我想要制作一个应用程序（两个应用程序用于移动设备（服务器）和一个用于平板电脑（客户端）），这将允许两个Android设备（一个移动设备和一个平板电脑）之间发送和接收消息。我已设法让两个设备连接但我无法弄清楚如何实际发送消息，然后在另一台设备上显示它。
请帮助：）
移动端（服务器）
public class TabSMSMobileSideActivity extends Activity {
// default ip
public static String SERVERIP = "10.0.2.15";
// designate a port
public static final int SERVERPORT = 8080;
private Thread fst;
private TextView serverStatus;
private Handler handler = new Handler();
private ServerSocket serverSocket;
private Button btnStartServer;
private TextView txtMessage;
// instruction protocol
String messageIn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.server);
serverStatus = (TextView) findViewById(R.id.server_status);
txtMessage = (TextView) findViewById(R.id.txtRecieved);
btnStartServer = (Button) findViewById(R.id.btnStartServer);
btnStartServer.setOnClickListener(btnStartServerOnClick);
}
private OnClickListener btnStartServerOnClick = new OnClickListener() {
public void onClick(View v) {
SERVERIP = getLocalIpAddress();
fst = new Thread(new ServerThread());
fst.start();
}
};
void read(TextView target) {
while (1 > 0) {
try {
serverSocket = new ServerSocket(SERVERPORT);
Socket client = serverSocket.accept();
BufferedReader in = new BufferedReader(new InputStreamReader(
client.getInputStream()));
target.setText(in.readLine());
} catch (IOException e1) {
}
}
}
public class ServerThread implements Runnable {
public void run() {
try {
if (SERVERIP != null) {
handler.post(new Runnable() {
@Override
public void run() {
serverStatus
.setText("Listening on IP: " + SERVERIP);
}
});
serverSocket = new ServerSocket(SERVERPORT);
while (true) {
// listen for incoming clients
Socket client = serverSocket.accept();
handler.post(new Runnable() {
@Override
public void run() {
serverStatus.setText("Connected.");
}
});
try {
BufferedReader in = new BufferedReader(
new InputStreamReader(
client.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
Log.d("ServerActivity", line);
handler.post(new Runnable() {
@Override
public void run() {
// run all in and out messages through
// here
read(txtMessage);
}
});
}
break;
} catch (Exception e) {
handler.post(new Runnable() {
@Override
public void run() {
serverStatus
.setText("Oops. Connection interrupted. Please reconnect your phones.");
}
});
e.printStackTrace();
}
}
} else {
handler.post(new Runnable() {
@Override
public void run() {
serverStatus
.setText("Couldn't detect internet connection.");
}
});
}
} catch (Exception e) {
handler.post(new Runnable() {
@Override
public void run() {
serverStatus.setText("Error");
}
});
e.printStackTrace();
}
}
}
// gets the ip address of your phone's network
private String getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface
.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf
.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) {
return inetAddress.getHostAddress().toString();
}
}
}
} catch (SocketException ex) {
Log.e("ServerActivity", ex.toString());
}
return null;
}
@Override
protected void onStop() {
super.onStop();
try {
// make sure you close the socket upon exiting
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
客户
public class TabSMSActivity extends Activity {
private EditText serverIp;
private Button connectPhones;
private EditText txtSendMessage;
private String serverIpAddress = "";
private boolean connected = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.inbox);
serverIp = (EditText) findViewById(R.id.server_ip);
txtSendMessage = (EditText) findViewById(R.id.txtSendMessage);
connectPhones = (Button) findViewById(R.id.connect_phones);
connectPhones.setOnClickListener(connectListener);
}
private OnClickListener connectListener = new OnClickListener() {
public void onClick(View v) {
if (!connected) {
serverIpAddress = serverIp.getText().toString();
if (!serverIpAddress.equals("")) {
Thread cThread = new Thread(new ClientThread());
cThread.start();
}
}
}
};
public class ClientThread implements Runnable {
public void run() {
try {
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
Log.d("ClientActivity", "C: Connecting...");
Socket socket = new Socket(serverAddr, 8080);
connected = true;
while (connected) {
try {
Log.d("ClientActivity", "C: Sending command.");
PrintWriter out = new PrintWriter(
new BufferedWriter(new OutputStreamWriter(
socket.getOutputStream())), true);
// where you issue the commands
out.println("Hey Server!");
txtSendMessage.setText("Hey Server");
Log.d("ClientActivity", "C: Sent.");
} catch (Exception e) {
Log.e("ClientActivity", "S: Error", e);
}
}
socket.close();
Log.d("ClientActivity", "C: Closed.");
} catch (Exception e) {
Log.e("ClientActivity", "C: Error", e);
connected = false;
}
}
}
}