网络获取状态

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package bwie.com.example.lenovo.zhangjun20171018;
import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.net.ConnectivityManager;import android.net.NetworkInfo;
/** * Created by lenovo on 2017/10/18. */public class NetWorkUtil {
    public static boolean isNetworkConnected(Context context) {        if (context != null) {            ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo networkInfo = manager.getActiveNetworkInfo();            if (networkInfo != null) {                return networkInfo.isAvailable();            }        }        return false;    }
    public static void showNoNetWorkDlg(final Context context) {        AlertDialog.Builder builder = new AlertDialog.Builder(context);        builder.setMessage("网络未连接,是否去设置")                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override                    public void onClick(DialogInterface dialog, int which) {                        // 跳转到系统的网络设置界面                        Intent intent = null;                        // 先判断当前系统版本                        if (android.os.Build.VERSION.SDK_INT > 10) {  // 3.0以上                            intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);                        } else {                            intent = new Intent();                            intent.setClassName("com.android.settings", "com.android.settings.WirelessSettings");                        }                        context.startActivity(intent);
                    }                }).setNegativeButton("取消", null).show();    }}
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