Android 连接Wifi和创建Wifi热点的实例

本文实例讲述了连接wifi和创建wifi热点的方法。分享给大家供大家参考，具体如下：

android的热点功能不可见，用了反射的技术搞定之外。 

eclipse设置语言为utf-8才能查看中文注释

上代码：

mainactivity.java

package com.widget.hotspot; 
import android.os.bundle; 
import android.app.activity; 
import android.content.broadcastreceiver; 
import android.content.context; 
import android.content.intent; 
import android.content.intentfilter; 
import android.util.log; 
import android.view.menu; 
import android.view.view; 
import android.widget.button; 
 
public class mainactivity extends activity { 
 
  public static final string tag = "mainactivity"; 
   
  private button mbtn1, mbtn2; 
   
  private wifiadmin mwifiadmin; 
   
  private context mcontext = null; 
  @override 
  protected void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
     
    mcontext = this; 
     
    setcontentview(r.layout.activity_main); 
     
    mbtn1 = (button)findviewbyid(r.id.button1); 
    mbtn2 = (button)findviewbyid(r.id.button2); 
    mbtn1.settext("点击连接wifi"); 
    mbtn2.settext("点击创建wifi热点"); 
    mbtn1.setonclicklistener(new button.onclicklistener() { 
       
      @override 
      public void onclick(view v) { 
        // todo auto-generated method stub 
 
        mwifiadmin = new wifiadmin(mcontext) { 
           
          @override 
          public void myunregisterreceiver(broadcastreceiver receiver) { 
            // todo auto-generated method stub 
            mainactivity.this.unregisterreceiver(receiver); 
          } 
           
          @override 
          public intent myregisterreceiver(broadcastreceiver receiver, 
              intentfilter filter) { 
            // todo auto-generated method stub 
            mainactivity.this.registerreceiver(receiver, filter); 
            return null; 
          } 
           
          @override 
          public void onnotifywificonnected() { 
            // todo auto-generated method stub 
            log.v(tag, "have connected success!"); 
            log.v(tag, "###############################"); 
          } 
           
          @override 
          public void onnotifywificonnectfailed() { 
            // todo auto-generated method stub 
            log.v(tag, "have connected failed!"); 
            log.v(tag, "###############################"); 
          } 
        }; 
        mwifiadmin.openwifi(); 
        mwifiadmin.addnetwork(mwifiadmin.createwifiinfo("you_wifi", "mm123456", wifiadmin.type_wpa)); 
         
      } 
    }); 
     
    mbtn2.setonclicklistener(new button.onclicklistener() { 
       
      @override 
      public void onclick(view v) { 
        // todo auto-generated method stub 
         
        wifiapadmin wifiap = new wifiapadmin(mcontext); 
        wifiap.startwifiap("\"hotspot\"", "hhhhhh123"); 
      } 
    }); 
     
  } 
 
  @override 
  public boolean oncreateoptionsmenu(menu menu) { 
    // inflate the menu; this adds items to the action bar if it is present. 
    getmenuinflater().inflate(r.menu.activity_main, menu); 
    return true; 
  } 
 
   @override 
    public void onresume() { 
      super.onresume(); 
       
      log.d("rssi", "registered"); 
    } 
 
    @override 
    public void onpause() { 
      super.onpause(); 
       
      log.d("rssi", "unregistered"); 
    } 
   
} 

wifiadmin.java

package com.widget.hotspot;  
import java.util.list; 
import java.util.timer; 
import java.util.timertask; 
import android.content.broadcastreceiver; 
import android.content.context; 
import android.content.intent; 
import android.content.intentfilter; 
import android.net.connectivitymanager; 
import android.net.networkinfo; 
import android.net.networkinfo.detailedstate; 
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; 
import android.util.log; 
 
 
public abstract class wifiadmin { 
   
  private static final string tag = "wifiadmin"; 
   
  private wifimanager mwifimanager; 
  private wifiinfo mwifiinfo; 
  // 扫描出的网络连接列表 
  private list<scanresult> mwifilist; 
  private list<wificonfiguration> mwificonfiguration; 
 
  private wifilock mwifilock; 
   
  private string mpasswd = ""; 
  private string mssid = ""; 
   
  private context mcontext = null; 
 
  public wifiadmin(context context) { 
     
    mcontext = context; 
     
    // 取得wifimanager对象 
    mwifimanager = (wifimanager) context.getsystemservice(context.wifi_service); 
    // 取得wifiinfo对象 
    mwifiinfo = mwifimanager.getconnectioninfo(); 
     
    log.v(tag, "getipaddress = " + mwifiinfo.getipaddress()); 
  } 
 
  // 打开wifi 
  public void openwifi() { 
    if (!mwifimanager.iswifienabled()) { 
      mwifimanager.setwifienabled(true); 
    } 
  } 
 
  // 关闭wifi 
  public void closewifi() { 
    if (mwifimanager.iswifienabled()) { 
      mwifimanager.setwifienabled(false); 
    } 
  } 
 
  public abstract intent myregisterreceiver(broadcastreceiver receiver, intentfilter filter); 
   
  public abstract void myunregisterreceiver(broadcastreceiver receiver); 
   
  public abstract void onnotifywificonnected(); 
   
  public abstract void onnotifywificonnectfailed(); 
   
  // 添加一个网络并连接 
  public void addnetwork(wificonfiguration wcg) { 
     
    register(); 
     
    wifiapadmin.closewifiap(mcontext); 
     
    int wcgid = mwifimanager.addnetwork(wcg); 
    boolean b = mwifimanager.enablenetwork(wcgid, true); 
  } 
   
  public static final int type_no_passwd = 0x11; 
  public static final int type_wep = 0x12; 
  public static final int type_wpa = 0x13; 
   
  public void addnetwork(string ssid, string passwd, int type) { 
    if (ssid == null || passwd == null || ssid.equals("")) { 
      log.e(tag, "addnetwork() ## nullpointer error!"); 
      return; 
    } 
     
    if (type != type_no_passwd && type != type_wep && type != type_wpa) { 
      log.e(tag, "addnetwork() ## unknown type = " + type); 
    } 
     
    stoptimer(); 
    unregister(); 
     
    addnetwork(createwifiinfo(ssid, passwd, type)); 
  } 
 
  private broadcastreceiver mbroadcastreceiver = new broadcastreceiver() { 
 
    @override 
    public void onreceive(context context, intent intent) { 
      // todo auto-generated method stub 
      if (intent.getaction().equals(wifimanager.rssi_changed_action)) { 
        log.d(tag, "rssi changed"); 
         
        //有可能是正在获取，或者已经获取了 
        log.d(tag, " intent is " + wifimanager.rssi_changed_action); 
         
        if (iswificontected(mcontext) == wifi_connected) { 
          stoptimer(); 
          onnotifywificonnected(); 
          unregister(); 
        } else if (iswificontected(mcontext) == wifi_connect_failed) { 
          stoptimer(); 
          closewifi(); 
          onnotifywificonnectfailed(); 
          unregister(); 
        } else if (iswificontected(mcontext) == wifi_connecting) { 
           
        } 
      } 
    } 
  }; 
   
  private final int state_registring = 0x01; 
  private final int state_registered = 0x02; 
  private final int state_unregistering = 0x03; 
  private final int state_unregistered = 0x04; 
   
  private int mhaveregister = state_unregistered; 
  private synchronized void register() { 
    log.v(tag, "register() ##mhaveregister = " + mhaveregister); 
 
    if (mhaveregister == state_registring  
        || mhaveregister == state_registered) { 
      return ; 
    } 
     
    mhaveregister = state_registring; 
    myregisterreceiver(mbroadcastreceiver, new intentfilter(wifimanager.rssi_changed_action)); 
    mhaveregister = state_registered; 
     
    starttimer(); 
  } 
   
  private synchronized void unregister() { 
    log.v(tag, "unregister() ##mhaveregister = " + mhaveregister); 
     
    if (mhaveregister == state_unregistered  
        || mhaveregister == state_unregistering) { 
      return ; 
    } 
     
    mhaveregister = state_unregistering; 
    myunregisterreceiver(mbroadcastreceiver); 
    mhaveregister = state_unregistered; 
  } 
   
  private timer mtimer = null; 
  private void starttimer() { 
    if (mtimer != null) { 
      stoptimer(); 
    } 
     
    mtimer = new timer(true); 
//   mtimer.schedule(mtimertask, 0, 20 * 1000);// 20s 
    mtimer.schedule(mtimertask, 30 * 1000); 
  } 
   
  private timertask mtimertask = new timertask() { 
     
    @override 
    public void run() { 
      // todo auto-generated method stub 
      log.e(tag, "timer out!"); 
      onnotifywificonnectfailed(); 
      unregister(); 
    } 
  }; 
   
  private void stoptimer() { 
    if (mtimer != null) { 
      mtimer.cancel(); 
      mtimer = null; 
    } 
  } 
   
  @override 
  protected void finalize() { 
    try { 
      super.finalize(); 
      unregister(); 
    } catch (throwable e) { 
      // todo auto-generated catch block 
      e.printstacktrace(); 
    } 
  } 
   
  public wificonfiguration createwifiinfo(string ssid, string password, int type) { 
     
    log.v(tag, "ssid = " + ssid + "## password = " + password + "## type = " + type); 
     
    wificonfiguration config = new wificonfiguration(); 
    config.allowedauthalgorithms.clear(); 
    config.allowedgroupciphers.clear(); 
    config.allowedkeymanagement.clear(); 
    config.allowedpairwiseciphers.clear(); 
    config.allowedprotocols.clear(); 
    config.ssid = "\"" + ssid + "\""; 
 
    wificonfiguration tempconfig = this.isexsits(ssid); 
    if (tempconfig != null) { 
      mwifimanager.removenetwork(tempconfig.networkid); 
    } 
     
    // 分为三种情况：1没有密码2用wep加密3用wpa加密 
    if (type == type_no_passwd) {// wificipher_nopass 
      config.wepkeys[0] = ""; 
      config.allowedkeymanagement.set(wificonfiguration.keymgmt.none); 
      config.weptxkeyindex = 0; 
       
    } else if (type == type_wep) { // wificipher_wep  
      config.hiddenssid = true; 
      config.wepkeys[0] = "\"" + password + "\""; 
      config.allowedauthalgorithms 
          .set(wificonfiguration.authalgorithm.shared); 
      config.allowedgroupciphers.set(wificonfiguration.groupcipher.ccmp); 
      config.allowedgroupciphers.set(wificonfiguration.groupcipher.tkip); 
      config.allowedgroupciphers.set(wificonfiguration.groupcipher.wep40); 
      config.allowedgroupciphers 
          .set(wificonfiguration.groupcipher.wep104); 
      config.allowedkeymanagement.set(wificonfiguration.keymgmt.none); 
      config.weptxkeyindex = 0; 
    } else if (type == type_wpa) {  // wificipher_wpa 
      config.presharedkey = "\"" + password + "\""; 
      config.hiddenssid = true; 
      config.allowedauthalgorithms 
          .set(wificonfiguration.authalgorithm.open); 
      config.allowedgroupciphers.set(wificonfiguration.groupcipher.tkip); 
      config.allowedkeymanagement.set(wificonfiguration.keymgmt.wpa_psk); 
      config.allowedpairwiseciphers 
          .set(wificonfiguration.pairwisecipher.tkip); 
      // config.allowedprotocols.set(wificonfiguration.protocol.wpa); 
      config.allowedgroupciphers.set(wificonfiguration.groupcipher.ccmp); 
      config.allowedpairwiseciphers 
          .set(wificonfiguration.pairwisecipher.ccmp); 
      config.status = wificonfiguration.status.enabled; 
    }  
     
    return config; 
  } 
   
  public static final int wifi_connected = 0x01; 
  public static final int wifi_connect_failed = 0x02; 
  public static final int wifi_connecting = 0x03; 
  /** 
   * 判断wifi是否连接成功,不是network 
   * 
   * @param context 
   * @return 
   */ 
  public int iswificontected(context context) { 
    connectivitymanager connectivitymanager = (connectivitymanager) context 
        .getsystemservice(context.connectivity_service); 
    networkinfo wifinetworkinfo = connectivitymanager 
        .getnetworkinfo(connectivitymanager.type_wifi); 
     
    log.v(tag, "isconnectedorconnecting = " + wifinetworkinfo.isconnectedorconnecting()); 
    log.d(tag, "wifinetworkinfo.getdetailedstate() = " + wifinetworkinfo.getdetailedstate()); 
    if (wifinetworkinfo.getdetailedstate() == detailedstate.obtaining_ipaddr 
        || wifinetworkinfo.getdetailedstate() == detailedstate.connecting) { 
      return wifi_connecting; 
    } else if (wifinetworkinfo.getdetailedstate() == detailedstate.connected) { 
      return wifi_connected; 
    } else { 
      log.d(tag, "getdetailedstate() == " + wifinetworkinfo.getdetailedstate()); 
      return wifi_connect_failed; 
    } 
  } 
   
  private wificonfiguration isexsits(string ssid) { 
    list<wificonfiguration> existingconfigs = mwifimanager.getconfigurednetworks(); 
    for (wificonfiguration existingconfig : existingconfigs) { 
      if (existingconfig.ssid.equals("\"" + ssid + "\"") /*&& existingconfig.presharedkey.equals("\"" + password + "\"")*/) { 
        return existingconfig; 
      } 
    } 
    return null; 
  } 
   
 
 
  // 断开指定id的网络 
  public void disconnectwifi(int netid) { 
    mwifimanager.disablenetwork(netid); 
    mwifimanager.disconnect(); 
  } 
   
  // 检查当前wifi状态 
  public int checkstate() { 
    return mwifimanager.getwifistate(); 
  } 
 
  // 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(); 
    mwifilist = mwifimanager.getscanresults(); 
    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(); 
  } 
} 

wifiapadmin.java

package com.widget.hotspot; 
 
import java.lang.reflect.invocationtargetexception; 
import java.lang.reflect.method; 
import java.util.timer; 
import java.util.timertask; 
 
import android.content.context; 
import android.net.wifi.wificonfiguration; 
import android.net.wifi.wifimanager; 
import android.util.log; 
 
/** 
 * 创建热点 
 * 
 */ 
public class wifiapadmin { 
  public static final string tag = "wifiapadmin"; 
   
  public static void closewifiap(context context) { 
    wifimanager wifimanager = (wifimanager) context.getsystemservice(context.wifi_service);  
    closewifiap(wifimanager); 
  } 
   
  private wifimanager mwifimanager = null; 
   
  private context mcontext = null; 
  public wifiapadmin(context context) { 
    mcontext = context; 
     
    mwifimanager = (wifimanager) mcontext.getsystemservice(context.wifi_service);  
     
    closewifiap(mwifimanager); 
  } 
   
  private string mssid = ""; 
  private string mpasswd = ""; 
  public void startwifiap(string ssid, string passwd) { 
    mssid = ssid; 
    mpasswd = passwd; 
     
    if (mwifimanager.iswifienabled()) { 
      mwifimanager.setwifienabled(false); 
    }  
     
    stratwifiap(); 
     
    mytimercheck timercheck = new mytimercheck() { 
       
      @override 
      public void dotimercheckwork() { 
        // todo auto-generated method stub 
         
        if (iswifiapenabled(mwifimanager)) { 
          log.v(tag, "wifi enabled success!"); 
          this.exit(); 
        } else { 
          log.v(tag, "wifi enabled failed!"); 
        } 
      } 
 
      @override 
      public void dotimeoutwork() { 
        // todo auto-generated method stub 
        this.exit(); 
      } 
    }; 
    timercheck.start(15, 1000); 
     
  } 
 
  public void stratwifiap() { 
    method method1 = null; 
    try { 
      method1 = mwifimanager.getclass().getmethod("setwifiapenabled", 
          wificonfiguration.class, boolean.class); 
      wificonfiguration netconfig = new wificonfiguration(); 
 
      netconfig.ssid = mssid; 
      netconfig.presharedkey = mpasswd; 
 
      netconfig.allowedauthalgorithms 
          .set(wificonfiguration.authalgorithm.open); 
      netconfig.allowedprotocols.set(wificonfiguration.protocol.rsn); 
      netconfig.allowedprotocols.set(wificonfiguration.protocol.wpa); 
      netconfig.allowedkeymanagement 
          .set(wificonfiguration.keymgmt.wpa_psk); 
      netconfig.allowedpairwiseciphers 
          .set(wificonfiguration.pairwisecipher.ccmp); 
      netconfig.allowedpairwiseciphers 
          .set(wificonfiguration.pairwisecipher.tkip); 
      netconfig.allowedgroupciphers 
          .set(wificonfiguration.groupcipher.ccmp); 
      netconfig.allowedgroupciphers 
          .set(wificonfiguration.groupcipher.tkip); 
 
      method1.invoke(mwifimanager, netconfig, true); 
 
    } catch (illegalargumentexception e) { 
      // todo auto-generated catch block 
      e.printstacktrace(); 
    } catch (illegalaccessexception e) { 
      // todo auto-generated catch block 
      e.printstacktrace(); 
    } catch (invocationtargetexception e) { 
      // todo auto-generated catch block 
      e.printstacktrace(); 
    } catch (securityexception e) { 
      // todo auto-generated catch block 
      e.printstacktrace(); 
    } catch (nosuchmethodexception e) { 
      // todo auto-generated catch block 
      e.printstacktrace(); 
    } 
  } 
 
  private static void closewifiap(wifimanager wifimanager) { 
    if (iswifiapenabled(wifimanager)) { 
      try { 
        method method = wifimanager.getclass().getmethod("getwifiapconfiguration"); 
        method.setaccessible(true); 
 
        wificonfiguration config = (wificonfiguration) method.invoke(wifimanager); 
 
        method method2 = wifimanager.getclass().getmethod("setwifiapenabled", wificonfiguration.class, boolean.class); 
        method2.invoke(wifimanager, config, false); 
      } catch (nosuchmethodexception e) { 
        // todo auto-generated catch block 
        e.printstacktrace(); 
      } catch (illegalargumentexception e) { 
        // todo auto-generated catch block 
        e.printstacktrace(); 
      } catch (illegalaccessexception e) { 
        // todo auto-generated catch block 
        e.printstacktrace(); 
      } catch (invocationtargetexception e) { 
        // todo auto-generated catch block 
        e.printstacktrace(); 
      } 
    } 
  } 
 
  private static boolean iswifiapenabled(wifimanager wifimanager) { 
    try { 
      method method = wifimanager.getclass().getmethod("iswifiapenabled"); 
      method.setaccessible(true); 
      return (boolean) method.invoke(wifimanager); 
 
    } catch (nosuchmethodexception e) { 
      // todo auto-generated catch block 
      e.printstacktrace(); 
    } catch (exception e) { 
      e.printstacktrace(); 
    } 
 
    return false; 
  } 
 
} 

mytimecheck.java

package com.widget.hotspot; 
public abstract class mytimercheck { 
  private int mcount = 0; 
  private int mtimeoutcount = 1; 
  private int msleeptime = 1000; // 1s 
  private boolean mexitflag = false; 
  private thread mthread = null; 
   
  /** 
   * do not process ui work in this. 
   */ 
  public abstract void dotimercheckwork(); 
   
  public abstract void dotimeoutwork(); 
   
  public mytimercheck() { 
    mthread = new thread(new runnable() { 
       
      @override 
      public void run() { 
        // todo auto-generated method stub 
        while (!mexitflag) { 
          mcount++; 
          if (mcount < mtimeoutcount) { 
            dotimercheckwork(); 
            try { 
              mthread.sleep(msleeptime); 
            } catch (interruptedexception e) { 
              // todo auto-generated catch block 
              e.printstacktrace(); 
              exit(); 
            } 
          } else { 
            dotimeoutwork(); 
          } 
        } 
      } 
    }); 
  } 
   
  /** 
   * start 
   * @param times how many times will check? 
   * @param sleeptime ms, every check sleep time. 
   */ 
  public void start(int timeoutcount, int sleeptime) { 
    mtimeoutcount = timeoutcount; 
    msleeptime = sleeptime; 
     
    mthread.start(); 
  } 
   
  public void exit() { 
    mexitflag = true; 
  } 
   
} 

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