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Android平台的TCPIP通信和蓝牙通信实例

Android平台开发

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  • 开发语言:Java
  • 实例大小:22.67M
  • 下载次数:39
  • 浏览次数:237
  • 发布时间:2020-04-08
  • 实例类别:Android平台开发
  • 发 布 人:swc010
  • 文件格式:.zip
  • 所需积分:5
 相关标签: Android TCPIP通信 tcp and 通信

实例介绍

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【核心代码】

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package com.managesoft.nullchen.buletoothdemo;
 
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.UUID;
 
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
 
import static android.widget.Toast.LENGTH_SHORT;
 
public class BuletoothClientActivity extends Activity implements OnItemClickListener{
    // 获取到蓝牙适配器
    private BluetoothAdapter mBluetoothAdapter;
    // 用来保存搜索到的设备信息
    private List<String> bluetoothDevices = new ArrayList<String>();
    // ListView组件
    private ListView lvDevices;
    // ListView的字符串数组适配器
    private ArrayAdapter<String> arrayAdapter;
    // UUID,蓝牙建立链接需要的
    private final UUID MY_UUID = UUID
            .fromString("00001101-0000-1000-8000-00805F9B34FB");
    // 为其链接创建一个名称
    private final String NAME = "Bluetooth_Socket";
    // 选中发送数据的蓝牙设备,全局变量,否则连接在方法执行完就结束了
    private BluetoothDevice selectDevice;
    // 获取到选中设备的客户端串口,全局变量,否则连接在方法执行完就结束了
    private BluetoothSocket clientSocket;
    // 获取到向设备写的输出流,全局变量,否则连接在方法执行完就结束了
    private OutputStream os;
    // 服务端利用线程不断接受客户端信息
    private AcceptThread thread;
    //定义按钮
    //定义按钮
    private Button close_all_led;
    private Button red1 = null;
    private Button green1 = null;
    private Button blue1 = null;
    private Button breath = null;
    private TextView receive1;
    private SeekBar seekBar;
    private String LED_STATE = "A 红灯亮";
    private TextView re_msg;
    private TextView temperature;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_buletooth_seacher);
        red1 = (Button)findViewById(R.id.red);
        green1 = (Button)findViewById(R.id.green);
        blue1 = (Button)findViewById(R.id.blue);
        receive1 = (TextView)findViewById(R.id.receive_text);
        close_all_led = (Button)findViewById(R.id.close_all_led);
        breath = (Button)findViewById(R.id.breath);
        seekBar = (SeekBar)findViewById(R.id.seekBar);
        re_msg = (TextView)findViewById(R.id.msg);
        temperature = (TextView)findViewById(R.id.temperature);
 
        red1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LED_STATE = "R";
                receive1.setText(LED_STATE);
            }
        });
        green1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LED_STATE = "G";
                receive1.setText(LED_STATE);
            }
        });
        blue1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LED_STATE = "B";
                receive1.setText(LED_STATE);
            }
        });
        close_all_led.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LED_STATE = "E";
                receive1.setText(LED_STATE);
            }
        });
        breath.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LED_STATE = "H";
                receive1.setText(LED_STATE);
            }
        });
        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                if (b){
                    LED_STATE ="{0:" i "}";
                    receive1.setText(LED_STATE);
                }
            }
 
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
 
            }
 
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
 
            }
        });
        // 获取到蓝牙默认的适配器
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        // 获取到ListView组件
        lvDevices = (ListView) findViewById(R.id.lvDevices);
        // 为listview设置字符换数组适配器
        arrayAdapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, android.R.id.text1,
                bluetoothDevices);
        // 为listView绑定适配器
        lvDevices.setAdapter(arrayAdapter);
        // 为listView设置item点击事件侦听
        lvDevices.setOnItemClickListener(this);
 
        // 用Set集合保持已绑定的设备   将绑定的设备添加到Set集合。
        Set<BluetoothDevice> devices = mBluetoothAdapter.getBondedDevices();
        if (devices.size() > 0) {
            for (BluetoothDevice bluetoothDevice : devices) {
                // 保存到arrayList集合中
                bluetoothDevices.add(bluetoothDevice.getName()   ":"
                          bluetoothDevice.getAddress()   "\n");
            }
        }
 
        // 因为蓝牙搜索到设备和完成搜索都是通过广播来告诉其他应用的
        // 这里注册找到设备和完成搜索广播
        IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
        registerReceiver(receiver, filter);
        filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
        registerReceiver(receiver, filter);
 
        // 实例接收客户端传过来的数据线程
        thread = new AcceptThread();
        // 线程开始
        thread.start();
    }
 
    //搜索蓝牙设备
    public void onClick_Search(View view) {
        setTitle("正在扫描...");
        // 点击搜索周边设备,如果正在搜索,则暂停搜索
        if (mBluetoothAdapter.isDiscovering()) {
            mBluetoothAdapter.cancelDiscovery();
        }
        mBluetoothAdapter.startDiscovery();
    }
    // 注册广播接收者
    private BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context arg0, Intent intent) {
            // 获取到广播的action
            String action = intent.getAction();
            // 判断广播是搜索到设备还是搜索完成
            if (action.equals(BluetoothDevice.ACTION_FOUND)) {
                // 找到设备后获取其设备
                BluetoothDevice device = intent
                        .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                // 判断这个设备是否是之前已经绑定过了,如果是则不需要添加,在程序初始化的时候已经添加了
                if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
                    // 设备没有绑定过,则将其保持到arrayList集合中
                    bluetoothDevices.add(device.getName()   ":"
                              device.getAddress()   "\n");
                    // 更新字符串数组适配器,将内容显示在listView中
                    arrayAdapter.notifyDataSetChanged();
                }
            } else if (action
                    .equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)) {
                setTitle("搜索完成");
            }
        }
    };
 
    // 点击listView中的设备,传送数据
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
                            long id) {
        // 获取到这个设备的信息
        String s = arrayAdapter.getItem(position);
        // 对其进行分割,获取到这个设备的地址
        String address = s.substring(s.indexOf(":")   1).trim();
        Log.d("TAG",address);
        // 判断当前是否还是正在搜索周边设备,如果是则暂停搜索
        if (mBluetoothAdapter.isDiscovering()) {
            mBluetoothAdapter.cancelDiscovery();
        }
        // 如果选择设备为空则代表还没有选择设备
        if (selectDevice == null) {
            //通过地址获取到该设备
            selectDevice = mBluetoothAdapter.getRemoteDevice(address);
        }
        // 这里需要try catch一下,以防异常抛出
        try {
            // 判断客户端接口是否为空
            if (clientSocket == null) {
                // 获取到客户端接口
                clientSocket = selectDevice
                        .createRfcommSocketToServiceRecord(MY_UUID);
                // 向服务端发送连接
                clientSocket.connect();
                // 获取到输出流,向外写数据
                os = clientSocket.getOutputStream();
 
            }
            // 判断是否拿到输出流
            if (os != null) {
                // 需要发送的信息
                //String text = "我传过去了";
                // 以utf-8的格式发送出去
                os.write(LED_STATE.getBytes("UTF-8"));
            }
            // 吐司一下,告诉用户发送成功
            Toast.makeText(this, "发送信息成功,请查收", LENGTH_SHORT).show();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            // 如果发生异常则告诉用户发送失败
            Toast.makeText(this, "发送信息失败", LENGTH_SHORT).show();
        }
 
    }
    public void send(String string){
        try {
            // 判断客户端接口是否为空
            if (clientSocket == null) {
                // 获取到客户端接口
                clientSocket = selectDevice
                        .createRfcommSocketToServiceRecord(MY_UUID);
                // 向服务端发送连接
                clientSocket.connect();
                // 获取到输出流,向外写数据
                os = clientSocket.getOutputStream();
 
            }
            // 判断是否拿到输出流
            if (os != null) {
                // 需要发送的信息
                //String text = "我传过去了";
                // 以utf-8的格式发送出去
                os.write(string.getBytes("UTF-8"));
            }
            // 吐司一下,告诉用户发送成功
            Toast.makeText(this, "发送信息成功,请查收", LENGTH_SHORT).show();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            // 如果发生异常则告诉用户发送失败
            Toast.makeText(this, "发送信息失败", LENGTH_SHORT).show();
        }
    }
    // 创建handler,因为我们接收是采用线程来接收的,在线程中无法操作UI,所以需要handler
    Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            // TODO Auto-generated method stub
            super.handleMessage(msg);
            // 通过msg传递过来的信息,吐司一下收到的信息
           // Toast.makeText(BuletoothClientActivity.this, (String) msg.obj, Toast.LENGTH_SHORT).show();
            re_msg.setText((String)msg.obj);
 
            //当检测到是要求接收温度时,发送数据
            if(((String)msg.obj).equals("R")){
                send("当前温度:25.2  ℃");
            }
        }
    };
 
    // 服务端接收信息线程
    private class AcceptThread extends Thread {
        private BluetoothServerSocket serverSocket;// 服务端接口
        private BluetoothSocket socket;// 获取到客户端的接口
        private InputStream is;// 获取到输入流
        private OutputStream os;// 获取到输出流
 
        public AcceptThread() {
            try {
                // 通过UUID监听请求,然后获取到对应的服务端接口
                serverSocket = mBluetoothAdapter
                        .listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
 
        public void run() {
            try {
                // 接收其客户端的接口
                socket = serverSocket.accept();
                // 获取到输入流
                is = socket.getInputStream();
                // 获取到输出流
                os = socket.getOutputStream();
 
                // 无线循环来接收数据
                while (true) {
                    // 创建一个128字节的缓冲
                    byte[] buffer = new byte[128];
                    // 每次读取128字节,并保存其读取的角标
                    int count = is.read(buffer);
                    // 创建Message类,向handler发送数据
                    Message msg = new Message();
                    // 发送一个String的数据,让他向上转型为obj类型
                    msg.obj = new String(buffer, 0, count, "utf-8");
                    // 发送数据
                    handler.sendMessage(msg);
                }
            } catch (Exception e) {
                // TODO: handle exception
                e.printStackTrace();
            }
 
        }
    }
}

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Android平台的TCPIP通信和蓝牙通信实例

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