java - NoClassDefFoundError on implementing Runnable class in android studio -


i keep getting noclassdeffounderror on code. here code:

handler.postdelayed(check = new runnable() {         @override         public void run() {             if (foreground && paused) {                 foreground = false;                 log.i(tag, "went background");                 (listener l : listeners) {                     try {                         l.onbecamebackground();                     } catch (exception exc) {                         log.e(tag, "listener threw exception!", exc);                     }                 }             } else {                 log.i(tag, "still foreground");             }         }     }     , check_delay);

the error occurs on assigning new runnable() check

i tried separating runnable, , tried no success

final runnable temp = new runnable() {         @override         public void run() {             if (foreground && paused) {                 foreground = false;                 log.i(tag, "went background");                 (listener l : listeners) {                     try {                         l.onbecamebackground();                     } catch (exception exc) {                         log.e(tag, "listener threw exception!", exc);                     }                 }             } else {                 log.i(tag, "still foreground");             }         }     };      handler.postdelayed(check = new runnable() {         @override         public void run() {             if (foreground && paused) {                 foreground = false;                 log.i(tag, "went background");                 (listener l : listeners) {                     try {                         l.onbecamebackground();                     } catch (exception exc) {                         log.e(tag, "listener threw exception!", exc);                     }                 }             } else {                 log.i(tag, "still foreground");             }         }     }     , check_delay);

the error appears on line final runnable temp = new runnable() {

what happened? check compiled classes , files there. class , $ class. there solution or alternative?

edit (add error log):

08-31 10:54:51.672  17887-17887/com.travelio.traveliochatapp e/androidruntime﹕ fatal exception: main process: com.travelio.traveliochatapp, pid: 17887 java.lang.noclassdeffounderror: com.travelio.traveliochatapp.misc.foregroundhelper$1         @ com.travelio.traveliochatapp.misc.foregroundhelper.onactivitypaused(foregroundhelper.java:159)         @ android.app.application.dispatchactivitypaused(application.java:217)         @ android.app.activity.onpause(activity.java:1287)         @ com.travelio.traveliochatapp.splashactivity.onpause(splashactivity.java:79)         @ android.app.activity.performpause(activity.java:5335)         @ android.app.instrumentation.callactivityonpause(instrumentation.java:1233)         @ android.app.activitythread.performpauseactivity(activitythread.java:3138)         @ android.app.activitythread.performpauseactivity(activitythread.java:3107)         @ android.app.activitythread.handlepauseactivity(activitythread.java:3085)         @ android.app.activitythread.access$1000(activitythread.java:144)         @ android.app.activitythread$h.handlemessage(activitythread.java:1257)         @ android.os.handler.dispatchmessage(handler.java:102)         @ android.os.looper.loop(looper.java:212)         @ android.app.activitythread.main(activitythread.java:5137)         @ java.lang.reflect.method.invokenative(native method)         @ java.lang.reflect.method.invoke(method.java:515)         @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:902)         @ com.android.internal.os.zygoteinit.main(zygoteinit.java:718)         @ dalvik.system.nativestart.main(native method)

ah, got it. use multidex in application , forgot add android:name="android.support.multidex.multidexapplication" in androidmanifest.xml. adding solve problem although chose trim codes wouldn't have use multidex


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