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 17 package android.os; 18 19 import android.text.TextUtils; 20 import android.util.Slog; 21 22 import com.android.internal.telephony.TelephonyProperties; 23 import dalvik.system.VMRuntime; 24 25 /** 26 * Information about the current build, extracted from system properties. 27 */ 28 public class Build { 29 private static final String TAG = "Build"; 30 31 /** Value used for when a build property is unknown. */ 32 public static final String UNKNOWN = "unknown"; 33 34 /** Either a changelist number, or a label like "M4-rc20". */ 35 public static final String ID = getString("ro.build.id"); 36 37 /** A build ID string meant for displaying to the user */ 38 public static final String DISPLAY = getString("ro.build.display.id"); 39 40 /** The name of the overall product. */ 41 public static final String PRODUCT = getString("ro.product.name"); 42 43 /** The name of the industrial design. */ 44 public static final String DEVICE = getString("ro.product.device"); 45 46 /** The name of the underlying board, like "goldfish". */ 47 public static final String BOARD = getString("ro.product.board"); 48 49 /** 50 * The name of the instruction set (CPU type + ABI convention) of native code. 51 * 52 * @deprecated Use {@link #SUPPORTED_ABIS} instead. 53 */ 54 @Deprecated 55 public static final String CPU_ABI; 56 57 /** 58 * The name of the second instruction set (CPU type + ABI convention) of native code. 59 * 60 * @deprecated Use {@link #SUPPORTED_ABIS} instead. 61 */ 62 @Deprecated 63 public static final String CPU_ABI2; 64 65 /** The manufacturer of the product/hardware. */ 66 public static final String MANUFACTURER = getString("ro.product.manufacturer"); 67 68 /** The consumer-visible brand with which the product/hardware will be associated, if any. */ 69 public static final String BRAND = getString("ro.product.brand"); 70 71 /** The end-user-visible name for the end product. */ 72 public static final String MODEL = getString("ro.product.model"); 73 74 /** The system bootloader version number. */ 75 public static final String BOOTLOADER = getString("ro.bootloader"); 76 77 /** 78 * The radio firmware version number. 79 * 80 * @deprecated The radio firmware version is frequently not 81 * available when this class is initialized, leading to a blank or 82 * "unknown" value for this string. Use 83 * {@link #getRadioVersion} instead. 84 */ 85 @Deprecated 86 public static final String RADIO = getString(TelephonyProperties.PROPERTY_BASEBAND_VERSION); 87 88 /** The name of the hardware (from the kernel command line or /proc). */ 89 public static final String HARDWARE = getString("ro.hardware"); 90 91 /** A hardware serial number, if available. Alphanumeric only, case-insensitive. */ 92 public static final String SERIAL = getString("ro.serialno"); 93 94 /** 95 * An ordered list of ABIs supported by this device. The most preferred ABI is the first 96 * element in the list. 97 * 98 * See {@link #SUPPORTED_32_BIT_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}. 99 */ 100 public static final String[] SUPPORTED_ABIS = getStringList("ro.product.cpu.abilist", ","); 101 102 /** 103 * An ordered list of <b>32 bit</b> ABIs supported by this device. The most preferred ABI 104 * is the first element in the list. 105 * 106 * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}. 107 */ 108 public static final String[] SUPPORTED_32_BIT_ABIS = 109 getStringList("ro.product.cpu.abilist32", ","); 110 111 /** 112 * An ordered list of <b>64 bit</b> ABIs supported by this device. The most preferred ABI 113 * is the first element in the list. 114 * 115 * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_32_BIT_ABIS}. 116 */ 117 public static final String[] SUPPORTED_64_BIT_ABIS = 118 getStringList("ro.product.cpu.abilist64", ","); 119 120 121 static { 122 /* 123 * Adjusts CPU_ABI and CPU_ABI2 depending on whether or not a given process is 64 bit. 124 * 32 bit processes will always see 32 bit ABIs in these fields for backward 125 * compatibility. 126 */ 127 final String[] abiList; 128 if (VMRuntime.getRuntime().is64Bit()) { 129 abiList = SUPPORTED_64_BIT_ABIS; 130 } else { 131 abiList = SUPPORTED_32_BIT_ABIS; 132 } 133 134 CPU_ABI = abiList[0]; 135 if (abiList.length > 1) { 136 CPU_ABI2 = abiList[1]; 137 } else { 138 CPU_ABI2 = ""; 139 } 140 } 141 142 /** Various version strings. */ 143 public static class VERSION { 144 /** 145 * The internal value used by the underlying source control to 146 * represent this build. E.g., a perforce changelist number 147 * or a git hash. 148 */ 149 public static final String INCREMENTAL = getString("ro.build.version.incremental"); 150 151 /** 152 * The user-visible version string. E.g., "1.0" or "3.4b5". 153 */ 154 public static final String RELEASE = getString("ro.build.version.release"); 155 156 /** 157 * The user-visible SDK version of the framework in its raw String 158 * representation; use {@link #SDK_INT} instead. 159 * 160 * @deprecated Use {@link #SDK_INT} to easily get this as an integer. 161 */ 162 @Deprecated 163 public static final String SDK = getString("ro.build.version.sdk"); 164 165 /** 166 * The user-visible SDK version of the framework; its possible 167 * values are defined in {@link Build.VERSION_CODES}. 168 */ 169 public static final int SDK_INT = SystemProperties.getInt( 170 "ro.build.version.sdk", 0); 171 172 /** 173 * The current development codename, or the string "REL" if this is 174 * a release build. 175 */ 176 public static final String CODENAME = getString("ro.build.version.codename"); 177 178 private static final String[] ALL_CODENAMES 179 = getStringList("ro.build.version.all_codenames", ","); 180 181 /** 182 * @hide 183 */ 184 public static final String[] ACTIVE_CODENAMES = "REL".equals(ALL_CODENAMES[0]) 185 ? new String[0] : ALL_CODENAMES; 186 187 /** 188 * The SDK version to use when accessing resources. 189 * Use the current SDK version code. For every active development codename 190 * we are operating under, we bump the assumed resource platform version by 1. 191 * @hide 192 */ 193 public static final int RESOURCES_SDK_INT = SDK_INT + ACTIVE_CODENAMES.length; 194 } 195 196 /** 197 * Enumeration of the currently known SDK version codes. These are the 198 * values that can be found in {@link VERSION#SDK}. Version numbers 199 * increment monotonically with each official platform release. 200 */ 201 public static class VERSION_CODES { 202 /** 203 * Magic version number for a current development build, which has 204 * not yet turned into an official release. 205 */ 206 public static final int CUR_DEVELOPMENT = 10000; 207 208 /** 209 * October 2008: The original, first, version of Android. Yay! 210 */ 211 public static final int BASE = 1; 212 213 /** 214 * February 2009: First Android update, officially called 1.1. 215 */ 216 public static final int BASE_1_1 = 2; 217 218 /** 219 * May 2009: Android 1.5. 220 */ 221 public static final int CUPCAKE = 3; 222 223 /** 224 * September 2009: Android 1.6. 225 * 226 * <p>Applications targeting this or a later release will get these 227 * new changes in behavior:</p> 228 * <ul> 229 * <li> They must explicitly request the 230 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be 231 * able to modify the contents of the SD card. (Apps targeting 232 * earlier versions will always request the permission.) 233 * <li> They must explicitly request the 234 * {@link android.Manifest.permission#READ_PHONE_STATE} permission to be 235 * able to be able to retrieve phone state info. (Apps targeting 236 * earlier versions will always request the permission.) 237 * <li> They are assumed to support different screen densities and 238 * sizes. (Apps targeting earlier versions are assumed to only support 239 * medium density normal size screens unless otherwise indicated). 240 * They can still explicitly specify screen support either way with the 241 * supports-screens manifest tag. 242 * <li> {@link android.widget.TabHost} will use the new dark tab 243 * background design. 244 * </ul> 245 */ 246 public static final int DONUT = 4; 247 248 /** 249 * November 2009: Android 2.0 250 * 251 * <p>Applications targeting this or a later release will get these 252 * new changes in behavior:</p> 253 * <ul> 254 * <li> The {@link android.app.Service#onStartCommand 255 * Service.onStartCommand} function will return the new 256 * {@link android.app.Service#START_STICKY} behavior instead of the 257 * old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}. 258 * <li> The {@link android.app.Activity} class will now execute back 259 * key presses on the key up instead of key down, to be able to detect 260 * canceled presses from virtual keys. 261 * <li> The {@link android.widget.TabWidget} class will use a new color scheme 262 * for tabs. In the new scheme, the foreground tab has a medium gray background 263 * the background tabs have a dark gray background. 264 * </ul> 265 */ 266 public static final int ECLAIR = 5; 267 268 /** 269 * December 2009: Android 2.0.1 270 */ 271 public static final int ECLAIR_0_1 = 6; 272 273 /** 274 * January 2010: Android 2.1 275 */ 276 public static final int ECLAIR_MR1 = 7; 277 278 /** 279 * June 2010: Android 2.2 280 */ 281 public static final int FROYO = 8; 282 283 /** 284 * November 2010: Android 2.3 285 * 286 * <p>Applications targeting this or a later release will get these 287 * new changes in behavior:</p> 288 * <ul> 289 * <li> The application's notification icons will be shown on the new 290 * dark status bar background, so must be visible in this situation. 291 * </ul> 292 */ 293 public static final int GINGERBREAD = 9; 294 295 /** 296 * February 2011: Android 2.3.3. 297 */ 298 public static final int GINGERBREAD_MR1 = 10; 299 300 /** 301 * February 2011: Android 3.0. 302 * 303 * <p>Applications targeting this or a later release will get these 304 * new changes in behavior:</p> 305 * <ul> 306 * <li> The default theme for applications is now dark holographic: 307 * {@link android.R.style#Theme_Holo}. 308 * <li> On large screen devices that do not have a physical menu 309 * button, the soft (compatibility) menu is disabled. 310 * <li> The activity lifecycle has changed slightly as per 311 * {@link android.app.Activity}. 312 * <li> An application will crash if it does not call through 313 * to the super implementation of its 314 * {@link android.app.Activity#onPause Activity.onPause()} method. 315 * <li> When an application requires a permission to access one of 316 * its components (activity, receiver, service, provider), this 317 * permission is no longer enforced when the application wants to 318 * access its own component. This means it can require a permission 319 * on a component that it does not itself hold and still access that 320 * component. 321 * <li> {@link android.content.Context#getSharedPreferences 322 * Context.getSharedPreferences()} will not automatically reload 323 * the preferences if they have changed on storage, unless 324 * {@link android.content.Context#MODE_MULTI_PROCESS} is used. 325 * <li> {@link android.view.ViewGroup#setMotionEventSplittingEnabled} 326 * will default to true. 327 * <li> {@link android.view.WindowManager.LayoutParams#FLAG_SPLIT_TOUCH} 328 * is enabled by default on windows. 329 * <li> {@link android.widget.PopupWindow#isSplitTouchEnabled() 330 * PopupWindow.isSplitTouchEnabled()} will return true by default. 331 * <li> {@link android.widget.GridView} and {@link android.widget.ListView} 332 * will use {@link android.view.View#setActivated View.setActivated} 333 * for selected items if they do not implement {@link android.widget.Checkable}. 334 * <li> {@link android.widget.Scroller} will be constructed with 335 * "flywheel" behavior enabled by default. 336 * </ul> 337 */ 338 public static final int HONEYCOMB = 11; 339 340 /** 341 * May 2011: Android 3.1. 342 */ 343 public static final int HONEYCOMB_MR1 = 12; 344 345 /** 346 * June 2011: Android 3.2. 347 * 348 * <p>Update to Honeycomb MR1 to support 7 inch tablets, improve 349 * screen compatibility mode, etc.</p> 350 * 351 * <p>As of this version, applications that don't say whether they 352 * support XLARGE screens will be assumed to do so only if they target 353 * {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or 354 * later. Applications that don't support a screen size at least as 355 * large as the current screen will provide the user with a UI to 356 * switch them in to screen size compatibility mode.</p> 357 * 358 * <p>This version introduces new screen size resource qualifiers 359 * based on the screen size in dp: see 360 * {@link android.content.res.Configuration#screenWidthDp}, 361 * {@link android.content.res.Configuration#screenHeightDp}, and 362 * {@link android.content.res.Configuration#smallestScreenWidthDp}. 363 * Supplying these in <supports-screens> as per 364 * {@link android.content.pm.ApplicationInfo#requiresSmallestWidthDp}, 365 * {@link android.content.pm.ApplicationInfo#compatibleWidthLimitDp}, and 366 * {@link android.content.pm.ApplicationInfo#largestWidthLimitDp} is 367 * preferred over the older screen size buckets and for older devices 368 * the appropriate buckets will be inferred from them.</p> 369 * 370 * <p>Applications targeting this or a later release will get these 371 * new changes in behavior:</p> 372 * <ul> 373 * <li><p>New {@link android.content.pm.PackageManager#FEATURE_SCREEN_PORTRAIT} 374 * and {@link android.content.pm.PackageManager#FEATURE_SCREEN_LANDSCAPE} 375 * features were introduced in this release. Applications that target 376 * previous platform versions are assumed to require both portrait and 377 * landscape support in the device; when targeting Honeycomb MR1 or 378 * greater the application is responsible for specifying any specific 379 * orientation it requires.</p> 380 * <li><p>{@link android.os.AsyncTask} will use the serial executor 381 * by default when calling {@link android.os.AsyncTask#execute}.</p> 382 * <li><p>{@link android.content.pm.ActivityInfo#configChanges 383 * ActivityInfo.configChanges} will have the 384 * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE} and 385 * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE} 386 * bits set; these need to be cleared for older applications because 387 * some developers have done absolute comparisons against this value 388 * instead of correctly masking the bits they are interested in. 389 * </ul> 390 */ 391 public static final int HONEYCOMB_MR2 = 13; 392 393 /** 394 * October 2011: Android 4.0. 395 * 396 * <p>Applications targeting this or a later release will get these 397 * new changes in behavior:</p> 398 * <ul> 399 * <li> For devices without a dedicated menu key, the software compatibility 400 * menu key will not be shown even on phones. By targeting Ice Cream Sandwich 401 * or later, your UI must always have its own menu UI affordance if needed, 402 * on both tablets and phones. The ActionBar will take care of this for you. 403 * <li> 2d drawing hardware acceleration is now turned on by default. 404 * You can use 405 * {@link android.R.attr#hardwareAccelerated android:hardwareAccelerated} 406 * to turn it off if needed, although this is strongly discouraged since 407 * it will result in poor performance on larger screen devices. 408 * <li> The default theme for applications is now the "device default" theme: 409 * {@link android.R.style#Theme_DeviceDefault}. This may be the 410 * holo dark theme or a different dark theme defined by the specific device. 411 * The {@link android.R.style#Theme_Holo} family must not be modified 412 * for a device to be considered compatible. Applications that explicitly 413 * request a theme from the Holo family will be guaranteed that these themes 414 * will not change character within the same platform version. Applications 415 * that wish to blend in with the device should use a theme from the 416 * {@link android.R.style#Theme_DeviceDefault} family. 417 * <li> Managed cursors can now throw an exception if you directly close 418 * the cursor yourself without stopping the management of it; previously failures 419 * would be silently ignored. 420 * <li> The fadingEdge attribute on views will be ignored (fading edges is no 421 * longer a standard part of the UI). A new requiresFadingEdge attribute allows 422 * applications to still force fading edges on for special cases. 423 * <li> {@link android.content.Context#bindService Context.bindService()} 424 * will not automatically add in {@link android.content.Context#BIND_WAIVE_PRIORITY}. 425 * <li> App Widgets will have standard padding automatically added around 426 * them, rather than relying on the padding being baked into the widget itself. 427 * <li> An exception will be thrown if you try to change the type of a 428 * window after it has been added to the window manager. Previously this 429 * would result in random incorrect behavior. 430 * <li> {@link android.view.animation.AnimationSet} will parse out 431 * the duration, fillBefore, fillAfter, repeatMode, and startOffset 432 * XML attributes that are defined. 433 * <li> {@link android.app.ActionBar#setHomeButtonEnabled 434 * ActionBar.setHomeButtonEnabled()} is false by default. 435 * </ul> 436 */ 437 public static final int ICE_CREAM_SANDWICH = 14; 438 439 /** 440 * December 2011: Android 4.0.3. 441 */ 442 public static final int ICE_CREAM_SANDWICH_MR1 = 15; 443 444 /** 445 * June 2012: Android 4.1. 446 * 447 * <p>Applications targeting this or a later release will get these 448 * new changes in behavior:</p> 449 * <ul> 450 * <li> You must explicitly request the {@link android.Manifest.permission#READ_CALL_LOG} 451 * and/or {@link android.Manifest.permission#WRITE_CALL_LOG} permissions; 452 * access to the call log is no longer implicitly provided through 453 * {@link android.Manifest.permission#READ_CONTACTS} and 454 * {@link android.Manifest.permission#WRITE_CONTACTS}. 455 * <li> {@link android.widget.RemoteViews} will throw an exception if 456 * setting an onClick handler for views being generated by a 457 * {@link android.widget.RemoteViewsService} for a collection container; 458 * previously this just resulted in a warning log message. 459 * <li> New {@link android.app.ActionBar} policy for embedded tabs: 460 * embedded tabs are now always stacked in the action bar when in portrait 461 * mode, regardless of the size of the screen. 462 * <li> {@link android.webkit.WebSettings#setAllowFileAccessFromFileURLs(boolean) 463 * WebSettings.setAllowFileAccessFromFileURLs} and 464 * {@link android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs(boolean) 465 * WebSettings.setAllowUniversalAccessFromFileURLs} default to false. 466 * <li> Calls to {@link android.content.pm.PackageManager#setComponentEnabledSetting 467 * PackageManager.setComponentEnabledSetting} will now throw an 468 * IllegalArgumentException if the given component class name does not 469 * exist in the application's manifest. 470 * <li> {@link android.nfc.NfcAdapter#setNdefPushMessage 471 * NfcAdapter.setNdefPushMessage}, 472 * {@link android.nfc.NfcAdapter#setNdefPushMessageCallback 473 * NfcAdapter.setNdefPushMessageCallback} and 474 * {@link android.nfc.NfcAdapter#setOnNdefPushCompleteCallback 475 * NfcAdapter.setOnNdefPushCompleteCallback} will throw 476 * IllegalStateException if called after the Activity has been destroyed. 477 * <li> Accessibility services must require the new 478 * {@link android.Manifest.permission#BIND_ACCESSIBILITY_SERVICE} permission or 479 * they will not be available for use. 480 * <li> {@link android.accessibilityservice.AccessibilityServiceInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 481 * AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS} must be set 482 * for unimportant views to be included in queries. 483 * </ul> 484 */ 485 public static final int JELLY_BEAN = 16; 486 487 /** 488 * November 2012: Android 4.2, Moar jelly beans! 489 * 490 * <p>Applications targeting this or a later release will get these 491 * new changes in behavior:</p> 492 * <ul> 493 * <li>Content Providers: The default value of {@code android:exported} is now 494 * {@code false}. See 495 * <a href="{@docRoot}guide/topics/manifest/provider-element.html#exported"> 496 * the android:exported section</a> in the provider documentation for more details.</li> 497 * <li>{@link android.view.View#getLayoutDirection() View.getLayoutDirection()} 498 * can return different values than {@link android.view.View#LAYOUT_DIRECTION_LTR} 499 * based on the locale etc. 500 * <li> {@link android.webkit.WebView#addJavascriptInterface(Object, String) 501 * WebView.addJavascriptInterface} requires explicit annotations on methods 502 * for them to be accessible from Javascript. 503 * </ul> 504 */ 505 public static final int JELLY_BEAN_MR1 = 17; 506 507 /** 508 * July 2013: Android 4.3, the revenge of the beans. 509 */ 510 public static final int JELLY_BEAN_MR2 = 18; 511 512 /** 513 * October 2013: Android 4.4, KitKat, another tasty treat. 514 * 515 * <p>Applications targeting this or a later release will get these 516 * new changes in behavior:</p> 517 * <ul> 518 * <li> The default result of {android.preference.PreferenceActivity#isValidFragment 519 * PreferenceActivity.isValueFragment} becomes false instead of true.</li> 520 * <li> In {@link android.webkit.WebView}, apps targeting earlier versions will have 521 * JS URLs evaluated directly and any result of the evaluation will not replace 522 * the current page content. Apps targetting KITKAT or later that load a JS URL will 523 * have the result of that URL replace the content of the current page</li> 524 * <li> {@link android.app.AlarmManager#set AlarmManager.set} becomes interpreted as 525 * an inexact value, to give the system more flexibility in scheduling alarms.</li> 526 * <li> {@link android.content.Context#getSharedPreferences(String, int) 527 * Context.getSharedPreferences} no longer allows a null name.</li> 528 * <li> {@link android.widget.RelativeLayout} changes to compute wrapped content 529 * margins correctly.</li> 530 * <li> {@link android.app.ActionBar}'s window content overlay is allowed to be 531 * drawn.</li> 532 * <li>The {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} 533 * permission is now always enforced.</li> 534 * <li>Access to package-specific external storage directories belonging 535 * to the calling app no longer requires the 536 * {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} or 537 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} 538 * permissions.</li> 539 * </ul> 540 */ 541 public static final int KITKAT = 19; 542 543 /** 544 * Android 4.4W: KitKat for watches, snacks on the run. 545 * 546 * <p>Applications targeting this or a later release will get these 547 * new changes in behavior:</p> 548 * <ul> 549 * <li>{@link android.app.AlertDialog} might not have a default background if the theme does 550 * not specify one.</li> 551 * </ul> 552 */ 553 public static final int KITKAT_WATCH = 20; 554 555 /** 556 * Temporary until we completely switch to {@link #LOLLIPOP}. 557 * @hide 558 */ 559 public static final int L = 21; 560 561 /** 562 * Lollipop. A flat one with beautiful shadows. But still tasty. 563 * 564 * <p>Applications targeting this or a later release will get these 565 * new changes in behavior:</p> 566 * <ul> 567 * <li> {@link android.content.Context#bindService Context.bindService} now 568 * requires an explicit Intent, and will throw an exception if given an implicit 569 * Intent.</li> 570 * <li> {@link android.app.Notification.Builder Notification.Builder} will 571 * not have the colors of their various notification elements adjusted to better 572 * match the new material design look.</li> 573 * <li> {@link android.os.Message} will validate that a message is not currently 574 * in use when it is recycled.</li> 575 * <li> Hardware accelerated drawing in windows will be enabled automatically 576 * in most places.</li> 577 * <li> {@link android.widget.Spinner} throws an exception if attaching an 578 * adapter with more than one item type.</li> 579 * <li> If the app is a launcher, the launcher will be available to the user 580 * even when they are using corporate profiles (which requires that the app 581 * use {@link android.content.pm.LauncherApps} to correctly populate its 582 * apps UI).</li> 583 * <li> Calling {@link android.app.Service#stopForeground Service.stopForeground} 584 * with removeNotification false will modify the still posted notification so that 585 * it is no longer forced to be ongoing.</li> 586 * <li> A {@link android.service.dreams.DreamService} must require the 587 * {@link android.Manifest.permission#BIND_DREAM_SERVICE} permission to be usable.</li> 588 * </ul> 589 */ 590 public static final int LOLLIPOP = 21; 591 } 592 593 /** The type of build, like "user" or "eng". */ 594 public static final String TYPE = getString("ro.build.type"); 595 596 /** Comma-separated tags describing the build, like "unsigned,debug". */ 597 public static final String TAGS = getString("ro.build.tags"); 598 599 /** A string that uniquely identifies this build. Do not attempt to parse this value. */ 600 public static final String FINGERPRINT = deriveFingerprint(); 601 602 /** 603 * Some devices split the fingerprint components between multiple 604 * partitions, so we might derive the fingerprint at runtime. 605 */ 606 private static String deriveFingerprint() { 607 String finger = SystemProperties.get("ro.build.fingerprint"); 608 if (TextUtils.isEmpty(finger)) { 609 finger = getString("ro.product.brand") + '/' + 610 getString("ro.product.name") + '/' + 611 getString("ro.product.device") + ':' + 612 getString("ro.build.version.release") + '/' + 613 getString("ro.build.id") + '/' + 614 getString("ro.build.version.incremental") + ':' + 615 getString("ro.build.type") + '/' + 616 getString("ro.build.tags"); 617 } 618 return finger; 619 } 620 621 /** 622 * Ensure that raw fingerprint system property is defined. If it was derived 623 * dynamically by {@link #deriveFingerprint()} this is where we push the 624 * derived value into the property service. 625 * 626 * @hide 627 */ 628 public static void ensureFingerprintProperty() { 629 if (TextUtils.isEmpty(SystemProperties.get("ro.build.fingerprint"))) { 630 try { 631 SystemProperties.set("ro.build.fingerprint", FINGERPRINT); 632 } catch (IllegalArgumentException e) { 633 Slog.e(TAG, "Failed to set fingerprint property", e); 634 } 635 } 636 } 637 638 // The following properties only make sense for internal engineering builds. 639 public static final long TIME = getLong("ro.build.date.utc") * 1000; 640 public static final String USER = getString("ro.build.user"); 641 public static final String HOST = getString("ro.build.host"); 642 643 /** 644 * Returns true if we are running a debug build such as "user-debug" or "eng". 645 * @hide 646 */ 647 public static final boolean IS_DEBUGGABLE = 648 SystemProperties.getInt("ro.debuggable", 0) == 1; 649 650 /** 651 * Returns the version string for the radio firmware. May return 652 * null (if, for instance, the radio is not currently on). 653 */ 654 public static String getRadioVersion() { 655 return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null); 656 } 657 658 private static String getString(String property) { 659 return SystemProperties.get(property, UNKNOWN); 660 } 661 662 private static String[] getStringList(String property, String separator) { 663 String value = SystemProperties.get(property); 664 if (value.isEmpty()) { 665 return new String[0]; 666 } else { 667 return value.split(separator); 668 } 669 } 670 671 private static long getLong(String property) { 672 try { 673 return Long.parseLong(SystemProperties.get(property)); 674 } catch (NumberFormatException e) { 675 return -1; 676 } 677 } 678 } 679
