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.annotation.SystemApi; 20 import android.text.TextUtils; 21 import android.util.Slog; 22 23 import com.android.internal.telephony.TelephonyProperties; 24 25 import dalvik.system.VMRuntime; 26 27 import java.util.Objects; 28 29 /** 30 * Information about the current build, extracted from system properties. 31 */ 32 public class Build { 33 private static final String TAG = "Build"; 34 35 /** Value used for when a build property is unknown. */ 36 public static final String UNKNOWN = "unknown"; 37 38 /** Either a changelist number, or a label like "M4-rc20". */ 39 public static final String ID = getString("ro.build.id"); 40 41 /** A build ID string meant for displaying to the user */ 42 public static final String DISPLAY = getString("ro.build.display.id"); 43 44 /** The name of the overall product. */ 45 public static final String PRODUCT = getString("ro.product.name"); 46 47 /** The name of the industrial design. */ 48 public static final String DEVICE = getString("ro.product.device"); 49 50 /** The name of the underlying board, like "goldfish". */ 51 public static final String BOARD = getString("ro.product.board"); 52 53 /** 54 * The name of the instruction set (CPU type + ABI convention) of native code. 55 * 56 * @deprecated Use {@link #SUPPORTED_ABIS} instead. 57 */ 58 @Deprecated 59 public static final String CPU_ABI; 60 61 /** 62 * The name of the second instruction set (CPU type + ABI convention) of native code. 63 * 64 * @deprecated Use {@link #SUPPORTED_ABIS} instead. 65 */ 66 @Deprecated 67 public static final String CPU_ABI2; 68 69 /** The manufacturer of the product/hardware. */ 70 public static final String MANUFACTURER = getString("ro.product.manufacturer"); 71 72 /** The consumer-visible brand with which the product/hardware will be associated, if any. */ 73 public static final String BRAND = getString("ro.product.brand"); 74 75 /** The end-user-visible name for the end product. */ 76 public static final String MODEL = getString("ro.product.model"); 77 78 /** The system bootloader version number. */ 79 public static final String BOOTLOADER = getString("ro.bootloader"); 80 81 /** 82 * The radio firmware version number. 83 * 84 * @deprecated The radio firmware version is frequently not 85 * available when this class is initialized, leading to a blank or 86 * "unknown" value for this string. Use 87 * {@link #getRadioVersion} instead. 88 */ 89 @Deprecated 90 public static final String RADIO = getString(TelephonyProperties.PROPERTY_BASEBAND_VERSION); 91 92 /** The name of the hardware (from the kernel command line or /proc). */ 93 public static final String HARDWARE = getString("ro.hardware"); 94 95 /** 96 * Whether this build was for an emulator device. 97 * @hide 98 */ 99 public static final boolean IS_EMULATOR = getString("ro.kernel.qemu").equals("1"); 100 101 /** A hardware serial number, if available. Alphanumeric only, case-insensitive. */ 102 public static final String SERIAL = getString("ro.serialno"); 103 104 /** 105 * An ordered list of ABIs supported by this device. The most preferred ABI is the first 106 * element in the list. 107 * 108 * See {@link #SUPPORTED_32_BIT_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}. 109 */ 110 public static final String[] SUPPORTED_ABIS = getStringList("ro.product.cpu.abilist", ","); 111 112 /** 113 * An ordered list of <b>32 bit</b> ABIs supported by this device. The most preferred ABI 114 * is the first element in the list. 115 * 116 * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}. 117 */ 118 public static final String[] SUPPORTED_32_BIT_ABIS = 119 getStringList("ro.product.cpu.abilist32", ","); 120 121 /** 122 * An ordered list of <b>64 bit</b> ABIs supported by this device. The most preferred ABI 123 * is the first element in the list. 124 * 125 * See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_32_BIT_ABIS}. 126 */ 127 public static final String[] SUPPORTED_64_BIT_ABIS = 128 getStringList("ro.product.cpu.abilist64", ","); 129 130 131 static { 132 /* 133 * Adjusts CPU_ABI and CPU_ABI2 depending on whether or not a given process is 64 bit. 134 * 32 bit processes will always see 32 bit ABIs in these fields for backward 135 * compatibility. 136 */ 137 final String[] abiList; 138 if (VMRuntime.getRuntime().is64Bit()) { 139 abiList = SUPPORTED_64_BIT_ABIS; 140 } else { 141 abiList = SUPPORTED_32_BIT_ABIS; 142 } 143 144 CPU_ABI = abiList[0]; 145 if (abiList.length > 1) { 146 CPU_ABI2 = abiList[1]; 147 } else { 148 CPU_ABI2 = ""; 149 } 150 } 151 152 /** Various version strings. */ 153 public static class VERSION { 154 /** 155 * The internal value used by the underlying source control to 156 * represent this build. E.g., a perforce changelist number 157 * or a git hash. 158 */ 159 public static final String INCREMENTAL = getString("ro.build.version.incremental"); 160 161 /** 162 * The user-visible version string. E.g., "1.0" or "3.4b5". 163 */ 164 public static final String RELEASE = getString("ro.build.version.release"); 165 166 /** 167 * The base OS build the product is based on. 168 */ 169 public static final String BASE_OS = SystemProperties.get("ro.build.version.base_os", ""); 170 171 /** 172 * The user-visible security patch level. 173 */ 174 public static final String SECURITY_PATCH = SystemProperties.get( 175 "ro.build.version.security_patch", ""); 176 177 /** 178 * The user-visible SDK version of the framework in its raw String 179 * representation; use {@link #SDK_INT} instead. 180 * 181 * @deprecated Use {@link #SDK_INT} to easily get this as an integer. 182 */ 183 @Deprecated 184 public static final String SDK = getString("ro.build.version.sdk"); 185 186 /** 187 * The user-visible SDK version of the framework; its possible 188 * values are defined in {@link Build.VERSION_CODES}. 189 */ 190 public static final int SDK_INT = SystemProperties.getInt( 191 "ro.build.version.sdk", 0); 192 193 /** 194 * The developer preview revision of a prerelease SDK. This value will always 195 * be <code>0</code> on production platform builds/devices. 196 * 197 * <p>When this value is nonzero, any new API added since the last 198 * officially published {@link #SDK_INT API level} is only guaranteed to be present 199 * on that specific preview revision. For example, an API <code>Activity.fooBar()</code> 200 * might be present in preview revision 1 but renamed or removed entirely in 201 * preview revision 2, which may cause an app attempting to call it to crash 202 * at runtime.</p> 203 * 204 * <p>Experimental apps targeting preview APIs should check this value for 205 * equality (<code>==</code>) with the preview SDK revision they were built for 206 * before using any prerelease platform APIs. Apps that detect a preview SDK revision 207 * other than the specific one they expect should fall back to using APIs from 208 * the previously published API level only to avoid unwanted runtime exceptions. 209 * </p> 210 */ 211 public static final int PREVIEW_SDK_INT = SystemProperties.getInt( 212 "ro.build.version.preview_sdk", 0); 213 214 /** 215 * The current development codename, or the string "REL" if this is 216 * a release build. 217 */ 218 public static final String CODENAME = getString("ro.build.version.codename"); 219 220 private static final String[] ALL_CODENAMES 221 = getStringList("ro.build.version.all_codenames", ","); 222 223 /** 224 * @hide 225 */ 226 public static final String[] ACTIVE_CODENAMES = "REL".equals(ALL_CODENAMES[0]) 227 ? new String[0] : ALL_CODENAMES; 228 229 /** 230 * The SDK version to use when accessing resources. 231 * Use the current SDK version code. For every active development codename 232 * we are operating under, we bump the assumed resource platform version by 1. 233 * @hide 234 */ 235 public static final int RESOURCES_SDK_INT = SDK_INT + ACTIVE_CODENAMES.length; 236 } 237 238 /** 239 * Enumeration of the currently known SDK version codes. These are the 240 * values that can be found in {@link VERSION#SDK}. Version numbers 241 * increment monotonically with each official platform release. 242 */ 243 public static class VERSION_CODES { 244 /** 245 * Magic version number for a current development build, which has 246 * not yet turned into an official release. 247 */ 248 public static final int CUR_DEVELOPMENT = 10000; 249 250 /** 251 * October 2008: The original, first, version of Android. Yay! 252 */ 253 public static final int BASE = 1; 254 255 /** 256 * February 2009: First Android update, officially called 1.1. 257 */ 258 public static final int BASE_1_1 = 2; 259 260 /** 261 * May 2009: Android 1.5. 262 */ 263 public static final int CUPCAKE = 3; 264 265 /** 266 * September 2009: Android 1.6. 267 * 268 * <p>Applications targeting this or a later release will get these 269 * new changes in behavior:</p> 270 * <ul> 271 * <li> They must explicitly request the 272 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be 273 * able to modify the contents of the SD card. (Apps targeting 274 * earlier versions will always request the permission.) 275 * <li> They must explicitly request the 276 * {@link android.Manifest.permission#READ_PHONE_STATE} permission to be 277 * able to be able to retrieve phone state info. (Apps targeting 278 * earlier versions will always request the permission.) 279 * <li> They are assumed to support different screen densities and 280 * sizes. (Apps targeting earlier versions are assumed to only support 281 * medium density normal size screens unless otherwise indicated). 282 * They can still explicitly specify screen support either way with the 283 * supports-screens manifest tag. 284 * <li> {@link android.widget.TabHost} will use the new dark tab 285 * background design. 286 * </ul> 287 */ 288 public static final int DONUT = 4; 289 290 /** 291 * November 2009: Android 2.0 292 * 293 * <p>Applications targeting this or a later release will get these 294 * new changes in behavior:</p> 295 * <ul> 296 * <li> The {@link android.app.Service#onStartCommand 297 * Service.onStartCommand} function will return the new 298 * {@link android.app.Service#START_STICKY} behavior instead of the 299 * old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}. 300 * <li> The {@link android.app.Activity} class will now execute back 301 * key presses on the key up instead of key down, to be able to detect 302 * canceled presses from virtual keys. 303 * <li> The {@link android.widget.TabWidget} class will use a new color scheme 304 * for tabs. In the new scheme, the foreground tab has a medium gray background 305 * the background tabs have a dark gray background. 306 * </ul> 307 */ 308 public static final int ECLAIR = 5; 309 310 /** 311 * December 2009: Android 2.0.1 312 */ 313 public static final int ECLAIR_0_1 = 6; 314 315 /** 316 * January 2010: Android 2.1 317 */ 318 public static final int ECLAIR_MR1 = 7; 319 320 /** 321 * June 2010: Android 2.2 322 */ 323 public static final int FROYO = 8; 324 325 /** 326 * November 2010: Android 2.3 327 * 328 * <p>Applications targeting this or a later release will get these 329 * new changes in behavior:</p> 330 * <ul> 331 * <li> The application's notification icons will be shown on the new 332 * dark status bar background, so must be visible in this situation. 333 * </ul> 334 */ 335 public static final int GINGERBREAD = 9; 336 337 /** 338 * February 2011: Android 2.3.3. 339 */ 340 public static final int GINGERBREAD_MR1 = 10; 341 342 /** 343 * February 2011: Android 3.0. 344 * 345 * <p>Applications targeting this or a later release will get these 346 * new changes in behavior:</p> 347 * <ul> 348 * <li> The default theme for applications is now dark holographic: 349 * {@link android.R.style#Theme_Holo}. 350 * <li> On large screen devices that do not have a physical menu 351 * button, the soft (compatibility) menu is disabled. 352 * <li> The activity lifecycle has changed slightly as per 353 * {@link android.app.Activity}. 354 * <li> An application will crash if it does not call through 355 * to the super implementation of its 356 * {@link android.app.Activity#onPause Activity.onPause()} method. 357 * <li> When an application requires a permission to access one of 358 * its components (activity, receiver, service, provider), this 359 * permission is no longer enforced when the application wants to 360 * access its own component. This means it can require a permission 361 * on a component that it does not itself hold and still access that 362 * component. 363 * <li> {@link android.content.Context#getSharedPreferences 364 * Context.getSharedPreferences()} will not automatically reload 365 * the preferences if they have changed on storage, unless 366 * {@link android.content.Context#MODE_MULTI_PROCESS} is used. 367 * <li> {@link android.view.ViewGroup#setMotionEventSplittingEnabled} 368 * will default to true. 369 * <li> {@link android.view.WindowManager.LayoutParams#FLAG_SPLIT_TOUCH} 370 * is enabled by default on windows. 371 * <li> {@link android.widget.PopupWindow#isSplitTouchEnabled() 372 * PopupWindow.isSplitTouchEnabled()} will return true by default. 373 * <li> {@link android.widget.GridView} and {@link android.widget.ListView} 374 * will use {@link android.view.View#setActivated View.setActivated} 375 * for selected items if they do not implement {@link android.widget.Checkable}. 376 * <li> {@link android.widget.Scroller} will be constructed with 377 * "flywheel" behavior enabled by default. 378 * </ul> 379 */ 380 public static final int HONEYCOMB = 11; 381 382 /** 383 * May 2011: Android 3.1. 384 */ 385 public static final int HONEYCOMB_MR1 = 12; 386 387 /** 388 * June 2011: Android 3.2. 389 * 390 * <p>Update to Honeycomb MR1 to support 7 inch tablets, improve 391 * screen compatibility mode, etc.</p> 392 * 393 * <p>As of this version, applications that don't say whether they 394 * support XLARGE screens will be assumed to do so only if they target 395 * {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or 396 * later. Applications that don't support a screen size at least as 397 * large as the current screen will provide the user with a UI to 398 * switch them in to screen size compatibility mode.</p> 399 * 400 * <p>This version introduces new screen size resource qualifiers 401 * based on the screen size in dp: see 402 * {@link android.content.res.Configuration#screenWidthDp}, 403 * {@link android.content.res.Configuration#screenHeightDp}, and 404 * {@link android.content.res.Configuration#smallestScreenWidthDp}. 405 * Supplying these in <supports-screens> as per 406 * {@link android.content.pm.ApplicationInfo#requiresSmallestWidthDp}, 407 * {@link android.content.pm.ApplicationInfo#compatibleWidthLimitDp}, and 408 * {@link android.content.pm.ApplicationInfo#largestWidthLimitDp} is 409 * preferred over the older screen size buckets and for older devices 410 * the appropriate buckets will be inferred from them.</p> 411 * 412 * <p>Applications targeting this or a later release will get these 413 * new changes in behavior:</p> 414 * <ul> 415 * <li><p>New {@link android.content.pm.PackageManager#FEATURE_SCREEN_PORTRAIT} 416 * and {@link android.content.pm.PackageManager#FEATURE_SCREEN_LANDSCAPE} 417 * features were introduced in this release. Applications that target 418 * previous platform versions are assumed to require both portrait and 419 * landscape support in the device; when targeting Honeycomb MR1 or 420 * greater the application is responsible for specifying any specific 421 * orientation it requires.</p> 422 * <li><p>{@link android.os.AsyncTask} will use the serial executor 423 * by default when calling {@link android.os.AsyncTask#execute}.</p> 424 * <li><p>{@link android.content.pm.ActivityInfo#configChanges 425 * ActivityInfo.configChanges} will have the 426 * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE} and 427 * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE} 428 * bits set; these need to be cleared for older applications because 429 * some developers have done absolute comparisons against this value 430 * instead of correctly masking the bits they are interested in. 431 * </ul> 432 */ 433 public static final int HONEYCOMB_MR2 = 13; 434 435 /** 436 * October 2011: Android 4.0. 437 * 438 * <p>Applications targeting this or a later release will get these 439 * new changes in behavior:</p> 440 * <ul> 441 * <li> For devices without a dedicated menu key, the software compatibility 442 * menu key will not be shown even on phones. By targeting Ice Cream Sandwich 443 * or later, your UI must always have its own menu UI affordance if needed, 444 * on both tablets and phones. The ActionBar will take care of this for you. 445 * <li> 2d drawing hardware acceleration is now turned on by default. 446 * You can use 447 * {@link android.R.attr#hardwareAccelerated android:hardwareAccelerated} 448 * to turn it off if needed, although this is strongly discouraged since 449 * it will result in poor performance on larger screen devices. 450 * <li> The default theme for applications is now the "device default" theme: 451 * {@link android.R.style#Theme_DeviceDefault}. This may be the 452 * holo dark theme or a different dark theme defined by the specific device. 453 * The {@link android.R.style#Theme_Holo} family must not be modified 454 * for a device to be considered compatible. Applications that explicitly 455 * request a theme from the Holo family will be guaranteed that these themes 456 * will not change character within the same platform version. Applications 457 * that wish to blend in with the device should use a theme from the 458 * {@link android.R.style#Theme_DeviceDefault} family. 459 * <li> Managed cursors can now throw an exception if you directly close 460 * the cursor yourself without stopping the management of it; previously failures 461 * would be silently ignored. 462 * <li> The fadingEdge attribute on views will be ignored (fading edges is no 463 * longer a standard part of the UI). A new requiresFadingEdge attribute allows 464 * applications to still force fading edges on for special cases. 465 * <li> {@link android.content.Context#bindService Context.bindService()} 466 * will not automatically add in {@link android.content.Context#BIND_WAIVE_PRIORITY}. 467 * <li> App Widgets will have standard padding automatically added around 468 * them, rather than relying on the padding being baked into the widget itself. 469 * <li> An exception will be thrown if you try to change the type of a 470 * window after it has been added to the window manager. Previously this 471 * would result in random incorrect behavior. 472 * <li> {@link android.view.animation.AnimationSet} will parse out 473 * the duration, fillBefore, fillAfter, repeatMode, and startOffset 474 * XML attributes that are defined. 475 * <li> {@link android.app.ActionBar#setHomeButtonEnabled 476 * ActionBar.setHomeButtonEnabled()} is false by default. 477 * </ul> 478 */ 479 public static final int ICE_CREAM_SANDWICH = 14; 480 481 /** 482 * December 2011: Android 4.0.3. 483 */ 484 public static final int ICE_CREAM_SANDWICH_MR1 = 15; 485 486 /** 487 * June 2012: Android 4.1. 488 * 489 * <p>Applications targeting this or a later release will get these 490 * new changes in behavior:</p> 491 * <ul> 492 * <li> You must explicitly request the {@link android.Manifest.permission#READ_CALL_LOG} 493 * and/or {@link android.Manifest.permission#WRITE_CALL_LOG} permissions; 494 * access to the call log is no longer implicitly provided through 495 * {@link android.Manifest.permission#READ_CONTACTS} and 496 * {@link android.Manifest.permission#WRITE_CONTACTS}. 497 * <li> {@link android.widget.RemoteViews} will throw an exception if 498 * setting an onClick handler for views being generated by a 499 * {@link android.widget.RemoteViewsService} for a collection container; 500 * previously this just resulted in a warning log message. 501 * <li> New {@link android.app.ActionBar} policy for embedded tabs: 502 * embedded tabs are now always stacked in the action bar when in portrait 503 * mode, regardless of the size of the screen. 504 * <li> {@link android.webkit.WebSettings#setAllowFileAccessFromFileURLs(boolean) 505 * WebSettings.setAllowFileAccessFromFileURLs} and 506 * {@link android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs(boolean) 507 * WebSettings.setAllowUniversalAccessFromFileURLs} default to false. 508 * <li> Calls to {@link android.content.pm.PackageManager#setComponentEnabledSetting 509 * PackageManager.setComponentEnabledSetting} will now throw an 510 * IllegalArgumentException if the given component class name does not 511 * exist in the application's manifest. 512 * <li> {@link android.nfc.NfcAdapter#setNdefPushMessage 513 * NfcAdapter.setNdefPushMessage}, 514 * {@link android.nfc.NfcAdapter#setNdefPushMessageCallback 515 * NfcAdapter.setNdefPushMessageCallback} and 516 * {@link android.nfc.NfcAdapter#setOnNdefPushCompleteCallback 517 * NfcAdapter.setOnNdefPushCompleteCallback} will throw 518 * IllegalStateException if called after the Activity has been destroyed. 519 * <li> Accessibility services must require the new 520 * {@link android.Manifest.permission#BIND_ACCESSIBILITY_SERVICE} permission or 521 * they will not be available for use. 522 * <li> {@link android.accessibilityservice.AccessibilityServiceInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 523 * AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS} must be set 524 * for unimportant views to be included in queries. 525 * </ul> 526 */ 527 public static final int JELLY_BEAN = 16; 528 529 /** 530 * November 2012: Android 4.2, Moar jelly beans! 531 * 532 * <p>Applications targeting this or a later release will get these 533 * new changes in behavior:</p> 534 * <ul> 535 * <li>Content Providers: The default value of {@code android:exported} is now 536 * {@code false}. See 537 * <a href="{@docRoot}guide/topics/manifest/provider-element.html#exported"> 538 * the android:exported section</a> in the provider documentation for more details.</li> 539 * <li>{@link android.view.View#getLayoutDirection() View.getLayoutDirection()} 540 * can return different values than {@link android.view.View#LAYOUT_DIRECTION_LTR} 541 * based on the locale etc. 542 * <li> {@link android.webkit.WebView#addJavascriptInterface(Object, String) 543 * WebView.addJavascriptInterface} requires explicit annotations on methods 544 * for them to be accessible from Javascript. 545 * </ul> 546 */ 547 public static final int JELLY_BEAN_MR1 = 17; 548 549 /** 550 * July 2013: Android 4.3, the revenge of the beans. 551 */ 552 public static final int JELLY_BEAN_MR2 = 18; 553 554 /** 555 * October 2013: Android 4.4, KitKat, another tasty treat. 556 * 557 * <p>Applications targeting this or a later release will get these 558 * new changes in behavior:</p> 559 * <ul> 560 * <li> The default result of 561 * {@link android.preference.PreferenceActivity#isValidFragment(String) 562 * PreferenceActivity.isValueFragment} becomes false instead of true.</li> 563 * <li> In {@link android.webkit.WebView}, apps targeting earlier versions will have 564 * JS URLs evaluated directly and any result of the evaluation will not replace 565 * the current page content. Apps targetting KITKAT or later that load a JS URL will 566 * have the result of that URL replace the content of the current page</li> 567 * <li> {@link android.app.AlarmManager#set AlarmManager.set} becomes interpreted as 568 * an inexact value, to give the system more flexibility in scheduling alarms.</li> 569 * <li> {@link android.content.Context#getSharedPreferences(String, int) 570 * Context.getSharedPreferences} no longer allows a null name.</li> 571 * <li> {@link android.widget.RelativeLayout} changes to compute wrapped content 572 * margins correctly.</li> 573 * <li> {@link android.app.ActionBar}'s window content overlay is allowed to be 574 * drawn.</li> 575 * <li>The {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} 576 * permission is now always enforced.</li> 577 * <li>Access to package-specific external storage directories belonging 578 * to the calling app no longer requires the 579 * {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} or 580 * {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} 581 * permissions.</li> 582 * </ul> 583 */ 584 public static final int KITKAT = 19; 585 586 /** 587 * June 2014: Android 4.4W. KitKat for watches, snacks on the run. 588 * 589 * <p>Applications targeting this or a later release will get these 590 * new changes in behavior:</p> 591 * <ul> 592 * <li>{@link android.app.AlertDialog} might not have a default background if the theme does 593 * not specify one.</li> 594 * </ul> 595 */ 596 public static final int KITKAT_WATCH = 20; 597 598 /** 599 * Temporary until we completely switch to {@link #LOLLIPOP}. 600 * @hide 601 */ 602 public static final int L = 21; 603 604 /** 605 * November 2014: Lollipop. A flat one with beautiful shadows. But still tasty. 606 * 607 * <p>Applications targeting this or a later release will get these 608 * new changes in behavior:</p> 609 * <ul> 610 * <li> {@link android.content.Context#bindService Context.bindService} now 611 * requires an explicit Intent, and will throw an exception if given an implicit 612 * Intent.</li> 613 * <li> {@link android.app.Notification.Builder Notification.Builder} will 614 * not have the colors of their various notification elements adjusted to better 615 * match the new material design look.</li> 616 * <li> {@link android.os.Message} will validate that a message is not currently 617 * in use when it is recycled.</li> 618 * <li> Hardware accelerated drawing in windows will be enabled automatically 619 * in most places.</li> 620 * <li> {@link android.widget.Spinner} throws an exception if attaching an 621 * adapter with more than one item type.</li> 622 * <li> If the app is a launcher, the launcher will be available to the user 623 * even when they are using corporate profiles (which requires that the app 624 * use {@link android.content.pm.LauncherApps} to correctly populate its 625 * apps UI).</li> 626 * <li> Calling {@link android.app.Service#stopForeground Service.stopForeground} 627 * with removeNotification false will modify the still posted notification so that 628 * it is no longer forced to be ongoing.</li> 629 * <li> A {@link android.service.dreams.DreamService} must require the 630 * {@link android.Manifest.permission#BIND_DREAM_SERVICE} permission to be usable.</li> 631 * </ul> 632 */ 633 public static final int LOLLIPOP = 21; 634 635 /** 636 * March 2015: Lollipop with an extra sugar coating on the outside! 637 */ 638 public static final int LOLLIPOP_MR1 = 22; 639 640 /** 641 * M is for Marshmallow! 642 * 643 * <p>Applications targeting this or a later release will get these 644 * new changes in behavior:</p> 645 * <ul> 646 * <li> Runtime permissions. Dangerous permissions are no longer granted at 647 * install time, but must be requested by the application at runtime through 648 * {@link android.app.Activity#requestPermissions}.</li> 649 * <li> Bluetooth and Wi-Fi scanning now requires holding the location permission.</li> 650 * <li> {@link android.app.AlarmManager#setTimeZone AlarmManager.setTimeZone} will fail if 651 * the given timezone is non-Olson.</li> 652 * <li> Activity transitions will only return shared 653 * elements mapped in the returned view hierarchy back to the calling activity.</li> 654 * <li> {@link android.view.View} allows a number of behaviors that may break 655 * existing apps: Canvas throws an exception if restore() is called too many times, 656 * widgets may return a hint size when returning UNSPECIFIED measure specs, and it 657 * will respect the attributes {@link android.R.attr#foreground}, 658 * {@link android.R.attr#foregroundGravity}, {@link android.R.attr#foregroundTint}, and 659 * {@link android.R.attr#foregroundTintMode}.</li> 660 * <li> {@link android.view.MotionEvent#getButtonState MotionEvent.getButtonState} 661 * will no longer report {@link android.view.MotionEvent#BUTTON_PRIMARY} 662 * and {@link android.view.MotionEvent#BUTTON_SECONDARY} as synonyms for 663 * {@link android.view.MotionEvent#BUTTON_STYLUS_PRIMARY} and 664 * {@link android.view.MotionEvent#BUTTON_STYLUS_SECONDARY}.</li> 665 * <li> {@link android.widget.ScrollView} now respects the layout param margins 666 * when measuring.</li> 667 * </ul> 668 */ 669 public static final int M = 23; 670 671 /** 672 * N is for Nougat. 673 * 674 * <p>Applications targeting this or a later release will get these 675 * new changes in behavior:</p> 676 * <ul> 677 * <li> {@link android.app.DownloadManager.Request#setAllowedNetworkTypes 678 * DownloadManager.Request.setAllowedNetworkTypes} 679 * will disable "allow over metered" when specifying only 680 * {@link android.app.DownloadManager.Request#NETWORK_WIFI}.</li> 681 * <li> {@link android.app.DownloadManager} no longer allows access to raw 682 * file paths.</li> 683 * <li> {@link android.app.Notification.Builder#setShowWhen 684 * Notification.Builder.setShowWhen} 685 * must be called explicitly to have the time shown, and various other changes in 686 * {@link android.app.Notification.Builder Notification.Builder} to how notifications 687 * are shown.</li> 688 * <li>{@link android.content.Context#MODE_WORLD_READABLE} and 689 * {@link android.content.Context#MODE_WORLD_WRITEABLE} are no longer supported.</li> 690 * <li>{@link android.os.FileUriExposedException} will be thrown to applications.</li> 691 * <li>Applications will see global drag and drops as per 692 * {@link android.view.View#DRAG_FLAG_GLOBAL}.</li> 693 * <li>{@link android.webkit.WebView#evaluateJavascript WebView.evaluateJavascript} 694 * will not persist state from an empty WebView.</li> 695 * <li>{@link android.animation.AnimatorSet} will not ignore calls to end() before 696 * start().</li> 697 * <li>{@link android.app.AlarmManager#cancel(android.app.PendingIntent) 698 * AlarmManager.cancel} will throw a NullPointerException if given a null operation.</li> 699 * <li>{@link android.app.FragmentManager} will ensure fragments have been created 700 * before being placed on the back stack.</li> 701 * <li>{@link android.app.FragmentManager} restores fragments in 702 * {@link android.app.Fragment#onCreate Fragment.onCreate} rather than after the 703 * method returns.</li> 704 * <li>{@link android.R.attr#resizeableActivity} defaults to true.</li> 705 * <li>{@link android.graphics.drawable.AnimatedVectorDrawable} throws exceptions when 706 * opening invalid VectorDrawable animations.</li> 707 * <li>{@link android.view.ViewGroup.MarginLayoutParams} will no longer be dropped 708 * when converting between some types of layout params (such as 709 * {@link android.widget.LinearLayout.LayoutParams LinearLayout.LayoutParams} to 710 * {@link android.widget.RelativeLayout.LayoutParams RelativeLayout.LayoutParams}).</li> 711 * <li>Your application processes will not be killed when the device density changes.</li> 712 * </ul> 713 */ 714 public static final int N = 24; 715 716 /** 717 * N MR1: Nougat++. 718 */ 719 public static final int N_MR1 = 25; 720 } 721 722 /** The type of build, like "user" or "eng". */ 723 public static final String TYPE = getString("ro.build.type"); 724 725 /** Comma-separated tags describing the build, like "unsigned,debug". */ 726 public static final String TAGS = getString("ro.build.tags"); 727 728 /** A string that uniquely identifies this build. Do not attempt to parse this value. */ 729 public static final String FINGERPRINT = deriveFingerprint(); 730 731 /** 732 * Some devices split the fingerprint components between multiple 733 * partitions, so we might derive the fingerprint at runtime. 734 */ deriveFingerprint()735 private static String deriveFingerprint() { 736 String finger = SystemProperties.get("ro.build.fingerprint"); 737 if (TextUtils.isEmpty(finger)) { 738 finger = getString("ro.product.brand") + '/' + 739 getString("ro.product.name") + '/' + 740 getString("ro.product.device") + ':' + 741 getString("ro.build.version.release") + '/' + 742 getString("ro.build.id") + '/' + 743 getString("ro.build.version.incremental") + ':' + 744 getString("ro.build.type") + '/' + 745 getString("ro.build.tags"); 746 } 747 return finger; 748 } 749 750 /** 751 * Ensure that raw fingerprint system property is defined. If it was derived 752 * dynamically by {@link #deriveFingerprint()} this is where we push the 753 * derived value into the property service. 754 * 755 * @hide 756 */ ensureFingerprintProperty()757 public static void ensureFingerprintProperty() { 758 if (TextUtils.isEmpty(SystemProperties.get("ro.build.fingerprint"))) { 759 try { 760 SystemProperties.set("ro.build.fingerprint", FINGERPRINT); 761 } catch (IllegalArgumentException e) { 762 Slog.e(TAG, "Failed to set fingerprint property", e); 763 } 764 } 765 } 766 767 /** 768 * Verifies the the current flash of the device is consistent with what 769 * was expected at build time. 770 * 1) Checks that device fingerprint is defined and that it matches across 771 * various partitions. 772 * 2) Verifies radio and bootloader partitions are those expected in the build. 773 * 774 * @hide 775 */ isBuildConsistent()776 public static boolean isBuildConsistent() { 777 // Don't care on eng builds. Incremental build may trigger false negative. 778 if ("eng".equals(TYPE)) return true; 779 780 final String system = SystemProperties.get("ro.build.fingerprint"); 781 final String vendor = SystemProperties.get("ro.vendor.build.fingerprint"); 782 final String bootimage = SystemProperties.get("ro.bootimage.build.fingerprint"); 783 final String requiredBootloader = SystemProperties.get("ro.build.expect.bootloader"); 784 final String currentBootloader = SystemProperties.get("ro.bootloader"); 785 final String requiredRadio = SystemProperties.get("ro.build.expect.baseband"); 786 final String currentRadio = SystemProperties.get("gsm.version.baseband"); 787 788 if (TextUtils.isEmpty(system)) { 789 Slog.e(TAG, "Required ro.build.fingerprint is empty!"); 790 return false; 791 } 792 793 if (!TextUtils.isEmpty(vendor)) { 794 if (!Objects.equals(system, vendor)) { 795 Slog.e(TAG, "Mismatched fingerprints; system reported " + system 796 + " but vendor reported " + vendor); 797 return false; 798 } 799 } 800 801 /* TODO: Figure out issue with checks failing 802 if (!TextUtils.isEmpty(bootimage)) { 803 if (!Objects.equals(system, bootimage)) { 804 Slog.e(TAG, "Mismatched fingerprints; system reported " + system 805 + " but bootimage reported " + bootimage); 806 return false; 807 } 808 } 809 810 if (!TextUtils.isEmpty(requiredBootloader)) { 811 if (!Objects.equals(currentBootloader, requiredBootloader)) { 812 Slog.e(TAG, "Mismatched bootloader version: build requires " + requiredBootloader 813 + " but runtime reports " + currentBootloader); 814 return false; 815 } 816 } 817 818 if (!TextUtils.isEmpty(requiredRadio)) { 819 if (!Objects.equals(currentRadio, requiredRadio)) { 820 Slog.e(TAG, "Mismatched radio version: build requires " + requiredRadio 821 + " but runtime reports " + currentRadio); 822 return false; 823 } 824 } 825 */ 826 827 return true; 828 } 829 830 // The following properties only make sense for internal engineering builds. 831 public static final long TIME = getLong("ro.build.date.utc") * 1000; 832 public static final String USER = getString("ro.build.user"); 833 public static final String HOST = getString("ro.build.host"); 834 835 /** 836 * Returns true if we are running a debug build such as "user-debug" or "eng". 837 * @hide 838 */ 839 public static final boolean IS_DEBUGGABLE = 840 SystemProperties.getInt("ro.debuggable", 0) == 1; 841 842 /** 843 * Specifies whether the permissions needed by a legacy app should be 844 * reviewed before any of its components can run. A legacy app is one 845 * with targetSdkVersion < 23, i.e apps using the old permission model. 846 * If review is not required, permissions are reviewed before the app 847 * is installed. 848 * 849 * @hide 850 */ 851 @SystemApi 852 public static final boolean PERMISSIONS_REVIEW_REQUIRED = 853 SystemProperties.getInt("ro.permission_review_required", 0) == 1; 854 855 /** 856 * Returns the version string for the radio firmware. May return 857 * null (if, for instance, the radio is not currently on). 858 */ getRadioVersion()859 public static String getRadioVersion() { 860 return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null); 861 } 862 getString(String property)863 private static String getString(String property) { 864 return SystemProperties.get(property, UNKNOWN); 865 } 866 getStringList(String property, String separator)867 private static String[] getStringList(String property, String separator) { 868 String value = SystemProperties.get(property); 869 if (value.isEmpty()) { 870 return new String[0]; 871 } else { 872 return value.split(separator); 873 } 874 } 875 getLong(String property)876 private static long getLong(String property) { 877 try { 878 return Long.parseLong(SystemProperties.get(property)); 879 } catch (NumberFormatException e) { 880 return -1; 881 } 882 } 883 } 884