Alguém sabe como resolver?
05-13 15:54:50.117: I/System.out(1525): Envelope enviando para Web-service buscarTodosUsuarios: org.ksoap2.serialization.SoapSerializationEnvelope@a0c6d428
05-13 15:54:50.117: I/System.out(1525): Http buscarTodosUsuarios: org.ksoap2.transport.HttpTransportSE@a0c6eb90
05-13 15:54:50.707: W/System.err(1525): org.xmlpull.v1.XmlPullParserException: unexpected type (position:END_DOCUMENT null@1:1 in java.io.InputStreamReader@a0c7e4c8)
05-13 15:54:50.707: W/System.err(1525): at org.kxml2.io.KXmlParser.nextTag(KXmlParser.java:2035)
05-13 15:54:50.707: W/System.err(1525): at org.ksoap2.SoapEnvelope.parse(SoapEnvelope.java:126)
05-13 15:54:50.707: W/System.err(1525): at org.ksoap2.transport.Transport.parseResponse(Transport.java:96)
05-13 15:54:50.707: W/System.err(1525): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:189)
05-13 15:54:50.707: W/System.err(1525): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:95)
05-13 15:54:50.707: W/System.err(1525): at com.tkcsapcd.tkcsapcdservice.Usuario2DAO.buscarTodosUsuarios(Usuario2DAO.java:108)
05-13 15:54:50.707: W/System.err(1525): at com.tkcsapcd.tkcsapcdservice.MainActivity.onCreate(MainActivity.java:37)
05-13 15:54:50.707: W/System.err(1525): at android.app.Activity.performCreate(Activity.java:4466)
05-13 15:54:50.707: W/System.err(1525): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-13 15:54:50.707: W/System.err(1525): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
05-13 15:54:50.707: W/System.err(1525): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
05-13 15:54:50.707: W/System.err(1525): at android.app.ActivityThread.access$600(ActivityThread.java:123)
05-13 15:54:50.707: W/System.err(1525): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
05-13 15:54:50.707: W/System.err(1525): at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 15:54:50.707: W/System.err(1525): at android.os.Looper.loop(Looper.java:137)
05-13 15:54:50.707: W/System.err(1525): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-13 15:54:50.707: W/System.err(1525): at java.lang.reflect.Method.invokeNative(Native Method)
05-13 15:54:50.707: W/System.err(1525): at java.lang.reflect.Method.invoke(Method.java:511)
05-13 15:54:50.707: W/System.err(1525): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-13 15:54:50.707: W/System.err(1525): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-13 15:54:50.707: W/System.err(1525): at dalvik.system.NativeStart.main(Native Method)
05-13 15:54:50.707: I/System.out(1525): Erro ao buscar todos os usuários: org.xmlpull.v1.XmlPullParserException: unexpected type (position:END_DOCUMENT null@1:1 in java.io.InputStreamReader@a0c7e4c8)
05-13 15:54:50.707: D/AndroidRuntime(1525): Shutting down VM
05-13 15:54:50.707: W/dalvikvm(1525): threadid=1: thread exiting with uncaught exception (group=0xa000f180)
05-13 15:54:50.707: E/AndroidRuntime(1525): FATAL EXCEPTION: main
05-13 15:54:50.707: E/AndroidRuntime(1525): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tkcsapcd.tkcsapcdservice/com.tkcsapcd.tkcsapcdservice.MainActivity}: java.lang.NullPointerException
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.ActivityThread.access$600(ActivityThread.java:123)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.os.Looper.loop(Looper.java:137)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-13 15:54:50.707: E/AndroidRuntime(1525): at java.lang.reflect.Method.invokeNative(Native Method)
05-13 15:54:50.707: E/AndroidRuntime(1525): at java.lang.reflect.Method.invoke(Method.java:511)
05-13 15:54:50.707: E/AndroidRuntime(1525): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-13 15:54:50.707: E/AndroidRuntime(1525): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-13 15:54:50.707: E/AndroidRuntime(1525): at dalvik.system.NativeStart.main(Native Method)
05-13 15:54:50.707: E/AndroidRuntime(1525): Caused by: java.lang.NullPointerException
05-13 15:54:50.707: E/AndroidRuntime(1525): at com.tkcsapcd.tkcsapcdservice.MainActivity.onCreate(MainActivity.java:38)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.Activity.performCreate(Activity.java:4466)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-13 15:54:50.707: E/AndroidRuntime(1525): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
05-13 15:54:50.707: E/AndroidRuntime(1525): … 11 more
05-13 15:54:51.347: I/dalvikvm(1525): threadid=3: reacting to signal 3
05-13 15:54:51.347: I/dalvikvm(1525): Wrote stack traces to '/data/anr/traces.txt’
05-13 15:57:44.337: I/Process(1525): Sending signal. PID: 1525 SIG: 9