Android获取当前网络状态

效果图

• 有网络
  

• 没有网络
  

源码

下载地址（Android Studio工程）：http://download.csdn.net/detail/q4878802/9052833

添加获取网络状态的权限

<!-- 获取网络状态的权限 -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

工具类

package com.kongqw.kqwnetworkdemo.engine;import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.widget.Toast;/*** Created by kongqw on 2015/8/27.*/
public class KqwNetworkUtil {/*** 构造私有化 不允许创建对象*/private KqwNetworkUtil() {}/*** 获取当前的网络状态是否可用** @param context* @return*/public static boolean getNetworkState(Context context) {// 获取手机所有连接管理对象（包括对wi-fi,net等连接的管理）ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);// 获取NetworkInfo对象NetworkInfo[] networkInfos = connectivityManager.getAllNetworkInfo();// 遍历每一个对象for (NetworkInfo networkInfo : networkInfos) {if (networkInfo.getState() == NetworkInfo.State.CONNECTED) {// debug信息Toast.makeText(context,"TypeName = " + networkInfo.getTypeName(),Toast.LENGTH_SHORT).show();// 网络状态可用return true;}}// 没有可用的网络return false;}
}

测试类

package com.kongqw.kqwnetworkdemo;import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;import com.kongqw.kqwnetworkdemo.engine.KqwNetworkUtil;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);if (KqwNetworkUtil.getNetworkState(this)) {Toast.makeText(this, "当前网络可用", Toast.LENGTH_SHORT).show();} else {Toast.makeText(this, "当前网络不可用", Toast.LENGTH_SHORT).show();}}
}