Question

我创建了一个类来检查设备上的互联网访问，我的类代码是

public class CheckInternet  {


private static Handler h = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what != 1) { // code if not connected
                status = false;
                System.out.println("Status False");
            } else { // code if connected
                status = true;
                System.out.println("Status True");
            }
        }
    };

private static  void isNetworkAvailable(final Handler handler, final int timeout) {
        new Thread() {
            private boolean responded = false;  
            @Override
            public void run() {
                new Thread() {
                    @Override
                    public void run() {
                        HttpGet requestForTest = new HttpGet("http://m.google.com");
                        try {
                            new DefaultHttpClient().execute(requestForTest); // can last...
                            responded = true;
                        } catch (Exception e) {}
                    }

                }.start();

                try {
                    int waited = 0;
                    while(!responded && (waited < timeout)) {
                        sleep(100);
                        if(!responded ) { 
                            waited += 100;
                        }
                    }
                } 
                catch(InterruptedException e) {} // do nothing 
                finally { 
                    if (!responded) { handler.sendEmptyMessage(0); 


                    } 
                    else { handler.sendEmptyMessage(1); 
                    }
                }

            }

        }.start();



    }
}

我想创建一个公共静态布尔方法，它返回状态，我已经提出了一些代码

private static Boolean status = true ;    
public static Boolean isConnected() {
            Runnable runnable = new Runnable() {
                public void run() {
                    // TODO Auto-generated method stub
                    isNetworkAvailable(h,2000);
                }
            };
            runnable.run();
            return status;
        }

但问题是它总是返回旧的状态值，因为在线程运行的时候，该方法会向我发送旧的状态值。我想获得更新的状态值。

Answer 1

你最好使用

isReachable（超时）

http://docs.oracle.com/javase/6/docs/api/java/net/InetAddress.html#isReachable%28java.net.NetworkInterface,%20int,%20int%29

此致

如何创建一个布尔方法来从处理程序返回值

1 个答案: