android error - java.lang.NoClassDefFoundError with AsyncHttpClient - API 19

java.lang.NoClassDefFoundError with AsyncHttpClient - API 19

Q : Process: com.example.gta.fab1, PID: 5775

            java.lang.NoClassDefFoundError: com.loopj.android.http.AsyncHttpClient
                at com.example.gta.fab1.TabFragments.WhoFragment.uploadToServer(WhoFragment.java:129)
                at com.example.gta.fab1.TabFragments.WhoFragment.access$100(WhoFragment.java:41)
                at com.example.gta.fab1.TabFragments.WhoFragment$1.onClick(WhoFragment.java:85)
                at com.facebook.FacebookButtonBase.callExternalOnClickListener(FacebookButtonBase.java:216)
                at com.facebook.share.widget.ShareButtonBase.access$000(ShareButtonBase.java:39)
                at com.facebook.share.widget.ShareButtonBase$1.onClick(ShareButtonBase.java:167)
                at com.facebook.FacebookButtonBase$1.onClick(FacebookButtonBase.java:385)
                at android.view.View.performClick(View.java:4438)
                at android.view.View$PerformClick.run(View.java:18422)
                at android.os.Handler.handleCallback(Handler.java:733)

A : Found it !! Its a waste of time using this library now, just notice that it running on API 23 and above !! WTF !!

https://loopj.com/android-async-http/

Who needs library for 23 and above... sick, will search for a more reliable one.

Thanks to everyone that helped me on this issue.

A2: 

1. Enable multidex

   defaultConfig {
   ...
    // Enabling multidex support.
   multiDexEnabled true
   }

2. Add dependency

   dependencies {
       compile 'com.android.support:multidex:1.0.1'
   }

3. Add codes in your application

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

That worked for me, i hope it is helpful for you.