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Where to get the NavUtil class?

I use NavUtils (http://developer.android.com/reference/android/support/v4/app/NavUtils.html)in v4 android compatibility libraries for Efficency Navigation. It looks like the v4 jar does not contain this class . Also, it seems that NavUtils is not in the main branch of the Android support project.

Can someone tell me how to get NavUtils?

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I think the android-support-v4.jar in your calculation is the old version. therefore you must update your library. The latest support for v4 is 8.

Use the Android SDK Manager to check the latest version.

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