网络判断

Main方法

package com.example.zhoukaolx;

import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import com.bwie.xlistviewlibrary.View.XListView;
import com.bwie.xlistviewlibrary.utils.NetWordUtils;
import com.google.gson.Gson;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2018/1/5/005.
 */

public class Fragment01 extends Fragment implements XListView.IXListViewListener{
    String path = "http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page=";
    int page = 1;
    private XListView xlv;
    private List<SuperClass.DataBean> list = new ArrayList<>();
    private MyAdapter adapter;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment01, container, false);
        xlv = view.findViewById(R.id.xlv);
        //调用网络判断类
        boolean b = Panduan.isNetConnected(getActivity());
        if (b == true){
            Toast.makeText(getActivity(),"网络正常",Toast.LENGTH_SHORT).show();
            xlv.setPullLoadEnable(true);
            xlv.setXListViewListener(this);
            adapter = new MyAdapter(list,getActivity());
            xlv.setAdapter(adapter);
            getData(1);
            stop();
        }else{
            Toast.makeText(getActivity(),"网络不正常",Toast.LENGTH_SHORT).show();
            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
            builder.setTitle("设置网络");
            builder.setMessage("没有网络，是否打开？");
            builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    Intent intent;
                    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.ACTION_MAIN);
                        intent.setClassName("com.android.phone", "com.android.phone.NetworkSetting");
                    }
                    startActivity(intent);

                }
            });
            builder.setNegativeButton("取消",null);
            builder.show();
        }
        return view;
    }

    private void stop() {
        xlv.stopRefresh();
        xlv.stopLoadMore();
        xlv.setRefreshTime("刚刚"+System.currentTimeMillis());
    }

    @Override
    public void onRefresh() {

        list.clear();
        getData(1);
    }

    @Override
    public void onLoadMore() {

        page++;
        getData(page);
    }

    public void getData(int page) {
        new MyAsy().execute(path+page);
    }

    private class MyAsy extends AsyncTask<String,Void,String>{
        @Override
        protected String doInBackground(String... strings) {
            return NetWordUtils.getNetjson(path+page);
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            Gson gson = new Gson();
            SuperClass superClass = gson.fromJson(s, SuperClass.class);
            List<SuperClass.DataBean> data = superClass.getData();
            list.addAll(data);
            adapter.notifyDataSetChanged();
            stop();
        }
    }
}

判断
  
  

   
   
package com.example.zhoukaolx;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

/**
 * Created by Administrator on 2018/1/5/005.
 */

public class Panduan {

    public static boolean isNetConnected(Context context) {
        if (context != null) {
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo mWiFiNetworkInfo = mConnectivityManager.
                    getNetworkInfo(ConnectivityManager.TYPE_WIFI);
            if (mWiFiNetworkInfo != null) {
                return mWiFiNetworkInfo.isAvailable();
            }
        }
        return false;
    }
}