Description: android 2.3 system source code, extract and placed under sdk/platforms/android-8/sources after, Eclipse when you write code you can see the source code click on the system function
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File list (Check if you may need any files):
sources\android\accessibilityservice\AccessibilityService.java
.......\.......\....................\AccessibilityServiceInfo.java
.......\.......\....................\cts\AccessibilityEndToEndTest.java
.......\.......\....................\...\AccessibilityEndToEndTestActivity.java
.......\.......\....................\...\AccessibilityServiceInfoTest.java
.......\.......\....................\...\AccessibilitySettingsTest.java
.......\.......\....................\delegate\DelegatingAccessibilityService.java
.......\.......\...ounts\AbstractAccountAuthenticator.java
.......\.......\........\Account.java
.......\.......\........\AccountAuthenticatorActivity.java
.......\.......\........\AccountAuthenticatorCache.java
.......\.......\........\AccountAuthenticatorResponse.java
.......\.......\........\AccountManager.java
.......\.......\........\AccountManagerCallback.java
.......\.......\........\AccountManagerFuture.java
.......\.......\........\AccountManagerResponse.java
.......\.......\........\AccountManagerService.java
.......\.......\........\AccountsException.java
.......\.......\........\AuthenticatorDescription.java
.......\.......\........\AuthenticatorException.java
.......\.......\........\ChooseAccountActivity.java
.......\.......\........\cts\AccountManagerTest.java
.......\.......\........\...\MockAccountAuthenticator.java
.......\.......\........\...\MockAccountService.java
.......\.......\........\GrantCredentialsPermissionActivity.java
.......\.......\........\NetworkErrorException.java
.......\.......\........\OnAccountsUpdateListener.java
.......\.......\........\OperationCanceledException.java
.......\.......\.nnotation\cts\RequiredFeatures.java
.......\.......\..........\SdkConstant.java
.......\.......\..........\Widget.java
.......\.......\.pidemos\cts\AllTests.java
.......\.......\........\...\ApiDemosTest.java
.......\.......\..p\Activity.java
.......\.......\...\ActivityGroup.java
.......\.......\...\ActivityManager.java
.......\.......\...\ActivityManagerNative.java
.......\.......\...\ActivityThread.java
.......\.......\...\admin\DeviceAdminInfo.java
.......\.......\...\.....\DeviceAdminReceiver.java
.......\.......\...\.....\DevicePolicyManager.java
.......\.......\...\AlarmManager.java
.......\.......\...\AlertDialog.java
.......\.......\...\AliasActivity.java
.......\.......\...\AppGlobals.java
.......\.......\...\Application.java
.......\.......\...\ApplicationErrorReport.java
.......\.......\...\ApplicationLoaders.java
.......\.......\...\ApplicationThreadNative.java
.......\.......\...\backup\AbsoluteFileBackupHelper.java
.......\.......\...\......\BackupAgent.java
.......\.......\...\......\BackupAgentHelper.java
.......\.......\...\......\BackupDataInput.java
.......\.......\...\......\BackupDataInputStream.java
.......\.......\...\......\BackupDataOutput.java
.......\.......\...\......\BackupHelper.java
.......\.......\...\......\BackupHelperDispatcher.java
.......\.......\...\......\BackupManager.java
.......\.......\...\......\FileBackupHelper.java
.......\.......\...\......\FileBackupHelperBase.java
.......\.......\...\......\RestoreObserver.java
.......\.......\...\......\RestoreSession.java
.......\.......\...\......\RestoreSet.java
.......\.......\...\......\SharedPreferencesBackupHelper.java
.......\.......\...\ContextImpl.java
.......\.......\...\cts\ActivityGroupTest.java
.......\.......\...\...\ActivityManagerMemoryInfoTest.java
.......\.......\...\...\ActivityManagerProcessErrorStateInfoTest.java
.......\.......\...\...\ActivityManagerRecentOneActivity.java
.......\.......\...\...\ActivityManagerRecentTaskInfoTest.java
.......\.......\...\...\ActivityManagerRecentTwoActivity.java
.......\.......\...\...\ActivityManagerRunningTaskInfoTest.java
.......\.......\...\...\ActivityManagerStubCrashActivity.java
.......\.......\...\...\ActivityManagerStubFooActivity.java
.......\.......\...\...\ActivityManagerTest.java
.......\.......\...\...\ActivityManager_RunningAppProcessInfoTest.java
.......\.......\...\...\ActivityManager_RunningServiceInfoTest.java
.......\.......\...\...\Activi