android 网络 小错误

1、汉字传输 乱码，只用用在网络传输上（例如android手机和服务器之间）

InputStreamReader read = new InputStreamReader(new FileInputStream(f),"UTF-8"); BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream(),"UTF-8"));

2、 android.os.NetworkOnMainThreadException 设置线程链接网路，

3 、android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.子线程不能改变UI