[英]Android/Java Implements Runnable enters an infinite loop
我正在使用以下代碼連接兩個Android設備P2P。 問題在於,當服務器從客戶端接收數據時,其線程/可運行對象不會停止。
請建議我一種方法來阻止/強制此過程無限循環。
以下是我用於服務器活動的代碼段:
public class ServerThread implements Runnable {
private volatile boolean keepGoing = true;
public void requestStop() {
keepGoing = false;
}
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()));
line = null;
while ((line = in.readLine()) != null) {
Log.d("ServerActivity", line);
handler.post(new Runnable() {
@Override
public void run() {
serverStatus.setText(line);
Log.d("IP recevied", line);
requestStop();
//finish();
//Intent i = new Intent(ServerActivity.this,
//ClientActivity.class);
//startActivity(i);
//serverStatus.setText(line);
// do whatever you want to the front end
// this is where you can be creative
}
});
}
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();
}
}
}
編輯:
while (keepGoing) {
// 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()));
line = null;
while (((line = in.readLine()) != null) && keepGoing) {
Log.d("ServerActivity", line);
handler.post(new Runnable() {
@Override
public void run() {
serverStatus.setText(line);
Log.d("IP recevied", line);
requestStop();
//finish();
//Intent i = new Intent(ServerActivity.this,
//ClientActivity.class);
//startActivity(i);
//serverStatus.setText(line);
// do whatever you want to the front end
// this is where you can be creative
}
});
}
我認為問題在於,即使您發出信號通知服務器停止,它仍然停留在對serverSocket.accept();
的調用中serverSocket.accept();
,等待其他客戶端連接。 您還應該在stop方法中關閉套接字:
public void requestStop() {
keepGoing = false;
serverSocket.close();
}
強制代碼引發IOException
,然后重新檢查while
條件並退出。
你為什么評論這句話
//finish();
一旦建立連接?
由於一旦連接就永遠無法完成,便會陷入無限循環
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.