Android 判断当前网络 wifi ctwap(cmwap) ctnet(cmnet)-优快云博客

本文介绍了一个Android应用程序，该程序能够获取并显示设备的本地主机信息、Wi-Fi详细信息及网络状态。通过调用不同的API，它能展示如主机名、IP地址、SSID等关键网络参数。

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package lab.sodino.net; 

 import java.net.InetAddress; 

 import android.app.Activity; 
 import android.content.Context; 
 import android.net.ConnectivityManager; 
 import android.net.NetworkInfo; 
 import android.net.wifi.WifiInfo; 
 import android.net.wifi.WifiManager; 
 import android.os.Bundle; 
 import android.widget.ScrollView; 
 import android.widget.TextView; 

 public class NetAct extends Activity { 
 	private TextView textView; 

 	public void onCreate(Bundle savedInstanceState) { 
 		super.onCreate(savedInstanceState); 
 		textView = new TextView(this); 
 		textView.setBackgroundColor(0xffffffff); 
 		textView.setTextColor(0xff0000ff); 
 		textView.setTextSize(15.0f); 
 		textView.setScrollBarStyle(TextView.SCROLLBARS_OUTSIDE_OVERLAY); 

 		ScrollView scrollView = new ScrollView(this); 
 		scrollView.addView(textView); 
 		setContentView(scrollView); 
 		getLocalHost(); 
 		getWifiInfo(); 
 		initNetworkInfo(); 
 	} 

 	private void getLocalHost() { 
 		try { 
 			InetAddress iAdd = InetAddress.getLocalHost(); 
 			String line = ""; 
 			String hostName = iAdd.getHostName(); 
 			if (hostName != null) { 
 				InetAddress[] adds = InetAddress.getAllByName(hostName); 
 				for (int i = 0; i  < adds.length; i++) { 
 					iAdd = adds[i]; 
 					line = "HostName=" + iAdd.getHostName() + "\n"; 
 					textView.append(line); 
 					line = "CanonicalHostName=" + iAdd.getCanonicalHostName() 
 							+ "\n"; 
 					textView.append(line); 
 					line = "HostAddress=" + iAdd.getHostAddress() + "\n"; 
 					textView.append(line); 
 					textView.append("\n"); 
 				} 
 			} 
 		} catch (Exception e) { 
 			e.printStackTrace(); 

 		} 
 	} 

 	public void getWifiInfo() { 
 		WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); 
 		WifiInfo info = wifi.getConnectionInfo(); 
 		textView.append("HiddenSSID=" + info.getHiddenSSID() + "\n"); 
 		textView.append("IpAddress=" + info.getIpAddress() + "\n"); 
 		textView.append("LinkSpeed=" + info.getLinkSpeed() + "\n"); 
 		textView.append("NetworkId=" + info.getNetworkId() + "\n"); 
 		textView.append("Rssi=" + info.getRssi() + "\n"); 
 		textView.append("SSID=" + info.getSSID() + "\n"); 
 		textView.append("MacAddress=" + info.getMacAddress() + "\n"); 
 	} 

 	public void initNetworkInfo() { 
 		ConnectivityManager mag = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
 		// 此处输出当前可用网络 
 		textView.append("\nActive:\n"); 
 		NetworkInfo info = mag.getActiveNetworkInfo(); 
 		textView.append("ExtraInfo=" + info.getExtraInfo() + "\n"); 
 		textView.append("SubtypeName=" + info.getSubtypeName() + "\n"); 
 		textView.append("TypeName=" + info.getTypeName() + "\n"); 

 		textView.append("\nWifi:\n"); 
 		NetworkInfo wifiInfo = mag 
 				.getNetworkInfo(ConnectivityManager.TYPE_WIFI); 

 		textView.append("ExtraInfo=" + wifiInfo.getExtraInfo() + "\n"); 
 		textView.append("SubtypeName=" + wifiInfo.getSubtypeName() + "\n"); 
 		textView.append("TypeName=" + wifiInfo.getTypeName() + "\n"); 
 		NetworkInfo mobInfo = mag 
 				.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); 
 		textView.append("\nMobile:\n"); 
 		textView.append("ExtraInfo=" + mobInfo.getExtraInfo() + "\n"); 
 		textView.append("SubtypeName=" + mobInfo.getSubtypeName() + "\n"); 
 		textView.append("TypeName=" + mobInfo.getTypeName() + "\n"); 
 	} 
 }