Blackberry Api：将字节数组写入文件

发布于 2024-11-25 00:29:37 字数 540 浏览 4 评论 0原文

我正在尝试从 mp3 文件读取和写入元数据。我可以读取数据，但不知道如何写入。

我使用以下代码来获取文件访问权限：

FileConnection file = (FileConnection) Connector.open("file:///store/home/user/music/song.mp3");
if(file.exists())
         java.io.InputStream inputStream = file.openInputStream();

稍后，我使用以下代码读取数据：

buffer = new byte[length]; // length is predetermined earlier
if (inputStream.read(buffer, 0, length) == length)
         String info = new String((buffer));

如何将数据（字节）写入文件中的指定位置？我不确定输出字节所需的 IO 声明和特定代码。

原文

I am trying to read and write metadata to/from an mp3 file. I can read the data, but I cannot figure out how to write it.

I use the following code to get file access:

FileConnection file = (FileConnection) Connector.open("file:///store/home/user/music/song.mp3");
if(file.exists())
         java.io.InputStream inputStream = file.openInputStream();

Later, I read the data using the following code:

buffer = new byte[length]; // length is predetermined earlier
if (inputStream.read(buffer, 0, length) == length)
         String info = new String((buffer));

How do I write data (bytes) to the a designated location in the file? I am unsure of both the IO declarations and the specific code required to output my bytes.

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断舍离 2024-12-02 00:29:37

要在 Blackberry 上写入文件，请使用以下代码：

    FileConnection fconn = null;
    OutputStream out = null;
    try {
        fconn = (FileConnection) Connector.open(yourFileNameAndPath,Connector.READ_WRITE);
    }
    fconn.create();
    out = fconn.openOutputStream();
    out.write(yourDataBytes);
    out.flush();
    fconn.close();

To write a file on Blackberry use the following code:

    FileConnection fconn = null;
    OutputStream out = null;
    try {
        fconn = (FileConnection) Connector.open(yourFileNameAndPath,Connector.READ_WRITE);
    }
    fconn.create();
    out = fconn.openOutputStream();
    out.write(yourDataBytes);
    out.flush();
    fconn.close();

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