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Android端通过usb和pc端互传json数据_jsonrpc通过usb连接手机

作者：黑客灵魂 | 2024-07-10 06:02:28

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jsonrpc通过usb连接手机

一、关于android端和usb的通信问题

原本对usb通信相关并不是很了解，但是涉及到了usb传输数据和pc交互，于是就开始了解起来，开始查阅了很多资料，同时也问了相关的朋友，感觉都很少有涉及到的，这里来做一个简单的总结，android和pc短通过usb通信这里主要是依赖于socket通信，大概的思路如下：

  • 第一步，Android端注册一个开启和关闭Android端服务的广播，用于监听pc端要求开启或关闭服务；
  • 第二步，Android端开启子线程用于监听pc端传输过来的数据，并且根据数据判断做出相应的操作；
  • 第三步，在pc端设置adb 指令开启Android端的服务，并且建立连接 后可以传输数据；

二、代码具体实现

第一步，注册一个开启和关闭Android端服务的广播，然后开启或关闭服务；

/**
 * Created by shq on 2017/5/17.
 * 监听pc端发送的adb命令开启android端服务
 */
public class ServiceBroadcastReceiver extends BroadcastReceiver {

    private static String START_ACTION = "NotifyServiceStart";
    private static String STOP_ACTION = "NotifyServiceStop";

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (START_ACTION.equalsIgnoreCase(action)){
            context.startService(new Intent(context,androidService.class));
            Log.e(androidService.TAG,Thread.currentThread().getName()+"------>"
                    + "onReceive start");
        }else if (STOP_ACTION.equalsIgnoreCase(action)){
            context.stopService(new Intent(context,androidService.class));
            Log.e(androidService.TAG,Thread.currentThread().getName()+"------>"
                    + "onReceive stop");
        }
    }
}
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第二步、开启一个服务来监听数据的通信

/**
 * Created by shq on 2017/5/17.
 * 这里是监听pc端传输数据的端口
 */
public class androidService extends Service {

    public static final String TAG = "shq";
    public static Boolean mainThreadFlag = true;
    public static Boolean ioThreadFlag = true;
    ServerSocket serverSocket = null;
    final int SERVER_PORT = 10086;

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.e(TAG,"androidService--onCreate()");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.e(TAG,"androidService--onStartCommand()");
        mainThreadFlag = true;
        new Thread(){
            @Override
            public void run() {
               doListen();
            }
        }.start();
        return START_NOT_STICKY;
    }

    /**
     * 开启子线程监听端口
     */
    private void doListen() {
        serverSocket = null;
        try {
            serverSocket = new ServerSocket(SERVER_PORT);
            Log.e(TAG,"doListen()");
            while (mainThreadFlag){
                Socket socket = serverSocket.accept();
                Log.e(TAG,"doListen()mainThread");
                new Thread(new ThreadReadWriterIOSocket(this, socket)).start();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        //关闭线程
        mainThreadFlag = false;
        ioThreadFlag = false;
        Log.e(TAG, Thread.currentThread().getName() + "--"
                + "serverSocket.close()");
        //关闭服务
        if (serverSocket != null){
            try {
                serverSocket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        Log.e(TAG, Thread.currentThread().getName() + "--onDestroy()");
    }
}
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第三步，新建一个子线程监听pc端传输过来的数据

/**
 * Created by shq on 2017/5/17.
 */
public class ThreadReadWriterIOSocket implements Runnable{

    private Socket client;
    private Context context;

    public ThreadReadWriterIOSocket(Context context, Socket client) {
        this.client = client;
        this.context = context;
    }

    @Override
    public void run() {
        Log.e(androidService.TAG, "a client has connected to server!");
        BufferedOutputStream out;
        BufferedInputStream in;
        /*pc端发来的数据msg*/
        String currCMD = "";
        try {
            out = new BufferedOutputStream(client.getOutputStream());
            in = new BufferedInputStream(client.getInputStream());
            androidService.ioThreadFlag = true;
            while (androidService.ioThreadFlag){
                if (!client.isConnected()){
                    break;
                }
                /*接收pc端发来的数据*/
                Log.e(androidService.TAG, Thread.currentThread().getName()
                        + "--is readingData......");
                /*读取的操作*/
                currCMD = readCMDFromSocket(in);
                Log.e(androidService.TAG, Thread.currentThread().getName()
                        + "---->" + "**currCMD ==== " + currCMD);
                /*根据cmd命令处理数据*/
                if (currCMD.equals("1")||currCMD.equals("2")
                    ||currCMD.equals("3")||) {
                    out.write("OK".getBytes());
                    out.flush();
                }else if (currCMD.equals("4")){
                    /**
                     * 这里将json对象传输到pc端
                     */
                    Map<String, String> map = new HashMap<String, String>();
                    map.put("name","android");
                    map.put("img","to");
                    map.put("op","pc");
                    //将json转化为String类型
                    JSONObject json = new JSONObject(map);
                    String jsonString = "";
                    jsonString = json.toString();
                    //将String转化为byte[]
                    byte[] jsonByte = jsonString.getBytes();
                    out.write(jsonByte);
                    out.flush();
                }else if (currCMD.equalsIgnoreCase("exit")){
                    out.write("exit ok".getBytes());
                    out.flush();
                }
            }
            out.close();
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                if (client != null) {
                    Log.e(androidService.TAG, Thread.currentThread().getName()
                            + "--client.close()");
                    client.close();
                }
            } catch (IOException e) {
                Log.e(androidService.TAG, Thread.currentThread().getName()
                        + "--read write error");
                e.printStackTrace();
            }
        }
    }
    /**
     * 读取命令
     * @param in
     * @return
     */
    private String readCMDFromSocket(BufferedInputStream in) {
        int MAX_BUFFER_BYTES = 2048;
        String msg = "";
        byte[] tempbuffer = new byte[MAX_BUFFER_BYTES];
        try {
            int numReadedBytes = in.read(tempbuffer, 0, tempbuffer.length);
            msg = new String(tempbuffer,0,numReadedBytes,"UTF-8");
            tempbuffer = null;
            Log.e(androidService.TAG, Thread.currentThread().getName()
                    + "--readFromSocket error");
        } catch (IOException e) {
            Log.e(androidService.TAG, Thread.currentThread().getName()
                    + "--readFromSocket error");
            e.printStackTrace();
        }
        return msg;
    }
}

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第四步、pc端的数据传输及adb命令

/**
 * 测试usb与pc通信 通过adb端口转发方式
 */
public class testPcClient {

public static void main(String[] args) throws InterruptedIOException {

    try {
        // adb 指令
        Runtime.getRuntime().exec("adb forward tcp:12580 tcp:10086"); // 端口转换
        Thread.sleep(3000);
        Runtime.getRuntime().exec("adb shell am broadcast -a NotifyServiceStart");  
    } catch (Exception e) {
        e.printStackTrace();
    }
    Socket socket = null;
    try {
        InetAddress serveraddr = null;
        serveraddr = InetAddress.getByName("127.0.0.1");
        System.out.println("TCP1" + "C: Connecting...");
        socket = new Socket(serveraddr, 12580);
        System.out.println("TCP2" + "C: Receive");
        BufferedOutputStream out = new BufferedOutputStream(socket.getOutputStream());
        BufferedInputStream in = new BufferedInputStream(socket.getInputStream());
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        boolean flag = true;
        while (flag) {
            System.out.print("输入数0进行文件传输,退出输入-1\n");
            String strWord = br.readLine();// 从控制台输入
            if(strWord.equals("0")){
                /* 准备接收文件数据 */
                    out.write("4".getBytes());
                    out.flush(); 
                Thread.sleep(300);//等待服务端回复
                String strFormsocket = readFromSocket(in);  
                System.out.println("安卓传来的数据" + strFormsocket); 
            }else if(strWord.equalsIgnoreCase("EXIT")){
                out.write("EXIT".getBytes());  
                out.flush();  
                System.out.println("EXIT!");  
                String strFormsocket = readFromSocket(in);  
                System.out.println("the data sent by server is:/r/n" +strFormsocket);  
                flag = false;   
            }
        }

    } catch (UnknownHostException e1) {
        System.out.println("TCP3" + "ERROR:" + e1.toString());
    } catch (Exception e2) {
        System.out.println("TCP4" + "ERROR:" + e2.toString());
    }finally{
        try {  
            if (socket != null) {  
                socket.close();  
                System.out.println("socket.close()");  
            }  
        } catch (IOException e) {  
            System.out.println("TCP5" + "ERROR:" + e.toString());  
        }  
    }
}
/* 从InputStream流中读数据 */
public static String readFromSocket(InputStream in) {
    int MAX_BUFFER_BYTES = 4000;
    String msg = "";
    byte[] tempbuffer = new byte[MAX_BUFFER_BYTES];
    try {
        int numReadedBytes = in.read(tempbuffer, 0, tempbuffer.length);
        msg = new String(tempbuffer, 0, numReadedBytes, "utf-8");
        tempbuffer = null;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return msg;
}

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