之前自己写了socket建立的连接,但是涉及到一些需要完善的地方,表示自己有点懒。然后就在网上找了一个socket框架, 拿来直接用。
阅读测试后,个人认为NettyClient 主要分为几个部分:
1,异步端口连接 Bootstrap
2,NettyClient的解码方式等 pipeline
3,配套的HandlerAdapter : ChannelInboundHandlerAdapter等。
4,计算断开后重新调用连接。
使用的时候下载个jar包就可以了
我先把定义的接口写了,下面的代码里面有用到。
public interface NettyListener {
public final static byte STATUS_CONNECT_SUCCESS = 1;//连接成功
public final static byte STATUS_CONNECT_CLOSED = 0;//关闭连接
public final static byte STATUS_CONNECT_ERROR = 0;//连接失败
/**
* 当接收到系统消息
*/
void onMessageResponse(Object msg);
/**
* 当连接状态发生变化时调用
*/
public void onServiceStatusConnectChanged(int statusCode);
}
NettyClient 类的书写
public class NettyClient {
private static final String TAG = "NettyClient";
private EventLoopGroup group;//Bootstrap参数
private NettyListener listener;//写的接口用来接收服务端返回的值
private Channel channel;//通过对象发送数据到服务端
private boolean isConnect = false;//判断是否连接了
private static int reconnectNum = Integer.MAX_VALUE;//定义的重连到时候用
private boolean isNeedReconnect = true;//是否需要重连
private boolean isConnecting = false;//是否正在连接
private long reconnectIntervalTime = 5000;//重连的时间
public String host;//ip
public int tcp_port;//端口
/*
构造 传入 ip和端口
*/
public NettyClient(String host, int tcp_port) {
this.host = host;
this.tcp_port = tcp_port;
}
/*
连接方法
*/
public void connect() {
if (isConnecting) {
return;
}
//起个线程
Thread clientThread = new Thread("client-Netty") {
@Override
public void run() {
super.run();
isNeedReconnect = true;
reconnectNum = Integer.MAX_VALUE;
connectServer();
}
};
clientThread.start();
}
//连接时的具体参数设置
private void connectServer() {
synchronized (NettyClient.this) {
ChannelFuture channelFuture = null;//连接管理对象
if (!isConnect) {
isConnecting = true;
group = new NioEventLoopGroup();//设置的连接group
Bootstrap bootstrap = new Bootstrap().group(group)//设置的一系列连接参数操作等
.option(ChannelOption.TCP_NODELAY, true)//屏蔽Nagle算法试图
.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 5000)
.channel(NioSocketChannel.class)
.handler(new ChannelInitializer<SocketChannel>() { // 5
@Override
public void initChannel(SocketChannel ch) throws Exception {
// ch.pipeline().addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));//服务端最后以"\n"作为结束标识
// ch.pipeline().addLast(new StringEncoder(CharsetUtil.UTF_8));//解码
// ch.pipeline().addLast(new StringDecoder(CharsetUtil.UTF_8));//解码
ch.pipeline().addLast(new NettyClientHandler(listener));//需要的handlerAdapter
}
});
try {
//连接监听
channelFuture = bootstrap.connect(host, tcp_port).addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture channelFuture) throws Exception {
if (channelFuture.isSuccess()) {
Log.e(TAG, "连接成功");
isConnect = true;
channel = channelFuture.channel();
} else {
Log.e(TAG, "连接失败");
isConnect = false;
}
isConnecting = false;
}
}).sync();
// 等待连接关闭
channelFuture.channel().closeFuture().sync();
Log.e(TAG, " 断开连接");
} catch (Exception e) {
e.printStackTrace();
} finally {
isConnect = false;
listener.onServiceStatusConnectChanged(NettyListener.STATUS_CONNECT_CLOSED);//STATUS_CONNECT_CLOSED 这我自己定义的 接口标识
if (null != channelFuture) {
if (channelFuture.channel() != null && channelFuture.channel().isOpen()) {
channelFuture.channel().close();
}
}
group.shutdownGracefully();
reconnect();//重新连接
}
}
}
}
//断开连接
public void disconnect() {
Log.e(TAG, "disconnect");
isNeedReconnect = false;
group.shutdownGracefully();
}
//重新连接
public void reconnect() {
Log.e(TAG, "reconnect");
if (isNeedReconnect && reconnectNum > 0 && !isConnect) {
reconnectNum--;
SystemClock.sleep(reconnectIntervalTime);
if (isNeedReconnect && reconnectNum > 0 && !isConnect) {
Log.e(TAG, "重新连接");
connectServer();
}
}
}
//发送消息到服务端。 Bootstrap设置的时候我没有设置解码,这边才转的
public boolean sendMsgToServer(String data, ChannelFutureListener listener) {
boolean flag = channel != null && isConnect;
if (flag) {
ByteBuf byteBuf = Unpooled.copiedBuffer(data + System.getProperty("line.separator"), //2
CharsetUtil.UTF_8);
channel.writeAndFlush(byteBuf).addListener(listener);
}
return flag;
}
//重连时间
public void setReconnectNum(int reconnectNum) {
this.reconnectNum = reconnectNum;
}
public void setReconnectIntervalTime(long reconnectIntervalTime) {
this.reconnectIntervalTime = reconnectIntervalTime;
}
//现在连接的状态
public boolean getConnectStatus() {
return isConnect;
}
public boolean isConnecting() {
return isConnecting;
}
public void setConnectStatus(boolean status) {
this.isConnect = status;
}
public void setListener(NettyListener listener) {
this.listener = listener;
}
}
netty socket 配套的handlerAdapter,直接上代码直接上
public class NettyClientHandler extends ChannelInboundHandlerAdapter {
private static final String TAG = "NettyClientHandler";
private NettyListener listener;
public NettyClientHandler(NettyListener listener) {
this.listener = listener;
}
//每次给服务器发送的东西, 让服务器知道我们在连接中哎
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
if (evt instanceof IdleStateEvent) {
IdleStateEvent event = (IdleStateEvent) evt;
if (event.state() == IdleState.WRITER_IDLE) {
ctx.channel().writeAndFlush("Heartbeat" + System.getProperty("line.separator"));
}
}
}
/**
* 连接成功
*/
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
Log.e(TAG, "channelActive");
super.channelActive(ctx);
listener.onServiceStatusConnectChanged(NettyListener.STATUS_CONNECT_SUCCESS);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
super.channelInactive(ctx);
Log.e(TAG, "channelInactive");
}
//接收消息的地方, 接口调用返回到activity了
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
System.out.println("客户端开始读取服务端过来的信息");
listener.onMessageResponse(msg);
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
// 当引发异常时关闭连接。
Log.e(TAG, "exceptionCaught");
listener.onServiceStatusConnectChanged(NettyListener.STATUS_CONNECT_ERROR);
cause.printStackTrace();
ctx.close();
}
}
定义的host和port类。虽然就几行,但我还是决定写上
public class Const { //百度找的markdown语法框框,表示有点丑
public static final String HOST = "192.168.0.46";
public static final int TCP_PORT = 5212;
public static final int LIVE_PORT = 5500;
}
使用
布局没什么东西, 就是个Button发送消息的,连接我写成进入app后默认连接了,失败和成功会有提示的昂, 失败了会一直重连。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/btn_send"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="发送消息" />
</LinearLayout>
其他核心的使用代码:!!!!
public class MainActivity extends BaseActivitiy implements NettyListener {
private Button btn_send;//发送
private NettyClient nettyClient;//socket操作连接对象
private final String TAG = "MainActivity.class";
@Override
protected int getContentView() {//这我自己的基类抽象的
return R.layout.activity_main;
}
@Override
protected void initView() {//这我自己的基类抽象的
initSocketTcp();//默认自动连接socket
btn_send = findViewById(R.id.btn_send);//发送
btn_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!nettyClient.getConnectStatus()) {//获取连接状态,必须连接才能点。
Toast.makeText(MainActivity.this, "先连接", Toast.LENGTH_SHORT).show();
} else {
JSONObject jsonObject = new JSONObject();//传个jsonobject给服务器
long l = System.currentTimeMillis();
try {
jsonObject.put("msgType", "infomation");
jsonObject.put("msgValue", "status");
jsonObject.put("msgTime", l + "");
} catch (JSONException e) {
e.printStackTrace();
}
/*
调用的发送。
*/
nettyClient.sendMsgToServer(jsonObject.toString(), new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture channelFuture) throws Exception {
if (channelFuture.isSuccess()) { //4
Log.d(TAG, "Write auth successful");
} else {
Log.d(TAG, "Write auth error");
}
}
});
}
}
});
}
/*
socket 端口号以及开始连接,配置接口监听
*/
private void initSocketTcp() {
nettyClient = new NettyClient(Const.HOST, Const.TCP_PORT);
if (!nettyClient.getConnectStatus()) {
nettyClient.setListener(MainActivity.this);
nettyClient.connect();
} else {
nettyClient.disconnect();
}
}
/*
回调客户端接收的信息 解析 数据流, 转换为string
*/
@Override
public void onMessageResponse(final Object msg) {
ByteBuf result = (ByteBuf) msg;
byte[] result1 = new byte[result.readableBytes()];
result.readBytes(result1);
result.release();
final String ss = new String(result1);
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "接收成功" + ss, Toast.LENGTH_SHORT).show();
}
});
}
//连接状态变化的时候 会走这
@Override
public void onServiceStatusConnectChanged(final int statusCode) {
runOnUiThread(new Runnable() {
@Override
public void run() {
if (statusCode == NettyListener.STATUS_CONNECT_SUCCESS) {
Log.e(TAG, "STATUS_CONNECT_SUCCESS:");
if (nettyClient.getConnectStatus()) {
Toast.makeText(MainActivity.this, "连接成功", Toast.LENGTH_SHORT).show();
}
} else {
Log.e(TAG, "onServiceStatusConnectChanged:" + statusCode);
if (!nettyClient.getConnectStatus()) {
Toast.makeText(MainActivity.this, "网路不好,正在重连", Toast.LENGTH_SHORT).show();
}
}
}
});
}
}
基本就这些了,我觉得我写非常清楚, 按照步骤的话直接就可以实现,
如果想知道到底能不能使用,能不能行。
可以使用工具..等等,肯定是能用的,好吗???!
哈哈,模拟服务端的话,可以下载个sokit ,windows还是mac都有,网上找就有。