Android 实时监听网络状态

缺乏、安全感 2024-04-18 19:58 68阅读 0赞

转自 [实时监听网络状态][Link 1]

首先 ，在Mannifest 添加权限：

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

新建一个广播

BroadcastReceiver networkReceiver =new BroadcastReceiver(){
    		@Override
    		public void onReceive(Context context, Intent intent) {
    	        String action = intent.getAction();  
    	        if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {  
    	            ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(  
    	                    Context.CONNECTIVITY_SERVICE);  
    	            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();  
    	            if (networkInfo != null && networkInfo.isAvailable()) {  
    	                int type2 = networkInfo.getType();
    	               // String typeName = networkInfo.getTypeName();	                
    	                switch (type2) {  
    	                    case 0://移动网络
    	                    	  break;  
    	                    case 1: //wifi 
    	                         break;  
    	                    case 9:  //以太网
    	                    	break;
    	                }  
    	            } else {// 网络未连接  
    	            }  
    	        }  
    		}
    	};

注册广播

1.静态注册。在清单文件minnifest注册。也就是activity摧毁后，广播还在。
    2.动态注册。activty销毁，广播失效 。

动态注册。

@Override
    protected void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	setContentView(R.layout.activity_main);
    	initReceiver();
    }
    
    private void initReceiver() {
    	IntentFilter timeFilter = new IntentFilter();  
    	timeFilter.addAction("android.net.ethernet.ETHERNET_STATE_CHANGED");
    	timeFilter.addAction("android.net.ethernet.STATE_CHANGE");
    	timeFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
    	timeFilter.addAction("android.net.wifi.WIFI_STATE_CHANGED");
    	timeFilter.addAction("android.net.wifi.STATE_CHANGE");
    	timeFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
    	registerReceiver(networkReceiver, timeFilter);  
    }

在ondestory()销毁：

@Override
    	protected void onDestroy() {
    		super.onDestroy();
    		if (networkReceiver != null) {  
                unregisterReceiver(networkReceiver);  
                networkReceiver = null;  
    		}  
    	}

[Link 1]: https://blog.csdn.net/u012560369/article/details/80579029