Android 监听wifi广播的两种方式
jopen
11年前
1.XML中声明
<receiver android:name=".NetworkConnectChangedReceiver" >
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
<action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
<action android:name="android.net.wifi.STATE_CHANGE" />
</intent-filter>
</receiver>
2.代码中注册
IntentFilter filter = new IntentFilter();
filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(new NetworkConnectChangedReceiver(), filter);
3.实现
package com.example.testss; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.NetworkInfo.State; import android.net.wifi.WifiManager; import android.os.Parcelable; import android.util.Log; public class NetworkConnectChangedReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {// 这个监听wifi的打开与关闭，与wifi的连接无关 int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0); Log.e("H3c", "wifiState" + wifiState); switch (wifiState) { case WifiManager.WIFI_STATE_DISABLED: break; case WifiManager.WIFI_STATE_DISABLING: break; // } } // 这个监听wifi的连接状态即是否连上了一个有效无线路由，当上边广播的状态是WifiManager.WIFI_STATE_DISABLING，和WIFI_STATE_DISABLED的时候，根本不会接到这个广播。 // 在上边广播接到广播是WifiManager.WIFI_STATE_ENABLED状态的同时也会接到这个广播，当然刚打开wifi肯定还没有连接到有效的无线 if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) { Parcelable parcelableExtra = intent .getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO); if (null != parcelableExtra) { NetworkInfo networkInfo = (NetworkInfo) parcelableExtra; State state = networkInfo.getState(); boolean isConnected = state == State.CONNECTED;// 当然，这边可以更精确的确定状态 Log.e("H3c", "isConnected" + isConnected); if (isConnected) { } else { } } } // 这个监听网络连接的设置，包括wifi和移动数据的打开和关闭。. // 最好用的还是这个监听。wifi如果打开，关闭，以及连接上可用的连接都会接到监听。见log // 这个广播的最大弊端是比上边两个广播的反应要慢，如果只是要监听wifi，我觉得还是用上边两个配合比较合适 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { <p> ConnectivityManager manager = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo gprs = manager .getNetworkInfo(ConnectivityManager.TYPE_MOBILE); NetworkInfo wifi = manager .getNetworkInfo(ConnectivityManager.TYPE_WIFI);</p><p> Log.i(TAG, "网络状态改变:" + wifi.isConnected() + " 3g:" + gprs.isConnected());</p><p> NetworkInfo info = intent .getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO); if (info != null) { Log.e("H3c", "info.getTypeName()" + info.getTypeName()); Log.e("H3c", "getSubtypeName()" + info.getSubtypeName()); Log.e("H3c", "getState()" + info.getState()); Log.e("H3c", "getDetailedState()" + info.getDetailedState().name()); Log.e("H3c", "getDetailedState()" + info.getExtraInfo()); Log.e("H3c", "getType()" + info.getType()); if (NetworkInfo.State.CONNECTED == info.getState()) { } else if (info.getType() == 1) { if (NetworkInfo.State.DISCONNECTING == info.getState()) { } } } } } }</p>