安卓判断能否联网代码案例

<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;
}