Android 侦听网络变化_安卓侦听网络变化代码-优快云博客

本文链接：https://blog.youkuaiyun.com/casual_clover/article/details/124101346

本文介绍了如何在Android应用程序中监听网络连接的变化。通过注册广播接收器，可以在网络状态更改时接收到通知，从而实现相应的处理逻辑。

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当网络设置发生变化时，需侦听相应的广播并做处理，代码如下：


public class NetworkUtil {

	 public static final int NETWORK_TYPE_NONE = 0;
	 public static final int NETWORK_TYPE_NULL = 1;
	 public static final int NETWORK_TYPE_ETHERNET_ONLINE = 2;
	 public static final int NETWORK_TYPE_ETHERNET_OFFLINE = 3;
	 public static final int NETWORK_TYPE_MOBILE_ONLINE = 4;
	 public static final int NETWORK_TYPE_MOBILE_OFFLINE = 5;

	 pubic void register() {
		IntentFilter filter = new IntentFilter();
		filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
		 registerReceiver(new BroadcastReceiver() {
		     @Override
		     public void onReceive(Context context, Intent intent) {
		         Log.d(TAG, "[network onReceive] action is " + intent.getAction());
		         if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
		            networkChange(context);
		         }
		     }
		 }, filter);
	 }
 
	/**
	 * 检测网络状态
	 * @param context context
	 * @return  0.无网络 1.断开网络 2.以太网络在线  3.以太网络离线  4.4G网络在线  5.4G网络离线
	 */
	public int networkChange(Context context) {
	    int netstate = NETWORK_TYPE_NONE;
	    ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
	    NetworkInfo activeNetwork = connectivityManager.getActiveNetworkInfo();
	    if (activeNetwork != null) {
	        LogUtils.d(TAG + " network type is " + activeNetwork.getType() + ", connect is " + activeNetwork.isConnected());
	        LogUtils.d(TAG + " available is " + activeNetwork.isAvailable());
	        LogUtils.d(TAG + " state is " + activeNetwork.getState() + " ? " + NetworkInfo.State.CONNECTED);
	        LogUtils.d(TAG + " isFailover is " + activeNetwork.isFailover());
	
	        switch (activeNetwork.getType()) {
	            case ConnectivityManager.TYPE_WIFI:
	            case ConnectivityManager.TYPE_ETHERNET:
	                if (activeNetwork.isConnected() && activeNetwork.isAvailable()) {
	                    netstate = NETWORK_TYPE_ETHERNET_ONLINE;
	                } else {
	                    netstate = NETWORK_TYPE_ETHERNET_OFFLINE;
	                }
	                break;
	            case ConnectivityManager.TYPE_MOBILE:
	                if (activeNetwork.isConnected()  && activeNetwork.isAvailable()) {
	                    netstate = NETWORK_TYPE_MOBILE_ONLINE;
	                } else {
	                    netstate = NETWORK_TYPE_MOBILE_OFFLINE;
	                }
	                break;
	        }
	    } else {
	        LogUtils.d(TAG + " activeNetwork is null.");
	        netstate = NETWORK_TYPE_NULL;
	    }
	
	    LogUtils.d(TAG + "[networkChange] netstate is %d", netstate);
	    setNetworkState(context, netstate);
	    return netstate;
	}
}