I have a wifi sd card which sends me TCP packages with information about new images on the memory after I shoot a photo with the camera.
On the terminal I can read the inputstream with this netcat command. netcat connects to ip 192.168.11.254 and listen on port 5566. the second line is the image path which I receive.
$ nc 192.168.11.254 5566
>/mnt/sd/DCIM/109_0302/IMGP0101.JPG
On my app I have a Java client socket which is connected to the same ip and port. But I don't receive the inputstream like in netcat, nothing happens.
void startListenForTCP (){
Thread TCPListenerThread = new Thread(new Runnable() {
@Override
public void run() {
Boolean run = true;
String serverMessage = null;
InetAddress serverAddr = null;
try {
serverAddr = InetAddress.getByName("192.168.11.254");
Socket clientSocket = new Socket(serverAddr, 5566);
try{
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
while (run) {
serverMessage = in.readLine();
mHandler.post(new DisplayToast(context, "TCP : " + serverMessage));
}
} catch(UnknownHostException e) {
mHandler.post(new DisplayToast(context, "UnknownHostException"));
} catch(IOException e) {
mHandler.post(new DisplayToast(context, "IOException"));
} finally {
clientSocket.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
});
TCPListenerThread.start();
}
try this may it works
Remove these two lines:
serverAddr = InetAddress.getByName("192.168.11.254");
Socket clientSocket = new Socket(serverAddr, 5566);
Add this line:
Socket clientSocket = new Socket("192.168.11.254", 5566);
Remove this code:
try {
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
while (run) {
serverMessage = in.readLine();
mHandler.post(new DisplayToast(context, "TCP : " + serverMessage));
}
}
Add this code:
try {
char[] buffer = new char[2048];
int charsRead = 0;
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
while ((charsRead = in.read(buffer)) != -1) {
String message = new String(buffer).substring(0, charsRead);
Log.e("In While", "msg :"+message);
}
}
The javadoc of BufferedReader.readLine()
states:
Read a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed.
If the card doesn't send some kind of end of line, this method will never return. Try to read directyl from clientSocket.getInputStream()
. This doesn't do any buffering.
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