Android 4.3에서 앱 충돌

개발하려는 Android 앱에 문제가 있습니다. android 4.4.2 (대상 SDK 버전)로 에뮬레이터에서 테스트하면 모든 것이 잘 작동합니다. 그러나 동일한 설정을 사용하는 에뮬레이터에서 동일한 코드를 실행하지만 대신 Android 4.3을 실행하면 앱이 거의 즉시 아래의 catlog 오류와 함께 충돌합니다.

Eclipse에서 Android Lint를 사용하면 (프로젝트를 마우스 오른쪽 버튼으로 클릭하고 "Android 도구"> "린트 실행 : 일반적인 오류 확인") minSdkVersion (16)과 일치하지 않는 코드를 찾을 수 없습니다.

누구든지 무엇이 잘못되었는지 제안을 받았습니까?

카탈로그 오류 :

    07-24 12:54:14.592: D/AndroidRuntime(1012): Shutting down VM
    07-24 12:54:14.592: W/dalvikvm(1012): threadid=1: thread exiting with uncaught exception (group=0x41465700)
    07-24 12:54:14.631: E/AndroidRuntime(1012): FATAL EXCEPTION: main
    07-24 12:54:14.631: E/AndroidRuntime(1012): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.protime360_basics/com.example.protime360_basics.MainActivity}: java.lang.NullPointerException
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.os.Handler.dispatchMessage(Handler.java:99)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.os.Looper.loop(Looper.java:137)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.ActivityThread.main(ActivityThread.java:5103)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at java.lang.reflect.Method.invokeNative(Native Method)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at java.lang.reflect.Method.invoke(Method.java:525)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at dalvik.system.NativeStart.main(Native Method)
    07-24 12:54:14.631: E/AndroidRuntime(1012): Caused by: java.lang.NullPointerException
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at com.example.protime360_basics.MainActivity.loginPopup(MainActivity.java:167)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at com.example.protime360_basics.MainActivity.onCreate(MainActivity.java:61)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.Activity.performCreate(Activity.java:5133)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
    07-24 12:54:14.631: E/AndroidRuntime(1012):     ... 11 more