Android應用程序 - Java.Net.SocketException：沒有路由到主機

Question

我正在創建一個Android應用程序，它從媒體服務器流視頻。我使用我的頻道的列表視圖和一個switch語句來控制視頻。在switch語句中有一些簡單的javascript代碼例如：

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

這個工作正常，但隨機拋出這個錯誤很多。我找不到原因，我試過不等待視頻加載和加載新視頻，有時會導致它，有時它不會，我只選擇了4個視頻，並在更改前觀看了5秒鐘，這有時候導致它，有時不。我的logcat顯示如下：

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

您是否在視圖中啓用了javasctript？

webView.getSettings().setJavaScriptEnabled(true); 

此外，您應該考慮在javascript語句的末尾添加冒號。

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

如果無事可做，嘗試捕捉異常，並嘗試一定的次數，還有在Android的網頁視圖和httpclients一些不穩定性。