android 程序中判断当前是否连接网络，网络是否可用

if(checkNetWorkStatus(getApplicationContext()))
{
			
　　//当前网络可用
}else
{
　　//当前网络不可用
　　return -1;
}

 

public static boolean checkNetWorkStatus(Context context) 
    {
        boolean result;
        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netinfo = cm.getActiveNetworkInfo();
        if (netinfo != null && netinfo.isConnected()) {
            result = true;
            Log.i("NetStatus", "The net was connected");
        } else {
            result = false;
            Log.i("NetStatus", "The net was bad!");
        }
        return result;
    }