Question

private String urlPost = "http://192.168.1.66:8080/DataCollectionServlet/";

@Override
protected void doWakefulWork(Intent intent) {
    // https://stackoverflow.com/q/14630255/281545
    HttpURLConnection connection = null;
    try {
        connection = connection();
        w("connection"); // allrigt
        final OutputStream connOutStream = connection.getOutputStream();
        w("GEToUTPUTsTREAM"); // I never see this
    } catch (IOException e) {
        e.printStackTrace(); // No route to host
    } finally {
        if (connection != null) connection.disconnect();
    }
}

private HttpURLConnection connection() throws MalformedURLException,
        IOException {
    HttpURLConnection connection = (HttpURLConnection) new URL(urlPost)
            .openConnection();
    // connection.setDoInput(true);
    connection.setDoOutput(true); // triggers POST
    // connection.setUseCaches(false); // needed ?
    // TODO : http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
    // connection.setRequestProperty("Connection", "Keep-Alive");
    // connection.setRequestProperty("User-Agent",
    // "Android Multipart HTTP Client 1.1"); // needed ?
    return connection;
}

192.168.1.66:8080/DataCollectionServlet/中的服务器已启动并正在运行。我的device IP是192.168.1.65。我禁用了窗口和路由器的防火墙都无济于事。

编辑 - 堆栈跟踪：

java.net.SocketException: No route to host
at org.apache.harmony.luni.platform.OSNetworkSystem.connect(Native Method)
at dalvik.system.BlockGuard$WrappedNetworkSystem.connect(BlockGuard.java:357)
at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:204)
at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:437)
at java.net.Socket.connect(Socket.java:983)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:75)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:48)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection$Address.connect(HttpConnection.java:322)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:89)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getHttpConnection(HttpURLConnectionImpl.java:285)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.makeConnection(HttpURLConnectionImpl.java:267)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:205)
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:614)
at gr.uoa.di.monitoring.android.services.NetworkService.doWakefulWork(NetworkService.java:51)
at com.commonsware.cwac.wakeful.WakefulIntentService.onHandleIntent(WakefulIntentService.java:94)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:59)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.os.HandlerThread.run(HandlerThread.java:60)

评论：同样，手机和PC都无线连接到同一个路由器（相同的SSID）

Android 2.3.7 Eclair，HTC Nexus 1 - 这可能是个错误吗？

编辑2013.11.13：仍然对my answer

的解释感兴趣

Answer 1

很好 - 在我连接的路由器上禁用（WPA-PSK）加密。我会接受一个（程序化的）工作的答案

编辑：在Android设备的浏览器中输入URL我看到了doGet()页面。我重新启用了所有防火墙 - 唯一有所作为的是打开和关闭加密

在getOutputStream（）上的设备上“没有主机路由” - 无线连接

1 个答案: