Android-support-v4.jar obfuscation Error

Obfuscated the project, but found the following errors:

[Java] Warning: Android. Support. v4.view. Accessibility. accessibilitynodeprovidercompatjellybean $ 1 : Can '  T find superclass or interface Android. View. Accessibility. accessibilitynodeprovider [Java] Warning: Android. Support. v4.app. navutilsjb: Can '  T find referenced method  ' Android. content. Intent getparentactivityintent () '  In class android. App. Activity [Java] Warning: Android. Support. v4.app. navutilsjb: Can ' T find referenced method  ' Boolean shoulduprecreatetask (Android. content. Intent) '  In class android. App. Activity [Java] Warning: Android. Support. v4.app. navutilsjb: Can '  T find referenced method  ' Boolean navigateupto (Android. content. Intent) '  In class android. App. Activity [Java] Warning: Android. Support. v4.app. navutilsjb: Can '  T find referenced Field ' Java. Lang. String parentactivityname '  In class android. content. PM. activityinfo [Java] Warning: Android. Support. v4.app. icationicationcompatjellybean: Can '  T find referenced method  ' Android. App. Notification $ builder setsubtext (Java. Lang. charsequence) '  In class android. App. Notification $ Builder [Java] Warning: Android. Support. v4.app. icationicationcompatjellybean: Can '  T find referenced method ' Android. App. Notification $ builder setuseschronometer (Boolean) '  In class android. App. Notification $ Builder [Java] Warning: Android. Support. v4.app. icationicationcompatjellybean: Can '  T find referenced method  ' Android. App. Notification $ builder setpriority ( Int ) '  In class android. App. Notification $ Builder [Java] Warning: Android. Support. v4.app. icationicationcompatjellybean: Can ' T find referenced method  ' Android. App. Notification $ builder addaction ( Int , Java. Lang. charsequence, Android. App. pendingintent) '  In class android. App. Notification $ Builder  
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Since the previous obfuscation of this android-support-v4.jar package was okay,

Can think of the problem: the current android-support-v4.jar jar package, indeed, when the project was built, the default project is

Use the latest API-17 to build the project, so the system uses the android-support-v4.jar jar package that supports 4.1 jelly bean by default,

When packaging, the API-level can be adjusted to> = 16, or replace/libs/android-support-v4.jar with older versions.