Caused by: io.netty.channel.ChannelException: Failed to open a socket.
at io.netty.channel.socket.nio.NioSocketChannel.newSocket(NioSocketChannel.java:63)
at io.netty.channel.socket.nio.NioSocketChannel.(NioSocketChannel.java:80)
at io.netty.channel.socket.nio.NioSocketChannel.(NioSocketChannel.java:73)
at java.lang.Class.newInstance(Native Method)
at io.netty.channel.ReflectiveChannelFactory.newChannel(ReflectiveChannelFactory.java:38)
at io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:319)
at io.netty.bootstrap.Bootstrap.doResolveAndConnect(Bootstrap.java:163)
at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:119)
at com.client.Client.connect(Client.java:43)
at com.example.shx.serachnote.Main.onCreate(Main.java:43)
at android.app.Activity.performCreate(Activity.java:6664)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Caused by: java.net.SocketException: Permission denied
at sun.nio.ch.Net.socket0(Native Method)
at sun.nio.ch.Net.socket(Net.java:433)
at sun.nio.ch.Net.socket(Net.java:426)
at sun.nio.ch.SocketChannelImpl.(SocketChannelImpl.java:107)
at sun.nio.ch.SelectorProviderImpl.openSocketChannel(SelectorProviderImpl.java:60)
at io.netty.channel.socket.nio.NioSocketChannel.newSocket(NioSocketChannel.java:61)
at io.netty.channel.socket.nio.NioSocketChannel.(NioSocketChannel.java:80)
at io.netty.channel.socket.nio.NioSocketChannel.(NioSocketChannel.java:73)
at java.lang.Class.newInstance(Native Method)
at io.netty.channel.ReflectiveChannelFactory.newChannel(ReflectiveChannelFactory.java:38)
at io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:319)
at io.netty.bootstrap.Bootstrap.doResolveAndConnect(Bootstrap.java:163)
at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:119)
at com.client.Client.connect(Client.java:43)
at com.example.shx.serachnote.Main.onCreate(Main.java:43)
at android.app.Activity.performCreate(Activity.java:6664)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
打开socket错误，权限没有声明，在AndroidManifest.xml文件中加入权限
当然 如果你是通过wifi连接socket的话记得开wifi的权限