android4.0后无法向Servlet发送请求解决办法

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()       
        .detectDiskReads()       
        .detectDiskWrites()       
        .detectNetwork()   // or .detectAll() for all detectable problems       
        .penaltyLog()       
        .build());       
StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()       
        .detectLeakedSqlLiteObjects()    
        .penaltyLog()       
        .penaltyDeath()       
        .build());