Android 网络状态实时监听代码实例(一)
作者:智慧云端日记
本文给大家介绍Android 网络状态实时监听代码实例(一),对android网络状态监听相关知识感兴趣的朋友一起学习吧
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<netEventHandler> mListeners = new ArrayList<netEventHandler>(); 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; } }
以上所述是小编给大家介绍的Android 网络状态实时监听代码实例(一),希望对大家有所帮助!