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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.os;
import android.Manifest;
import android.annotation.RequiresPermission;
import android.annotation.SystemApi;
import android.annotation.TestApi;
import android.app.Application;
import android.content.Context;
import android.text.TextUtils;
import android.util.Slog;
import android.view.View;
import com.android.internal.telephony.TelephonyProperties;
import dalvik.system.VMRuntime;
import java.util.Objects;
/**
* Information about the current build, extracted from system properties.
*/
public class Build {
private static final String TAG = "Build";
/** Value used for when a build property is unknown. */
public static final String UNKNOWN = "unknown";
/** Either a changelist number, or a label like "M4-rc20". */
public static final String ID = getString("ro.build.id");
/** A build ID string meant for displaying to the user */
public static final String DISPLAY = getString("ro.build.display.id");
/** The name of the overall product. */
public static final String PRODUCT = getString("ro.product.name");
/** The name of the industrial design. */
public static final String DEVICE = getString("ro.product.device");
/** The name of the underlying board, like "goldfish". */
public static final String BOARD = getString("ro.product.board");
/**
* The name of the instruction set (CPU type + ABI convention) of native code.
*
* @deprecated Use {@link #SUPPORTED_ABIS} instead.
*/
@Deprecated
public static final String CPU_ABI;
/**
* The name of the second instruction set (CPU type + ABI convention) of native code.
*
* @deprecated Use {@link #SUPPORTED_ABIS} instead.
*/
@Deprecated
public static final String CPU_ABI2;
/** The manufacturer of the product/hardware. */
public static final String MANUFACTURER = getString("ro.product.manufacturer");
/** The consumer-visible brand with which the product/hardware will be associated, if any. */
public static final String BRAND = getString("ro.product.brand");
/** The end-user-visible name for the end product. */
public static final String MODEL = getString("ro.product.model");
/** The system bootloader version number. */
public static final String BOOTLOADER = getString("ro.bootloader");
/**
* The radio firmware version number.
*
* @deprecated The radio firmware version is frequently not
* available when this class is initialized, leading to a blank or
* "unknown" value for this string. Use
* {@link #getRadioVersion} instead.
*/
@Deprecated
public static final String RADIO = getString(TelephonyProperties.PROPERTY_BASEBAND_VERSION);
/** The name of the hardware (from the kernel command line or /proc). */
public static final String HARDWARE = getString("ro.hardware");
/**
* Whether this build was for an emulator device.
* @hide
*/
public static final boolean IS_EMULATOR = getString("ro.kernel.qemu").equals("1");
/**
* A hardware serial number, if available. Alphanumeric only, case-insensitive.
* For apps targeting SDK higher than {@link Build.VERSION_CODES#O_MR1} this
* field is set to {@link Build#UNKNOWN}.
*
* @deprecated Use {@link #getSerial()} instead.
**/
@Deprecated
// IMPORTANT: This field should be initialized via a function call to
// prevent its value being inlined in the app during compilation because
// we will later set it to the value based on the app's target SDK.
public static final String SERIAL = getString("no.such.thing");
/**
* Gets the hardware serial number, if available.
*
* Note: Root access may allow you to modify device identifiers, such as
* the hardware serial number. If you change these identifiers, you can use
* key attestation to obtain
* proof of the device's original identifiers.
*
* @return The serial number if specified.
*/
@RequiresPermission(Manifest.permission.READ_PHONE_STATE)
public static String getSerial() {
IDeviceIdentifiersPolicyService service = IDeviceIdentifiersPolicyService.Stub
.asInterface(ServiceManager.getService(Context.DEVICE_IDENTIFIERS_SERVICE));
try {
return service.getSerial();
} catch (RemoteException e) {
e.rethrowFromSystemServer();
}
return UNKNOWN;
}
/**
* An ordered list of ABIs supported by this device. The most preferred ABI is the first
* element in the list.
*
* See {@link #SUPPORTED_32_BIT_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}.
*/
public static final String[] SUPPORTED_ABIS = getStringList("ro.product.cpu.abilist", ",");
/**
* An ordered list of 32 bit ABIs supported by this device. The most preferred ABI
* is the first element in the list.
*
* See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_64_BIT_ABIS}.
*/
public static final String[] SUPPORTED_32_BIT_ABIS =
getStringList("ro.product.cpu.abilist32", ",");
/**
* An ordered list of 64 bit ABIs supported by this device. The most preferred ABI
* is the first element in the list.
*
* See {@link #SUPPORTED_ABIS} and {@link #SUPPORTED_32_BIT_ABIS}.
*/
public static final String[] SUPPORTED_64_BIT_ABIS =
getStringList("ro.product.cpu.abilist64", ",");
static {
/*
* Adjusts CPU_ABI and CPU_ABI2 depending on whether or not a given process is 64 bit.
* 32 bit processes will always see 32 bit ABIs in these fields for backward
* compatibility.
*/
final String[] abiList;
if (VMRuntime.getRuntime().is64Bit()) {
abiList = SUPPORTED_64_BIT_ABIS;
} else {
abiList = SUPPORTED_32_BIT_ABIS;
}
CPU_ABI = abiList[0];
if (abiList.length > 1) {
CPU_ABI2 = abiList[1];
} else {
CPU_ABI2 = "";
}
}
/** Various version strings. */
public static class VERSION {
/**
* The internal value used by the underlying source control to
* represent this build. E.g., a perforce changelist number
* or a git hash.
*/
public static final String INCREMENTAL = getString("ro.build.version.incremental");
/**
* The user-visible version string. E.g., "1.0" or "3.4b5".
*/
public static final String RELEASE = getString("ro.build.version.release");
/**
* The base OS build the product is based on.
*/
public static final String BASE_OS = SystemProperties.get("ro.build.version.base_os", "");
/**
* The user-visible security patch level.
*/
public static final String SECURITY_PATCH = SystemProperties.get(
"ro.build.version.security_patch", "");
/**
* The user-visible SDK version of the framework in its raw String
* representation; use {@link #SDK_INT} instead.
*
* @deprecated Use {@link #SDK_INT} to easily get this as an integer.
*/
@Deprecated
public static final String SDK = getString("ro.build.version.sdk");
/**
* The SDK version of the software currently running on this hardware
* device. This value never changes while a device is booted, but it may
* increase when the hardware manufacturer provides an OTA update.
*
* Possible values are defined in {@link Build.VERSION_CODES}.
*
* @see #FIRST_SDK_INT
*/
public static final int SDK_INT = SystemProperties.getInt(
"ro.build.version.sdk", 0);
/**
* The SDK version of the software that initially shipped on
* this hardware device. It never changes during the lifetime
* of the device, even when {@link #SDK_INT} increases due to an OTA
* update.
*
* Possible values are defined in {@link Build.VERSION_CODES}.
*
* @see #SDK_INT
* @hide
*/
@TestApi
public static final int FIRST_SDK_INT = SystemProperties
.getInt("ro.product.first_api_level", 0);
/**
* The developer preview revision of a prerelease SDK. This value will always
* be 0 on production platform builds/devices.
*
*
When this value is nonzero, any new API added since the last
* officially published {@link #SDK_INT API level} is only guaranteed to be present
* on that specific preview revision. For example, an API Activity.fooBar()
* might be present in preview revision 1 but renamed or removed entirely in
* preview revision 2, which may cause an app attempting to call it to crash
* at runtime.
*
* Experimental apps targeting preview APIs should check this value for
* equality (==) with the preview SDK revision they were built for
* before using any prerelease platform APIs. Apps that detect a preview SDK revision
* other than the specific one they expect should fall back to using APIs from
* the previously published API level only to avoid unwanted runtime exceptions.
*
*/
public static final int PREVIEW_SDK_INT = SystemProperties.getInt(
"ro.build.version.preview_sdk", 0);
/**
* The current development codename, or the string "REL" if this is
* a release build.
*/
public static final String CODENAME = getString("ro.build.version.codename");
private static final String[] ALL_CODENAMES
= getStringList("ro.build.version.all_codenames", ",");
/**
* @hide
*/
public static final String[] ACTIVE_CODENAMES = "REL".equals(ALL_CODENAMES[0])
? new String[0] : ALL_CODENAMES;
/**
* The SDK version to use when accessing resources.
* Use the current SDK version code. For every active development codename
* we are operating under, we bump the assumed resource platform version by 1.
* @hide
*/
@TestApi
public static final int RESOURCES_SDK_INT = SDK_INT + ACTIVE_CODENAMES.length;
/**
* The current lowest supported value of app target SDK. Applications targeting
* lower values may not function on devices running this SDK version. Its possible
* values are defined in {@link Build.VERSION_CODES}.
*
* @hide
*/
public static final int MIN_SUPPORTED_TARGET_SDK_INT = SystemProperties.getInt(
"ro.build.version.min_supported_target_sdk", 0);
}
/**
* Enumeration of the currently known SDK version codes. These are the
* values that can be found in {@link VERSION#SDK}. Version numbers
* increment monotonically with each official platform release.
*/
public static class VERSION_CODES {
/**
* Magic version number for a current development build, which has
* not yet turned into an official release.
*/
public static final int CUR_DEVELOPMENT = VMRuntime.SDK_VERSION_CUR_DEVELOPMENT;
/**
* October 2008: The original, first, version of Android. Yay!
*/
public static final int BASE = 1;
/**
* February 2009: First Android update, officially called 1.1.
*/
public static final int BASE_1_1 = 2;
/**
* May 2009: Android 1.5.
*/
public static final int CUPCAKE = 3;
/**
* September 2009: Android 1.6.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - They must explicitly request the
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} permission to be
* able to modify the contents of the SD card. (Apps targeting
* earlier versions will always request the permission.)
*
- They must explicitly request the
* {@link android.Manifest.permission#READ_PHONE_STATE} permission to be
* able to be able to retrieve phone state info. (Apps targeting
* earlier versions will always request the permission.)
*
- They are assumed to support different screen densities and
* sizes. (Apps targeting earlier versions are assumed to only support
* medium density normal size screens unless otherwise indicated).
* They can still explicitly specify screen support either way with the
* supports-screens manifest tag.
*
- {@link android.widget.TabHost} will use the new dark tab
* background design.
*
*/
public static final int DONUT = 4;
/**
* November 2009: Android 2.0
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - The {@link android.app.Service#onStartCommand
* Service.onStartCommand} function will return the new
* {@link android.app.Service#START_STICKY} behavior instead of the
* old compatibility {@link android.app.Service#START_STICKY_COMPATIBILITY}.
*
- The {@link android.app.Activity} class will now execute back
* key presses on the key up instead of key down, to be able to detect
* canceled presses from virtual keys.
*
- The {@link android.widget.TabWidget} class will use a new color scheme
* for tabs. In the new scheme, the foreground tab has a medium gray background
* the background tabs have a dark gray background.
*
*/
public static final int ECLAIR = 5;
/**
* December 2009: Android 2.0.1
*/
public static final int ECLAIR_0_1 = 6;
/**
* January 2010: Android 2.1
*/
public static final int ECLAIR_MR1 = 7;
/**
* June 2010: Android 2.2
*/
public static final int FROYO = 8;
/**
* November 2010: Android 2.3
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - The application's notification icons will be shown on the new
* dark status bar background, so must be visible in this situation.
*
*/
public static final int GINGERBREAD = 9;
/**
* February 2011: Android 2.3.3.
*/
public static final int GINGERBREAD_MR1 = 10;
/**
* February 2011: Android 3.0.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - The default theme for applications is now dark holographic:
* {@link android.R.style#Theme_Holo}.
*
- On large screen devices that do not have a physical menu
* button, the soft (compatibility) menu is disabled.
*
- The activity lifecycle has changed slightly as per
* {@link android.app.Activity}.
*
- An application will crash if it does not call through
* to the super implementation of its
* {@link android.app.Activity#onPause Activity.onPause()} method.
*
- When an application requires a permission to access one of
* its components (activity, receiver, service, provider), this
* permission is no longer enforced when the application wants to
* access its own component. This means it can require a permission
* on a component that it does not itself hold and still access that
* component.
*
- {@link android.content.Context#getSharedPreferences
* Context.getSharedPreferences()} will not automatically reload
* the preferences if they have changed on storage, unless
* {@link android.content.Context#MODE_MULTI_PROCESS} is used.
*
- {@link android.view.ViewGroup#setMotionEventSplittingEnabled}
* will default to true.
*
- {@link android.view.WindowManager.LayoutParams#FLAG_SPLIT_TOUCH}
* is enabled by default on windows.
*
- {@link android.widget.PopupWindow#isSplitTouchEnabled()
* PopupWindow.isSplitTouchEnabled()} will return true by default.
*
- {@link android.widget.GridView} and {@link android.widget.ListView}
* will use {@link android.view.View#setActivated View.setActivated}
* for selected items if they do not implement {@link android.widget.Checkable}.
*
- {@link android.widget.Scroller} will be constructed with
* "flywheel" behavior enabled by default.
*
*/
public static final int HONEYCOMB = 11;
/**
* May 2011: Android 3.1.
*/
public static final int HONEYCOMB_MR1 = 12;
/**
* June 2011: Android 3.2.
*
* Update to Honeycomb MR1 to support 7 inch tablets, improve
* screen compatibility mode, etc.
*
* As of this version, applications that don't say whether they
* support XLARGE screens will be assumed to do so only if they target
* {@link #HONEYCOMB} or later; it had been {@link #GINGERBREAD} or
* later. Applications that don't support a screen size at least as
* large as the current screen will provide the user with a UI to
* switch them in to screen size compatibility mode.
*
* This version introduces new screen size resource qualifiers
* based on the screen size in dp: see
* {@link android.content.res.Configuration#screenWidthDp},
* {@link android.content.res.Configuration#screenHeightDp}, and
* {@link android.content.res.Configuration#smallestScreenWidthDp}.
* Supplying these in <supports-screens> as per
* {@link android.content.pm.ApplicationInfo#requiresSmallestWidthDp},
* {@link android.content.pm.ApplicationInfo#compatibleWidthLimitDp}, and
* {@link android.content.pm.ApplicationInfo#largestWidthLimitDp} is
* preferred over the older screen size buckets and for older devices
* the appropriate buckets will be inferred from them.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* New {@link android.content.pm.PackageManager#FEATURE_SCREEN_PORTRAIT}
* and {@link android.content.pm.PackageManager#FEATURE_SCREEN_LANDSCAPE}
* features were introduced in this release. Applications that target
* previous platform versions are assumed to require both portrait and
* landscape support in the device; when targeting Honeycomb MR1 or
* greater the application is responsible for specifying any specific
* orientation it requires.
* {@link android.os.AsyncTask} will use the serial executor
* by default when calling {@link android.os.AsyncTask#execute}.
* {@link android.content.pm.ActivityInfo#configChanges
* ActivityInfo.configChanges} will have the
* {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE} and
* {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE}
* bits set; these need to be cleared for older applications because
* some developers have done absolute comparisons against this value
* instead of correctly masking the bits they are interested in.
*
*/
public static final int HONEYCOMB_MR2 = 13;
/**
* October 2011: Android 4.0.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - For devices without a dedicated menu key, the software compatibility
* menu key will not be shown even on phones. By targeting Ice Cream Sandwich
* or later, your UI must always have its own menu UI affordance if needed,
* on both tablets and phones. The ActionBar will take care of this for you.
*
- 2d drawing hardware acceleration is now turned on by default.
* You can use
* {@link android.R.attr#hardwareAccelerated android:hardwareAccelerated}
* to turn it off if needed, although this is strongly discouraged since
* it will result in poor performance on larger screen devices.
*
- The default theme for applications is now the "device default" theme:
* {@link android.R.style#Theme_DeviceDefault}. This may be the
* holo dark theme or a different dark theme defined by the specific device.
* The {@link android.R.style#Theme_Holo} family must not be modified
* for a device to be considered compatible. Applications that explicitly
* request a theme from the Holo family will be guaranteed that these themes
* will not change character within the same platform version. Applications
* that wish to blend in with the device should use a theme from the
* {@link android.R.style#Theme_DeviceDefault} family.
*
- Managed cursors can now throw an exception if you directly close
* the cursor yourself without stopping the management of it; previously failures
* would be silently ignored.
*
- The fadingEdge attribute on views will be ignored (fading edges is no
* longer a standard part of the UI). A new requiresFadingEdge attribute allows
* applications to still force fading edges on for special cases.
*
- {@link android.content.Context#bindService Context.bindService()}
* will not automatically add in {@link android.content.Context#BIND_WAIVE_PRIORITY}.
*
- App Widgets will have standard padding automatically added around
* them, rather than relying on the padding being baked into the widget itself.
*
- An exception will be thrown if you try to change the type of a
* window after it has been added to the window manager. Previously this
* would result in random incorrect behavior.
*
- {@link android.view.animation.AnimationSet} will parse out
* the duration, fillBefore, fillAfter, repeatMode, and startOffset
* XML attributes that are defined.
*
- {@link android.app.ActionBar#setHomeButtonEnabled
* ActionBar.setHomeButtonEnabled()} is false by default.
*
*/
public static final int ICE_CREAM_SANDWICH = 14;
/**
* December 2011: Android 4.0.3.
*/
public static final int ICE_CREAM_SANDWICH_MR1 = 15;
/**
* June 2012: Android 4.1.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - You must explicitly request the {@link android.Manifest.permission#READ_CALL_LOG}
* and/or {@link android.Manifest.permission#WRITE_CALL_LOG} permissions;
* access to the call log is no longer implicitly provided through
* {@link android.Manifest.permission#READ_CONTACTS} and
* {@link android.Manifest.permission#WRITE_CONTACTS}.
*
- {@link android.widget.RemoteViews} will throw an exception if
* setting an onClick handler for views being generated by a
* {@link android.widget.RemoteViewsService} for a collection container;
* previously this just resulted in a warning log message.
*
- New {@link android.app.ActionBar} policy for embedded tabs:
* embedded tabs are now always stacked in the action bar when in portrait
* mode, regardless of the size of the screen.
*
- {@link android.webkit.WebSettings#setAllowFileAccessFromFileURLs(boolean)
* WebSettings.setAllowFileAccessFromFileURLs} and
* {@link android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs(boolean)
* WebSettings.setAllowUniversalAccessFromFileURLs} default to false.
*
- Calls to {@link android.content.pm.PackageManager#setComponentEnabledSetting
* PackageManager.setComponentEnabledSetting} will now throw an
* IllegalArgumentException if the given component class name does not
* exist in the application's manifest.
*
- {@link android.nfc.NfcAdapter#setNdefPushMessage
* NfcAdapter.setNdefPushMessage},
* {@link android.nfc.NfcAdapter#setNdefPushMessageCallback
* NfcAdapter.setNdefPushMessageCallback} and
* {@link android.nfc.NfcAdapter#setOnNdefPushCompleteCallback
* NfcAdapter.setOnNdefPushCompleteCallback} will throw
* IllegalStateException if called after the Activity has been destroyed.
*
- Accessibility services must require the new
* {@link android.Manifest.permission#BIND_ACCESSIBILITY_SERVICE} permission or
* they will not be available for use.
*
- {@link android.accessibilityservice.AccessibilityServiceInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS
* AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS} must be set
* for unimportant views to be included in queries.
*
*/
public static final int JELLY_BEAN = 16;
/**
* November 2012: Android 4.2, Moar jelly beans!
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - Content Providers: The default value of {@code android:exported} is now
* {@code false}. See
*
* the android:exported section in the provider documentation for more details.
* - {@link android.view.View#getLayoutDirection() View.getLayoutDirection()}
* can return different values than {@link android.view.View#LAYOUT_DIRECTION_LTR}
* based on the locale etc.
*
- {@link android.webkit.WebView#addJavascriptInterface(Object, String)
* WebView.addJavascriptInterface} requires explicit annotations on methods
* for them to be accessible from Javascript.
*
*/
public static final int JELLY_BEAN_MR1 = 17;
/**
* July 2013: Android 4.3, the revenge of the beans.
*/
public static final int JELLY_BEAN_MR2 = 18;
/**
* October 2013: Android 4.4, KitKat, another tasty treat.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - The default result of
* {@link android.preference.PreferenceActivity#isValidFragment(String)
* PreferenceActivity.isValueFragment} becomes false instead of true.
* - In {@link android.webkit.WebView}, apps targeting earlier versions will have
* JS URLs evaluated directly and any result of the evaluation will not replace
* the current page content. Apps targetting KITKAT or later that load a JS URL will
* have the result of that URL replace the content of the current page
* - {@link android.app.AlarmManager#set AlarmManager.set} becomes interpreted as
* an inexact value, to give the system more flexibility in scheduling alarms.
* - {@link android.content.Context#getSharedPreferences(String, int)
* Context.getSharedPreferences} no longer allows a null name.
* - {@link android.widget.RelativeLayout} changes to compute wrapped content
* margins correctly.
* - {@link android.app.ActionBar}'s window content overlay is allowed to be
* drawn.
* - The {@link android.Manifest.permission#READ_EXTERNAL_STORAGE}
* permission is now always enforced.
* - Access to package-specific external storage directories belonging
* to the calling app no longer requires the
* {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} or
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE}
* permissions.
*
*/
public static final int KITKAT = 19;
/**
* June 2014: Android 4.4W. KitKat for watches, snacks on the run.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - {@link android.app.AlertDialog} might not have a default background if the theme does
* not specify one.
*
*/
public static final int KITKAT_WATCH = 20;
/**
* Temporary until we completely switch to {@link #LOLLIPOP}.
* @hide
*/
public static final int L = 21;
/**
* November 2014: Lollipop. A flat one with beautiful shadows. But still tasty.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - {@link android.content.Context#bindService Context.bindService} now
* requires an explicit Intent, and will throw an exception if given an implicit
* Intent.
* - {@link android.app.Notification.Builder Notification.Builder} will
* not have the colors of their various notification elements adjusted to better
* match the new material design look.
* - {@link android.os.Message} will validate that a message is not currently
* in use when it is recycled.
* - Hardware accelerated drawing in windows will be enabled automatically
* in most places.
* - {@link android.widget.Spinner} throws an exception if attaching an
* adapter with more than one item type.
* - If the app is a launcher, the launcher will be available to the user
* even when they are using corporate profiles (which requires that the app
* use {@link android.content.pm.LauncherApps} to correctly populate its
* apps UI).
* - Calling {@link android.app.Service#stopForeground Service.stopForeground}
* with removeNotification false will modify the still posted notification so that
* it is no longer forced to be ongoing.
* - A {@link android.service.dreams.DreamService} must require the
* {@link android.Manifest.permission#BIND_DREAM_SERVICE} permission to be usable.
*
*/
public static final int LOLLIPOP = 21;
/**
* March 2015: Lollipop with an extra sugar coating on the outside!
*/
public static final int LOLLIPOP_MR1 = 22;
/**
* M is for Marshmallow!
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - Runtime permissions. Dangerous permissions are no longer granted at
* install time, but must be requested by the application at runtime through
* {@link android.app.Activity#requestPermissions}.
* - Bluetooth and Wi-Fi scanning now requires holding the location permission.
* - {@link android.app.AlarmManager#setTimeZone AlarmManager.setTimeZone} will fail if
* the given timezone is non-Olson.
* - Activity transitions will only return shared
* elements mapped in the returned view hierarchy back to the calling activity.
* - {@link android.view.View} allows a number of behaviors that may break
* existing apps: Canvas throws an exception if restore() is called too many times,
* widgets may return a hint size when returning UNSPECIFIED measure specs, and it
* will respect the attributes {@link android.R.attr#foreground},
* {@link android.R.attr#foregroundGravity}, {@link android.R.attr#foregroundTint}, and
* {@link android.R.attr#foregroundTintMode}.
* - {@link android.view.MotionEvent#getButtonState MotionEvent.getButtonState}
* will no longer report {@link android.view.MotionEvent#BUTTON_PRIMARY}
* and {@link android.view.MotionEvent#BUTTON_SECONDARY} as synonyms for
* {@link android.view.MotionEvent#BUTTON_STYLUS_PRIMARY} and
* {@link android.view.MotionEvent#BUTTON_STYLUS_SECONDARY}.
* - {@link android.widget.ScrollView} now respects the layout param margins
* when measuring.
*
*/
public static final int M = 23;
/**
* N is for Nougat.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - {@link android.app.DownloadManager.Request#setAllowedNetworkTypes
* DownloadManager.Request.setAllowedNetworkTypes}
* will disable "allow over metered" when specifying only
* {@link android.app.DownloadManager.Request#NETWORK_WIFI}.
* - {@link android.app.DownloadManager} no longer allows access to raw
* file paths.
* - {@link android.app.Notification.Builder#setShowWhen
* Notification.Builder.setShowWhen}
* must be called explicitly to have the time shown, and various other changes in
* {@link android.app.Notification.Builder Notification.Builder} to how notifications
* are shown.
* - {@link android.content.Context#MODE_WORLD_READABLE} and
* {@link android.content.Context#MODE_WORLD_WRITEABLE} are no longer supported.
* - {@link android.os.FileUriExposedException} will be thrown to applications.
* - Applications will see global drag and drops as per
* {@link android.view.View#DRAG_FLAG_GLOBAL}.
* - {@link android.webkit.WebView#evaluateJavascript WebView.evaluateJavascript}
* will not persist state from an empty WebView.
* - {@link android.animation.AnimatorSet} will not ignore calls to end() before
* start().
* - {@link android.app.AlarmManager#cancel(android.app.PendingIntent)
* AlarmManager.cancel} will throw a NullPointerException if given a null operation.
* - {@link android.app.FragmentManager} will ensure fragments have been created
* before being placed on the back stack.
* - {@link android.app.FragmentManager} restores fragments in
* {@link android.app.Fragment#onCreate Fragment.onCreate} rather than after the
* method returns.
* - {@link android.R.attr#resizeableActivity} defaults to true.
* - {@link android.graphics.drawable.AnimatedVectorDrawable} throws exceptions when
* opening invalid VectorDrawable animations.
* - {@link android.view.ViewGroup.MarginLayoutParams} will no longer be dropped
* when converting between some types of layout params (such as
* {@link android.widget.LinearLayout.LayoutParams LinearLayout.LayoutParams} to
* {@link android.widget.RelativeLayout.LayoutParams RelativeLayout.LayoutParams}).
* - Your application processes will not be killed when the device density changes.
* - Drag and drop. After a view receives the
* {@link android.view.DragEvent#ACTION_DRAG_ENTERED} event, when the drag shadow moves into
* a descendant view that can accept the data, the view receives the
* {@link android.view.DragEvent#ACTION_DRAG_EXITED} event and won’t receive
* {@link android.view.DragEvent#ACTION_DRAG_LOCATION} and
* {@link android.view.DragEvent#ACTION_DROP} events while the drag shadow is within that
* descendant view, even if the descendant view returns
false from its handler
* for these events.
*
*/
public static final int N = 24;
/**
* N MR1: Nougat++.
*/
public static final int N_MR1 = 25;
/**
* O.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - Background execution limits
* are applied to the application.
* - The behavior of AccountManager's
* {@link android.accounts.AccountManager#getAccountsByType},
* {@link android.accounts.AccountManager#getAccountsByTypeAndFeatures}, and
* {@link android.accounts.AccountManager#hasFeatures} has changed as documented there.
* - {@link android.app.ActivityManager.RunningAppProcessInfo#IMPORTANCE_PERCEPTIBLE_PRE_26}
* is now returned as
* {@link android.app.ActivityManager.RunningAppProcessInfo#IMPORTANCE_PERCEPTIBLE}.
* - The {@link android.app.NotificationManager} now requires the use of notification
* channels.
* - Changes to the strict mode that are set in
* {@link Application#onCreate Application.onCreate} will no longer be clobbered after
* that function returns.
* - A shared library apk with native code will have that native code included in
* the library path of its clients.
* - {@link android.content.Context#getSharedPreferences Context.getSharedPreferences}
* in credential encrypted storage will throw an exception before the user is unlocked.
* - Attempting to retrieve a {@link Context#FINGERPRINT_SERVICE} on a device that
* does not support that feature will now throw a runtime exception.
* - {@link android.app.Fragment} will stop any active view animations when
* the fragment is stopped.
* - Some compatibility code in Resources that attempts to use the default Theme
* the app may be using will be turned off, requiring the app to explicitly request
* resources with the right theme.
* - {@link android.content.ContentResolver#notifyChange ContentResolver.notifyChange} and
* {@link android.content.ContentResolver#registerContentObserver
* ContentResolver.registerContentObserver}
* will throw a SecurityException if the caller does not have permission to access
* the provider (or the provider doesn't exit); otherwise the call will be silently
* ignored.
* - {@link android.hardware.camera2.CameraDevice#createCaptureRequest
* CameraDevice.createCaptureRequest} will enable
* {@link android.hardware.camera2.CaptureRequest#CONTROL_ENABLE_ZSL} by default for
* still image capture.
* - WallpaperManager's {@link android.app.WallpaperManager#getWallpaperFile},
* {@link android.app.WallpaperManager#getDrawable},
* {@link android.app.WallpaperManager#getFastDrawable},
* {@link android.app.WallpaperManager#peekDrawable}, and
* {@link android.app.WallpaperManager#peekFastDrawable} will throw an exception
* if you can not access the wallpaper.
* - The behavior of
* {@link android.hardware.usb.UsbDeviceConnection#requestWait UsbDeviceConnection.requestWait}
* is modified as per the documentation there.
* - {@link StrictMode.VmPolicy.Builder#detectAll StrictMode.VmPolicy.Builder.detectAll}
* will also enable {@link StrictMode.VmPolicy.Builder#detectContentUriWithoutPermission}
* and {@link StrictMode.VmPolicy.Builder#detectUntaggedSockets}.
* - {@link StrictMode.ThreadPolicy.Builder#detectAll StrictMode.ThreadPolicy.Builder.detectAll}
* will also enable {@link StrictMode.ThreadPolicy.Builder#detectUnbufferedIo}.
* - {@link android.provider.DocumentsContract}'s various methods will throw failure
* exceptions back to the caller instead of returning null.
*
- {@link View#hasFocusable View.hasFocusable} now includes auto-focusable views.
* - {@link android.view.SurfaceView} will no longer always change the underlying
* Surface object when something about it changes; apps need to look at the current
* state of the object to determine which things they are interested in have changed.
* - {@link android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY} must be
* used for overlay windows, other system overlay window types are not allowed.
* - {@link android.view.ViewTreeObserver#addOnDrawListener
* ViewTreeObserver.addOnDrawListener} will throw an exception if called from within
* onDraw.
* - {@link android.graphics.Canvas#setBitmap Canvas.setBitmap} will no longer preserve
* the current matrix and clip stack of the canvas.
* - {@link android.widget.ListPopupWindow#setHeight ListPopupWindow.setHeight}
* will throw an exception if a negative height is supplied.
* - {@link android.widget.TextView} will use internationalized input for numbers,
* dates, and times.
* - {@link android.widget.Toast} must be used for showing toast windows; the toast
* window type can not be directly used.
* - {@link android.net.wifi.WifiManager#getConnectionInfo WifiManager.getConnectionInfo}
* requires that the caller hold the location permission to return BSSID/SSID
* - {@link android.net.wifi.p2p.WifiP2pManager#requestPeers WifiP2pManager.requestPeers}
* requires the caller hold the location permission.
* - {@link android.R.attr#maxAspectRatio} defaults to 0, meaning there is no restriction
* on the app's maximum aspect ratio (so it can be stretched to fill larger screens).
* - {@link android.R.attr#focusable} defaults to a new state ({@code auto}) where it will
* inherit the value of {@link android.R.attr#clickable} unless explicitly overridden.
* - A default theme-appropriate focus-state highlight will be supplied to all Views
* which don't provide a focus-state drawable themselves. This can be disabled by setting
* {@link android.R.attr#defaultFocusHighlightEnabled} to false.
*
*/
public static final int O = 26;
/**
* O MR1.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - Apps exporting and linking to apk shared libraries must explicitly
* enumerate all signing certificates in a consistent order.
* - {@link android.R.attr#screenOrientation} can not be used to request a fixed
* orientation if the associated activity is not fullscreen and opaque.
*
*/
public static final int O_MR1 = 27;
/**
* P.
*
* Applications targeting this or a later release will get these
* new changes in behavior:
*
* - {@link android.app.Service#startForeground Service.startForeground} requires
* that apps hold the permission
* {@link android.Manifest.permission#FOREGROUND_SERVICE}.
* - {@link android.widget.LinearLayout} will always remeasure weighted children,
* even if there is no excess space.
*
*/
public static final int P = 28;
}
/** The type of build, like "user" or "eng". */
public static final String TYPE = getString("ro.build.type");
/** Comma-separated tags describing the build, like "unsigned,debug". */
public static final String TAGS = getString("ro.build.tags");
/** A string that uniquely identifies this build. Do not attempt to parse this value. */
public static final String FINGERPRINT = deriveFingerprint();
/**
* Some devices split the fingerprint components between multiple
* partitions, so we might derive the fingerprint at runtime.
*/
private static String deriveFingerprint() {
String finger = SystemProperties.get("ro.build.fingerprint");
if (TextUtils.isEmpty(finger)) {
finger = getString("ro.product.brand") + '/' +
getString("ro.product.name") + '/' +
getString("ro.product.device") + ':' +
getString("ro.build.version.release") + '/' +
getString("ro.build.id") + '/' +
getString("ro.build.version.incremental") + ':' +
getString("ro.build.type") + '/' +
getString("ro.build.tags");
}
return finger;
}
/**
* Ensure that raw fingerprint system property is defined. If it was derived
* dynamically by {@link #deriveFingerprint()} this is where we push the
* derived value into the property service.
*
* @hide
*/
public static void ensureFingerprintProperty() {
if (TextUtils.isEmpty(SystemProperties.get("ro.build.fingerprint"))) {
try {
SystemProperties.set("ro.build.fingerprint", FINGERPRINT);
} catch (IllegalArgumentException e) {
Slog.e(TAG, "Failed to set fingerprint property", e);
}
}
}
/**
* True if Treble is enabled and required for this device.
*
* @hide
*/
public static final boolean IS_TREBLE_ENABLED =
SystemProperties.getBoolean("ro.treble.enabled", false);
/**
* Verifies the current flash of the device is consistent with what
* was expected at build time.
*
* Treble devices will verify the Vendor Interface (VINTF). A device
* launched without Treble:
*
* 1) Checks that device fingerprint is defined and that it matches across
* various partitions.
* 2) Verifies radio and bootloader partitions are those expected in the build.
*
* @hide
*/
public static boolean isBuildConsistent() {
// Don't care on eng builds. Incremental build may trigger false negative.
if (IS_ENG) return true;
if (IS_TREBLE_ENABLED) {
// If we can run this code, the device should already pass AVB.
// So, we don't need to check AVB here.
int result = VintfObject.verifyWithoutAvb();
if (result != 0) {
Slog.e(TAG, "Vendor interface is incompatible, error="
+ String.valueOf(result));
}
return result == 0;
}
final String system = SystemProperties.get("ro.build.fingerprint");
final String vendor = SystemProperties.get("ro.vendor.build.fingerprint");
final String bootimage = SystemProperties.get("ro.bootimage.build.fingerprint");
final String requiredBootloader = SystemProperties.get("ro.build.expect.bootloader");
final String currentBootloader = SystemProperties.get("ro.bootloader");
final String requiredRadio = SystemProperties.get("ro.build.expect.baseband");
final String currentRadio = SystemProperties.get("gsm.version.baseband");
if (TextUtils.isEmpty(system)) {
Slog.e(TAG, "Required ro.build.fingerprint is empty!");
return false;
}
if (!TextUtils.isEmpty(vendor)) {
if (!Objects.equals(system, vendor)) {
Slog.e(TAG, "Mismatched fingerprints; system reported " + system
+ " but vendor reported " + vendor);
return false;
}
}
/* TODO: Figure out issue with checks failing
if (!TextUtils.isEmpty(bootimage)) {
if (!Objects.equals(system, bootimage)) {
Slog.e(TAG, "Mismatched fingerprints; system reported " + system
+ " but bootimage reported " + bootimage);
return false;
}
}
if (!TextUtils.isEmpty(requiredBootloader)) {
if (!Objects.equals(currentBootloader, requiredBootloader)) {
Slog.e(TAG, "Mismatched bootloader version: build requires " + requiredBootloader
+ " but runtime reports " + currentBootloader);
return false;
}
}
if (!TextUtils.isEmpty(requiredRadio)) {
if (!Objects.equals(currentRadio, requiredRadio)) {
Slog.e(TAG, "Mismatched radio version: build requires " + requiredRadio
+ " but runtime reports " + currentRadio);
return false;
}
}
*/
return true;
}
// The following properties only make sense for internal engineering builds.
public static final long TIME = getLong("ro.build.date.utc") * 1000;
public static final String USER = getString("ro.build.user");
public static final String HOST = getString("ro.build.host");
/**
* Returns true if we are running a debug build such as "user-debug" or "eng".
* @hide
*/
public static final boolean IS_DEBUGGABLE =
SystemProperties.getInt("ro.debuggable", 0) == 1;
/** {@hide} */
public static final boolean IS_ENG = "eng".equals(TYPE);
/** {@hide} */
public static final boolean IS_USERDEBUG = "userdebug".equals(TYPE);
/** {@hide} */
public static final boolean IS_USER = "user".equals(TYPE);
/**
* Whether this build is running inside a container.
*
* We should try to avoid checking this flag if possible to minimize
* unnecessarily diverging from non-container Android behavior.
* Checking this flag is acceptable when low-level resources being
* different, e.g. the availability of certain capabilities, access to
* system resources being restricted, and the fact that the host OS might
* handle some features for us.
* For higher-level behavior differences, other checks should be preferred.
* @hide
*/
public static final boolean IS_CONTAINER =
SystemProperties.getBoolean("ro.boot.container", false);
/**
* Specifies whether the permissions needed by a legacy app should be
* reviewed before any of its components can run. A legacy app is one
* with targetSdkVersion < 23, i.e apps using the old permission model.
* If review is not required, permissions are reviewed before the app
* is installed.
*
* @hide
* @removed
*/
@SystemApi
public static final boolean PERMISSIONS_REVIEW_REQUIRED =
SystemProperties.getInt("ro.permission_review_required", 0) == 1;
/**
* Returns the version string for the radio firmware. May return
* null (if, for instance, the radio is not currently on).
*/
public static String getRadioVersion() {
return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null);
}
private static String getString(String property) {
return SystemProperties.get(property, UNKNOWN);
}
private static String[] getStringList(String property, String separator) {
String value = SystemProperties.get(property);
if (value.isEmpty()) {
return new String[0];
} else {
return value.split(separator);
}
}
private static long getLong(String property) {
try {
return Long.parseLong(SystemProperties.get(property));
} catch (NumberFormatException e) {
return -1;
}
}
}