java - Android 应用程序 - Java.Net.SocketException : No route to host

Question

我正在创建一个 Android 应用程序，它从媒体服务器流式传输视频。我使用 channel ListView 和 switch 语句来控制视频。在 switch 语句中有一些简单的 JavaScript 代码，例如:

webView.loadUrl("javascript:void(jwplayer().playlistItem(2))");

这工作正常，但随机抛出这个错误很多。我找不到原因，我试过不等待视频加载并加载新视频，有时会导致它，有时不会，我只选择了 4 个视频并在更改之前观看了 5 秒，有时会这样导致它，有时则不会。我的 logcat 显示了这一点:

03-20 14:19:29.710: D/dalvikvm(14679): GC_CONCURRENT freed 426K, 8% free 7600K/8199K, paused 3ms+3ms
03-20 14:20:32.490: D/dalvikvm(14679): threadid=18: still suspended after undo (sc=1 dc=1)
03-20 14:20:32.540: D/dalvikvm(14679): threadid=18: still suspended after undo (sc=1 dc=1)
03-20 14:20:32.550: D/dalvikvm(14679): GC_CONCURRENT freed 426K, 8% free 7599K/8199K, paused 4ms+3ms
03-20 14:20:37.220: W/System.err(14679): java.net.SocketException: No route to host
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.platform.OSNetworkSystem.connect(Native Method)
03-20 14:20:37.220: W/System.err(14679):    at dalvik.system.BlockGuard$WrappedNetworkSystem.connect(BlockGuard.java:369)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:208)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:431)
03-20 14:20:37.220: W/System.err(14679):    at java.net.Socket.connect(Socket.java:901)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:75)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:48)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection$Address.connect(HttpConnection.java:304)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:89)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getHttpConnect ion(HttpURLConnectionImpl.java:292)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.makeConnection(HttpURLConnectionImpl.java:274)
03-20 14:20:37.220: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:217)
03-20 14:20:37.230: W/System.err(14679):    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:624)
03-20 14:20:37.230: W/System.err(14679):    at dalvik.system.NativeStart.run(Native Method)
03-20 14:20:37.230: W/System.err(14679):    at dalvik.system.NativeStart.run(Native Method)

Answer 1

您是否在 View 上启用了 javasctript？

webView.getSettings().setJavaScriptEnabled(true);

此外，您应该考虑在 javascript 语句末尾添加冒号。

webView.loadUrl("javascript:void(jwplayer().playlistItem(2));");

如果没什么可做的，就 try catch 异常，尝试一定次数，android中的webviews和httpclients都存在一些不稳定的情况。