Android studio java.lang.NoClassDefFoundError: android.support.v4.app.NavUtilsJB

Question

This is my error log acheived with android studio 1.0.2

02-03 13:05:23.831    8385-8385/com.******.*******E/AndroidRuntime﹕     FATAL EXCEPTION: main
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Answer 1

In our case we got this error when we updated "support-v4" lib from 19 to 24 version.

Version 19 contains NavUtilsJB class:

But version 24 does not contain NavUtilsJB class:

Solution for this issue was just to create NavUtilsJB class inside our project:

package android.support.v4.app;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;

class NavUtilsJB {
    public static Intent getParentActivityIntent(Activity activity) {
        return activity.getParentActivityIntent();
    }
    public static boolean shouldUpRecreateTask(Activity activity, Intent targetIntent) {
        return activity.shouldUpRecreateTask(targetIntent);
    }
    public static void navigateUpTo(Activity activity, Intent upIntent) {
        activity.navigateUpTo(upIntent);
    }
    public static String getParentActivityName(ActivityInfo info) {
        return info.parentActivityName;
    }
}