Android的样品蓝牙code通过蓝牙发送一个简单的字符串

问题描述

我要发送一个简单的字符串数据，如A从Android设备到另一个通过蓝牙。我看了样品蓝牙code在Android SDK中，但它是对我来说太复杂。我不明白我怎么可以只发送特定的数据时，我preSS的按钮。我该如何解决这个问题呢？

解决方案

 私人的OutputStream的OutputStream;
私人的InputStream inStream中;

私人无效的init（）抛出IOException异常{
    BluetoothAdapter blueAdapter = BluetoothAdapter.getDefaultAdapter（）;
    如果（blueAdapter！= NULL）{
        如果（blueAdapter.isEnabled（））{
            设置＆LT; BluetoothDevice类＆GT; bondedDevices = blueAdapter.getBondedDevices（）;

            如果（bondedDevices.size（）大于0）{
                BluetoothDevice类[]设备=（BluetoothDevice类[]）bondedDevices.toArray（）;
                BluetoothDevice类设备的设备= [0];
                ParcelUuid []的UUID = device.getUuids（）;
                的BluetoothSocket插座= device.createRfcommSocketToServiceRecord（UUID的[0] .getUuid（））;
                Socket.connect（）的;
                的OutputStream = socket.getOutputStream（）;
                inStream中= socket.getInputStream（）;
            }

            Log.e（错误，没有合适的配对设备。）;
        }其他{
            Log.e（错误，蓝牙被禁用。）;
        }
    }
}

公共无效写入（String s）将抛出IOException异常{
    outputStream.write（s.getBytes（））;
}

公共无效的run（）{
    最终诠释BUFFER_SIZE = 1024;
    byte []的缓冲区=新的字节[BUFFER_SIZE];
    INT字节= 0;
    INT B = BUFFER_SIZE;

    而（真）{
        尝试 {
            字节= inStream.read（缓冲区，字节，BUFFER_SIZE  - 字节）;
        }赶上（IOException异常E）{
            e.printStackTrace（）;
        }
    }
}
 

I want to send a simple string data such as 'a' from an android device to other one via bluetooth. I looked sample bluetooth code in android sdk but it is so complex for me. I cannot understand how I can send only specific data when I press a button. How can I solve this problem?

解决方案

private OutputStream outputStream;
private InputStream inStream;

private void init() throws IOException {
    BluetoothAdapter blueAdapter = BluetoothAdapter.getDefaultAdapter();
    if (blueAdapter != null) {
        if (blueAdapter.isEnabled()) {
            Set<BluetoothDevice> bondedDevices = blueAdapter.getBondedDevices();

            if(bondedDevices.size() > 0){
                BluetoothDevice[] devices = (BluetoothDevice[]) bondedDevices.toArray();
                BluetoothDevice device = devices[0];
                ParcelUuid[] uuids = device.getUuids();
                BluetoothSocket socket = device.createRfcommSocketToServiceRecord(uuids[0].getUuid());
                socket.connect();
                outputStream = socket.getOutputStream();
                inStream = socket.getInputStream();
            }

            Log.e("error", "No appropriate paired devices.");
        }else{
            Log.e("error", "Bluetooth is disabled.");
        }
    }
}

public void write(String s) throws IOException {
    outputStream.write(s.getBytes());
}

public void run() {
    final int BUFFER_SIZE = 1024;
    byte[] buffer = new byte[BUFFER_SIZE];
    int bytes = 0;
    int b = BUFFER_SIZE;

    while (true) {
        try {
            bytes = inStream.read(buffer, bytes, BUFFER_SIZE - bytes);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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