Android 앱을 기기에서 실행할 수 없습니다.

Question

Android 앱에서 앱을 개발 중이며 구문 오류가 없습니다. 내 기기에 내 앱을 배포하면 다음과 같은 logcat 오류가 발생합니다.

이 당신이 당신의 레이아웃 구성 요소 중 하나를 팽창하는 것을 잊었다하지만이 클래스에서 사용하려고 할 때이 일반적으로 발생하는 다음과 같은 로그 캣 오류

  12-01 01:52:10.310: E/Trace(7853): error opening trace file: No such file or directory (2) 
      12-01 01:52:10.310: D/ActivityThread(7853): setTargetHeapUtilization:0.75 
      12-01 01:52:10.310: D/ActivityThread(7853): setTargetHeapIdealFree:8388608 
      12-01 01:52:10.310: D/ActivityThread(7853): setTargetHeapConcurrentStart:2097152 
      12-01 01:52:10.380: W/dalvikvm(7853): Refusing to reopen boot DEX '/system/framework/hwframework.jar' 
      12-01 01:52:10.660: I/ActivityThread(7853): Pub com.aiou.fyp.provider: com.aiou.fyp.DataProvider 
      12-01 01:52:11.070: W/dalvikvm(7853): threadid=1: thread exiting with uncaught exception (group=0x42022438) 
      12-01 01:52:11.090: E/AndroidRuntime(7853): FATAL EXCEPTION: main 
      12-01 01:52:11.090: E/AndroidRuntime(7853): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aiou.fyp/com.aiou.fyp.MainActivity}: java.lang.NullPointerException 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2077) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2102) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.ActivityThread.access$600(ActivityThread.java:137) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.os.Handler.dispatchMessage(Handler.java:99) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.os.Looper.loop(Looper.java:137) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.ActivityThread.main(ActivityThread.java:4838) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at java.lang.reflect.Method.invokeNative(Native Method) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at java.lang.reflect.Method.invoke(Method.java:511) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:874) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:641) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at dalvik.system.NativeStart.main(Native Method) 
      12-01 01:52:11.090: E/AndroidRuntime(7853): Caused by: java.lang.NullPointerException 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at com.aiou.fyp.MainActivity.onCreate(MainActivity.java:53) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.Activity.performCreate(Activity.java:5010) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2041) 
      12-01 01:52:11.090: E/AndroidRuntime(7853):  ... 11 more 

Answer 1

은 프로젝트.