Android Studio Java.lang.NoClassDefFoundError: Android.support.v4.app.NavUtilsJB

Answer :

I had this problem and just found the solution - answer is RTFM! Here are the instructions: https://developer.android.com/tools/building/multidex.html

Multidexing is a new feature and so requires a support library to be compatible with pre-lollipop devices. You need to add the following to your gradle file dependencies:

compile 'com.android.support:multidex:1.0.0' 

Also enable multidex output in your gradle file:

android {     compileSdkVersion 21     buildToolsVersion "21.1.0"      defaultConfig {         ...         minSdkVersion 14         targetSdkVersion 21         ...          // Enabling multidex support.         multiDexEnabled true     } } 

And then add the multidex support application to your manifest:

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.example.android.multidex.myapplication">     <application         ...         android:name="android.support.multidex.MultiDexApplication">         ...     </application> </manifest> 

Note: If your app already extends the Application class, you can override the attachBaseContext() method and call MultiDex.install(this) to enable multidex. For more information, see the MultiDexApplication reference documentation.

@Override protected void attachBaseContext(Context context) {     super.attachBaseContext(context);     MultiDex.install(this); } 

Again, see the instruction above for more information...

Hope this helps

Was stuck for hours due to this issue but finally got the solution.

Step#1:

dependencies { compile 'com.android.support:multidex:1.0.0' } 

Step#2:

defaultConfig {         multiDexEnabled true     } 

Step#3:

public class AppController extends Application {     @Override     public void onCreate() {         super.onCreate();         MultiDex.install(this);     } } 

Happy coding!

Following solution worked for me:

1. Add multiDexEnabled = true in your default Config

2. Add compile com.android.support:multidex:1.0.0 in your dependencies

3. Application class extend MultiDexApplication instead of just Application