解决android socket编程出现的Caused by: android.os.NetworkOnMainThreadException错误

我复制了http://www.cnblogs.com/lknlfy/archive/2012/03/03/2378669.html的关于socket通信的代码运行,期间server端打开后异常关闭,在logcat中查看到了

Caused by: android.os.NetworkOnMainThreadException错误,在http://stackoverflow.com/questions/13136539/caused-by-android-os-networkonmainthreadexception找到了答案

,要在MainActivity.java的setContentView(R.layout.activity_main)后加入以下代码

if (android.os.Build.VERSION.SDK_INT > 9) {
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);
}
并在文件头加入,import android.os.StrictMode
问题解决

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