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 base OS build the product is based on. 161 */ 162 public static final String BASE_OS = SystemProperties.get("ro.build.version.base_os", ""); 163 164 /** 165 * The user-visible security patch level. 166 */ 167 public static final String SECURITY_PATCH = SystemProperties.get( 168 "ro.build.version.security_patch", ""); 169 170 /** 171 * The user-visible SDK version of the framework in its raw String 172 * representation; use {@link #SDK_INT} instead. 173 * 174 * @deprecated Use {@link #SDK_INT} to easily get this as an integer. 175 */ 176 @Deprecated 177 public static final String SDK = getString("ro.build.version.sdk"); 178 179 /** 180 * The user-visible SDK version of the framework; its possible 181 * values are defined in {@link Build.VERSION_CODES}. 182 */ 183 public static final int SDK_INT = SystemProperties.getInt( 184 "ro.build.version.sdk", 0); 185 186 /** 187 * The developer preview revision of a prerelease SDK. This value will always 188 * be <code>0</code> on production platform builds/devices. 189 * 190 * <p>When this value is nonzero, any new API added since the last 191 * officially published {@link #SDK_INT API level} is only guaranteed to be present 192 * on that specific preview revision. For example, an API <code>Activity.fooBar()</code> 193 * might be present in preview revision 1 but renamed or removed entirely in 194 * preview revision 2, which may cause an app attempting to call it to crash 195 * at runtime.</p> 196 * 197 * <p>Experimental apps targeting preview APIs should check this value for 198 * equality (<code>==</code>) with the preview SDK revision they were built for 199 * before using any prerelease platform APIs. Apps that detect a preview SDK revision 200 * other than the specific one they expect should fall back to using APIs from 201 * the previously published API level only to avoid unwanted runtime exceptions. 202 * </p> 203 */ 204 public static final int PREVIEW_SDK_INT = SystemProperties.getInt( 205 "ro.build.version.preview_sdk", 0); 206 207 /** 208 * The current development codename, or the string "REL" if this is 209 * a release build. 210 */ 211 public static final String CODENAME = getString("ro.build.version.codename"); 212 213 private static final String[] ALL_CODENAMES 214 = getStringList("ro.build.version.all_codenames", ","); 215 216 /** 217 * @hide 218 */ 219 public static final String[] ACTIVE_CODENAMES = "REL".equals(ALL_CODENAMES[0]) 220 ? new String[0] : ALL_CODENAMES; 221 222 /** 223 * The SDK version to use when accessing resources. 224 * Use the current SDK version code. For every active development codename 225 * we are operating under, we bump the assumed resource platform version by 1. 226 * @hide 227 */ 228 public static final int RESOURCES_SDK_INT = SDK_INT + ACTIVE_CODENAMES.length; 229 } 230 231 /** 232 * Enumeration of the currently known SDK version codes. These are the 233 * values that can be found in {@link VERSION#SDK}. Version numbers 234 * increment monotonically with each official platform release. 235 */ 236 public static class VERSION_CODES { 237 /** 238 * Magic version number for a current development build, which has 239 * not yet turned into an official release. 240 */ 241 public static final int CUR_DEVELOPMENT = 10000; 242 243 /** 244 * October 2008: The original, first, version of Android. Yay! 245 */ 246 public static final int BASE = 1; 247 248 /** 249 * February 2009: First Android update, officially called 1.1. 250 */ 251 public static final int BASE_1_1 = 2; 252 253 /** 254 * May 2009: Android 1.5. 255 */ 256 public static final int CUPCAKE = 3; 257 258 /** 259 * September 2009: Android 1.6. 260 * 261 * <p>Applications targeting this or a later release will get these 262 * new changes in behavior:</p> 263 * <ul> 264 * <li> They must explicitly request the 265 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be 266 * able to modify the contents of the SD card. (Apps targeting 267 * earlier versions will always request the permission.) 268 * <li> They must explicitly request the 269 * {@link android.Manifest.permission#READ_PHONE_STATE} permission to be 270 * able to be able to retrieve phone state info. (Apps targeting 271 * earlier versions will always request the permission.) 272 * <li> They are assumed to support different screen densities and 273 * sizes. (Apps targeting earlier versions are assumed to only support 274 * medium density normal size screens unless otherwise indicated). 275 * They can still explicitly specify screen support either way with the 276 * supports-screens manifest tag. 277 * <li> {@link android.widget.TabHost} will use the new dark tab 278 * background design. 279 * </ul> 280 */ 281 public static final int DONUT = 4; 282 283 /** 284 * November 2009: Android 2.0 285 * 286 * <p>Applications targeting this or a later release will get these 287 * new changes in behavior:</p> 288 * <ul> 289 * <li> The {@link android.app.Service#onStartCommand 290 * Service.onStartCommand} function will return the new 291 * {@link android.app.Service#START_STICKY} behavior instead of the 292 * old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}. 293 * <li> The {@link android.app.Activity} class will now execute back 294 * key presses on the key up instead of key down, to be able to detect 295 * canceled presses from virtual keys. 296 * <li> The {@link android.widget.TabWidget} class will use a new color scheme 297 * for tabs. In the new scheme, the foreground tab has a medium gray background 298 * the background tabs have a dark gray background. 299 * </ul> 300 */ 301 public static final int ECLAIR = 5; 302 303 /** 304 * December 2009: Android 2.0.1 305 */ 306 public static final int ECLAIR_0_1 = 6; 307 308 /** 309 * January 2010: Android 2.1 310 */ 311 public static final int ECLAIR_MR1 = 7; 312 313 /** 314 * June 2010: Android 2.2 315 */ 316 public static final int FROYO = 8; 317 318 /** 319 * November 2010: Android 2.3 320 * 321 * <p>Applications targeting this or a later release will get these 322 * new changes in behavior:</p> 323 * <ul> 324 * <li> The application's notification icons will be shown on the new 325 * dark status bar background, so must be visible in this situation. 326 * </ul> 327 */ 328 public static final int GINGERBREAD = 9; 329 330 /** 331 * February 2011: Android 2.3.3. 332 */ 333 public static final int GINGERBREAD_MR1 = 10; 334 335 /** 336 * February 2011: Android 3.0. 337 * 338 * <p>Applications targeting this or a later release will get these 339 * new changes in behavior:</p> 340 * <ul> 341 * <li> The default theme for applications is now dark holographic: 342 * {@link android.R.style#Theme_Holo}. 343 * <li> On large screen devices that do not have a physical menu 344 * button, the soft (compatibility) menu is disabled. 345 * <li> The activity lifecycle has changed slightly as per 346 * {@link android.app.Activity}. 347 * <li> An application will crash if it does not call through 348 * to the super implementation of its 349 * {@link android.app.Activity#onPause Activity.onPause()} method. 350 * <li> When an application requires a permission to access one of 351 * its components (activity, receiver, service, provider), this 352 * permission is no longer enforced when the application wants to 353 * access its own component. This means it can require a permission 354 * on a component that it does not itself hold and still access that 355 * component. 356 * <li> {@link android.content.Context#getSharedPreferences 357 * Context.getSharedPreferences()} will not automatically reload 358 * the preferences if they have changed on storage, unless 359 * {@link android.content.Context#MODE_MULTI_PROCESS} is used. 360 * <li> {@link android.view.ViewGroup#setMotionEventSplittingEnabled} 361 * will default to true. 362 * <li> {@link android.view.WindowManager.LayoutParams#FLAG_SPLIT_TOUCH} 363 * is enabled by default on windows. 364 * <li> {@link android.widget.PopupWindow#isSplitTouchEnabled() 365 * PopupWindow.isSplitTouchEnabled()} will return true by default. 366 * <li> {@link android.widget.GridView} and {@link android.widget.ListView} 367 * will use {@link android.view.View#setActivated View.setActivated} 368 * for selected items if they do not implement {@link android.widget.Checkable}. 369 * <li> {@link android.widget.Scroller} will be constructed with 370 * "flywheel" behavior enabled by default. 371 * </ul> 372 */ 373 public static final int HONEYCOMB = 11; 374 375 /** 376 * May 2011: Android 3.1. 377 */ 378 public static final int HONEYCOMB_MR1 = 12; 379 380 /** 381 * June 2011: Android 3.2. 382 * 383 * <p>Update to Honeycomb MR1 to support 7 inch tablets, improve 384 * screen compatibility mode, etc.</p> 385 * 386 * <p>As of this version, applications that don't say whether they 387 * support XLARGE screens will be assumed to do so only if they target 388 * {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or 389 * later. Applications that don't support a screen size at least as 390 * large as the current screen will provide the user with a UI to 391 * switch them in to screen size compatibility mode.</p> 392 * 393 * <p>This version introduces new screen size resource qualifiers 394 * based on the screen size in dp: see 395 * {@link android.content.res.Configuration#screenWidthDp}, 396 * {@link android.content.res.Configuration#screenHeightDp}, and 397 * {@link android.content.res.Configuration#smallestScreenWidthDp}. 398 * Supplying these in <supports-screens> as per 399 * {@link android.content.pm.ApplicationInfo#requiresSmallestWidthDp}, 400 * {@link android.content.pm.ApplicationInfo#compatibleWidthLimitDp}, and 401 * {@link android.content.pm.ApplicationInfo#largestWidthLimitDp} is 402 * preferred over the older screen size buckets and for older devices 403 * the appropriate buckets will be inferred from them.</p> 404 * 405 * <p>Applications targeting this or a later release will get these 406 * new changes in behavior:</p> 407 * <ul> 408 * <li><p>New {@link android.content.pm.PackageManager#FEATURE_SCREEN_PORTRAIT} 409 * and {@link android.content.pm.PackageManager#FEATURE_SCREEN_LANDSCAPE} 410 * features were introduced in this release. Applications that target 411 * previous platform versions are assumed to require both portrait and 412 * landscape support in the device; when targeting Honeycomb MR1 or 413 * greater the application is responsible for specifying any specific 414 * orientation it requires.</p> 415 * <li><p>{@link android.os.AsyncTask} will use the serial executor 416 * by default when calling {@link android.os.AsyncTask#execute}.</p> 417 * <li><p>{@link android.content.pm.ActivityInfo#configChanges 418 * ActivityInfo.configChanges} will have the 419 * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE} and 420 * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE} 421 * bits set; these need to be cleared for older applications because 422 * some developers have done absolute comparisons against this value 423 * instead of correctly masking the bits they are interested in. 424 * </ul> 425 */ 426 public static final int HONEYCOMB_MR2 = 13; 427 428 /** 429 * October 2011: Android 4.0. 430 * 431 * <p>Applications targeting this or a later release will get these 432 * new changes in behavior:</p> 433 * <ul> 434 * <li> For devices without a dedicated menu key, the software compatibility 435 * menu key will not be shown even on phones. By targeting Ice Cream Sandwich 436 * or later, your UI must always have its own menu UI affordance if needed, 437 * on both tablets and phones. The ActionBar will take care of this for you. 438 * <li> 2d drawing hardware acceleration is now turned on by default. 439 * You can use 440 * {@link android.R.attr#hardwareAccelerated android:hardwareAccelerated} 441 * to turn it off if needed, although this is strongly discouraged since 442 * it will result in poor performance on larger screen devices. 443 * <li> The default theme for applications is now the "device default" theme: 444 * {@link android.R.style#Theme_DeviceDefault}. This may be the 445 * holo dark theme or a different dark theme defined by the specific device. 446 * The {@link android.R.style#Theme_Holo} family must not be modified 447 * for a device to be considered compatible. Applications that explicitly 448 * request a theme from the Holo family will be guaranteed that these themes 449 * will not change character within the same platform version. Applications 450 * that wish to blend in with the device should use a theme from the 451 * {@link android.R.style#Theme_DeviceDefault} family. 452 * <li> Managed cursors can now throw an exception if you directly close 453 * the cursor yourself without stopping the management of it; previously failures 454 * would be silently ignored. 455 * <li> The fadingEdge attribute on views will be ignored (fading edges is no 456 * longer a standard part of the UI). A new requiresFadingEdge attribute allows 457 * applications to still force fading edges on for special cases. 458 * <li> {@link android.content.Context#bindService Context.bindService()} 459 * will not automatically add in {@link android.content.Context#BIND_WAIVE_PRIORITY}. 460 * <li> App Widgets will have standard padding automatically added around 461 * them, rather than relying on the padding being baked into the widget itself. 462 * <li> An exception will be thrown if you try to change the type of a 463 * window after it has been added to the window manager. Previously this 464 * would result in random incorrect behavior. 465 * <li> {@link android.view.animation.AnimationSet} will parse out 466 * the duration, fillBefore, fillAfter, repeatMode, and startOffset 467 * XML attributes that are defined. 468 * <li> {@link android.app.ActionBar#setHomeButtonEnabled 469 * ActionBar.setHomeButtonEnabled()} is false by default. 470 * </ul> 471 */ 472 public static final int ICE_CREAM_SANDWICH = 14; 473 474 /** 475 * December 2011: Android 4.0.3. 476 */ 477 public static final int ICE_CREAM_SANDWICH_MR1 = 15; 478 479 /** 480 * June 2012: Android 4.1. 481 * 482 * <p>Applications targeting this or a later release will get these 483 * new changes in behavior:</p> 484 * <ul> 485 * <li> You must explicitly request the {@link android.Manifest.permission#READ_CALL_LOG} 486 * and/or {@link android.Manifest.permission#WRITE_CALL_LOG} permissions; 487 * access to the call log is no longer implicitly provided through 488 * {@link android.Manifest.permission#READ_CONTACTS} and 489 * {@link android.Manifest.permission#WRITE_CONTACTS}. 490 * <li> {@link android.widget.RemoteViews} will throw an exception if 491 * setting an onClick handler for views being generated by a 492 * {@link android.widget.RemoteViewsService} for a collection container; 493 * previously this just resulted in a warning log message. 494 * <li> New {@link android.app.ActionBar} policy for embedded tabs: 495 * embedded tabs are now always stacked in the action bar when in portrait 496 * mode, regardless of the size of the screen. 497 * <li> {@link android.webkit.WebSettings#setAllowFileAccessFromFileURLs(boolean) 498 * WebSettings.setAllowFileAccessFromFileURLs} and 499 * {@link android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs(boolean) 500 * WebSettings.setAllowUniversalAccessFromFileURLs} default to false. 501 * <li> Calls to {@link android.content.pm.PackageManager#setComponentEnabledSetting 502 * PackageManager.setComponentEnabledSetting} will now throw an 503 * IllegalArgumentException if the given component class name does not 504 * exist in the application's manifest. 505 * <li> {@link android.nfc.NfcAdapter#setNdefPushMessage 506 * NfcAdapter.setNdefPushMessage}, 507 * {@link android.nfc.NfcAdapter#setNdefPushMessageCallback 508 * NfcAdapter.setNdefPushMessageCallback} and 509 * {@link android.nfc.NfcAdapter#setOnNdefPushCompleteCallback 510 * NfcAdapter.setOnNdefPushCompleteCallback} will throw 511 * IllegalStateException if called after the Activity has been destroyed. 512 * <li> Accessibility services must require the new 513 * {@link android.Manifest.permission#BIND_ACCESSIBILITY_SERVICE} permission or 514 * they will not be available for use. 515 * <li> {@link android.accessibilityservice.AccessibilityServiceInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 516 * AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS} must be set 517 * for unimportant views to be included in queries. 518 * </ul> 519 */ 520 public static final int JELLY_BEAN = 16; 521 522 /** 523 * November 2012: Android 4.2, Moar jelly beans! 524 * 525 * <p>Applications targeting this or a later release will get these 526 * new changes in behavior:</p> 527 * <ul> 528 * <li>Content Providers: The default value of {@code android:exported} is now 529 * {@code false}. See 530 * <a href="{@docRoot}guide/topics/manifest/provider-element.html#exported"> 531 * the android:exported section</a> in the provider documentation for more details.</li> 532 * <li>{@link android.view.View#getLayoutDirection() View.getLayoutDirection()} 533 * can return different values than {@link android.view.View#LAYOUT_DIRECTION_LTR} 534 * based on the locale etc. 535 * <li> {@link android.webkit.WebView#addJavascriptInterface(Object, String) 536 * WebView.addJavascriptInterface} requires explicit annotations on methods 537 * for them to be accessible from Javascript. 538 * </ul> 539 */ 540 public static final int JELLY_BEAN_MR1 = 17; 541 542 /** 543 * July 2013: Android 4.3, the revenge of the beans. 544 */ 545 public static final int JELLY_BEAN_MR2 = 18; 546 547 /** 548 * October 2013: Android 4.4, KitKat, another tasty treat. 549 * 550 * <p>Applications targeting this or a later release will get these 551 * new changes in behavior:</p> 552 * <ul> 553 * <li> The default result of 554 * {@link android.preference.PreferenceActivity#isValidFragment(String) 555 * PreferenceActivity.isValueFragment} becomes false instead of true.</li> 556 * <li> In {@link android.webkit.WebView}, apps targeting earlier versions will have 557 * JS URLs evaluated directly and any result of the evaluation will not replace 558 * the current page content. Apps targetting KITKAT or later that load a JS URL will 559 * have the result of that URL replace the content of the current page</li> 560 * <li> {@link android.app.AlarmManager#set AlarmManager.set} becomes interpreted as 561 * an inexact value, to give the system more flexibility in scheduling alarms.</li> 562 * <li> {@link android.content.Context#getSharedPreferences(String, int) 563 * Context.getSharedPreferences} no longer allows a null name.</li> 564 * <li> {@link android.widget.RelativeLayout} changes to compute wrapped content 565 * margins correctly.</li> 566 * <li> {@link android.app.ActionBar}'s window content overlay is allowed to be 567 * drawn.</li> 568 * <li>The {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} 569 * permission is now always enforced.</li> 570 * <li>Access to package-specific external storage directories belonging 571 * to the calling app no longer requires the 572 * {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} or 573 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} 574 * permissions.</li> 575 * </ul> 576 */ 577 public static final int KITKAT = 19; 578 579 /** 580 * June 2014: Android 4.4W. KitKat for watches, snacks on the run. 581 * 582 * <p>Applications targeting this or a later release will get these 583 * new changes in behavior:</p> 584 * <ul> 585 * <li>{@link android.app.AlertDialog} might not have a default background if the theme does 586 * not specify one.</li> 587 * </ul> 588 */ 589 public static final int KITKAT_WATCH = 20; 590 591 /** 592 * Temporary until we completely switch to {@link #LOLLIPOP}. 593 * @hide 594 */ 595 public static final int L = 21; 596 597 /** 598 * November 2014: Lollipop. A flat one with beautiful shadows. But still tasty. 599 * 600 * <p>Applications targeting this or a later release will get these 601 * new changes in behavior:</p> 602 * <ul> 603 * <li> {@link android.content.Context#bindService Context.bindService} now 604 * requires an explicit Intent, and will throw an exception if given an implicit 605 * Intent.</li> 606 * <li> {@link android.app.Notification.Builder Notification.Builder} will 607 * not have the colors of their various notification elements adjusted to better 608 * match the new material design look.</li> 609 * <li> {@link android.os.Message} will validate that a message is not currently 610 * in use when it is recycled.</li> 611 * <li> Hardware accelerated drawing in windows will be enabled automatically 612 * in most places.</li> 613 * <li> {@link android.widget.Spinner} throws an exception if attaching an 614 * adapter with more than one item type.</li> 615 * <li> If the app is a launcher, the launcher will be available to the user 616 * even when they are using corporate profiles (which requires that the app 617 * use {@link android.content.pm.LauncherApps} to correctly populate its 618 * apps UI).</li> 619 * <li> Calling {@link android.app.Service#stopForeground Service.stopForeground} 620 * with removeNotification false will modify the still posted notification so that 621 * it is no longer forced to be ongoing.</li> 622 * <li> A {@link android.service.dreams.DreamService} must require the 623 * {@link android.Manifest.permission#BIND_DREAM_SERVICE} permission to be usable.</li> 624 * </ul> 625 */ 626 public static final int LOLLIPOP = 21; 627 628 /** 629 * March 2015: Lollipop with an extra sugar coating on the outside! 630 */ 631 public static final int LOLLIPOP_MR1 = 22; 632 633 /** 634 * M is for Marshmallow! 635 * 636 * <p>Applications targeting this or a later release will get these 637 * new changes in behavior:</p> 638 * <ul> 639 * <li> Runtime permissions. Dangerous permissions are no longer granted at 640 * install time, but must be requested by the application at runtime through 641 * {@link android.app.Activity#requestPermissions}.</li> 642 * <li> Bluetooth and Wi-Fi scanning now requires holding the location permission.</li> 643 * <li> {@link android.app.AlarmManager#setTimeZone AlarmManager.setTimeZone} will fail if 644 * the given timezone is non-Olson.</li> 645 * <li> Activity transitions will only return shared 646 * elements mapped in the returned view hierarchy back to the calling activity.</li> 647 * <li> {@link android.view.View} allows a number of behaviors that may break 648 * existing apps: Canvas throws an exception if restore() is called too many times, 649 * widgets may return a hint size when returning UNSPECIFIED measure specs, and it 650 * will respect the attributes {@link android.R.attr#foreground}, 651 * {@link android.R.attr#foregroundGravity}, {@link android.R.attr#foregroundTint}, and 652 * {@link android.R.attr#foregroundTintMode}.</li> 653 * <li> {@link android.view.MotionEvent#getButtonState MotionEvent.getButtonState} 654 * will no longer report {@link android.view.MotionEvent#BUTTON_PRIMARY} 655 * and {@link android.view.MotionEvent#BUTTON_SECONDARY} as synonyms for 656 * {@link android.view.MotionEvent#BUTTON_STYLUS_PRIMARY} and 657 * {@link android.view.MotionEvent#BUTTON_STYLUS_SECONDARY}.</li> 658 * <li> {@link android.widget.ScrollView} now respects the layout param margins 659 * when measuring.</li> 660 * </ul> 661 */ 662 public static final int M = 23; 663 } 664 665 /** The type of build, like "user" or "eng". */ 666 public static final String TYPE = getString("ro.build.type"); 667 668 /** Comma-separated tags describing the build, like "unsigned,debug". */ 669 public static final String TAGS = getString("ro.build.tags"); 670 671 /** A string that uniquely identifies this build. Do not attempt to parse this value. */ 672 public static final String FINGERPRINT = deriveFingerprint(); 673 674 /** 675 * Some devices split the fingerprint components between multiple 676 * partitions, so we might derive the fingerprint at runtime. 677 */ 678 private static String deriveFingerprint() { 679 String finger = SystemProperties.get("ro.build.fingerprint"); 680 if (TextUtils.isEmpty(finger)) { 681 finger = getString("ro.product.brand") + '/' + 682 getString("ro.product.name") + '/' + 683 getString("ro.product.device") + ':' + 684 getString("ro.build.version.release") + '/' + 685 getString("ro.build.id") + '/' + 686 getString("ro.build.version.incremental") + ':' + 687 getString("ro.build.type") + '/' + 688 getString("ro.build.tags"); 689 } 690 return finger; 691 } 692 693 /** 694 * Ensure that raw fingerprint system property is defined. If it was derived 695 * dynamically by {@link #deriveFingerprint()} this is where we push the 696 * derived value into the property service. 697 * 698 * @hide 699 */ 700 public static void ensureFingerprintProperty() { 701 if (TextUtils.isEmpty(SystemProperties.get("ro.build.fingerprint"))) { 702 try { 703 SystemProperties.set("ro.build.fingerprint", FINGERPRINT); 704 } catch (IllegalArgumentException e) { 705 Slog.e(TAG, "Failed to set fingerprint property", e); 706 } 707 } 708 } 709 710 /** 711 * Verifies the the current flash of the device is consistent with what 712 * was expected at build time. 713 * 1) Checks that device fingerprint is defined and that it matches across 714 * various partitions. 715 * 2) Verifies radio and bootloader partitions are those expected in the build. 716 * 717 * @hide 718 */ 719 public static boolean isBuildConsistent() { 720 final String system = SystemProperties.get("ro.build.fingerprint"); 721 final String vendor = SystemProperties.get("ro.vendor.build.fingerprint"); 722 final String bootimage = SystemProperties.get("ro.bootimage.build.fingerprint"); 723 final String requiredBootloader = SystemProperties.get("ro.build.expect.bootloader"); 724 final String currentBootloader = SystemProperties.get("ro.bootloader"); 725 final String requiredRadio = SystemProperties.get("ro.build.expect.baseband"); 726 final String currentRadio = SystemProperties.get("gsm.version.baseband"); 727 728 if (TextUtils.isEmpty(system)) { 729 Slog.e(TAG, "Required ro.build.fingerprint is empty!"); 730 return false; 731 } 732 733 if (!TextUtils.isEmpty(vendor)) { 734 if (!Objects.equals(system, vendor)) { 735 Slog.e(TAG, "Mismatched fingerprints; system reported " + system 736 + " but vendor reported " + vendor); 737 return false; 738 } 739 } 740 741 /* TODO: Figure out issue with checks failing 742 if (!TextUtils.isEmpty(bootimage)) { 743 if (!Objects.equals(system, bootimage)) { 744 Slog.e(TAG, "Mismatched fingerprints; system reported " + system 745 + " but bootimage reported " + bootimage); 746 return false; 747 } 748 } 749 750 if (!TextUtils.isEmpty(requiredBootloader)) { 751 if (!Objects.equals(currentBootloader, requiredBootloader)) { 752 Slog.e(TAG, "Mismatched bootloader version: build requires " + requiredBootloader 753 + " but runtime reports " + currentBootloader); 754 return false; 755 } 756 } 757 758 if (!TextUtils.isEmpty(requiredRadio)) { 759 if (!Objects.equals(currentRadio, requiredRadio)) { 760 Slog.e(TAG, "Mismatched radio version: build requires " + requiredRadio 761 + " but runtime reports " + currentRadio); 762 return false; 763 } 764 } 765 */ 766 767 return true; 768 } 769 770 // The following properties only make sense for internal engineering builds. 771 public static final long TIME = getLong("ro.build.date.utc") * 1000; 772 public static final String USER = getString("ro.build.user"); 773 public static final String HOST = getString("ro.build.host"); 774 775 /** 776 * Returns true if we are running a debug build such as "user-debug" or "eng". 777 * @hide 778 */ 779 public static final boolean IS_DEBUGGABLE = 780 SystemProperties.getInt("ro.debuggable", 0) == 1; 781 782 /** 783 * Returns the version string for the radio firmware. May return 784 * null (if, for instance, the radio is not currently on). 785 */ 786 public static String getRadioVersion() { 787 return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null); 788 } 789 790 private static String getString(String property) { 791 return SystemProperties.get(property, UNKNOWN); 792 } 793 794 private static String[] getStringList(String property, String separator) { 795 String value = SystemProperties.get(property); 796 if (value.isEmpty()) { 797 return new String[0]; 798 } else { 799 return value.split(separator); 800 } 801 } 802 803 private static long getLong(String property) { 804 try { 805 return Long.parseLong(SystemProperties.get(property)); 806 } catch (NumberFormatException e) { 807 return -1; 808 } 809 } 810} 811