Android 应用程序 - Java.Net.SocketException：没有路由到主机

Question

我正在创建一个从媒体服务器流式传输视频的 Android 应用。我正在为我的频道使用列表视图，并使用 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相当多。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，有时不会，我只选择了4个视频并在更改前观看了5秒，有时导致它，有时不会。我的 logcat 显示：

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

您是否在视图上启用了 javasctript ？

webView.getSettings().setJavaScriptEnabled(true);

另外，您应该考虑在 javascript 语句的末尾添加一个冒号。

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

如果没事，尝试捕获异常，尝试一定次数，android中的webviews和httpclients有一些不稳定。