입니다 : 09-13 18 : 12 : 33.119 : E안드로이드 : 나는 데이터베이스에 액세스하려고 할 경우 getWritableDatabase (에 NullPointerException이) 여기
01 23,516,RROR/AndroidRuntime(7488): FATAL EXCEPTION: main
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): java.lang.NullPointerException
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:98)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at com.basind.testapp.database.UserDataAdapter.open(UserDataAdapter.java:29)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at com.basind.testapp.FetchNetworks.addToDatabase(FetchNetworks.java:107)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at com.basind.testapp.FetchNetworks.access$1(FetchNetworks.java:105)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at com.basind.testapp.FetchNetworks$1.onResponseReceived(FetchNetworks.java:75)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at com.basind.testapp.async.CallbackWrapper.run(CallbackWrapper.java:15)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at android.os.Handler.handleCallback(Handler.java:587)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at android.os.Handler.dispatchMessage(Handler.java:92)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at android.os.Looper.loop(Looper.java:145)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at android.app.ActivityThread.main(ActivityThread.java:4937)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at java.lang.reflect.Method.invokeNative(Native Method)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at java.lang.reflect.Method.invoke(Method.java:521)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-13 18:12:33.119: ERROR/AndroidRuntime(7488): at dalvik.system.NativeStart.main(Native Method)
기타 자세한 사항 :
- 대상 : HTC
어디에서 UserDataAdapter를 인스턴스화합니까? 이 클래스를 인스턴스화하는 클래스의 코드를 포함 할 수 있습니까? @ Adil은 귀하의 컨텍스트가 어떻게 든 null이라는 것이 맞습니다. 이유를 이해해야합니다. – momo