LocalServerSocket 输出数据到本地

[baidu_26974557]

public class ServerThread implements Runnable {
    private LocalServerSocket server = null;
    private BufferedReader reader = null;
    private LocalSocket connect;
    private String readString;
    private OutputStreamWriter writer;
    private String environmentPath;
    private File dir;

    public ServerThread() {
        environmentPath = getSDPath();
        if (environmentPath == null) {
            return;
        }
        dir = new File(environmentPath + "/recordtest");
        if (!dir.exists()) {     //返回一个布尔值，指示是否可以在下面的文件系统中找到这个文件。
            dir.mkdir();
        }
    }

    public String getDate() {
        Calendar ca = Calendar.getInstance();
        int year = ca.get(Calendar.YEAR);           // 获取年份
        int month = ca.get(Calendar.MONTH);         // 获取月份
        int day = ca.get(Calendar.DATE);            // 获取日
        int minute = ca.get(Calendar.MINUTE);       // 分
        int hour = ca.get(Calendar.HOUR);           // 小时
        int second = ca.get(Calendar.SECOND);       // 秒

        String date = "" + year + (month + 1) + day + hour + minute + second;
        return date;
    }

    public String getSDPath() {
        File sdDir = null;
        boolean sdCardExist = Environment.getExternalStorageState()
                .equals(android.os.Environment.MEDIA_MOUNTED); // 判断sd卡是否存在
        if (sdCardExist) {
            sdDir = Environment.getExternalStorageDirectory();// 获取跟目录
            return sdDir.toString();
        }
        return null;
    }

    @Override
    public void run() {
        try {
            server = new LocalServerSocket(GlobalVariable.SOCKET_ADDRESS);
            while (true) {
                connect = server.accept();
                Credentials peerCredentials = connect.getPeerCredentials();
                Log.w("TAG", "accept socket uid:" + peerCredentials.getUid());
                reader = new BufferedReader(new InputStreamReader
                        (connect.getInputStream()));
                writer = new OutputStreamWriter(
                        new FileOutputStream(dir+"/"+getDate()+".mp4"));

                while ((readString = reader.readLine()) != null) {
                    if (readString.equals("finish")) break;
                    writer.write(readString);
                }
                writer.flush();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (reader != null) {
                    reader.close();
                }
                if (writer != null)
                    writer.close();
                if (connect != null)
                    connect.close();
                if (server != null)
                    server.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

文件能够输出，但是输出的MP4不能播放 求大神 看一下哪里可以改正

[baidu_26974557]

客户端那边的启动这个线程 并且设置了mediaRecorder.setOutputFile(localsoket.getFileDescriptor());