[英]BluetoothSocket OutputStream.write() issue
I use modified Google Bluetooth Chat application to proceed client-server Bluetooth RFCOMM communication between two Android devices (with Android 5 and Android 6). 我使用改进的Google蓝牙聊天应用程序在两个Android设备(Android 5和Android 6)之间进行客户端 - 服务器蓝牙RFCOMM通信。
There is some code of my client application: 我的客户端应用程序有一些代码:
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final BufferedInputStream mmInStream;
private final BufferedOutputStream mmOutStream;
private ByteBuffer outputBuffer = null;
private int currentOperation = 0;
private byte currentMessageType = 0;
ConnectedThread(BluetoothSocket socket) {
Log.d(LOG_TAG, "create ConnectedThread: Insecure");
mmSocket = socket;
BufferedInputStream tmpIn = null;
BufferedOutputStream tmpOut = null;
try {
tmpIn = new BufferedInputStream(socket.getInputStream());
tmpOut = new BufferedOutputStream(socket.getOutputStream());
} catch (IOException e) {
Log.e(LOG_TAG, "temp sockets not created", e);
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
setState(STATE_CONNECTED);
}
public void run() {
Log.i(LOG_TAG, "BEGIN mConnectedThread");
byte[] buffer;
ByteBuffer intBuf;
int tempInt;
while (mState == STATE_CONNECTED) {
try {
if(mmInStream.available()>8) {
Log.i(LOG_TAG, mmInStream.available() + " f");
buffer = new byte[9];
mmInStream.read(buffer, 0, 9);
intBuf = ByteBuffer.wrap(buffer);
Log.i(LOG_TAG, "NEW MESSAGE: "+intBuf.getInt()+" "+intBuf.get()+" "+intBuf.getInt());
intBuf.rewind();
tempInt = intBuf.getInt();
Log.i(LOG_TAG, tempInt + " GET OP ID " + intBuf.capacity());
currentMessageType = intBuf.get();
Log.i(LOG_TAG, currentMessageType + " GET OP TYPE");
// ... some more code
}
}
catch (IOException err ) {
Log.e(LOG_TAG, "disconnected", err);
connectionLost();
break;
}
}
}
void write(byte[] data) {
try {
Log.i(LOG_TAG, "WRITE NEW MESSAGE: "+data.length);
mmOutStream.write(data);
SystemClock.sleep(200);
} catch (IOException e) {
Log.e(LOG_TAG, "Exception during write", e);
}
}
void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(LOG_TAG, "close() of connect socket failed", e);
}
}
This part manages the BluetoothSocket read/write operations. 该部分管理BluetoothSocket读/写操作。
So what's the problem? 所以有什么问题? When I send data with size <10000 bytes (byte array) it all goes normally. 当我发送大小<10000字节 (字节数组)的数据时,一切正常。 But then I try to send some big-sized data ( >10000 bytes ) and recieve this message (with LogCat): 但后来我尝试发送一些大型数据( > 10000字节 )并收到此消息(使用LogCat):
12-22 12:53:49.849 28177-28177/com.lukanin.testappjava2 I/(BLUETOOTH): DATA LENGTH: 35722 OPT ID: 1 TYPE: 11
12-22 12:53:49.849 28177-28177/com.lukanin.testappjava2 I/(BLUETOOTH): SEND DATA: 1 11 35722
12-22 12:53:49.849 28177-28177/com.lukanin.testappjava2 I/(BLUETOOTH): WRITE NEW MESSAGE: 35731
[ 12-22 12:53:49.849 21464:21536 D/ ]
PORT_WriteDataCO: tx queue is full,tx.queue_size:10890,tx.queue.count:11,available:14941
[ 12-22 12:53:49.959 21464:21536 D/ ]
PORT_WriteDataCO: tx queue is full,tx.queue_size:10890,tx.queue.count:11,available:3061
I think there is some kind of OutputStream overflow, but I can't understand how to fix it. 我认为有一些OutputStream溢出,但我无法理解如何修复它。 What should I do to prevent such situation? 我该怎么做才能防止这种情况发生? Is there any methods to check the OutputStream write availability? 有没有方法可以检查OutputStream写入的可用性?
PS This situation is relevant for Android 5 (on Android 6 all seems to be normal). PS这种情况与Android 5相关(在Android 6上似乎都很正常)。
In Android 5, 在Android 5中,
/* if we're over buffer high water mark, we're done */
if ((p_port->tx.queue_size > PORT_TX_HIGH_WM)
|| (p_port->tx.queue.count > PORT_TX_BUF_HIGH_WM))
{
port_flow_control_user(p_port);
event |= PORT_EV_FC;
debug("tx queue is full,tx.queue_size:%d,tx.queue.count:%d,available:%d",
p_port->tx.queue_size, p_port->tx.queue.count, available);
break;
}
I don't know the values for PORT_TX_HIGH_WM or PORT_TX_BUF_HIGH_WM but assume that this tx.queue_size is more than the maximum you can send. 我不知道PORT_TX_HIGH_WM或PORT_TX_BUF_HIGH_WM的值,但假设此tx.queue_size超过您可以发送的最大值。
See https://android.googlesource.com/platform/external/bluetooth/bluedroid/+/android-5.0.0_r3/stack/rfcomm/port_api.c 请参阅https://android.googlesource.com/platform/external/bluetooth/bluedroid/+/android-5.0.0_r3/stack/rfcomm/port_api.c
I am not sure whether this will help, but try to write in chunks: 我不确定这是否会有所帮助,但我会尝试写下块:
private static funal int CHUNK_SIZE = 200;
.....
int currentIndex = 0;
int size = data.length;
while (currentIndex < size) {
int currentLength = Math.Min(size-currentIndex, CHUNK_SIZE);
memOutStream.write(data, currentIndex, currentLength);
currentIndex += currentLength;
}
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