android之WIFI网络操作札记

android之WIFI网络操作笔记
<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WifiLockWifiLock 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WIFIpublic void OpenWifi(){if (!mWifiManager.isWifiEnabled()){mWifiManager.setWifiEnabled(true);}}//关闭WIFIpublic void CloseWifi(){if (!mWifiManager.isWifiEnabled()){mWifiManager.setWifiEnabled(false);}}//锁定WifiLockpublic void AcquireWifiLock(){mWifiLock.acquire();}//解锁WifiLockpublic void ReleaseWifiLock(){//判断时候锁定if (mWifiLock.isHeld()){mWifiLock.acquire();}}//创建一个WifiLockpublic 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、levelstringBuilder.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BSSIDpublic 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IDpublic 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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