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;
 }

}