(? The extracted source code of Android 4.0 API is Android Jar source code, so that you can detect the implementation of Android API in the project when Eclipse is related to the source code.
android\accessibilityservice\AccessibilityService.java
android\accessibilityservice\AccessibilityServiceInfo.aidl
android\accessibilityservice\AccessibilityServiceInfo.java
android\accessibilityservice\IAccessibilityServiceConnection.aidl
android\accessibilityservice\IEventListener.aidl
android\accessibilityservice\package.html
android\accounts\AbstractAccountAuthenticator.java
android\accounts\Account.aidl
android\accounts\Account.java
android\accounts\AccountAuthenticatorActivity.java
android\accounts\AccountAuthenticatorCache.java
android\accounts\AccountAuthenticatorResponse.java
android\accounts\AccountManager.java
android\accounts\AccountManagerCallback.java
android\accounts\AccountManagerFuture.java
android\accounts\AccountManagerResponse.java
android\accounts\AccountManagerService.java
android\accounts\AccountsException.java
android\accounts\AuthenticatorDescription.aidl
android\accounts\AuthenticatorDescription.java
android\accounts\AuthenticatorException.java
android\accounts\ChooseAccountActivity.java
android\accounts\ChooseAccountTypeActivity.java
android\accounts\ChooseTypeAndAccountActivity.java
android\accounts\GrantCredentialsPermissionActivity.java
android\accounts\IAccountAuthenticator.aidl
android\accounts\IAccountAuthenticatorCache.java
android\accounts\IAccountAuthenticatorResponse.aidl
android\accounts\IAccountManager.aidl
android\accounts\IAccountManagerResponse.aidl
.....)