Android-Android(安卓)API 版本判断
1.Version 类
/** * 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"); /** A hardware serial number, if available. Alphanumeric only, case-insensitive. */ public static final String SERIAL = getString("ro.serialno"); /** * 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 user-visible SDK version of the framework; its possible * values are defined in {@link Build.VERSION_CODES}. */ public static final int SDK_INT = SystemProperties.getInt( "ro.build.version.sdk", 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 */ public static final int RESOURCES_SDK_INT = SDK_INT + ACTIVE_CODENAMES.length; } /** * 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 = 10000; /** * 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 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; /** * 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; /** * 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; /** * Lollipop with an extra sugar coating on the outside! */ public static final int LOLLIPOP_MR1 = 22; /** * M comes after L. */ public static final int M = 23; }
2.判断方法
判断当前API版本是否大于 Andorid 4.1 ://兼容性实现if(Build.VERSION.SDK_INT
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