java Androidsocket客户端不工作
我试图像这样创建一个到python服务器的socket客户端连接,但它给我带来了一个错误。这是通过一个按钮触发的,该按钮起作用。服务器在RPi上运行,但这不是问题所在,因为Python客户端在我的PC上工作
try {
Socket s = new Socket("192.168.178.43", 24069);
InputStreamReader streamReader = new InputStreamReader(s.getInputStream());
BufferedReader reader = new BufferedReader(streamReader);
String advice = reader.readLine();
reader.close();
} catch (UnknownHostException e) {
System.err.println("Unknown Host.");
// System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for "
+ "the connection.");
System.err.println(e);
// System.exit(1);
}
堆栈跟踪:
java.lang.IllegalStateException: Could not execute method of the activity
at 安卓.view.View$1.onClick(View.java:3823)
at 安卓.view.View.performClick(View.java:4438)
at 安卓.view.View$PerformClick.run(View.java:18422)
at 安卓.os.Handler.handleCallback(Handler.java:733)
at 安卓.os.Handler.dispatchMessage(Handler.java:95)
at 安卓.os.Looper.loop(Looper.java:136)
at 安卓.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.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at 安卓.view.View$1.onClick(View.java:3818)
at 安卓.view.View.performClick(View.java:4438)
at 安卓.view.View$PerformClick.run(View.java:18422)
at 安卓.os.Handler.handleCallback(Handler.java:733)
at 安卓.os.Handler.dispatchMessage(Handler.java:95)
at 安卓.os.Looper.loop(Looper.java:136)
at 安卓.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.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: 安卓.os.NetworkOnMainThreadException
at 安卓.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1145)
at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
at libcore.io.IoBridge.connect(IoBridge.java:112)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.Socket.startupSocket(Socket.java:567)
at java.net.Socket.tryAllAddresses(Socket.java:128)
at java.net.Socket.<init>(Socket.java:178)
at java.net.Socket.<init>(Socket.java:150)
at com.example.app.MainActivity.sendMessage(MainActivity.java:65)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at 安卓.view.View$1.onClick(View.java:3818)
at 安卓.view.View.performClick(View.java:4438)
at 安卓.view.View$PerformClick.run(View.java:18422)
at 安卓.os.Handler.handleCallback(Handler.java:733)
at 安卓.os.Handler.dispatchMessage(Handler.java:95)
at 安卓.os.Looper.loop(Looper.java:136)
at 安卓.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.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
# 1 楼答案
你不能在主UI线程上进行任何长时间处理。原因是,如果操作失败,可以避免应用程序崩溃
尝试创建新的线程并在其中完成工作,如果你想将任何结果传递给你无法使用的UI
或者
这是一个示例,说明了您可以做什么,也可以使用asynctask来代替