安卓判断能否联网代码案例

权限要求:

 <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

//context上下文 如果返回值不为空则可以联网 
public static boolean isNetworkConn(Context context)
    {
        boolean flag = false;

        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);


        NetworkInfo info = manager.getActiveNetworkInfo();

        if (info!=null) {

            return info.isConnected();
        }

        return flag;
    }