Android获取IP地址的两种方式（准确版）

最近看了好多网上获取IP地址的例子，发现好多都不完全准确，这里我写一下获取ip地址的两种方式。

比如微信支付，后台在做接口的时候，要求App端传入IP地址，我们需要判断是网络环境，WI-FI还是3G，所以需要获取这两种环境的ip地址。

第一步：首先是判断网络环境：

String ip;
ConnectivityManager conMann = (ConnectivityManager) 
				this.getSystemService(Context.CONNECTIVITY_SERVICE);
			NetworkInfo mobileNetworkInfo = conMann.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
			NetworkInfo wifiNetworkInfo = conMann.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
		if (mobileNetworkInfo.isConnected()) {
			ip = getLocalIpAddress();	
			System.out.println('本地ip-----'+ip);
		}else if(wifiNetworkInfo.isConnected())
		{
			WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);  
			WifiInfo wifiInfo = wifiManager.getConnectionInfo();       
		    int ipAddress = wifiInfo.getIpAddress();   
		    ip = intToIp(ipAddress); 
		    System.out.println('wifi_ip地址为------'+ip);
		}	

如果连接的是移动网络，第二步，获取本地ip地址：getLocalIpAddress();这样获取的是ipv4格式的ip地址。

public String getLocalIpAddress() {  
        try {  
            String ipv4;  
            ArrayList<NetworkInterface>  nilist = Collections.list(NetworkInterface.getNetworkInterfaces());  
            for (NetworkInterface ni: nilist)   
            {  
                ArrayList<InetAddress>  ialist = Collections.list(ni.getInetAddresses());  
                for (InetAddress address: ialist){  
                    if (!address.isLoopbackAddress() && InetAddressUtils.isIPv4Address(ipv4=address.getHostAddress()))   
                    {   
                        return ipv4;  
                    }  
                }  
            }  
        } catch (SocketException ex) {  
            Log.e('localip', ex.toString());  
        }  
        return null;  
    }  

如果连接的是WI-FI网络，第三步，获取WI-FI ip地址：intToIp(ipAddress);

public static String intToIp(int ipInt) {  
	        StringBuilder sb = new StringBuilder();  
	        sb.append(ipInt & 0xFF).append('.');  
	        sb.append((ipInt >> 8) & 0xFF).append('.');  
	        sb.append((ipInt >> 16) & 0xFF).append('.');  
	        sb.append((ipInt >> 24) & 0xFF);  
	        return sb.toString();  
	    }  

网上的很多代码获取的是ipv6的本地ip，在微信支付里这种ip地址无法调起微信支付，附代码：

	    private String getlocalIp() {
	    	 String ip;
	    	    try {  
	    	        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {  
	    	            NetworkInterface intf = en.nextElement();  
	    	            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {  
	    	                InetAddress inetAddress = enumIpAddr.nextElement();  
	    	                if (!inetAddress.isLoopbackAddress()&&!inetAddress.isLinkLocalAddress()) {  
//	    	                	ip=inetAddress.getHostAddress().toString();
	    	                	System.out.println('ip=========='+inetAddress.getHostAddress().toString());
	    	                    return inetAddress.getHostAddress().toString(); 
	    	                }  
	    	            }  
	    	        }  
	    	    } catch (SocketException ex) {  
	    	        Log.e('WifiPreference IpAddress', ex.toString());  	    	    
	    	} 
		return null;
	}