android - 从android发送文件到其他蓝牙设备

Question

我正在尝试使用以下代码将文件从 android 发送到另一台设备

        socket = device.createRfcommSocketToServiceRecord(uuid);
        socket.connect();
        OutputStream os = socket.getOutputStream();
        File f = new File(strPath);
        byte [] buffer = new byte[(int)f.length()];
        FileInputStream fis = new FileInputStream(f);
        BufferedInputStream bis = new BufferedInputStream(fis);
        bis.read(buffer,0,buffer.length);
        os.write(buffer,0,buffer.length);
        os.flush();
        os.close();
        socket.close();

我在 AndroidManifest.xml 中添加了 BLUETOOTH 和 BLUETOOTH_ADMIN 到用户权限

但是文件没有传输，连接正在建立黑白设备

Answer 1

我不知道为什么你的方法不起作用，如果有人知道答案请发帖我想知道。但下面是我如何让我的工作，我基本上是以 1024 字节的 block 发送文件。

/*Transmit*/
private OutputStream mOut;
byte[] mBuffer = byte[1024]
mBtSocket = _socket;
mOut = mBtSocket.getOutputStream();
InputStream inFile = new FileInputStream(file);
while((mLen = inFile.read(mBuffer, 0, 1024)) > 0){
         mOut.write(mBuffer, 0, mLen);
}

/*Receive*/
private InputStream mIn;
byte[] mBuffer = byte[1024]
File file = new File(fileName);
OutputStream outFile = new FileOutputStream(file);
long bytesReceived = 0;
while (bytesReceived < fileSize) {  // I send fileSize as msg prior to this file transmit
    mLen = mIn.read(mBuffer);
if(mLen > 0) {
    bytesReceived+=mLen;
    outFile.write(mBuffer, 0, mLen);
} else {
    Log.d(TAG,"Read received -1, breaking");
    break;
}
}
outFile.close();