Android 通过代码设置、打开wifi热点及热点连接的实现代码

package com.tel.lajoin.wifi.hotspot; 
import java.lang.reflect.Method; 
import android.app.Activity; 
import android.content.Context; 
import android.net.wifi.WifiConfiguration; 
import android.net.wifi.WifiManager; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
public class HotspotActivity extends Activity { 
 private WifiManager wifiManager; 
 private Button open; 
 private boolean flag=false; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  // TODO Auto-generated method stub 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
  //获取wifi管理服务 
  wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 
  open=(Button)findViewById(R.id.open_hotspot); 
  //通过按钮事件设置热点 
  open.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View v) { 
    //如果是打开状态就关闭，如果是关闭就打开 
    flag=!flag; 
    setWifiApEnabled(flag); 
   } 
  }); 
 } 
 // wifi热点开关 
 public boolean setWifiApEnabled(boolean enabled) { 
  if (enabled) { // disable WiFi in any case 
   //wifi和热点不能同时打开，所以打开热点的时候需要关闭wifi 
   wifiManager.setWifiEnabled(false); 
  } 
  try { 
   //热点的配置类 
   WifiConfiguration apConfig = new WifiConfiguration(); 
   //配置热点的名称(可以在名字后面加点随机数什么的) 
   apConfig.SSID = "YRCCONNECTION"; 
   //配置热点的密码 
   apConfig.preSharedKey="12122112"; 
    //通过反射调用设置热点 
   Method method = wifiManager.getClass().getMethod( 
     "setWifiApEnabled", WifiConfiguration.class, Boolean.TYPE); 
   //返回热点打开状态 
   return (Boolean) method.invoke(wifiManager, apConfig, enabled); 
  } catch (Exception e) { 
   return false; 
  } 
 } 
} 

package com.tel.lajoin.wifiscan; 
import java.util.ArrayList; 
import java.util.List; 
import android.app.Activity; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.net.wifi.ScanResult; 
import android.net.wifi.WifiConfiguration; 
import android.net.wifi.WifiManager; 
import android.os.Bundle; 
public class MainActivity extends Activity { 
  private List<ScanResult> wifiList; 
  private WifiManager wifiManager; 
  private List<String> passableHotsPot; 
  private WifiReceiver wifiReceiver; 
  private boolean isConnected=false; 
  private Button connect; 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    init(); 
  } 
  /* 初始化参数 */ 
  public void init() { 
    setContentView(R.layout.main); 
    connect=(Button)findViewById(R.id.connect); 
    wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 
    wifiReceiver = new WifiReceiver(); 
    //通过按钮事件搜索热点 
    connect.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
        wifiManager.startScan(); 
      } 
    });    
  } 
  /* 监听热点变化 */ 
  private final class WifiReceiver extends BroadcastReceiver { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
      wifiList = wifiManager.getScanResults(); 
      if (wifiList == null || wifiList.size() == 0 || isConnected) 
        return; 
      onReceiveNewNetworks(wifiList); 
    } 
  } 
  /*当搜索到新的wifi热点时判断该热点是否符合规格*/ 
  public void onReceiveNewNetworks(List<ScanResult> wifiList){ 
    passableHotsPot=new ArrayList<String>(); 
    for(ScanResult result:wifiList){ 
      System.out.println(result.SSID); 
      if((result.SSID).contains("YRCCONNECTION")) 
        passableHotsPot.add(result.SSID); 
    } 
    synchronized (this) { 
      connectToHotpot(); 
    } 
  } 
  /*连接到热点*/ 
  public void connectToHotpot(){ 
    if(passableHotsPot==null || passableHotsPot.size()==0) 
      return; 
    WifiConfiguration wifiConfig=this.setWifiParams(passableHotsPot.get(0)); 
    int wcgID = wifiManager.addNetwork(wifiConfig); 
    boolean flag=wifiManager.enableNetwork(wcgID, true); 
    isConnected=flag; 
    System.out.println("connect success? "+flag); 
  } 
  /*设置要连接的热点的参数*/ 
  public WifiConfiguration setWifiParams(String ssid){ 
    WifiConfiguration apConfig=new WifiConfiguration(); 
    apConfig.SSID="\""+ssid+"\""; 
    apConfig.preSharedKey="\"12122112\""; 
    apConfig.hiddenSSID = true; 
    apConfig.status = WifiConfiguration.Status.ENABLED; 
    apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP); 
    apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP); 
    apConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK); 
    apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP); 
    apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP); 
    apConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN); 
    return apConfig; 
  } 
  @Override 
  protected void onDestroy() { 
    super.onDestroy(); 
    /*销毁时注销广播*/ 
    unregisterReceiver(wifiReceiver); 
  } 
}