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Android实时监听网络状态

发布日期：2021-11-12 07:57:03 浏览次数：24 分类：技术文章

本文共 4091 字，大约阅读时间需要 13 分钟。

原文地址：http://blog.csdn.net/github_30662571/article/details/51317112

其实手机在网络方面的的监听也比较重要，有时候我们必须实时监控这个程序的实时网络状态，android在网络断开与连接的时候都会发出广播，我们通过接收系统的广播就可以实现网络的监听。

1、添加访问网络和获取网络状态的权限

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<uses-permission android:name="android.permission.INTERNET" />

2、新建一个Application类并继承android.app.Application 申明变量保存网络状态

package com.javen.application;import com.javen.netbroadcast.NetUtil;public class Application extends android.app.Application {    private static Application mApplication;    public static int mNetWorkState;    public static synchronized Application getInstance() {        return mApplication;    }    @Override    public void onCreate() {        super.onCreate();        mApplication = this;        initData();    }    public void initData() {        mNetWorkState = NetUtil.getNetworkState(this);    }}

3、新建NetBroadcastReceiver类继承BroadcastReceiver 并实现onReceive方法在onReceive方法通知接口完成加载

package com.javen.receiver;import java.util.ArrayList;import com.javen.application.Application;import com.javen.netbroadcast.NetUtil;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;public class NetBroadcastReceiver extends BroadcastReceiver {    public static ArrayList
      
        mListeners = new ArrayList
       
        ();    private static String NET_CHANGE_ACTION = "android.net.conn.CONNECTIVITY_CHANGE";    @Override    public void onReceive(Context context, Intent intent) {        if (intent.getAction().equals(NET_CHANGE_ACTION)) {            Application.mNetWorkState = NetUtil.getNetworkState(context);            if (mListeners.size() > 0)// 通知接口完成加载                for (netEventHandler handler : mListeners) {                    handler.onNetChange();                }        }    }    public static abstract interface netEventHandler {        public abstract void onNetChange();    }}

4、在应该的Activity中实现netEventHandler接口

package com.javen.netbroadcast;import com.javen.receiver.NetBroadcastReceiver;import com.javen.receiver.NetBroadcastReceiver.netEventHandler;import com.javen.ui.base.BaseActivity;import android.os.Bundle;import android.view.Menu;public class MainActivity extends BaseActivity implements netEventHandler{        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        NetBroadcastReceiver.mListeners.add(this);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public void onNetChange() {        // TODO Auto-generated method stub        if (NetUtil.getNetworkState(this) == NetUtil.NETWORN_NONE) {            T.showLong(this, R.string.net_err);        }else {            T.showLong(this, "网络可以使用");        }    }}

5、判断网络的工具类

package com.javen.netbroadcast;import android.content.Context;import android.net.ConnectivityManager;import android.net.NetworkInfo.State;public class NetUtil {    public static final int NETWORN_NONE = 0;    public static final int NETWORN_WIFI = 1;    public static final int NETWORN_MOBILE = 2;    public static int getNetworkState(Context context) {        ConnectivityManager connManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        // Wifi        State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)                .getState();        if (state == State.CONNECTED || state == State.CONNECTING) {            return NETWORN_WIFI;        }        // 3G        state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)                .getState();        if (state == State.CONNECTED || state == State.CONNECTING) {            return NETWORN_MOBILE;        }        return NETWORN_NONE;    }}  
  
   记得在manifest中注册

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