android网络状态判断

	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");

补充：移动开发 , Android ,

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