我无法弄清楚如何解决此错误.我对Android和Java非常环保,因此代码将非常有用以及解释.有任何想法吗？谢谢.
LogCat:
FATAL EXCEPTION: main
ERROR/AndroidRuntime(13527): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx.xxx/com.xxx.xxx.AC.List_AC}: java.lang.IllegalStateException: System services not available to Activities before onCreate()
ERROR/AndroidRuntime(13527): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
ERROR/AndroidRuntime(13527): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
ERROR/AndroidRuntime(13527): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
ERROR/AndroidRuntime(13527): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
ERROR/AndroidRuntime(13527): at android.os.Handler.dispatchMessage(Handler.java:99)
ERROR/AndroidRuntime(13527): at android.os.Looper.loop(Looper.java:123)
ERROR/AndroidRuntime(13527): at android.app.ActivityThread.main(ActivityThread.java:4627)
ERROR/AndroidRuntime(13527): at java.lang.reflect.Method.invokeNative(Native Method)
ERROR/AndroidRuntime(13527): at java.lang.reflect.Method.invoke(Method.java:521)
ERROR/AndroidRuntime(13527): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
ERROR/AndroidRuntime(13527): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
ERROR/AndroidRuntime(13527): at dalvik.system.NativeStart.main(Native Method)
ERROR/AndroidRuntime(13527): Caused by: java.lang.IllegalStateException: System services not available to Activities before onCreate()
ERROR/AndroidRuntime(13527): at android.app.Activity.getSystemService(Activity.java:3526)
ERROR/AndroidRuntime(13527): at android.widget.ResourceCursorAdapter.<init>(ResourceCursorAdapter.java:49)
ERROR/AndroidRuntime(13527): at android.widget.SimpleCursorAdapter.<init>(SimpleCursorAdapter.java:84) …