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Android 牙齿投入/投入: 收到1008份
原标题：Android Bluetooth Input/Outputstream: Sent ~1400 bytes, received 1008

我试图在两部4.0.1电话之间发送数据,在我发送数据时,我没有在另一边接收全部数据。

我的法典:

byte[] buffer = new byte[4096];
int bytes;

bytes = inputStream.read(buffer);
// bytes = 1008
// buffer[1008..4095] = 0 
// =================== other side =============================
byte[] message = Tools.concatByteArray(response, authorizationMessage);

// Debug tells me that the array has 1400 bytes
outputStream.write(message);
outputStream.flush();

de中的信息是:

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and for buffer:
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因此,我首先得到1008人的同样数据,此后,我再也没有获得任何数据。

任何想法如何纠正?

问题回答

I had to solve a similar error. And the only related question was in this thread, which was still not solved. So had to search for reason and solution myself :).

The reason is that Android bluetooth seems to send the data in bunches of 1008 Bytes. So you need to read from the stream in a while loop and concatenate the received bytes.

在这里,应当如何改写你的法典:

byte[] buffer = new byte[4096];
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int bytes;

while ((bytes = inputStream.read(buffer, 0, buffer.length)) > -1) {
          baos.write(buffer, 0, bytes);
          baos.flush();
}
byte[] message = baos.toByteArray();

// =================== other side =============================
byte[] message = Tools.concatByteArray(response, authorizationMessage);
outputStream.write(message);
outputStream.flush();
outputStream.close(); // <-- important! so the receiver knows that it is the end of data
时间：2012-01-31 14:43:10

请查部分。 你可以看到;

You should use a dedicated thread for all stream reading and writing. This is important because both read(byte[]) and write(byte[]) methods are blocking calls. read(byte[]) will block until there is something to read from the stream. write(byte[]) does not usually block, but can block for flow control if the remote device is not calling read(byte[]) quickly enough and the intermediate buffers are full. So, your main loop in the thread should be dedicated to reading from the InputStream.

当我开始编码我的Reader Thread时,I tho read(byte [] 投递法将阻止执行,直到有理想的批量。 但它没有。 我发现,在从下游读到“有点”之前,它确实是阻挡的。

考虑你的包裹;0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09, 您通过Stream书写和抽打寄。 仅凭的一部分(7 1 byte -> 0x01)以一读(0x02和其余部分)的电话接下读(0x02和其余部分)。 在这种情况下,(a)项的回报价值将等于1,而新贝(0)则为0x01,其他要素为0。

时间：2013-01-30 08:22:31

Did you set any buffer size? Normally you would read until there is no more data.

时间：2012-01-12 11:01:09


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