我由Android Studio错误回报......我导入该项目Eclipse项目到Android工作室..登录猫:产生的原因:显示java.lang.NullPointerException:锁== NULL
7-26 13:51:07.008 1761-1761/...tutorial E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: ....tutorial, PID: 1761
java.lang.RuntimeException: Unable to start activity ComponentInfo{...tutorial/...tutorial.SimpleListActivity}: java.lang.NullPointerException: lock == null
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException: lock == null
at java.io.Reader.<init>(Reader.java:64)
任何想法?谢谢...
你的锁变量是什么? – Joseph
我需要更多的源代码信息,你试着读onCreate Acivity方法的一些文件? – Joseph
你确定这是整个堆栈跟踪吗?我不希望有'java.io.Reader。'成为堆栈中的第一个呼叫。 (在大多数情况下,后面的所有内容都比以前更有趣) –
fabian