */
35    public static final String PRODUCT = getString("ro.product.name");
36
37    /** The name of the industrial design. */
38    public static final String DEVICE = getString("ro.product.device");
39
40    /** The name of the underlying board, like "goldfish". */
41    public static final String BOARD = getString("ro.product.board");
42
43    /** The name of the instruction set (CPU type + ABI convention) of native code. */
44    public static final String CPU_ABI = getString("ro.product.cpu.abi");
45
46    /** The name of the second instruction set (CPU type + ABI convention) of native code. */
47    public static final String CPU_ABI2 = getString("ro.product.cpu.abi2");
48
49    /** The manufacturer of the product/hardware. */
50    public static final String MANUFACTURER = getString("ro.product.manufacturer");
51
52    /** The brand (e.g., carrier) the software is customized for, if any. */
53    public static final String BRAND = getString("ro.product.brand");
54
55    /** The end-user-visible name for the end product. */
56    public static final String MODEL = getString("ro.product.model");
57
58    /** The system bootloader version number. */
59    public static final String BOOTLOADER = getString("ro.bootloader");
60
61    /**
62     * The radio firmware version number.
63     *
64     * @deprecated The radio firmware version is frequently not
65     * available when this class is initialized, leading to a blank or
66     * "unknown" value for this string.  Use
67     * {@link #getRadioVersion} instead.
68     */
69    @Deprecated
70    public static final String RADIO = getString(TelephonyProperties.PROPERTY_BASEBAND_VERSION);
71
72    /** The name of the hardware (from the kernel command line or /proc). */
73    public static final String HARDWARE = getString("ro.hardware");
74
75    /** A hardware serial number, if available.  Alphanumeric only, case-insensitive. */
76    public static final String SERIAL = getString("ro.serialno");
77
78    /** Various version strings. */
79    public static class VERSION {
80        /**
81         * The internal value used by the underlying source control to
82         * represent this build.  E.g., a perforce changelist number
83         * or a git hash.
84         */
85        public static final String INCREMENTAL = getString("ro.build.version.incremental");
86
87        /**
88         * The user-visible version string.  E.g., "1.0" or "3.4b5".
89         */
90        public static final String RELEASE = getString("ro.build.version.release");
91
92        /**
93         * The user-visible SDK version of the framework in its raw String
94         * representation; use {@link #SDK_INT} instead.
95         *
96         * @deprecated Use {@link #SDK_INT} to easily get this as an integer.
97         */
98        @Deprecated
99        public static final String SDK = getString("ro.build.version.sdk");
100
101        /**
102         * The user-visible SDK version of the framework; its possible
103         * values are defined in {@link Build.VERSION_CODES}.
104         */
105        public static final int SDK_INT = SystemProperties.getInt(
106                "ro.build.version.sdk", 0);
107
108        /**
109         * The current development codename, or the string "REL" if this is
110         * a release build.
111         */
112        public static final String CODENAME = getString("ro.build.version.codename");
113
114        /**
115         * The SDK version to use when accessing resources.
116         * Use the current SDK version code.  If we are a development build,
117         * also allow the previous SDK version + 1.
118         * @hide
119         */
120        public static final int RESOURCES_SDK_INT = SDK_INT
121                + ("REL".equals(CODENAME) ? 0 : 1);
122    }
123
124    /**
125     * Enumeration of the currently known SDK version codes.  These are the
126     * values that can be found in {@link VERSION#SDK}.  Version numbers
127     * increment monotonically with each official platform release.
128     */
129    public static class VERSION_CODES {
130        /**
131         * Magic version number for a current development build, which has
132         * not yet turned into an official release.
133         */
134        public static final int CUR_DEVELOPMENT = 10000;
135
136        /**
137         * October 2008: The original, first, version of Android.  Yay!
138         */
139        public static final int BASE = 1;
140
141        /**
142         * February 2009: First Android update, officially called 1.1.
143         */
144        public static final int BASE_1_1 = 2;
145
146        /**
147         * May 2009: Android 1.5.
148         */
149        public static final int CUPCAKE = 3;
150
151        /**
152         * September 2009: Android 1.6.
153         *
154         * <p>Applications targeting this or a later release will get these
155         * new changes in behavior:</p>
156         * <ul>
157         * <li> They must explicitly request the
158         * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be
159         * able to modify the contents of the SD card.  (Apps targeting
160         * earlier versions will always request the permission.)
161         * <li> They must explicitly request the
162         * {@link android.Manifest.permission#READ_PHONE_STATE} permission to be
163         * able to be able to retrieve phone state info.  (Apps targeting
164         * earlier versions will always request the permission.)
165         * <li> They are assumed to support different screen densities and
166         * sizes.  (Apps targeting earlier versions are assumed to only support
167         * medium density normal size screens unless otherwise indicated).
168         * They can still explicitly specify screen support either way with the
169         * supports-screens manifest tag.
170         * </ul>
171         */
172        public static final int DONUT = 4;
173
174        /**
175         * November 2009: Android 2.0
176         *
177         * <p>Applications targeting this or a later release will get these
178         * new changes in behavior:</p>
179         * <ul>
180         * <li> The {@link android.app.Service#onStartCommand
181         * Service.onStartCommand} function will return the new
182         * {@link android.app.Service#START_STICKY} behavior instead of the
183         * old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}.
184         * <li> The {@link android.app.Activity} class will now execute back
185         * key presses on the key up instead of key down, to be able to detect
186         * canceled presses from virtual keys.
187         * <li> The {@link android.widget.TabWidget} class will use a new color scheme
188         * for tabs. In the new scheme, the foreground tab has a medium gray background
189         * the background tabs have a dark gray background.
190         * </ul>
191         */
192        public static final int ECLAIR = 5;
193
194        /**
195         * December 2009: Android 2.0.1
196         */
197        public static final int ECLAIR_0_1 = 6;
198
199        /**
200         * January 2010: Android 2.1
201         */
202        public static final int ECLAIR_MR1 = 7;
203
204        /**
205         * June 2010: Android 2.2
206         */
207        public static final int FROYO = 8;
208
209        /**
210         * November 2010: Android 2.3
211         */
212        public static final int GINGERBREAD = 9;
213
214        /**
215         * February 2011: Android 2.3.3.
216         */
217        public static final int GINGERBREAD_MR1 = 10;
218
219        /**
220         * February 2011: Android 3.0.
221         *
222         * <p>Applications targeting this or a later release will get these
223         * new changes in behavior:</p>
224         * <ul>
225         * <li> The default theme for applications is now dark holographic:
226         *      {@link android.R.style#Theme_Holo}.
227         * <li> The activity lifecycle has changed slightly as per
228         * {@link android.app.Activity}.
229         * <li> When an application requires a permission to access one of
230         * its components (activity, receiver, service, provider), this
231         * permission is no longer enforced when the application wants to
232         * access its own component.  This means it can require a permission
233         * on a component that it does not itself hold and still access that
234         * component.
235         * </ul>
236         */
237        public static final int HONEYCOMB = 11;
238
239        /**
240         * May 2011: Android 3.1.
241         */
242        public static final int HONEYCOMB_MR1 = 12;
243
244        /**
245         * June 2011: Android 3.2.
246         *
247         * <p>Update to Honeycomb MR1 to support 7 inch tablets, improve
248         * screen compatibility mode, etc.</p>
249         *
250         * <p>As of this version, applications that don't say whether they
251         * support XLARGE screens will be assumed to do so only if they target
252         * {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or
253         * later.  Applications that don't support a screen size at least as
254         * large as the current screen will provide the user with a UI to
255         * switch them in to screen size compatibility mode.</p>
256         *
257         * <p>This version introduces new screen size resource qualifiers
258         * based on the screen size in dp: see
259         * {@link android.content.res.Configuration#screenWidthDp},
260         * {@link android.content.res.Configuration#screenHeightDp}, and
261         * {@link android.content.res.Configuration#smallestScreenWidthDp}.
262         * Supplying these in &lt;supports-screens&gt; as per
263         * {@link android.content.pm.ApplicationInfo#requiresSmallestWidthDp},
264         * {@link android.content.pm.ApplicationInfo#compatibleWidthLimitDp}, and
265         * {@link android.content.pm.ApplicationInfo#largestWidthLimitDp} is
266         * preferred over the older screen size buckets and for older devices
267         * the appropriate buckets will be inferred from them.</p>
268         *
269         * <p>New {@link android.content.pm.PackageManager#FEATURE_SCREEN_PORTRAIT}
270         * and {@link android.content.pm.PackageManager#FEATURE_SCREEN_LANDSCAPE}
271         * features are introduced in this release.  Applications that target
272         * previous platform versions are assumed to require both portrait and
273         * landscape support in the device; when targeting Honeycomb MR1 or
274         * greater the application is responsible for specifying any specific
275         * orientation it requires.</p>
276         */
277        public static final int HONEYCOMB_MR2 = 13;
278
279        /**
280         * Current version under development.
281         *
282         * <p>Applications targeting this or a later release will get these
283         * new changes in behavior:</p>
284         * <ul>
285         * <li> 2d drawing hardware acceleration is now turned on by default.
286         * You can use
287         * {@link android.R.attr#hardwareAccelerated android:hardwareAccelerated}
288         * to turn it off if needed, although this is strongly discouraged since
289         * it will result in poor performance on larger screen devices.
290         * <li> The default theme for applications is now the "device default" theme:
291         *      {@link android.R.style#Theme_DeviceDefault}. This may be the
292         *      holo dark theme or a different dark theme defined by the specific device.
293         *      The {@link android.R.style#Theme_Holo} family must not be modified
294         *      for a device to be considered compatible. Applications that explicitly
295         *      request a theme from the Holo family will be guaranteed that these themes
296         *      will not change character within the same platform version. Applications
297         *      that wish to blend in with the device should use a theme from the
298         *      {@link android.R.style#Theme_DeviceDefault} family.
299         * </ul>
300         */
301        public static final int ICE_CREAM_SANDWICH = CUR_DEVELOPMENT;
302    }
303
304    /** The type of build, like "user" or "eng". */
305    public static final String TYPE = getString("ro.build.type");
306
307    /** Comma-separated tags describing the build, like "unsigned,debug". */
308    public static final String TAGS = getString("ro.build.tags");
309
310    /** A string that uniquely identifies this build.  Do not attempt to parse this value. */
311    public static final String FINGERPRINT = getString("ro.build.fingerprint");
312
313    // The following properties only make sense for internal engineering builds.
314    public static final long TIME = getLong("ro.build.date.utc") * 1000;
315    public static final String USER = getString("ro.build.user");
316    public static final String HOST = getString("ro.build.host");
317
318    /**
319     * Returns the version string for the radio firmware.  May return
320     * null (if, for instance, the radio is not currently on).
321     */
322    public static String getRadioVersion() {
323        return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null);
324    }
325
326    private static String getString(String property) {
327        return SystemProperties.get(property, UNKNOWN);
328    }
329
330    private static long getLong(String property) {
331        try {
332            return Long.parseLong(SystemProperties.get(property));
333        } catch (NumberFormatException e) {
334            return -1;
335        }
336    }
337}
338