新的Java类：
public class ConnectionChangeReceiver extends BroadcastReceiver{ @Override public void onReceive( Context context, Intent intent ) { ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService( Context.CONNECTIVITY_SERVICE ); NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo(); NetworkInfo mobNetInfo = connectivityManager.getNetworkInfo( ConnectivityManager.TYPE_MOBILE ); if ( activeNetInfo != null ) { Toast.makeText( context, "Active Network Type : " + activeNetInfo.getTypeName(), Toast.LENGTH_SHORT ).show(); } if( mobNetInfo != null ) { Toast.makeText( context, "Mobile Network Type : " + mobNetInfo.getTypeName(), Toast.LENGTH_SHORT ).show(); } }}你的AndroidManifest.xml中“ manifest”元素下的新xml：
<!-- Needed to check when the network connection changes --><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
你的AndroidManifest.xml中“ application”元素下的新xml：
<receiver android:name="com.blackboard.androidtest.receiver.ConnectionChangeReceiver" android:label="NetworkConnection"> <intent-filter> <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/> </intent-filter></receiver>
