2013-05-25 92 views
-1

我真的很陌生,所以有可能我的錯是非常愚蠢的..但是我的應用程序崩潰沒有任何可見的原因。Android應用程序沒有任何原因崩潰

我logcat的輸出:

05-25 19:15:25.656: D/dalvikvm(25858): threadid=1: still suspended after undo (sc=1 dc=1) 
05-25 19:15:30.171: D/AndroidRuntime(25858): Shutting down VM 
05-25 19:15:30.171: W/dalvikvm(25858): threadid=1: thread exiting with uncaught exception (group=0x40e1aa08) 
05-25 19:15:30.251: E/AndroidRuntime(25858): FATAL EXCEPTION: main 
05-25 19:15:30.251: E/AndroidRuntime(25858): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{de.mo.securegate/de.mo.securegate.MainActivity}: java.lang.NullPointerException 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2228) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2362) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.app.ActivityThread.access$600(ActivityThread.java:156) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1250) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.os.Handler.dispatchMessage(Handler.java:99) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.os.Looper.loop(Looper.java:137) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.app.ActivityThread.main(ActivityThread.java:5229) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at java.lang.reflect.Method.invokeNative(Native Method) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at java.lang.reflect.Method.invoke(Method.java:525) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:799) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at dalvik.system.NativeStart.main(Native Method) 
05-25 19:15:30.251: E/AndroidRuntime(25858): Caused by: java.lang.NullPointerException 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.content.ContextWrapper.getSharedPreferences(ContextWrapper.java:161) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at de.mo.securegate.MainActivity.<init>(MainActivity.java:28) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at java.lang.Class.newInstanceImpl(Native Method) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at java.lang.Class.newInstance(Class.java:1319) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 
05-25 19:15:30.251: E/AndroidRuntime(25858): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2219) 
05-25 19:15:30.251: E/AndroidRuntime(25858): ... 11 more 

什麼想法?

+4

我所知道的總是有一個原因。在實例化活動時看起來像是一個NullPointerExeption。你有沒有在ContextWrapper.java中檢查第161行? –

+0

行號28在MainActivity導致NPE。炫耀這條線。 – Sunny

+2

您可能試圖在方法外部獲得'SharedPreferences'。發佈代碼 – codeMagic

回答

3

第28行MainActivity在嘗試讀取某些共享首選項時拋出NullPointerException。這就是你的logcat說:

at android.content.ContextWrapper.getSharedPreferences(ContextWrapper.java:161) 
at de.mo.securegate.MainActivity.<init>(MainActivity.java:28)