Build.java revision 0f206a149d27385ef092a34e0009a8607d663659
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 android.text.TextUtils;
20import android.util.Slog;
21
22import com.android.internal.telephony.TelephonyProperties;
23
24/**
25 * Information about the current build, extracted from system properties.
26 */
27public class Build {
28    private static final String TAG = "Build";
29
30    /** Value used for when a build property is unknown. */
31    public static final String UNKNOWN = "unknown";
32
33    /** Either a changelist number, or a label like "M4-rc20". */
34    public static final String ID = getString("ro.build.id");
35
36    /** A build ID string meant for displaying to the user */
37    public static final String DISPLAY = getString("ro.build.display.id");
38
39    /** The name of the overall product. */
40    public static final String PRODUCT = getString("ro.product.name");
41
42    /** The name of the industrial design. */
43    public static final String DEVICE = getString("ro.product.device");
44
45    /** The name of the underlying board, like "goldfish". */
46    public static final String BOARD = getString("ro.product.board");
47
48    /** The name of the instruction set (CPU type + ABI convention) of native code. */
49    public static final String CPU_ABI = getString("ro.product.cpu.abi");
50
51    /** The name of the second instruction set (CPU type + ABI convention) of native code. */
52    public static final String CPU_ABI2 = getString("ro.product.cpu.abi2");
53
54    /** The manufacturer of the product/hardware. */
55    public static final String MANUFACTURER = getString("ro.product.manufacturer");
56
57    /** The consumer-visible brand with which the product/hardware will be associated, if any. */
58    public static final String BRAND = getString("ro.product.brand");
59
60    /** The end-user-visible name for the end product. */
61    public static final String MODEL = getString("ro.product.model");
62
63    /** The system bootloader version number. */
64    public static final String BOOTLOADER = getString("ro.bootloader");
65
66    /**
67     * The radio firmware version number.
68     *
69     * @deprecated The radio firmware version is frequently not
70     * available when this class is initialized, leading to a blank or
71     * "unknown" value for this string.  Use
72     * {@link #getRadioVersion} instead.
73     */
74    @Deprecated
75    public static final String RADIO = getString(TelephonyProperties.PROPERTY_BASEBAND_VERSION);
76
77    /** The name of the hardware (from the kernel command line or /proc). */
78    public static final String HARDWARE = getString("ro.hardware");
79
80    /** A hardware serial number, if available.  Alphanumeric only, case-insensitive. */
81    public static final String SERIAL = getString("ro.serialno");
82
83    /**
84     * An ordered list of ABIs supported by this device. The most preferred ABI is the first
85     * element in the list.
86     *
87     * See {@link #SUPPORTED_32_BIT_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}.
88     *
89     * @hide
90     */
91    public static final String[] SUPPORTED_ABIS = getString("ro.product.cpu.abilist").split(",");
92
93    /**
94     * An ordered list of <b>32 bit</b> ABIs supported by this device. The most preferred ABI
95     * is the first element in the list.
96     *
97     * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}.
98     *
99     * @hide
100     */
101    public static final String[] SUPPORTED_32_BIT_ABIS = getString("ro.product.cpu.abilist32")
102            .split(",");
103
104    /**
105     * An ordered list of <b>64 bit</b> ABIs supported by this device. The most preferred ABI
106     * is the first element in the list.
107     *
108     * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_32_BIT_ABIS}.
109     *
110     * @hide
111     */
112    public static final String[] SUPPORTED_64_BIT_ABIS = getString("ro.product.cpu.abilist64")
113            .split(",");
114
115
116    /** Various version strings. */
117    public static class VERSION {
118        /**
119         * The internal value used by the underlying source control to
120         * represent this build.  E.g., a perforce changelist number
121         * or a git hash.
122         */
123        public static final String INCREMENTAL = getString("ro.build.version.incremental");
124
125        /**
126         * The user-visible version string.  E.g., "1.0" or "3.4b5".
127         */
128        public static final String RELEASE = getString("ro.build.version.release");
129
130        /**
131         * The user-visible SDK version of the framework in its raw String
132         * representation; use {@link #SDK_INT} instead.
133         *
134         * @deprecated Use {@link #SDK_INT} to easily get this as an integer.
135         */
136        @Deprecated
137        public static final String SDK = getString("ro.build.version.sdk");
138
139        /**
140         * The user-visible SDK version of the framework; its possible
141         * values are defined in {@link Build.VERSION_CODES}.
142         */
143        public static final int SDK_INT = SystemProperties.getInt(
144                "ro.build.version.sdk", 0);
145
146        /**
147         * The current development codename, or the string "REL" if this is
148         * a release build.
149         */
150        public static final String CODENAME = getString("ro.build.version.codename");
151
152        private static final String[] ALL_CODENAMES
153                = getString("ro.build.version.all_codenames").split(",");
154
155        /**
156         * @hide
157         */
158        public static final String[] ACTIVE_CODENAMES = "REL".equals(ALL_CODENAMES[0])
159                ? new String[0] : ALL_CODENAMES;
160
161        /**
162         * The SDK version to use when accessing resources.
163         * Use the current SDK version code.  For every active development codename
164         * we are operating under, we bump the assumed resource platform version by 1.
165         * @hide
166         */
167        public static final int RESOURCES_SDK_INT = SDK_INT + ACTIVE_CODENAMES.length;
168    }
169
170    /**
171     * Enumeration of the currently known SDK version codes.  These are the
172     * values that can be found in {@link VERSION#SDK}.  Version numbers
173     * increment monotonically with each official platform release.
174     */
175    public static class VERSION_CODES {
176        /**
177         * Magic version number for a current development build, which has
178         * not yet turned into an official release.
179         */
180        public static final int CUR_DEVELOPMENT = 10000;
181
182        /**
183         * October 2008: The original, first, version of Android.  Yay!
184         */
185        public static final int BASE = 1;
186
187        /**
188         * February 2009: First Android update, officially called 1.1.
189         */
190        public static final int BASE_1_1 = 2;
191
192        /**
193         * May 2009: Android 1.5.
194         */
195        public static final int CUPCAKE = 3;
196
197        /**
198         * September 2009: Android 1.6.
199         *
200         * <p>Applications targeting this or a later release will get these
201         * new changes in behavior:</p>
202         * <ul>
203         * <li> They must explicitly request the
204         * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be
205         * able to modify the contents of the SD card.  (Apps targeting
206         * earlier versions will always request the permission.)
207         * <li> They must explicitly request the
208         * {@link android.Manifest.permission#READ_PHONE_STATE} permission to be
209         * able to be able to retrieve phone state info.  (Apps targeting
210         * earlier versions will always request the permission.)
211         * <li> They are assumed to support different screen densities and
212         * sizes.  (Apps targeting earlier versions are assumed to only support
213         * medium density normal size screens unless otherwise indicated).
214         * They can still explicitly specify screen support either way with the
215         * supports-screens manifest tag.
216         * <li> {@link android.widget.TabHost} will use the new dark tab
217         * background design.
218         * </ul>
219         */
220        public static final int DONUT = 4;
221
222        /**
223         * November 2009: Android 2.0
224         *
225         * <p>Applications targeting this or a later release will get these
226         * new changes in behavior:</p>
227         * <ul>
228         * <li> The {@link android.app.Service#onStartCommand
229         * Service.onStartCommand} function will return the new
230         * {@link android.app.Service#START_STICKY} behavior instead of the
231         * old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}.
232         * <li> The {@link android.app.Activity} class will now execute back
233         * key presses on the key up instead of key down, to be able to detect
234         * canceled presses from virtual keys.
235         * <li> The {@link android.widget.TabWidget} class will use a new color scheme
236         * for tabs. In the new scheme, the foreground tab has a medium gray background
237         * the background tabs have a dark gray background.
238         * </ul>
239         */
240        public static final int ECLAIR = 5;
241
242        /**
243         * December 2009: Android 2.0.1
244         */
245        public static final int ECLAIR_0_1 = 6;
246
247        /**
248         * January 2010: Android 2.1
249         */
250        public static final int ECLAIR_MR1 = 7;
251
252        /**
253         * June 2010: Android 2.2
254         */
255        public static final int FROYO = 8;
256
257        /**
258         * November 2010: Android 2.3
259         *
260         * <p>Applications targeting this or a later release will get these
261         * new changes in behavior:</p>
262         * <ul>
263         * <li> The application's notification icons will be shown on the new
264         * dark status bar background, so must be visible in this situation.
265         * </ul>
266         */
267        public static final int GINGERBREAD = 9;
268
269        /**
270         * February 2011: Android 2.3.3.
271         */
272        public static final int GINGERBREAD_MR1 = 10;
273
274        /**
275         * February 2011: Android 3.0.
276         *
277         * <p>Applications targeting this or a later release will get these
278         * new changes in behavior:</p>
279         * <ul>
280         * <li> The default theme for applications is now dark holographic:
281         *      {@link android.R.style#Theme_Holo}.
282         * <li> On large screen devices that do not have a physical menu
283         * button, the soft (compatibility) menu is disabled.
284         * <li> The activity lifecycle has changed slightly as per
285         * {@link android.app.Activity}.
286         * <li> An application will crash if it does not call through
287         * to the super implementation of its
288         * {@link android.app.Activity#onPause Activity.onPause()} method.
289         * <li> When an application requires a permission to access one of
290         * its components (activity, receiver, service, provider), this
291         * permission is no longer enforced when the application wants to
292         * access its own component.  This means it can require a permission
293         * on a component that it does not itself hold and still access that
294         * component.
295         * <li> {@link android.content.Context#getSharedPreferences
296         * Context.getSharedPreferences()} will not automatically reload
297         * the preferences if they have changed on storage, unless
298         * {@link android.content.Context#MODE_MULTI_PROCESS} is used.
299         * <li> {@link android.view.ViewGroup#setMotionEventSplittingEnabled}
300         * will default to true.
301         * <li> {@link android.view.WindowManager.LayoutParams#FLAG_SPLIT_TOUCH}
302         * is enabled by default on windows.
303         * <li> {@link android.widget.PopupWindow#isSplitTouchEnabled()
304         * PopupWindow.isSplitTouchEnabled()} will return true by default.
305         * <li> {@link android.widget.GridView} and {@link android.widget.ListView}
306         * will use {@link android.view.View#setActivated View.setActivated}
307         * for selected items if they do not implement {@link android.widget.Checkable}.
308         * <li> {@link android.widget.Scroller} will be constructed with
309         * "flywheel" behavior enabled by default.
310         * </ul>
311         */
312        public static final int HONEYCOMB = 11;
313
314        /**
315         * May 2011: Android 3.1.
316         */
317        public static final int HONEYCOMB_MR1 = 12;
318
319        /**
320         * June 2011: Android 3.2.
321         *
322         * <p>Update to Honeycomb MR1 to support 7 inch tablets, improve
323         * screen compatibility mode, etc.</p>
324         *
325         * <p>As of this version, applications that don't say whether they
326         * support XLARGE screens will be assumed to do so only if they target
327         * {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or
328         * later.  Applications that don't support a screen size at least as
329         * large as the current screen will provide the user with a UI to
330         * switch them in to screen size compatibility mode.</p>
331         *
332         * <p>This version introduces new screen size resource qualifiers
333         * based on the screen size in dp: see
334         * {@link android.content.res.Configuration#screenWidthDp},
335         * {@link android.content.res.Configuration#screenHeightDp}, and
336         * {@link android.content.res.Configuration#smallestScreenWidthDp}.
337         * Supplying these in &lt;supports-screens&gt; as per
338         * {@link android.content.pm.ApplicationInfo#requiresSmallestWidthDp},
339         * {@link android.content.pm.ApplicationInfo#compatibleWidthLimitDp}, and
340         * {@link android.content.pm.ApplicationInfo#largestWidthLimitDp} is
341         * preferred over the older screen size buckets and for older devices
342         * the appropriate buckets will be inferred from them.</p>
343         *
344         * <p>Applications targeting this or a later release will get these
345         * new changes in behavior:</p>
346         * <ul>
347         * <li><p>New {@link android.content.pm.PackageManager#FEATURE_SCREEN_PORTRAIT}
348         * and {@link android.content.pm.PackageManager#FEATURE_SCREEN_LANDSCAPE}
349         * features were introduced in this release.  Applications that target
350         * previous platform versions are assumed to require both portrait and
351         * landscape support in the device; when targeting Honeycomb MR1 or
352         * greater the application is responsible for specifying any specific
353         * orientation it requires.</p>
354         * <li><p>{@link android.os.AsyncTask} will use the serial executor
355         * by default when calling {@link android.os.AsyncTask#execute}.</p>
356         * <li><p>{@link android.content.pm.ActivityInfo#configChanges
357         * ActivityInfo.configChanges} will have the
358         * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE} and
359         * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE}
360         * bits set; these need to be cleared for older applications because
361         * some developers have done absolute comparisons against this value
362         * instead of correctly masking the bits they are interested in.
363         * </ul>
364         */
365        public static final int HONEYCOMB_MR2 = 13;
366
367        /**
368         * October 2011: Android 4.0.
369         *
370         * <p>Applications targeting this or a later release will get these
371         * new changes in behavior:</p>
372         * <ul>
373         * <li> For devices without a dedicated menu key, the software compatibility
374         * menu key will not be shown even on phones.  By targeting Ice Cream Sandwich
375         * or later, your UI must always have its own menu UI affordance if needed,
376         * on both tablets and phones.  The ActionBar will take care of this for you.
377         * <li> 2d drawing hardware acceleration is now turned on by default.
378         * You can use
379         * {@link android.R.attr#hardwareAccelerated android:hardwareAccelerated}
380         * to turn it off if needed, although this is strongly discouraged since
381         * it will result in poor performance on larger screen devices.
382         * <li> The default theme for applications is now the "device default" theme:
383         *      {@link android.R.style#Theme_DeviceDefault}. This may be the
384         *      holo dark theme or a different dark theme defined by the specific device.
385         *      The {@link android.R.style#Theme_Holo} family must not be modified
386         *      for a device to be considered compatible. Applications that explicitly
387         *      request a theme from the Holo family will be guaranteed that these themes
388         *      will not change character within the same platform version. Applications
389         *      that wish to blend in with the device should use a theme from the
390         *      {@link android.R.style#Theme_DeviceDefault} family.
391         * <li> Managed cursors can now throw an exception if you directly close
392         * the cursor yourself without stopping the management of it; previously failures
393         * would be silently ignored.
394         * <li> The fadingEdge attribute on views will be ignored (fading edges is no
395         * longer a standard part of the UI).  A new requiresFadingEdge attribute allows
396         * applications to still force fading edges on for special cases.
397         * <li> {@link android.content.Context#bindService Context.bindService()}
398         * will not automatically add in {@link android.content.Context#BIND_WAIVE_PRIORITY}.
399         * <li> App Widgets will have standard padding automatically added around
400         * them, rather than relying on the padding being baked into the widget itself.
401         * <li> An exception will be thrown if you try to change the type of a
402         * window after it has been added to the window manager.  Previously this
403         * would result in random incorrect behavior.
404         * <li> {@link android.view.animation.AnimationSet} will parse out
405         * the duration, fillBefore, fillAfter, repeatMode, and startOffset
406         * XML attributes that are defined.
407         * <li> {@link android.app.ActionBar#setHomeButtonEnabled
408         * ActionBar.setHomeButtonEnabled()} is false by default.
409         * </ul>
410         */
411        public static final int ICE_CREAM_SANDWICH = 14;
412
413        /**
414         * December 2011: Android 4.0.3.
415         */
416        public static final int ICE_CREAM_SANDWICH_MR1 = 15;
417
418        /**
419         * June 2012: Android 4.1.
420         *
421         * <p>Applications targeting this or a later release will get these
422         * new changes in behavior:</p>
423         * <ul>
424         * <li> You must explicitly request the {@link android.Manifest.permission#READ_CALL_LOG}
425         * and/or {@link android.Manifest.permission#WRITE_CALL_LOG} permissions;
426         * access to the call log is no longer implicitly provided through
427         * {@link android.Manifest.permission#READ_CONTACTS} and
428         * {@link android.Manifest.permission#WRITE_CONTACTS}.
429         * <li> {@link android.widget.RemoteViews} will throw an exception if
430         * setting an onClick handler for views being generated by a
431         * {@link android.widget.RemoteViewsService} for a collection container;
432         * previously this just resulted in a warning log message.
433         * <li> New {@link android.app.ActionBar} policy for embedded tabs:
434         * embedded tabs are now always stacked in the action bar when in portrait
435         * mode, regardless of the size of the screen.
436         * <li> {@link android.webkit.WebSettings#setAllowFileAccessFromFileURLs(boolean)
437         * WebSettings.setAllowFileAccessFromFileURLs} and
438         * {@link android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs(boolean)
439         * WebSettings.setAllowUniversalAccessFromFileURLs} default to false.
440         * <li> Calls to {@link android.content.pm.PackageManager#setComponentEnabledSetting
441         * PackageManager.setComponentEnabledSetting} will now throw an
442         * IllegalArgumentException if the given component class name does not
443         * exist in the application's manifest.
444         * <li> {@link android.nfc.NfcAdapter#setNdefPushMessage
445         * NfcAdapter.setNdefPushMessage},
446         * {@link android.nfc.NfcAdapter#setNdefPushMessageCallback
447         * NfcAdapter.setNdefPushMessageCallback} and
448         * {@link android.nfc.NfcAdapter#setOnNdefPushCompleteCallback
449         * NfcAdapter.setOnNdefPushCompleteCallback} will throw
450         * IllegalStateException if called after the Activity has been destroyed.
451         * <li> Accessibility services must require the new
452         * {@link android.Manifest.permission#BIND_ACCESSIBILITY_SERVICE} permission or
453         * they will not be available for use.
454         * <li> {@link android.accessibilityservice.AccessibilityServiceInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS
455         * AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS} must be set
456         * for unimportant views to be included in queries.
457         * </ul>
458         */
459        public static final int JELLY_BEAN = 16;
460
461        /**
462         * Android 4.2: Moar jelly beans!
463         *
464         * <p>Applications targeting this or a later release will get these
465         * new changes in behavior:</p>
466         * <ul>
467         * <li>Content Providers: The default value of {@code android:exported} is now
468         * {@code false}. See
469         * <a href="{@docRoot}guide/topics/manifest/provider-element.html#exported">
470         * the android:exported section</a> in the provider documentation for more details.</li>
471         * <li>{@link android.view.View#getLayoutDirection() View.getLayoutDirection()}
472         * can return different values than {@link android.view.View#LAYOUT_DIRECTION_LTR}
473         * based on the locale etc.
474         * <li> {@link android.webkit.WebView#addJavascriptInterface(Object, String)
475         * WebView.addJavascriptInterface} requires explicit annotations on methods
476         * for them to be accessible from Javascript.
477         * </ul>
478         */
479        public static final int JELLY_BEAN_MR1 = 17;
480
481        /**
482         * Android 4.3: Jelly Bean MR2, the revenge of the beans.
483         */
484        public static final int JELLY_BEAN_MR2 = 18;
485
486        /**
487         * Android 4.4: KitKat, another tasty treat.
488         *
489         * <p>Applications targeting this or a later release will get these
490         * new changes in behavior:</p>
491         * <ul>
492         * <li> The default result of {android.preference.PreferenceActivity#isValidFragment
493         * PreferenceActivity.isValueFragment} becomes false instead of true.</li>
494         * <li> In {@link android.webkit.WebView}, apps targeting earlier versions will have
495         * JS URLs evaluated directly and any result of the evaluation will not replace
496         * the current page content.  Apps targetting KITKAT or later that load a JS URL will
497         * have the result of that URL replace the content of the current page</li>
498         * <li> {@link android.app.AlarmManager#set AlarmManager.set} becomes interpreted as
499         * an inexact value, to give the system more flexibility in scheduling alarms.</li>
500         * <li> {@link android.content.Context#getSharedPreferences(String, int)
501         * Context.getSharedPreferences} no longer allows a null name.</li>
502         * <li> {@link android.widget.RelativeLayout} changes to compute wrapped content
503         * margins correctly.</li>
504         * <li> {@link android.app.ActionBar}'s window content overlay is allowed to be
505         * drawn.</li>
506         * <li>The {@link android.Manifest.permission#READ_EXTERNAL_STORAGE}
507         * permission is now always enforced.</li>
508         * <li>Access to package-specific external storage directories belonging
509         * to the calling app no longer requires the
510         * {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} or
511         * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE}
512         * permissions.</li>
513         * </ul>
514         */
515        public static final int KITKAT = 19;
516
517        /**
518         * Android 4.5: KitKat for watches, snacks on the run.
519         */
520        public static final int KITKAT_WATCH = CUR_DEVELOPMENT; // STOPSHIP: update API level
521
522        /**
523         * L!
524         *
525         * <p>Applications targeting this or a later release will get these
526         * new changes in behavior:</p>
527         * <ul>
528         * <li> {@link android.content.Context#bindService Context.bindService} now
529         * requires an explicit Intent, and will throw an exception if given an implicit
530         * Intent.</li>
531         * </ul>
532         */
533        public static final int L = CUR_DEVELOPMENT;
534    }
535
536    /** The type of build, like "user" or "eng". */
537    public static final String TYPE = getString("ro.build.type");
538
539    /** Comma-separated tags describing the build, like "unsigned,debug". */
540    public static final String TAGS = getString("ro.build.tags");
541
542    /** A string that uniquely identifies this build.  Do not attempt to parse this value. */
543    public static final String FINGERPRINT = deriveFingerprint();
544
545    /**
546     * Some devices split the fingerprint components between multiple
547     * partitions, so we might derive the fingerprint at runtime.
548     */
549    private static String deriveFingerprint() {
550        String finger = SystemProperties.get("ro.build.fingerprint");
551        if (TextUtils.isEmpty(finger)) {
552            finger = getString("ro.product.brand") + '/' +
553                    getString("ro.product.name") + '/' +
554                    getString("ro.product.device") + ':' +
555                    getString("ro.build.version.release") + '/' +
556                    getString("ro.build.id") + '/' +
557                    getString("ro.build.version.incremental") + ':' +
558                    getString("ro.build.type") + '/' +
559                    getString("ro.build.tags");
560        }
561        return finger;
562    }
563
564    /**
565     * Ensure that raw fingerprint system property is defined. If it was derived
566     * dynamically by {@link #deriveFingerprint()} this is where we push the
567     * derived value into the property service.
568     *
569     * @hide
570     */
571    public static void ensureFingerprintProperty() {
572        if (TextUtils.isEmpty(SystemProperties.get("ro.build.fingerprint"))) {
573            try {
574                SystemProperties.set("ro.build.fingerprint", FINGERPRINT);
575            } catch (IllegalArgumentException e) {
576                Slog.e(TAG, "Failed to set fingerprint property", e);
577            }
578        }
579    }
580
581    // The following properties only make sense for internal engineering builds.
582    public static final long TIME = getLong("ro.build.date.utc") * 1000;
583    public static final String USER = getString("ro.build.user");
584    public static final String HOST = getString("ro.build.host");
585
586    /**
587     * Returns true if we are running a debug build such as "user-debug" or "eng".
588     * @hide
589     */
590    public static final boolean IS_DEBUGGABLE =
591            SystemProperties.getInt("ro.debuggable", 0) == 1;
592
593    /**
594     * Returns the version string for the radio firmware.  May return
595     * null (if, for instance, the radio is not currently on).
596     */
597    public static String getRadioVersion() {
598        return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null);
599    }
600
601    private static String getString(String property) {
602        return SystemProperties.get(property, UNKNOWN);
603    }
604
605    private static long getLong(String property) {
606        try {
607            return Long.parseLong(SystemProperties.get(property));
608        } catch (NumberFormatException e) {
609            return -1;
610        }
611    }
612}
613