Android蓝牙开发深入解析

<uses-permission android:name="android.permission.bluetooth" />
<uses-permission android:name="android.permission.bluetooth_admin" />

bluetoothadapter adapter = bluetoothadapter.getdefaultadapter();
//直接打开系统的蓝牙设置面板
intent intent = new intent(bluetoothadapter.action_request_enable);
startactivityforresult(intent, 0x1);
//直接打开蓝牙
adapter.enable();
//关闭蓝牙
adapter.disable();
//打开本机的蓝牙发现功能（默认打开120秒，可以将时间最多延长至300秒）
intent discoveryintent = new intent(bluetoothadapter.action_request_discoverable);
discoverableintent.putextra(bluetoothadapter.extra_discoverable_duration, 300);//设置持续时间（最多300秒）

// 创建一个接收action_found广播的broadcastreceiver
private final broadcastreceiver mreceiver = new broadcastreceiver() {
    public void onreceive(context context, intent intent) {
        string action = intent.getaction();
        // 发现设备
        if (bluetoothdevice.action_found.equals(action)) {
            // 从intent中获取设备对象
            bluetoothdevice device = intent.getparcelableextra(bluetoothdevice.extra_device);
            // 将设备名称和地址放入array adapter，以便在listview中显示
            marrayadapter.add(device.getname() + "\n" + device.getaddress());
        }
    }
};
// 注册broadcastreceiver
intentfilter filter = new intentfilter(bluetoothdevice.action_found);
registerreceiver(mreceiver, filter); // 不要忘了之后解除绑定

private class acceptthread extends thread {
    private final bluetoothserversocket mmserversocket;

    public acceptthread() {
        // use a temporary object that is later assigned to mmserversocket,
        // because mmserversocket is final
        bluetoothserversocket tmp = null;
        try {
            // my_uuid is the app's uuid string, also used by the client code
            tmp = mbluetoothadapter.listenusingrfcommwithservicerecord(name, my_uuid);
        } catch (ioexception e) { }
        mmserversocket = tmp;
    }

    public void run() {
        bluetoothsocket socket = null;
        // keep listening until exception occurs or a socket is returned
        while (true) {
            try {
                socket = mmserversocket.accept();
            } catch (ioexception e) {
                break;
            }
            // if a connection was accepted
            if (socket != null) {
                // do work to manage the connection (in a separate thread)
                manageconnectedsocket(socket);
                mmserversocket.close();
                break;
            }
        }
    }

    /** will cancel the listening socket, and cause the thread to finish */
    public void cancel() {
        try {
            mmserversocket.close();
        } catch (ioexception e) { }
    }
}

private class connectthread extends thread {
    private final bluetoothsocket mmsocket;
    private final bluetoothdevice mmdevice;

    public connectthread(bluetoothdevice device) {
        // use a temporary object that is later assigned to mmsocket,
        // because mmsocket is final
        bluetoothsocket tmp = null;
        mmdevice = device;

        // get a bluetoothsocket to connect with the given bluetoothdevice
        try {
            // my_uuid is the app's uuid string, also used by the server code
            tmp = device.createrfcommsockettoservicerecord(my_uuid);
        } catch (ioexception e) { }
        mmsocket = tmp;
    }

    public void run() {
        // cancel discovery because it will slow down the connection
        mbluetoothadapter.canceldiscovery();

        try {
            // connect the device through the socket. this will block
            // until it succeeds or throws an exception
            mmsocket.connect();
        } catch (ioexception connectexception) {
            // unable to connect; close the socket and get out
            try {
                mmsocket.close();
            } catch (ioexception closeexception) { }
            return;
        }

        // do work to manage the connection (in a separate thread)
        manageconnectedsocket(mmsocket);
    }

    /** will cancel an in-progress connection, and close the socket */
    public void cancel() {
        try {
            mmsocket.close();
        } catch (ioexception e) { }
    }
}

private class connectedthread extends thread {
    private final bluetoothsocket mmsocket;
    private final inputstream mminstream;
    private final outputstream mmoutstream;

    public connectedthread(bluetoothsocket socket) {
        mmsocket = socket;
        inputstream tmpin = null;
        outputstream tmpout = null;

        // get the input and output streams, using temp objects because
        // member streams are final
        try {
            tmpin = socket.getinputstream();
            tmpout = socket.getoutputstream();
        } catch (ioexception e) { }

        mminstream = tmpin;
        mmoutstream = tmpout;
    }

    public void run() {
        byte[] buffer = new byte[1024];  // buffer store for the stream
        int bytes; // bytes returned from read()

        // keep listening to the inputstream until an exception occurs
        while (true) {
            try {
                // read from the inputstream
                bytes = mminstream.read(buffer);
                // send the obtained bytes to the ui activity
                mhandler.obtainmessage(message_read, bytes, -1, buffer)
                        .sendtotarget();
            } catch (ioexception e) {
                break;
            }
        }
    }

    /* call this from the main activity to send data to the remote device */
    public void write(byte[] bytes) {
        try {
            mmoutstream.write(bytes);
        } catch (ioexception e) { }
    }

    /* call this from the main activity to shutdown the connection */
    public void cancel() {
        try {
            mmsocket.close();
        } catch (ioexception e) { }
    }
}