网络的连接

public class NetworkUtil {

public static void checkNetworkstate(final Activity activity) {

try {

//

ConnectivityManager manner=(ConnectivityManager) activity.getSystemService(activity.CONNECTIVITY_SERVICE);

NetworkInfo active=manner.getActiveNetworkInfo();

if (active==null) {

AlertDialog.Builder dialog=new AlertDialog.Builder(activity);

dialog.setMessage("没网");

dialog.setPositiveButton("打开网络", new OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

Intent intent=new Intent(Settings.ACTION_WIRELESS_SETTINGS);

activity.startActivity(intent);

}

});

dialog.setNegativeButton("取消", null);

dialog.show();

}

} catch (Exception e) {

// TODO: handle exception

}

}

}