Build.java revision fd282ed2f4649cc77127ab15b9167971abb5f379
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 24import dalvik.system.VMRuntime; 25 26import java.util.Objects; 27 28/** 29 * Information about the current build, extracted from system properties. 30 */ 31public class Build { 32 private static final String TAG = "Build"; 33 34 /** Value used for when a build property is unknown. */ 35 public static final String UNKNOWN = "unknown"; 36 37 /** Either a changelist number, or a label like "M4-rc20". */ 38 public static final String ID = getString("ro.build.id"); 39 40 /** A build ID string meant for displaying to the user */ 41 public static final String DISPLAY = getString("ro.build.display.id"); 42 43 /** The name of the overall product. */ 44 public static final String PRODUCT = getString("ro.product.name"); 45 46 /** The name of the industrial design. */ 47 public static final String DEVICE = getString("ro.product.device"); 48 49 /** The name of the underlying board, like "goldfish". */ 50 public static final String BOARD = getString("ro.product.board"); 51 52 /** 53 * The name of the instruction set (CPU type + ABI convention) of native code. 54 * 55 * @deprecated Use {@link #SUPPORTED_ABIS} instead. 56 */ 57 @Deprecated 58 public static final String CPU_ABI; 59 60 /** 61 * The name of the second instruction set (CPU type + ABI convention) of native code. 62 * 63 * @deprecated Use {@link #SUPPORTED_ABIS} instead. 64 */ 65 @Deprecated 66 public static final String CPU_ABI2; 67 68 /** The manufacturer of the product/hardware. */ 69 public static final String MANUFACTURER = getString("ro.product.manufacturer"); 70 71 /** The consumer-visible brand with which the product/hardware will be associated, if any. */ 72 public static final String BRAND = getString("ro.product.brand"); 73 74 /** The end-user-visible name for the end product. */ 75 public static final String MODEL = getString("ro.product.model"); 76 77 /** The system bootloader version number. */ 78 public static final String BOOTLOADER = getString("ro.bootloader"); 79 80 /** 81 * The radio firmware version number. 82 * 83 * @deprecated The radio firmware version is frequently not 84 * available when this class is initialized, leading to a blank or 85 * "unknown" value for this string. Use 86 * {@link #getRadioVersion} instead. 87 */ 88 @Deprecated 89 public static final String RADIO = getString(TelephonyProperties.PROPERTY_BASEBAND_VERSION); 90 91 /** The name of the hardware (from the kernel command line or /proc). */ 92 public static final String HARDWARE = getString("ro.hardware"); 93 94 /** A hardware serial number, if available. Alphanumeric only, case-insensitive. */ 95 public static final String SERIAL = getString("ro.serialno"); 96 97 /** 98 * An ordered list of ABIs supported by this device. The most preferred ABI is the first 99 * element in the list. 100 * 101 * See {@link #SUPPORTED_32_BIT_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}. 102 */ 103 public static final String[] SUPPORTED_ABIS = getStringList("ro.product.cpu.abilist", ","); 104 105 /** 106 * An ordered list of <b>32 bit</b> ABIs supported by this device. The most preferred ABI 107 * is the first element in the list. 108 * 109 * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}. 110 */ 111 public static final String[] SUPPORTED_32_BIT_ABIS = 112 getStringList("ro.product.cpu.abilist32", ","); 113 114 /** 115 * An ordered list of <b>64 bit</b> ABIs supported by this device. The most preferred ABI 116 * is the first element in the list. 117 * 118 * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_32_BIT_ABIS}. 119 */ 120 public static final String[] SUPPORTED_64_BIT_ABIS = 121 getStringList("ro.product.cpu.abilist64", ","); 122 123 124 static { 125 /* 126 * Adjusts CPU_ABI and CPU_ABI2 depending on whether or not a given process is 64 bit. 127 * 32 bit processes will always see 32 bit ABIs in these fields for backward 128 * compatibility. 129 */ 130 final String[] abiList; 131 if (VMRuntime.getRuntime().is64Bit()) { 132 abiList = SUPPORTED_64_BIT_ABIS; 133 } else { 134 abiList = SUPPORTED_32_BIT_ABIS; 135 } 136 137 CPU_ABI = abiList[0]; 138 if (abiList.length > 1) { 139 CPU_ABI2 = abiList[1]; 140 } else { 141 CPU_ABI2 = ""; 142 } 143 } 144 145 /** Various version strings. */ 146 public static class VERSION { 147 /** 148 * The internal value used by the underlying source control to 149 * represent this build. E.g., a perforce changelist number 150 * or a git hash. 151 */ 152 public static final String INCREMENTAL = getString("ro.build.version.incremental"); 153 154 /** 155 * The user-visible version string. E.g., "1.0" or "3.4b5". 156 */ 157 public static final String RELEASE = getString("ro.build.version.release"); 158 159 /** 160 * The user-visible SDK version of the framework in its raw String 161 * representation; use {@link #SDK_INT} instead. 162 * 163 * @deprecated Use {@link #SDK_INT} to easily get this as an integer. 164 */ 165 @Deprecated 166 public static final String SDK = getString("ro.build.version.sdk"); 167 168 /** 169 * The user-visible SDK version of the framework; its possible 170 * values are defined in {@link Build.VERSION_CODES}. 171 */ 172 public static final int SDK_INT = SystemProperties.getInt( 173 "ro.build.version.sdk", 0); 174 175 /** 176 * The current development codename, or the string "REL" if this is 177 * a release build. 178 */ 179 public static final String CODENAME = getString("ro.build.version.codename"); 180 181 private static final String[] ALL_CODENAMES 182 = getStringList("ro.build.version.all_codenames", ","); 183 184 /** 185 * @hide 186 */ 187 public static final String[] ACTIVE_CODENAMES = "REL".equals(ALL_CODENAMES[0]) 188 ? new String[0] : ALL_CODENAMES; 189 190 /** 191 * The SDK version to use when accessing resources. 192 * Use the current SDK version code. For every active development codename 193 * we are operating under, we bump the assumed resource platform version by 1. 194 * @hide 195 */ 196 public static final int RESOURCES_SDK_INT = SDK_INT + ACTIVE_CODENAMES.length; 197 } 198 199 /** 200 * Enumeration of the currently known SDK version codes. These are the 201 * values that can be found in {@link VERSION#SDK}. Version numbers 202 * increment monotonically with each official platform release. 203 */ 204 public static class VERSION_CODES { 205 /** 206 * Magic version number for a current development build, which has 207 * not yet turned into an official release. 208 */ 209 public static final int CUR_DEVELOPMENT = 10000; 210 211 /** 212 * October 2008: The original, first, version of Android. Yay! 213 */ 214 public static final int BASE = 1; 215 216 /** 217 * February 2009: First Android update, officially called 1.1. 218 */ 219 public static final int BASE_1_1 = 2; 220 221 /** 222 * May 2009: Android 1.5. 223 */ 224 public static final int CUPCAKE = 3; 225 226 /** 227 * September 2009: Android 1.6. 228 * 229 * <p>Applications targeting this or a later release will get these 230 * new changes in behavior:</p> 231 * <ul> 232 * <li> They must explicitly request the 233 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be 234 * able to modify the contents of the SD card. (Apps targeting 235 * earlier versions will always request the permission.) 236 * <li> They must explicitly request the 237 * {@link android.Manifest.permission#READ_PHONE_STATE} permission to be 238 * able to be able to retrieve phone state info. (Apps targeting 239 * earlier versions will always request the permission.) 240 * <li> They are assumed to support different screen densities and 241 * sizes. (Apps targeting earlier versions are assumed to only support 242 * medium density normal size screens unless otherwise indicated). 243 * They can still explicitly specify screen support either way with the 244 * supports-screens manifest tag. 245 * <li> {@link android.widget.TabHost} will use the new dark tab 246 * background design. 247 * </ul> 248 */ 249 public static final int DONUT = 4; 250 251 /** 252 * November 2009: Android 2.0 253 * 254 * <p>Applications targeting this or a later release will get these 255 * new changes in behavior:</p> 256 * <ul> 257 * <li> The {@link android.app.Service#onStartCommand 258 * Service.onStartCommand} function will return the new 259 * {@link android.app.Service#START_STICKY} behavior instead of the 260 * old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}. 261 * <li> The {@link android.app.Activity} class will now execute back 262 * key presses on the key up instead of key down, to be able to detect 263 * canceled presses from virtual keys. 264 * <li> The {@link android.widget.TabWidget} class will use a new color scheme 265 * for tabs. In the new scheme, the foreground tab has a medium gray background 266 * the background tabs have a dark gray background. 267 * </ul> 268 */ 269 public static final int ECLAIR = 5; 270 271 /** 272 * December 2009: Android 2.0.1 273 */ 274 public static final int ECLAIR_0_1 = 6; 275 276 /** 277 * January 2010: Android 2.1 278 */ 279 public static final int ECLAIR_MR1 = 7; 280 281 /** 282 * June 2010: Android 2.2 283 */ 284 public static final int FROYO = 8; 285 286 /** 287 * November 2010: Android 2.3 288 * 289 * <p>Applications targeting this or a later release will get these 290 * new changes in behavior:</p> 291 * <ul> 292 * <li> The application's notification icons will be shown on the new 293 * dark status bar background, so must be visible in this situation. 294 * </ul> 295 */ 296 public static final int GINGERBREAD = 9; 297 298 /** 299 * February 2011: Android 2.3.3. 300 */ 301 public static final int GINGERBREAD_MR1 = 10; 302 303 /** 304 * February 2011: Android 3.0. 305 * 306 * <p>Applications targeting this or a later release will get these 307 * new changes in behavior:</p> 308 * <ul> 309 * <li> The default theme for applications is now dark holographic: 310 * {@link android.R.style#Theme_Holo}. 311 * <li> On large screen devices that do not have a physical menu 312 * button, the soft (compatibility) menu is disabled. 313 * <li> The activity lifecycle has changed slightly as per 314 * {@link android.app.Activity}. 315 * <li> An application will crash if it does not call through 316 * to the super implementation of its 317 * {@link android.app.Activity#onPause Activity.onPause()} method. 318 * <li> When an application requires a permission to access one of 319 * its components (activity, receiver, service, provider), this 320 * permission is no longer enforced when the application wants to 321 * access its own component. This means it can require a permission 322 * on a component that it does not itself hold and still access that 323 * component. 324 * <li> {@link android.content.Context#getSharedPreferences 325 * Context.getSharedPreferences()} will not automatically reload 326 * the preferences if they have changed on storage, unless 327 * {@link android.content.Context#MODE_MULTI_PROCESS} is used. 328 * <li> {@link android.view.ViewGroup#setMotionEventSplittingEnabled} 329 * will default to true. 330 * <li> {@link android.view.WindowManager.LayoutParams#FLAG_SPLIT_TOUCH} 331 * is enabled by default on windows. 332 * <li> {@link android.widget.PopupWindow#isSplitTouchEnabled() 333 * PopupWindow.isSplitTouchEnabled()} will return true by default. 334 * <li> {@link android.widget.GridView} and {@link android.widget.ListView} 335 * will use {@link android.view.View#setActivated View.setActivated} 336 * for selected items if they do not implement {@link android.widget.Checkable}. 337 * <li> {@link android.widget.Scroller} will be constructed with 338 * "flywheel" behavior enabled by default. 339 * </ul> 340 */ 341 public static final int HONEYCOMB = 11; 342 343 /** 344 * May 2011: Android 3.1. 345 */ 346 public static final int HONEYCOMB_MR1 = 12; 347 348 /** 349 * June 2011: Android 3.2. 350 * 351 * <p>Update to Honeycomb MR1 to support 7 inch tablets, improve 352 * screen compatibility mode, etc.</p> 353 * 354 * <p>As of this version, applications that don't say whether they 355 * support XLARGE screens will be assumed to do so only if they target 356 * {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or 357 * later. Applications that don't support a screen size at least as 358 * large as the current screen will provide the user with a UI to 359 * switch them in to screen size compatibility mode.</p> 360 * 361 * <p>This version introduces new screen size resource qualifiers 362 * based on the screen size in dp: see 363 * {@link android.content.res.Configuration#screenWidthDp}, 364 * {@link android.content.res.Configuration#screenHeightDp}, and 365 * {@link android.content.res.Configuration#smallestScreenWidthDp}. 366 * Supplying these in <supports-screens> as per 367 * {@link android.content.pm.ApplicationInfo#requiresSmallestWidthDp}, 368 * {@link android.content.pm.ApplicationInfo#compatibleWidthLimitDp}, and 369 * {@link android.content.pm.ApplicationInfo#largestWidthLimitDp} is 370 * preferred over the older screen size buckets and for older devices 371 * the appropriate buckets will be inferred from them.</p> 372 * 373 * <p>Applications targeting this or a later release will get these 374 * new changes in behavior:</p> 375 * <ul> 376 * <li><p>New {@link android.content.pm.PackageManager#FEATURE_SCREEN_PORTRAIT} 377 * and {@link android.content.pm.PackageManager#FEATURE_SCREEN_LANDSCAPE} 378 * features were introduced in this release. Applications that target 379 * previous platform versions are assumed to require both portrait and 380 * landscape support in the device; when targeting Honeycomb MR1 or 381 * greater the application is responsible for specifying any specific 382 * orientation it requires.</p> 383 * <li><p>{@link android.os.AsyncTask} will use the serial executor 384 * by default when calling {@link android.os.AsyncTask#execute}.</p> 385 * <li><p>{@link android.content.pm.ActivityInfo#configChanges 386 * ActivityInfo.configChanges} will have the 387 * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE} and 388 * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE} 389 * bits set; these need to be cleared for older applications because 390 * some developers have done absolute comparisons against this value 391 * instead of correctly masking the bits they are interested in. 392 * </ul> 393 */ 394 public static final int HONEYCOMB_MR2 = 13; 395 396 /** 397 * October 2011: Android 4.0. 398 * 399 * <p>Applications targeting this or a later release will get these 400 * new changes in behavior:</p> 401 * <ul> 402 * <li> For devices without a dedicated menu key, the software compatibility 403 * menu key will not be shown even on phones. By targeting Ice Cream Sandwich 404 * or later, your UI must always have its own menu UI affordance if needed, 405 * on both tablets and phones. The ActionBar will take care of this for you. 406 * <li> 2d drawing hardware acceleration is now turned on by default. 407 * You can use 408 * {@link android.R.attr#hardwareAccelerated android:hardwareAccelerated} 409 * to turn it off if needed, although this is strongly discouraged since 410 * it will result in poor performance on larger screen devices. 411 * <li> The default theme for applications is now the "device default" theme: 412 * {@link android.R.style#Theme_DeviceDefault}. This may be the 413 * holo dark theme or a different dark theme defined by the specific device. 414 * The {@link android.R.style#Theme_Holo} family must not be modified 415 * for a device to be considered compatible. Applications that explicitly 416 * request a theme from the Holo family will be guaranteed that these themes 417 * will not change character within the same platform version. Applications 418 * that wish to blend in with the device should use a theme from the 419 * {@link android.R.style#Theme_DeviceDefault} family. 420 * <li> Managed cursors can now throw an exception if you directly close 421 * the cursor yourself without stopping the management of it; previously failures 422 * would be silently ignored. 423 * <li> The fadingEdge attribute on views will be ignored (fading edges is no 424 * longer a standard part of the UI). A new requiresFadingEdge attribute allows 425 * applications to still force fading edges on for special cases. 426 * <li> {@link android.content.Context#bindService Context.bindService()} 427 * will not automatically add in {@link android.content.Context#BIND_WAIVE_PRIORITY}. 428 * <li> App Widgets will have standard padding automatically added around 429 * them, rather than relying on the padding being baked into the widget itself. 430 * <li> An exception will be thrown if you try to change the type of a 431 * window after it has been added to the window manager. Previously this 432 * would result in random incorrect behavior. 433 * <li> {@link android.view.animation.AnimationSet} will parse out 434 * the duration, fillBefore, fillAfter, repeatMode, and startOffset 435 * XML attributes that are defined. 436 * <li> {@link android.app.ActionBar#setHomeButtonEnabled 437 * ActionBar.setHomeButtonEnabled()} is false by default. 438 * </ul> 439 */ 440 public static final int ICE_CREAM_SANDWICH = 14; 441 442 /** 443 * December 2011: Android 4.0.3. 444 */ 445 public static final int ICE_CREAM_SANDWICH_MR1 = 15; 446 447 /** 448 * June 2012: Android 4.1. 449 * 450 * <p>Applications targeting this or a later release will get these 451 * new changes in behavior:</p> 452 * <ul> 453 * <li> You must explicitly request the {@link android.Manifest.permission#READ_CALL_LOG} 454 * and/or {@link android.Manifest.permission#WRITE_CALL_LOG} permissions; 455 * access to the call log is no longer implicitly provided through 456 * {@link android.Manifest.permission#READ_CONTACTS} and 457 * {@link android.Manifest.permission#WRITE_CONTACTS}. 458 * <li> {@link android.widget.RemoteViews} will throw an exception if 459 * setting an onClick handler for views being generated by a 460 * {@link android.widget.RemoteViewsService} for a collection container; 461 * previously this just resulted in a warning log message. 462 * <li> New {@link android.app.ActionBar} policy for embedded tabs: 463 * embedded tabs are now always stacked in the action bar when in portrait 464 * mode, regardless of the size of the screen. 465 * <li> {@link android.webkit.WebSettings#setAllowFileAccessFromFileURLs(boolean) 466 * WebSettings.setAllowFileAccessFromFileURLs} and 467 * {@link android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs(boolean) 468 * WebSettings.setAllowUniversalAccessFromFileURLs} default to false. 469 * <li> Calls to {@link android.content.pm.PackageManager#setComponentEnabledSetting 470 * PackageManager.setComponentEnabledSetting} will now throw an 471 * IllegalArgumentException if the given component class name does not 472 * exist in the application's manifest. 473 * <li> {@link android.nfc.NfcAdapter#setNdefPushMessage 474 * NfcAdapter.setNdefPushMessage}, 475 * {@link android.nfc.NfcAdapter#setNdefPushMessageCallback 476 * NfcAdapter.setNdefPushMessageCallback} and 477 * {@link android.nfc.NfcAdapter#setOnNdefPushCompleteCallback 478 * NfcAdapter.setOnNdefPushCompleteCallback} will throw 479 * IllegalStateException if called after the Activity has been destroyed. 480 * <li> Accessibility services must require the new 481 * {@link android.Manifest.permission#BIND_ACCESSIBILITY_SERVICE} permission or 482 * they will not be available for use. 483 * <li> {@link android.accessibilityservice.AccessibilityServiceInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 484 * AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS} must be set 485 * for unimportant views to be included in queries. 486 * </ul> 487 */ 488 public static final int JELLY_BEAN = 16; 489 490 /** 491 * November 2012: Android 4.2, Moar jelly beans! 492 * 493 * <p>Applications targeting this or a later release will get these 494 * new changes in behavior:</p> 495 * <ul> 496 * <li>Content Providers: The default value of {@code android:exported} is now 497 * {@code false}. See 498 * <a href="{@docRoot}guide/topics/manifest/provider-element.html#exported"> 499 * the android:exported section</a> in the provider documentation for more details.</li> 500 * <li>{@link android.view.View#getLayoutDirection() View.getLayoutDirection()} 501 * can return different values than {@link android.view.View#LAYOUT_DIRECTION_LTR} 502 * based on the locale etc. 503 * <li> {@link android.webkit.WebView#addJavascriptInterface(Object, String) 504 * WebView.addJavascriptInterface} requires explicit annotations on methods 505 * for them to be accessible from Javascript. 506 * </ul> 507 */ 508 public static final int JELLY_BEAN_MR1 = 17; 509 510 /** 511 * July 2013: Android 4.3, the revenge of the beans. 512 */ 513 public static final int JELLY_BEAN_MR2 = 18; 514 515 /** 516 * October 2013: Android 4.4, KitKat, another tasty treat. 517 * 518 * <p>Applications targeting this or a later release will get these 519 * new changes in behavior:</p> 520 * <ul> 521 * <li> The default result of 522 * {@link android.preference.PreferenceActivity#isValidFragment(String) 523 * PreferenceActivity.isValueFragment} becomes false instead of true.</li> 524 * <li> In {@link android.webkit.WebView}, apps targeting earlier versions will have 525 * JS URLs evaluated directly and any result of the evaluation will not replace 526 * the current page content. Apps targetting KITKAT or later that load a JS URL will 527 * have the result of that URL replace the content of the current page</li> 528 * <li> {@link android.app.AlarmManager#set AlarmManager.set} becomes interpreted as 529 * an inexact value, to give the system more flexibility in scheduling alarms.</li> 530 * <li> {@link android.content.Context#getSharedPreferences(String, int) 531 * Context.getSharedPreferences} no longer allows a null name.</li> 532 * <li> {@link android.widget.RelativeLayout} changes to compute wrapped content 533 * margins correctly.</li> 534 * <li> {@link android.app.ActionBar}'s window content overlay is allowed to be 535 * drawn.</li> 536 * <li>The {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} 537 * permission is now always enforced.</li> 538 * <li>Access to package-specific external storage directories belonging 539 * to the calling app no longer requires the 540 * {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} or 541 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} 542 * permissions.</li> 543 * </ul> 544 */ 545 public static final int KITKAT = 19; 546 547 /** 548 * Android 4.4W: KitKat for watches, snacks on the run. 549 * 550 * <p>Applications targeting this or a later release will get these 551 * new changes in behavior:</p> 552 * <ul> 553 * <li>{@link android.app.AlertDialog} might not have a default background if the theme does 554 * not specify one.</li> 555 * </ul> 556 */ 557 public static final int KITKAT_WATCH = 20; 558 559 /** 560 * Temporary until we completely switch to {@link #LOLLIPOP}. 561 * @hide 562 */ 563 public static final int L = 21; 564 565 /** 566 * Lollipop. A flat one with beautiful shadows. But still tasty. 567 * 568 * <p>Applications targeting this or a later release will get these 569 * new changes in behavior:</p> 570 * <ul> 571 * <li> {@link android.content.Context#bindService Context.bindService} now 572 * requires an explicit Intent, and will throw an exception if given an implicit 573 * Intent.</li> 574 * <li> {@link android.app.Notification.Builder Notification.Builder} will 575 * not have the colors of their various notification elements adjusted to better 576 * match the new material design look.</li> 577 * <li> {@link android.os.Message} will validate that a message is not currently 578 * in use when it is recycled.</li> 579 * <li> Hardware accelerated drawing in windows will be enabled automatically 580 * in most places.</li> 581 * <li> {@link android.widget.Spinner} throws an exception if attaching an 582 * adapter with more than one item type.</li> 583 * <li> If the app is a launcher, the launcher will be available to the user 584 * even when they are using corporate profiles (which requires that the app 585 * use {@link android.content.pm.LauncherApps} to correctly populate its 586 * apps UI).</li> 587 * <li> Calling {@link android.app.Service#stopForeground Service.stopForeground} 588 * with removeNotification false will modify the still posted notification so that 589 * it is no longer forced to be ongoing.</li> 590 * <li> A {@link android.service.dreams.DreamService} must require the 591 * {@link android.Manifest.permission#BIND_DREAM_SERVICE} permission to be usable.</li> 592 * </ul> 593 */ 594 public static final int LOLLIPOP = 21; 595 596 /** 597 * Lollipop with an extra sugar coating on the outside! 598 */ 599 public static final int LOLLIPOP_MR1 = 22; 600 601 /** 602 * M comes after L. 603 */ 604 public static final int MNC = CUR_DEVELOPMENT; 605 } 606 607 /** The type of build, like "user" or "eng". */ 608 public static final String TYPE = getString("ro.build.type"); 609 610 /** Comma-separated tags describing the build, like "unsigned,debug". */ 611 public static final String TAGS = getString("ro.build.tags"); 612 613 /** A string that uniquely identifies this build. Do not attempt to parse this value. */ 614 public static final String FINGERPRINT = deriveFingerprint(); 615 616 /** 617 * Some devices split the fingerprint components between multiple 618 * partitions, so we might derive the fingerprint at runtime. 619 */ 620 private static String deriveFingerprint() { 621 String finger = SystemProperties.get("ro.build.fingerprint"); 622 if (TextUtils.isEmpty(finger)) { 623 finger = getString("ro.product.brand") + '/' + 624 getString("ro.product.name") + '/' + 625 getString("ro.product.device") + ':' + 626 getString("ro.build.version.release") + '/' + 627 getString("ro.build.id") + '/' + 628 getString("ro.build.version.incremental") + ':' + 629 getString("ro.build.type") + '/' + 630 getString("ro.build.tags"); 631 } 632 return finger; 633 } 634 635 /** 636 * Ensure that raw fingerprint system property is defined. If it was derived 637 * dynamically by {@link #deriveFingerprint()} this is where we push the 638 * derived value into the property service. 639 * 640 * @hide 641 */ 642 public static void ensureFingerprintProperty() { 643 if (TextUtils.isEmpty(SystemProperties.get("ro.build.fingerprint"))) { 644 try { 645 SystemProperties.set("ro.build.fingerprint", FINGERPRINT); 646 } catch (IllegalArgumentException e) { 647 Slog.e(TAG, "Failed to set fingerprint property", e); 648 } 649 } 650 } 651 652 /** 653 * Verifies the the current flash of the device is consistent with what 654 * was expected at build time. 655 * 1) Checks that device fingerprint is defined and that it matches across 656 * various partitions. 657 * 2) Verifies radio and bootloader partitions are those expected in the build. 658 * 659 * @hide 660 */ 661 public static boolean isBuildConsistent() { 662 final String system = SystemProperties.get("ro.build.fingerprint"); 663 final String vendor = SystemProperties.get("ro.vendor.build.fingerprint"); 664 final String bootimage = SystemProperties.get("ro.bootimage.build.fingerprint"); 665 final String requiredBootloader = SystemProperties.get("ro.build.expect.bootloader"); 666 final String currentBootloader = SystemProperties.get("ro.bootloader"); 667 final String requiredRadio = SystemProperties.get("ro.build.expect.baseband"); 668 final String currentRadio = SystemProperties.get("gsm.version.baseband"); 669 670 if (TextUtils.isEmpty(system)) { 671 Slog.e(TAG, "Required ro.build.fingerprint is empty!"); 672 return false; 673 } 674 675 if (!TextUtils.isEmpty(vendor)) { 676 if (!Objects.equals(system, vendor)) { 677 Slog.e(TAG, "Mismatched fingerprints; system reported " + system 678 + " but vendor reported " + vendor); 679 return false; 680 } 681 } 682 683 if (!TextUtils.isEmpty(bootimage)) { 684 if (!Objects.equals(system, bootimage)) { 685 Slog.e(TAG, "Mismatched fingerprints; system reported " + system 686 + " but bootimage reported " + bootimage); 687 return false; 688 } 689 } 690 691 if (!TextUtils.isEmpty(requiredBootloader)) { 692 if (!Objects.equals(currentBootloader, requiredBootloader)) { 693 Slog.e(TAG, "Mismatched bootloader version: build requires " + requiredBootloader 694 + " but runtime reports " + currentBootloader); 695 return false; 696 } 697 } 698 699 if (!TextUtils.isEmpty(requiredRadio)) { 700 if (!Objects.equals(currentRadio, requiredRadio)) { 701 Slog.e(TAG, "Mismatched radio version: build requires " + requiredRadio 702 + " but runtime reports " + currentRadio); 703 return false; 704 } 705 } 706 707 return true; 708 } 709 710 // The following properties only make sense for internal engineering builds. 711 public static final long TIME = getLong("ro.build.date.utc") * 1000; 712 public static final String USER = getString("ro.build.user"); 713 public static final String HOST = getString("ro.build.host"); 714 715 /** 716 * Returns true if we are running a debug build such as "user-debug" or "eng". 717 * @hide 718 */ 719 public static final boolean IS_DEBUGGABLE = 720 SystemProperties.getInt("ro.debuggable", 0) == 1; 721 722 /** 723 * Returns the version string for the radio firmware. May return 724 * null (if, for instance, the radio is not currently on). 725 */ 726 public static String getRadioVersion() { 727 return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null); 728 } 729 730 private static String getString(String property) { 731 return SystemProperties.get(property, UNKNOWN); 732 } 733 734 private static String[] getStringList(String property, String separator) { 735 String value = SystemProperties.get(property); 736 if (value.isEmpty()) { 737 return new String[0]; 738 } else { 739 return value.split(separator); 740 } 741 } 742 743 private static long getLong(String property) { 744 try { 745 return Long.parseLong(SystemProperties.get(property)); 746 } catch (NumberFormatException e) { 747 return -1; 748 } 749 } 750} 751