android之WIFI网络操作札记

  <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>

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2.确认WIFIManager类的相关介绍和WIFI的状态值

在SDK文档中的docs\reference 搜索WifiManager，可以看到状态值

int WIFI_STATE_DISABLED Wi-Fi is disabled.
int WIFI_STATE_DISABLING Wi-Fi is currently being disabled.
int WIFI_STATE_ENABLED Wi-Fi is enabled.
int WIFI_STATE_ENABLING Wi-Fi is currently being enabled.
int WIFI_STATE_UNKNOWN Wi-Fi is in an unknown state.

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3.WifiManager对象操作

WifiManager wifiManager =(WifiManager)Context.getSystemService(Service_WIFI_SERVICE);

打开WIFI网卡?? wifiManager.setWifiEnable(true);

关闭WIFI网卡?? wifiManager.setWifiEnable(false);

获取状态?????????wifiManager.getWifiState();

4.具体代码如下：

package x2p2.wifi;import android.app.Activity;import android.content.Context;import android.net.wifi.WifiManager;import android.net.wifi.WifiManager.WifiLock;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class ActivityMain extends Activity {    /** Called when the activity is first created. */private Button startButton=null;private Button endButton=null;private Button checkButton=null;private WifiManager wifiManager=null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        startButton =(Button)findViewById(R.id.startWifi);        endButton =(Button)findViewById(R.id.stopWifi);        checkButton=(Button)findViewById(R.id.checkwifi);        startButton.setOnClickListener(new StartWifiListener());        endButton.setOnClickListener(new EndWifiListener());        checkButton.setOnClickListener(new CheckWifiListener());    }        class StartWifiListener implements OnClickListener{  @Override  public void onClick(View v) {   // TODO Auto-generated method stub   wifiManager=(WifiManager)ActivityMain.this.getSystemService(Context.WIFI_SERVICE);   wifiManager.setWifiEnabled(true);   System.out.println("wifi state-->"+wifiManager.getWifiState());   Toast.makeText(ActivityMain.this, "当前wifi网卡状态为"+wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();  }         }        class EndWifiListener implements OnClickListener{  @Override  public void onClick(View v) {   // TODO Auto-generated method stub   wifiManager=(WifiManager)ActivityMain.this.getSystemService(Context.WIFI_SERVICE);   wifiManager.setWifiEnabled(false);   System.out.println("wifi state-->"+wifiManager.getWifiState());   Toast.makeText(ActivityMain.this, "当前wifi网卡状态为"+wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();  }         }        class CheckWifiListener implements OnClickListener{  @Override  public void onClick(View v) {   // TODO Auto-generated method stub   wifiManager=(WifiManager)ActivityMain.this.getSystemService(Context.WIFI_SERVICE);   //wifiManager.setWifiEnabled(false);   System.out.println("wifi state-->"+wifiManager.getWifiState());   Toast.makeText(ActivityMain.this, "当前wifi网卡状态为"+wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();  }         }}

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5：WiFi一些常见操作

package com.yarin.android.Examples_08_08;import java.util.List;import android.content.Context;import android.net.wifi.ScanResult;import android.net.wifi.WifiConfiguration;import android.net.wifi.WifiInfo;import android.net.wifi.WifiManager;import android.net.wifi.WifiManager.WifiLock;public class WifiAdmin{	//定义WifiManager对象	private WifiManager mWifiManager;	//定义WifiInfo对象	private WifiInfo mWifiInfo;	//扫描出的网络连接列表	private List<ScanResult> mWifiList;	//网络连接列表	private List<WifiConfiguration> mWifiConfiguration;	//定义一个WifiLock	WifiLock mWifiLock;	//构造器	public  WifiAdmin(Context context)	{		//取得WifiManager对象		mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);		//取得WifiInfo对象		mWifiInfo = mWifiManager.getConnectionInfo();	}	//打开WIFI	public void OpenWifi()	{		if (!mWifiManager.isWifiEnabled())		{			mWifiManager.setWifiEnabled(true);					}	}	//关闭WIFI	public void CloseWifi()	{		if (!mWifiManager.isWifiEnabled())		{			mWifiManager.setWifiEnabled(false);			}	}	//锁定WifiLock	public void AcquireWifiLock()	{		mWifiLock.acquire();	}	//解锁WifiLock	public void ReleaseWifiLock()	{		//判断时候锁定		if (mWifiLock.isHeld())		{			mWifiLock.acquire();		}	}	//创建一个WifiLock	public void CreatWifiLock()	{		mWifiLock = mWifiManager.createWifiLock("Test");	}	//得到配置好的网络	public List<WifiConfiguration> GetConfiguration()	{		return mWifiConfiguration;	}	//指定配置好的网络进行连接	public void ConnectConfiguration(int index)	{		//索引大于配置好的网络索引返回		if(index > mWifiConfiguration.size())		{			return;		}		//连接配置好的指定ID的网络		mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId, true);	}	public void StartScan()	{		mWifiManager.startScan();		//得到扫描结果		mWifiList = mWifiManager.getScanResults();		//得到配置好的网络连接		mWifiConfiguration = mWifiManager.getConfiguredNetworks();	}	//得到网络列表	public List<ScanResult> GetWifiList()	{		return mWifiList;	}	//查看扫描结果	public StringBuilder LookUpScan()	{		StringBuilder stringBuilder = new StringBuilder();		for (int i = 0; i < mWifiList.size(); i++)		{			stringBuilder.append("Index_"+new Integer(i + 1).toString() + ":");			//将ScanResult信息转换成一个字符串包			//其中把包括：BSSID、SSID、capabilities、frequency、level			stringBuilder.append((mWifiList.get(i)).toString());			stringBuilder.append("\n");		}		return stringBuilder;	}	//得到MAC地址	public String GetMacAddress()	{		return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();	}	//得到接入点的BSSID	public String GetBSSID()	{		return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();	}	//得到IP地址	public int GetIPAddress()	{		return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();	}	//得到连接的ID	public int GetNetworkId()	{		return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();	}	//得到WifiInfo的所有信息包	public String GetWifiInfo()	{		return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();	}	//添加一个网络并连接	public void AddNetwork(WifiConfiguration wcg)	{		int wcgID = mWifiManager.addNetwork(wcg); 		mWifiManager.enableNetwork(wcgID, true); 	}	//断开指定ID的网络	public void DisconnectWifi(int netId)	{		mWifiManager.disableNetwork(netId);		mWifiManager.disconnect();	}}

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