android连接wifi代码

package com.pingyijinren.common.util.network;import java.util.ArrayList;import java.util.Collection;import java.util.List;import java.util.Queue;import com.pingyijinren.guider.Constants;import com.pingyijinren.guider.GuideApplication;import android.content.Context;import android.net.wifi.ScanResult;import android.net.wifi.SupplicantState;import android.net.wifi.WifiConfiguration;import android.net.wifi.WifiInfo;import android.net.wifi.WifiManager;import android.net.wifi.WifiManager.ActionListener;import android.os.AsyncTask;import android.text.TextUtils;import android.util.ArrayMap;import android.util.Log;/**本地的wifi工具类<br> * 调用步骤<br> * 1 startScan() * 2 getLocalScanResults() * 3 connect() *  * 如果连接失败 * 4 disconnect() *  *  * @author WenYF * */public class WifiTool {private static final String TAG = "WifiTool";private WifiManager nWifiManager;private List<ScanResult> nWifiScanList;private ArrayList<LocalScanResult> nLocalScanResults;private Collection<WifiListener> nWifiListeners;public void addScanStateListener(WifiListener listener) {nWifiListeners.add(listener);}public void removeScanStateListener(WifiListener listener) {nWifiListeners.remove(listener);}private AsyncTask<String, Integer, String> nScanTask;private boolean nIsDestory;private boolean nIsStopScan;private boolean nIsStopConnect;public WifiTool(Context context) {nIsStopConnect = true;nIsDestory = false;nIsStopScan = true;nWifiListeners = new ArrayList<WifiTool.WifiListener>();nLocalScanResults = new ArrayList<LocalScanResult>();nWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);nWifiScanList = null;}/** * 注销工具 */public void destory() {stopScan();nIsDestory = true;nLocalScanResults.clear();nWifiListeners.clear();}/** * 关闭WIFI */public void closeWifi() {if (nWifiManager.isWifiEnabled()) {nWifiManager.setWifiEnabled(false);}}/** * 开始wifi扫描  */public void startScan() {nScanTask = new AsyncTask<String, Integer, String>() {@Overrideprotected String doInBackground(String... params) {int sleepTime = 2000;while (!nIsDestory && !nIsStopScan) {if (!isEnable()) {enableWifi(true);}publishProgress(0);// 检索scanWifi();nLocalScanResults.clear();// 得到本地的resultsArrayMap<String, LocalScanResult> nTmpLocalScanResults = new ArrayMap<String, LocalScanResult>();if (nWifiScanList != null && nWifiScanList.size() > 0) {for (ScanResult result : nWifiScanList) {LocalScanResult lsr = new LocalScanResult(result);nTmpLocalScanResults.put(result.SSID , lsr);}sleepTime = Constants.WIFI_SCAN_EXPIRE;}// 得到正在连接的wifi信息WifiInfo wifiInfo = nWifiManager.getConnectionInfo();if (wifiInfo != null) {Log.w(TAG, "wifi info = " + wifiInfo.toString());String ssid = wifiInfo.getSSID().replaceAll("\"", "");if (!TextUtils.isEmpty(ssid) && wifiInfo.getSupplicantState() == SupplicantState.COMPLETED) {LocalScanResult lsr = nTmpLocalScanResults.get(ssid);Log.w(TAG, "lsr = " + lsr);if (lsr != null) {lsr.setConnect(true);// 这里把连接上的放第一个nLocalScanResults.add(lsr);nTmpLocalScanResults.remove(ssid);}}}// 这里对nTmpLocalScanResults进行信号排序for (LocalScanResult result : sortResults(nTmpLocalScanResults)) {nLocalScanResults.add(result);}// 打印结果for (LocalScanResult result : nLocalScanResults) {Log.d(TAG, result.toString());}// 通知完成了一次检索publishProgress(1);if (sleepTime > Constants.WIFI_SCAN_EXPIRE) {sleepTime = Constants.WIFI_SCAN_EXPIRE;}try {Thread.sleep(sleepTime);} catch (InterruptedException e) {e.printStackTrace();}}return null;}@Overrideprotected void onProgressUpdate(Integer... values) {super.onProgressUpdate(values);if (nWifiListeners == null) {return;}if (values[0] == 0) {for (WifiListener listenr : nWifiListeners) {listenr.onScanStart();}} else {for (WifiListener listenr : nWifiListeners) {listenr.onScanFinish();}}}};nIsStopScan = false;nScanTask.execute();}/** * 关闭扫描wifi */public void stopScan() {nIsStopScan = true;if (nScanTask != null) {nScanTask.cancel(true);}}private void scanWifi() {boolean scan = nWifiManager.startScan();Log.i(TAG, "startScan result:" + scan);nWifiScanList = nWifiManager.getScanResults();if (nWifiScanList != null) {Log.i(TAG, "startScan result:" + nWifiScanList.size());for (int i = 0; i < nWifiScanList.size(); i++) {ScanResult result = nWifiScanList.get(i);Log.i(TAG, "startScan result[" + i + "]" + result.SSID + ","+ result.BSSID);}Log.i(TAG, "startScan result end.");} else {Log.i(TAG, "startScan result is null.");}}/**连接一个扫描到的wifi，结果通过通知回调 * @param result result * @param password 连接密码，如果wifi不需要密码，这个参数会被忽略掉 * @param timeout 超时 */public void connect(LocalScanResult result, String password, int timeout) {// 如果result不全，那么通知连接失败if (result == null || result.getResult() == null) {for (WifiListener listener : nWifiListeners) {listener.onConnectFinish(result, true);}}// 创建wifi的连接配置WifiConfiguration config = createWifiConfiguration(result.getResult().SSID, password, result.getPasswordType());// 开始连接connect(result, config, timeout);}/** * @param result result * @param config 连接配置 * @param timeout 超时 */private void connect(LocalScanResult result, final WifiConfiguration config, int timeout) {int networkId = nWifiManager.addNetwork(config);Log.w(TAG, "networkID = " + networkId);if (networkId < 0) {for (WifiListener listener : nWifiListeners) {listener.onConnectFinish(result, false);}} else {connect(result, networkId, config, timeout, true);}}/** * @param result result * @param networkId 一个由wifiservice生成的连接id * @param config 配置 * @param timeout 超时 * @param otherStop 关闭其他的wifi */private void connect(final LocalScanResult result, final int networkId, final WifiConfiguration config, final int timeout, final boolean otherStop) {nIsStopConnect = false;// 主线程通知开始连接wifiGuideApplication.getHandler().post(new Runnable() {@Overridepublic void run() {for (WifiListener listener : nWifiListeners) {listener.onConnectStart(result);}}});// 通过调用隐藏代码来连接wifi设备nWifiManager.connect(networkId, new ActionListener() {@Overridepublic void onSuccess() {// 没有接口去监听连接的状态// 循环去获取wifi的连接状态 int timeCount = 0;boolean isConnect = isConnect(result.getResult().SSID);// 如果连接的SSID相同，并且已经连上了while (!isConnect && timeCount < timeout && !nIsStopConnect) {isConnect = isConnect(result.getResult().SSID);try {Thread.sleep(1000);timeCount += 1000;} catch (InterruptedException e) {e.printStackTrace();}}if (nIsStopConnect) {return;}if (!isConnect) {GuideApplication.getHandler().post(new Runnable() {@Overridepublic void run() {for (WifiListener listener : nWifiListeners) {listener.onConnectFinish(result, false);}}});} else {//Log.w(TAG, "enable ret = " + nWifiManager.enableNetwork(networkId, true));GuideApplication.getHandler().post(new Runnable() {@Overridepublic void run() {for (WifiListener listener : nWifiListeners) {listener.onConnectFinish(result, true);}}});}}@Overridepublic void onFailure(int arg0) {Log.w(TAG, "onFailure code = " + arg0);GuideApplication.getHandler().post(new Runnable() {@Overridepublic void run() {for (WifiListener listener : nWifiListeners) {listener.onConnectFinish(result, false);}}});}});}/** * 断开正在进行的连接 */public void stopConnect() {nIsStopConnect = true;WifiInfo info = nWifiManager.getConnectionInfo();if (info != null && info.getSSID() != null) {if (info.getNetworkId() >= 0) {nWifiManager.disableNetwork(info.getNetworkId());}nWifiManager.disconnect();}}/**创建一个wifi连接配置 * @param SSID ssid 没有引号 * @param password 密码 * @param type 类型 1 不要密码， 2 要密码， 3要密码 {@link LocalScanResult#getPasswordType()} * @return  */private WifiConfiguration createWifiConfiguration(String SSID, String password, int type) {Log.i(TAG, "SSID:" + SSID + ",password:" + password);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.getExistWifiConfiguration(SSID);if (tempConfig != null) {nWifiManager.removeNetwork(tempConfig.networkId);} else {Log.i(TAG, "IsExsits is null.");}// WIFICIPHER_NOPASSif (type == 1) {Log.i(TAG, "Type =1.");// 不把这个注释掉，不要密码的wifi返回-1id//config.wepKeys[0] = "";config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);config.wepTxKeyIndex = 0;}// WIFICIPHER_WEPif (type == 2) {Log.i(TAG, "Type =2.");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;}// WIFICIPHER_WPAif (type == 3) {Log.i(TAG, "Type =3.");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;}/** 得到wifi名为ssid的配置 * @param SSID * @return */private WifiConfiguration getExistWifiConfiguration(String SSID) { List<WifiConfiguration> existingConfigs = nWifiManager.getConfiguredNetworks();for (WifiConfiguration existingConfig : existingConfigs) {if (existingConfig.SSID.equals("\"" + SSID + "\"")) {return existingConfig;}}return null;}/** * @return wifi是否打开 */public boolean isEnable() {return nWifiManager.isWifiEnabled();}/**wifi开关 * @param enable 是否打开  * @return 操作成功返回true */public boolean enableWifi(boolean enable) {return nWifiManager.setWifiEnabled(enable);}/**这个ssid的wifi是否已经连上 * @param ssid  不用加引号 * @return */public boolean isConnect(String ssid) {WifiInfo info = nWifiManager.getConnectionInfo();Log.w(TAG, "wifi info = " + info);if (info != null && info.getSSID().equals("\"" + ssid + "\"")&& info.getSupplicantState() == SupplicantState.COMPLETED) {return true;} else {return false;}}/**得到本地封装的wifi list * @return */public ArrayList<LocalScanResult> getLocalScanResults() {return new ArrayList<LocalScanResult>(nLocalScanResults);}/**对arrayMaps进行排序 * @param arrayMaps * @return */private ArrayList<LocalScanResult> sortResults(ArrayMap<String, LocalScanResult> arrayMaps) {ArrayList<LocalScanResult> list = new ArrayList<LocalScanResult>();for (int i = 0; i < arrayMaps.size() - 1; i++) {for(int j = i + 1; j < arrayMaps.size(); j++) {LocalScanResult iValue = arrayMaps.valueAt(i);LocalScanResult jValue = arrayMaps.valueAt(j);if (jValue.getSingnal() > iValue.getSingnal()) {arrayMaps.setValueAt(i, jValue);arrayMaps.setValueAt(j, iValue);}}list.add(arrayMaps.valueAt(i));}return list;}/**动作监听<br> * TODO 如果有必要得到正在连接的状态（如握手，验证，授权等）。 * {@link WifiTool#connect(LocalScanResult, int, WifiConfiguration, int, boolean)} * 可以来完成这样的监听 * @author WenYF * */public interface WifiListener {public void onScanStart();public void onScanFinish();public void onConnectStart(LocalScanResult conf);public void onConnectFinish(LocalScanResult conf, boolean isSuccess);}public class LocalScanResult {private boolean isConnect;private ScanResult result;public LocalScanResult(ScanResult result) {isConnect = false;this.result = result;}public void setConnect(boolean isConnect) {this.isConnect = isConnect;}public boolean isConnect() {return isConnect;}public ScanResult getResult() {return result;}public int getPasswordType() {if (result == null) {Log.i("LocalScanResult", "result == null");return 1;}if (result.capabilities.contains("WEP")) {return 2;} else if (result.capabilities.contains("WPA")) {return 3;} else {return 1;}}public int getSingnal() {int signal = WifiManager.calculateSignalLevel(result.level, 4);return  signal;}@Overridepublic String toString() {return "LocalScanResult [isConnect=" + isConnect + ", result=" + result+ ", signal=" + getSingnal() + "]";}}}

这里你需要处理3个错误

1 设置scan时间

2 设置handler

3 通过反射调用WifiManager的conenct函数

（博主用的是系统编出来的jar，不需要用反射 ）