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) " : mWifiInfo.getMacAddress(); } // 得到接入点的BSSID public String getBSSID() { return (mWifiInfo == 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) " : 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; } }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持查字典教程网。