Android 4.0或更高版本上的应用程序出现java错误

Question

应用程序启动时没有问题，但在最后一步关闭时：不幸的是，“YOURAPP”已停止

Log Cat给了我以下输出，但我不明白真正的问题在哪里：

01-02 10:39:05.634: W/NetworkManagementSocketTagger(90): setKernelCountSet(10005, 0) failed with errno -2
01-02 10:39:05.644: W/InputManagerService(90): Starting input on non-focused client com.安卓.internal.view.IInputMethodClient$Stub$Proxy@41ac4678 (uid=10005 pid=203)
01-02 10:39:22.314: D/AndroidRuntime(565): Shutting down VM
01-02 10:39:22.314: W/dalvikvm(565): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
01-02 10:39:22.394: E/AndroidRuntime(565): FATAL EXCEPTION: main
01-02 10:39:22.394: E/AndroidRuntime(565): java.lang.IllegalStateException: Could not execute method of the activity
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.view.View$1.onClick(View.java:3039)
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.view.View.performClick(View.java:3480)
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.view.View$PerformClick.run(View.java:13983)
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.os.Handler.handleCallback(Handler.java:605)
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.os.Handler.dispatchMessage(Handler.java:92)
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.os.Looper.loop(Looper.java:137)
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.app.ActivityThread.main(ActivityThread.java:4340)
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.lang.reflect.Method.invokeNative(Native Method)
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.lang.reflect.Method.invoke(Method.java:511)
01-02 10:39:22.394: E/AndroidRuntime(565):  at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-02 10:39:22.394: E/AndroidRuntime(565):  at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-02 10:39:22.394: E/AndroidRuntime(565):  at dalvik.system.NativeStart.main(Native Method)
01-02 10:39:22.394: E/AndroidRuntime(565): Caused by: java.lang.reflect.InvocationTargetException
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.lang.reflect.Method.invokeNative(Native Method)
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.lang.reflect.Method.invoke(Method.java:511)
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.view.View$1.onClick(View.java:3034)
01-02 10:39:22.394: E/AndroidRuntime(565):  ... 11 more
01-02 10:39:22.394: E/AndroidRuntime(565): Caused by: 安卓.os.NetworkOnMainThreadException
01-02 10:39:22.394: E/AndroidRuntime(565):  at 安卓.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1084)
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.net.InetAddress.getAllByName(InetAddress.java:220)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:71)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
01-02 10:39:22.394: E/AndroidRuntime(565):  at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
01-02 10:39:22.394: E/AndroidRuntime(565):  at java.net.URL.openStream(URL.java:462)
01-02 10:39:22.394: E/AndroidRuntime(565):  at at.mav.abc2.MainActivity.letzteseiteClick(MainActivity.java:267)
01-02 10:39:22.394: E/AndroidRuntime(565):  ... 14 more
01-02 10:39:22.614: W/ActivityManager(90):   Force finishing activity at.mav.abc2/.MainActivity
01-02 10:39:22.614: W/WindowManager(90): Failure taking screenshot for (240x394) to layer 21010
01-02 10:39:22.754: I/WindowManager(90): createSurface Window{41b1a098  paused=false}: DRAW NOW PENDING
01-02 10:39:22.824: D/dalvikvm(565): GC_CONCURRENT freed 298K, 3% free 14173K/14599K, paused 17ms+61ms
01-02 10:39:23.169: W/ActivityManager(90): Activity pause timeout for ActivityRecord{41a86108 at.mav.abc2/.MainActivity}
01-02 10:39:23.216: W/NetworkManagementSocketTagger(90): setKernelCountSet(10005, 1) failed with errno -2
01-02 10:39:23.354: I/WindowManager(90): createSurface Window{41a70210 com.安卓.launcher/com.安卓.launcher2.Launcher paused=false}: DRAW NOW PENDING
01-02 10:39:24.404: W/NetworkManagementSocketTagger(90): setKernelCountSet(10040, 0) failed with errno -2
01-02 10:39:26.274: I/Process(565): Sending signal. PID: 565 SIG: 9
01-02 10:39:26.315: I/WindowManager(90): WIN DEATH: Window{41a66820 at.mav.abc2/at.mav.abc2.MainActivity paused=false}
01-02 10:39:26.315: I/ActivityManager(90): Process at.mav.abc2 (pid 565) has died.
01-02 10:39:26.444: W/InputManagerService(90): Got RemoteException sending setActive(false) notification to pid 565 uid 10040
01-02 10:39:34.248: W/ActivityManager(90): Activity destroy timeout for ActivityRecord{41a86108 at.mav.abc2/.MainActivity}

在安卓1.6、2.1、2.3.3上没有问题。它只在4.0或更高版本中出现