前言
此篇博客讲解WiFi正常功能开发与热点功能开发
权限
不管是WiFi正常功能还是WiFi热点都需要以下权限,Android5.0还需要动态权限
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
WiFi正常功能(扫描/连接/断开)
初始化WiFi管理
操作WiFi的基础类,所有的WiFi操作都需要使用这个管理类
WifiManager mWifiManager = (WifiManager)getApplicationContext().getSystemService(Context.WIFI_SERVICE);
判断WiFi状态
这个是判断设备的WiFi硬件状态,一共有已经几种设备状态:
WIFI_STATE_DISABLED WiFi已经禁用
WIFI_STATE_DISABLING 正在禁用WiFi中
WIFI_STATE_ENABLED WiFi已经启用
WIFI_STATE_ENABLING 正在启用WiFi中
WIFI_STATE_UNKNOWN 设备状态未知(或者没有WiFi硬件支持)
if (mWifiManager.getWifiState() == WifiManager.WIFI_STATE_DISABLED){ Log.e(TAG, "WiFi已经启用"); }
判断WiFi是否开启
这是官方提供的更快捷判断WiFi是否开启的方法
if (mWifiManager.isWifiEnabled()){ Log.e(TAG, "WiFi已经开启"); }else { Log.e(TAG, "WiFi已经关闭"); }
开启或者关闭WiFi
用此方法开启WiFi会有一个系统弹窗提示用户手动开启WiFi.
mWifiManager.setWifiEnabled(true); //false为关闭
搜索WiFi与获取WiFi设备列表
private void scan(){ mWifiManager.startScan(); //搜索WiFi,在这个代码的注释里有说明搜索过程是异步的 Handler handler = new Handler(); handler.postDelayed(new Runnable() { @Override public void run() { List<ScanResult> list = mWifiManager.getScanResults(); //获取WiFi列表 for (ScanResult scanResult : list){ Log.e(TAG, "=================================="); Log.e(TAG, "scan: wifi 名称="+scanResult.SSID); Log.e(TAG, "scan: wifi WiFi地址="+scanResult.BSSID); Log.e(TAG, "scan: wifi 加密方式="+scanResult.capabilities); } } },1000); }
开始搜索是一个异步的过程,你可以直接获取WiFi列表(有可能还是上次的搜索结果),也可以写个Handler等待几秒在获取WiFi列表.
注意一! mWifiManager.getScanResults() 得到的List里面的数据其实是一直会变化的! 意思是计算你获取到了这个list,在WiFi的底层代码里依然会修改/增加/删除这个list里的数据
注意二! mWifiManager.getScanResults() 得到的List里面的数据会出现重复/空名/个别值为null的问题,这是正常的.所以WiFi的难点不是连接与搜索,而是清洗数据
结果:
WifiActivity: ================================== WifiActivity: scan: wifi 名称=WETOOL_2.4G WifiActivity: scan: wifi WiFi地址=08:9b:4b:9d:25:b5 WifiActivity: scan: wifi 加密方式=[WPA2-PSK+FT/PSK-CCMP][ESS] WifiActivity: ================================== WifiActivity: scan: wifi 名称=2_5g WifiActivity: scan: wifi WiFi地址=d0:ee:07:59:64:18 WifiActivity: scan: wifi 加密方式=[WPA-PSK-CCMP][WPA2-PSK-CCMP][ESS] WifiActivity: ================================== WifiActivity: scan: wifi 名称=喵星人的WiFi WifiActivity: scan: wifi WiFi地址=6c:88:14:f4:f3:5d WifiActivity: scan: wifi 加密方式=[WPA2-PSK-CCMP][ESS]
ScanResult可以获取的信息
ScanResult是搜索到WiFi列表后获取的单个WiFi信息,里面包含了一些信息需要了解一下(注意,如果你看源码会发现有很多信息是隐藏的无法调用的.那些变量都是系统级别的API才能调用,这里只说明可以看到的信息)
CharSequence area = scanResult.venueName; //WiFi接入点的地点名称 int frequency = scanResult.frequency; //频率 long refreshTime = scanResult.timestamp; //此WiFi最新的刷新时间戳 int level = scanResult.level; //信号强度 String encryption = scanResult.capabilities;//加密方式 例如:WEP/WAP/WAP2 String address = scanResult.BSSID; //WiFi的地址 String name = scanResult.SSID; //WiFi的名称
连接指定的WIiFi网络
这段流程比较长,大致是这样的:
1.搜索WiFi,找到指定WiFi 获取名称/地址/加密方式,以及你自己知道的WiFi密码
2.创建WiFi配置信息WifiConfiguration, 添加WiFi名称,地址
3.在根据加密方式以对应的方式添加密码到WifiConfiguration
4.将WiFi配置WifiConfiguration,添加到以配置的网络列表里addNetwork(wifiConfiguration);
5.获取已经配置好的网络列表mWifiManager.getConfiguredNetworks();,找到指定WiFi,获取id
6.断开现在正在连接的WiFi,输入id启用设置好的WiFi,重新连接
注意! scanResult.BSSID 这个BSSID其实动态生成的路由地址,不可以依靠这来判断wifi的唯一性. 所以用SSID加BSSID来锁定一个WiFi是不现实的.因为有时候BSSID其实是null的.只能使用SSID来判断WiFi,遇到重名WiFi没有什么办法
public void scan(){ List<ScanResult> list = mWifiManager.getScanResults(); //获取WiFi列表 Log.e(TAG, "list 长度="+list.size()); for (ScanResult scanResult : list){ if (scanResult.SSID.equals("My_5g")){ //找到我们需要的WiFi connectionWifi(scanResult.SSID,"winteam0901", scanResult.capabilities); //连接它 } } } /** * 连接WiFi的方法 * @param ssid wifi名称 * @param password WiFi密码 * @param capabilities 加密方式 */ public void connectionWifi(String ssid, String password, String capabilities) { WifiConfiguration wifiConfiguration = new WifiConfiguration(); ssid = """ + ssid + """; //WiFi的名称配置需要加引号 password = """ + password + """; //WiFi的密码配置需要加引号 wifiConfiguration.SSID = ssid; if (capabilities.contains("WPA")) { wifiConfiguration.preSharedKey = password; } else if (capabilities.contains("WEP")) { wifiConfiguration.wepKeys[0] = password; wifiConfiguration.wepTxKeyIndex = 0; wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40); } else if (capabilities.contains("OPEN")) { wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); } mWifiManager.addNetwork(wifiConfiguration); List<WifiConfiguration> wifiConfigurationList = mWifiManager.getConfiguredNetworks(); for (WifiConfiguration item : wifiConfigurationList) { if (item.SSID == null) { continue; } if (item.SSID.equals(ssid)) { mWifiManager.disconnect(); //断开连接 mWifiManager.enableNetwork(item.networkId, true); //连接我们需要的WiFi mWifiManager.reconnect(); //重新连接 } } }
获取已经配置密码并且保存的WiFi网络列表
上面的代码里有说明获取已经配置密码的WiFi网络列表的部分代码了,就是如下代码,但是这里在强调一下.他的使用情景与信息
1.WiFi是有暂存的,以记录密码的WiFi系统会保存起来,方便某个WiFi断开后自动重新连接这个配置列表里的其他WiFi
2.所以在如果要删除某个WiFi,你必需移除这个配置列表里的这个WiFi,如果只是断开操作将可能自动重连
3.这个配置列表还能告诉用户已经保存连接过所有WiFi的,用户直接点击后重新连接这个WiFi(不需要再次输入密码)
4.你可以重新更新这个配置列表的WiFi密码
注意! 跟上面的一样 mWifiManager.getConfiguredNetworks() 得到的List里面的数据会出现重复/空名/个别值为null的问题.另外这里获取的WiFi数据是不含信号强度的.如果你需要信号强度就需要跟ScanResult数据进行对比后获取.
List<WifiConfiguration> configurationList = mWifiManager.getConfiguredNetworks();
更新指定WiFi(更换密码)
更新WiFi的方法主要是mWifiManager.updateNetwork(item); 但是请注意这个WiFi必须是已经保存配置的WiFi
/** * 更新WiFi */ public void undateWifi(String ssid, String password) { List<WifiConfiguration> wifiConfigurationList = mWifiManager.getConfiguredNetworks(); for (WifiConfiguration item : wifiConfigurationList) { if (item.SSID == null) { continue; } if (item.SSID.equals(""" + ssid + """)) { item.preSharedKey = """ + password + """; mWifiManager.disconnect(); int id = mWifiManager.updateNetwork(item); if (id == -1) { //id如果等于 -1 就说明更新失败了 return; } mWifiManager.enableNetwork(id, true); //启用连接WiFi mWifiManager.reconnect(); } } }
移除指定WiFi
注意! 这里的移除WiFi,只能移除自己的app保存的WiFi,如果是手机-设置-WiFi设置里手动添加的WiFi,你是无法移除的.
/** * 移除这个app保存的WiFi * * @param ssid */ public void removeWifi(String ssid) { mWifiManager.startScan(); List<WifiConfiguration> wifiConfigurationList = mWifiManager.getConfiguredNetworks(); for (WifiConfiguration item : wifiConfigurationList) { if (item.SSID.equals(""" + ssid + """)) { mWifiManager.disconnect(); mWifiManager.removeNetwork(item.networkId); mWifiManager.reconnect(); } } }
获取当前正在连接中的WiFi信息
public WifiInfo getConnectionInfo() { WifiInfo wifiInfo = mWifiManager.getConnectionInfo(); wifiInfo.getSSID();//WiFi名称 wifiInfo.getRssi();//信号强度 wifiInfo.getIpAddress();//ip地址 wifiInfo.getFrequency();//频率 比如2.4G（boolean is24G = frequency > 2400 && frequency < 2500;） 或者 5G （boolean is5G = frequency > 4900 && frequency < 5900;）的WiFi wifiInfo.getNetworkId();//id wifiInfo.getLinkSpeed();//网络链接速度 wifiInfo.getSupplicantState();//获取请求状态 return wifiInfo; }
这里获取的ssid 是带引号的
注意!获取正在连接中的WiFiInfo,这个数据是永远不会是空的,如果一次WiFi都没连接过那么它携带的数据会有空的,如果连接过然后又断开了,那么你在这里获取的就是之前连接的WiFi. 那么如何判断当前是否真的有连接WiFi呢?
很简单判断ip地址即可,这个地址是实时刷新的:
if (wifiInfo.getIpAddress() == 0){ Log.e(TAG, "getData: 当前未连接WiFi"); }
增加引号和移除引号的方法
/** * 移除引号 * * @param content * @return */ public String removeQuotationMarks(String content) { content = content.substring(1, content.length() - 1); return content; } /** * 添加引号 * * @param content * @return */ public String addQuotationMarks(String content) { content = """ + content + """; return content; }
格式化wifi信号值
/** * WifiInfo.MIN_RSSI = -126; * WifiInfo.MAX_RSSI = 200; * * Quality Excellent Good Fair Poor * dBm -30 ～ -61 -63 ～ -73 -75 ～ -85 -87 ～ -97 * * @param rssi * @return */ public static int formatLevel(int rssi) { if (rssi < -97){ return 0; }else if (rssi < -87){ return 1; }else if (rssi < -75){ return 2; }else if (rssi < -63){ return 3; }else { return 4; } }
将WiFi的IP地址转换成Mac地址显示
/** * 将idAddress转化成string类型的Id字符串 * * @param idString * @return */ private static String getStringId(int idString) { StringBuffer sb = new StringBuffer(); int b = (idString >> 0) & 0xff; sb.append(b + "."); b = (idString >> 8) & 0xff; sb.append(b + "."); b = (idString >> 16) & 0xff; sb.append(b + "."); b = (idString >> 24) & 0xff; sb.append(b); return sb.toString(); }
获取WiFi状态
注册广播
mIntentFilter = new IntentFilter(); mIntentFilter.addAction("android.net.wifi.STATE_CHANGE");//WiFi状态变化 mIntentFilter.addAction("android.net.wifi.WIFI_STATE_CHANGED");//WiFi开关状态 mWiFiChangeReceiver = new WiFiChangeReceiver(); registerReceiver(mWiFiChangeReceiver,mIntentFilter);
接收广播处理
class WiFiChangeReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(WifiManager.WIFI_STATE_CHANGED_ACTION)) { int switchState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);//得到WiFi开关状态值 switch (switchState) { case WifiManager.WIFI_STATE_DISABLED://WiFi已关闭 WiFIStateData data1 = new WiFIStateData(); data1.time = mDf.format(System.currentTimeMillis()); data1.state = "WiFi关闭"; mDao.insert(data1); EventBus.getDefault().post(msgData); Log.e(TAG, "WiFi关闭"); break; case WifiManager.WIFI_STATE_DISABLING://WiFi关闭中 Log.e(TAG, "WiFi关闭中"); break; case WifiManager.WIFI_STATE_ENABLED://WiFi已开启 WiFIStateData data2 = new WiFIStateData(); data2.time = mDf.format(System.currentTimeMillis()); data2.state = "WiFi开启"; mDao.insert(data2); EventBus.getDefault().post(msgData); Log.e(TAG, "WiFi开启"); break; case WifiManager.WIFI_STATE_ENABLING://WiFi开启中 Log.e(TAG, "WiFi开启中"); break; case WifiManager.WIFI_STATE_UNKNOWN://WiFi状态未知 WiFIStateData data3 = new WiFIStateData(); data3.time = mDf.format(System.currentTimeMillis()); data3.state = "WiFi状态未知"; mDao.insert(data3); EventBus.getDefault().post(msgData); Log.e(TAG, "WiFi状态未知"); break; default: break; } } if (intent.getAction().equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)){ //网络状态改变行为 Parcelable parcelableExtra = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);//得到信息包 if (parcelableExtra != null){、蓝牙—— NetworkInfo networkInfo = (NetworkInfo)parcelableExtra;//得到网络信息 NetworkInfo.DetailedState detailedState = networkInfo.getDetailedState(); switch (detailedState){ case CONNECTED: mDisconnectState = true; WiFIStateData data4 = new WiFIStateData(); data4.time = mDf.format(System.currentTimeMillis()); data4.state = "已经连接"; mDao.insert(data4); EventBus.getDefault().post(msgData); Log.e(TAG, "已经连接"); break; case DISCONNECTED: if (mDisconnectState){ mDisconnectState = false; WiFIStateData data5 = new WiFIStateData(); data5.time = mDf.format(System.currentTimeMillis()); data5.state = "已经断开"; mDao.insert(data5); EventBus.getDefault().post(msgData); Log.e(TAG, "已经断开"); } break; case IDLE: WiFIStateData data6 = new WiFIStateData(); data6.time = mDf.format(System.currentTimeMillis()); data6.state = "空闲中"; mDao.insert(data6); EventBus.getDefault().post(msgData); Log.e(TAG, "空闲中"); break; case AUTHENTICATING: WiFIStateData data7 = new WiFIStateData(); data7.time = mDf.format(System.currentTimeMillis()); data7.state = "认证中"; mDao.insert(data7); EventBus.getDefault().post(msgData); Log.e(TAG, "认证中"); break; case BLOCKED: WiFIStateData data8 = new WiFIStateData(); data8.time = mDf.format(System.currentTimeMillis()); data8.state = "认证失败"; mDao.insert(data8); EventBus.getDefault().post(msgData); Log.e(TAG, "认证失败"); break; case CAPTIVE_PORTAL_CHECK: WiFIStateData data9 = new WiFIStateData(); data9.time = mDf.format(System.currentTimeMillis()); data9.state = "连接检查"; mDao.insert(data9); EventBus.getDefault().post(msgData); Log.e(TAG, "连接检查"); break; default: break; } } } } }
WiFi设备信息的数据清洗
上面的WiFi内容都是WiFi基本玩法，下面才是玩自定义WiFi的难点。
Android提供的WiFi框架会因为WiFi设备原因，显示很多同名WiFi。并且getConfiguredNetworks 与 getConnectionInfo 与 getScanResults 三种数据获取后都有相同的数据，数据比较混乱重复，甚至还有空名称的WiFi。所以，我们需要清洗它，这是自定义WiFi功能的难点。
1.创建一个清洗后数据保存的bean
package com.zh.zwifidemo.wifi;
import java.util.List;
public class WifiDataBean {
private ConnectionWifi connectionWifi; //当前正在连接的WiFi
private List<ConfigWifi> configWifiList;//已经配置过的WiFi
private List<OtherWifi> otherWifiList; //搜索到的其他WiFi
public ConnectionWifi getConnectionWifi() {
return connectionWifi;
}
public void setConnectionWifi(ConnectionWifi connectionWifi) {
this.connectionWifi = connectionWifi;
}
public List<ConfigWifi> getConfigWifiList() {
return configWifiList;
}
public void setConfigWifiList(List<ConfigWifi> configWifiList) {
this.configWifiList = configWifiList;
}
public List<OtherWifi> getOtherWifiList() {
return otherWifiList;
}
public void setOtherWifiList(List<OtherWifi> otherWifiList) {
this.otherWifiList = otherWifiList;
}
public class ConnectionWifi{
private String ssid;
private Integer level; //信号强度
private Integer ipAddress;
private Integer frequency;//频率
public String getSsid() {
return ssid;
}
public void setSsid(String ssid) {
this.ssid = ssid;
}
public Integer getLevel() {
return level;
}
public void setLevel(Integer level) {
this.level = level;
}
public Integer getIpAddress() {
return ipAddress;
}
public void setIpAddress(Integer ipAddress) {
this.ipAddress = ipAddress;
}
public Integer getFrequency() {
return frequency;
}
public void setFrequency(Integer frequency) {
this.frequency = frequency;
}
}
public class ConfigWifi{
private String ssid;
private Integer level; //信号强度
/*
public static final int CURRENT = 0; 已连接
public static final int DISABLED = 1; 停用,错误密码
public static final int ENABLED = 2; 已保存,未连接
*/
private Integer state;
private String capabilities;
public String getSsid() {
return ssid;
}
public void setSsid(String ssid) {
this.ssid = ssid;
}
public Integer getLevel() {
return level;
}
public void setLevel(Integer level) {
this.level = level;
}
public Integer getState() {
return state;
}
public void setState(Integer state) {
this.state = state;
}
public String getCapabilities() {
return capabilities;
}
public void setCapabilities(String capabilities) {
this.capabilities = capabilities;
}
}
public class OtherWifi{
private String ssid;
private Integer level; //信号强度
private String capabilities;//安全形式
public String getSsid() {
return ssid;
}
public void setSsid(String ssid) {
this.ssid = ssid;
}
public Integer getLevel() {
return level;
}
public void setLevel(Integer level) {
this.level = level;
}
public String getCapabilities() {
return capabilities;
}
public void setCapabilities(String capabilities) {
this.capabilities = capabilities;
}
}
}
2.清洗将所有获取的WiFi数据清洗，最后返回我们需要的bean数据
public WifiDataBean getWifiBean() { WifiDataBean wifiDataBean = new WifiDataBean(); WifiInfo wifiInfo = mWifiManager.getConnectionInfo(); List<ScanResult> scanResultList = new ArrayList<>(); List<WifiConfiguration> configurationList = new ArrayList<>(); scanResultList.addAll(mWifiManager.getScanResults()); configurationList.addAll(mWifiManager.getConfiguredNetworks()); List<WifiDataBean.ConfigWifi> configWifiList = new ArrayList<>(); List<WifiDataBean.OtherWifi> otherWifiList = new ArrayList<>(); /* 处理当前正在连接中的WiFi */ if (wifiInfo.getIpAddress() == 0) { wifiDataBean.setConnectionWifi(null); } else { WifiDataBean.ConnectionWifi connectionWifi = wifiDataBean.new ConnectionWifi(); connectionWifi.setSsid(wifiInfo.getSSID()); connectionWifi.setLevel(wifiInfo.getRssi()); connectionWifi.setIpAddress(wifiInfo.getIpAddress()); connectionWifi.setFrequency(wifiInfo.getFrequency()); wifiDataBean.setConnectionWifi(connectionWifi); } /* 处理已经配置过的WiFi */ if (configurationList.isEmpty()) { wifiDataBean.setConfigWifiList(configWifiList); } else { for (int i = 0; i < configurationList.size(); i++) { //除去null的WiFi WifiConfiguration configuration = configurationList.get(i); if (configuration.SSID == null) { configurationList.remove(configuration); } } if (wifiDataBean.getConnectionWifi() != null) { for (int i = 0; i < configurationList.size(); i++) { //去除正在连接的WiFi item WifiConfiguration configuration = configurationList.get(i); if (configuration.SSID.equals(wifiDataBean.getConnectionWifi().getSsid())) { configurationList.remove(configuration); } } } for (int i = 0; i < configurationList.size(); i++) { //除去重复的WiFi WifiConfiguration configuration = configurationList.get(i); for (int j = i + 1; j < configWifiList.size(); j++) { WifiConfiguration item = configurationList.get(j); if (configuration.SSID.equals(item.SSID)) { configurationList.remove(item); } } } for (int i = 0; i < configurationList.size(); i++) { //添加配置过的WiFi数据 WifiConfiguration configuration = configurationList.get(i); WifiDataBean.ConfigWifi configWifi = wifiDataBean.new ConfigWifi(); configWifi.setSsid(configuration.SSID); configWifi.setState(configuration.status); for (int j = 0; j < scanResultList.size(); j++) { ScanResult scanResult = scanResultList.get(j); if (removeQuotationMarks(configuration.SSID).equals(scanResult.SSID)) { configWifi.setLevel(scanResult.level); } } if (configWifi.getLevel() == null) { configWifi.setLevel(-98); } if (configuration.preSharedKey != null && !configuration.preSharedKey.equals("")) { configWifi.setCapabilities("WPA"); } else if (configuration.wepKeys[0] != null && !configuration.wepKeys[0].equals("")) { configWifi.setCapabilities("WEP"); } else { configWifi.setCapabilities("OPEN"); } configWifiList.add(configWifi); } wifiDataBean.setConfigWifiList(configWifiList); } /* 设置其他WiFi */ if (scanResultList.isEmpty()) { wifiDataBean.setOtherWifiList(otherWifiList); } else { for (int i = 0; i < scanResultList.size(); i++) { //去除null ScanResult scanResult = scanResultList.get(i); if (scanResult.SSID == null) { scanResultList.remove(scanResult); } } if (wifiDataBean.getConnectionWifi() != null){ for (int i = 0; i < scanResultList.size(); i++) { //去除已连接的 ScanResult scanResult = scanResultList.get(i); if (scanResult.SSID.equals(removeQuotationMarks(wifiDataBean.getConnectionWifi().getSsid()))) { scanResultList.remove(scanResult); } } } for (int i = 0; i < scanResultList.size(); i++) { //去除已配置的 ScanResult scanResult = scanResultList.get(i); for (int j = 0; j < configWifiList.size(); j++) { WifiDataBean.ConfigWifi configWifi = configWifiList.get(j); if (removeQuotationMarks(configWifi.getSsid()).equals(scanResult.SSID)) { scanResultList.remove(scanResult); } } } for (int i = 0; i < scanResultList.size(); i++) { //去除重复的 ScanResult scanResult = scanResultList.get(i); for (int j = i + 1; j < scanResultList.size(); j++) { ScanResult item = scanResultList.get(j); if (scanResult.SSID.equals(item.SSID)) { scanResultList.remove(item); } } } for (int i = 0; i < scanResultList.size(); i++) { ScanResult scanResult = scanResultList.get(i); WifiDataBean.OtherWifi otherWifi = wifiDataBean.new OtherWifi(); otherWifi.setSsid(scanResult.SSID); otherWifi.setLevel(scanResult.level); otherWifi.setCapabilities(scanResult.capabilities); otherWifiList.add(otherWifi); } wifiDataBean.setOtherWifiList(otherWifiList); } return wifiDataBean; }
WIFI热点
注意WiFi热点除了WiFi权限以外，如果要创建wifi热点还需要一个系统权限 android.permission.WRITE_SETTINGS。
但是这种系统权限在6.0版本后无法直接静态或者动态授权（十分无语）。所以在下面的代码中setPermissions方法就是添加设置权限的办法。
/* content:创建WiFi热点class time:2018-7-23 11：23 build: */ public class WiFiAP { private static WiFiAP mWiFiAP; private static WifiManager mWifManager; private WiFiAP(){} public static WiFiAP getI(){ if (mWiFiAP == null){ mWiFiAP = new WiFiAP(); } return mWiFiAP; } /** * 手动得到系统权限的方法，提供给外部启动系统权限界面，以实现手动添加系统权限 * @param context 外部activity的上下文 */ public void setPermissions(Context context){ Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS); intent.setData(Uri.parse("package:" + context.getPackageName())); context.startActivity(intent); } /** * 打开热点并且创建WiFi热点的方法 * @param context 外部上下文 * @param ssid 要创建WiFi热点的账号名称 * @param password 要创建WiFi热点的密码 * 注意,此方法直接使用WPA2_PSK 的安全策略创建WiFi热点,低版本的Android系统如果需要使用请切换。 */ @SuppressLint("MissingPermission") public void openWiFiAP(Context context, String ssid, String password){ mWifManager = (WifiManager)context.getApplicationContext().getSystemService(Context.WIFI_SERVICE); if (mWifManager.isWifiEnabled()) { //如果wifi处于打开状态，则关闭wifi, mWifManager.setWifiEnabled(false); } WifiConfiguration config = new WifiConfiguration(); config.SSID = ssid; config.preSharedKey = password; config.hiddenSSID = false;//是否隐藏热点true=隐藏 config.allowedAuthAlgorithms .set(WifiConfiguration.AuthAlgorithm.OPEN);//开放系统认证 config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP); int indexOfWPA2_PSK = 4; //从WifiConfiguration.KeyMgmt数组中查找WPA2_PSK的值 for (int i = 0; i < WifiConfiguration.KeyMgmt.strings.length; i++) { if(WifiConfiguration.KeyMgmt.strings[i].equals("WPA2_PSK")) { indexOfWPA2_PSK = i; break; } } //WifiConfiguration.KeyMgmt.WPA_PSK config.allowedKeyManagement.set(indexOfWPA2_PSK); config.allowedPairwiseCiphers .set(WifiConfiguration.PairwiseCipher.TKIP); config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP); config.allowedPairwiseCiphers .set(WifiConfiguration.PairwiseCipher.CCMP); config.status = WifiConfiguration.Status.ENABLED; //通过反射调用设置热点 try { Method method = mWifManager.getClass().getMethod( "setWifiApEnabled", WifiConfiguration.class, Boolean.TYPE); boolean enable = (Boolean) method.invoke(mWifManager, config, true); if (enable) { Log.e("WiFiAP", "热点已开启 SSID:" + ssid + " Password:"+password); } else { Log.e("WiFiAP", "创建热点失败"); } } catch (Exception e) { e.printStackTrace(); Log.e("WiFiAP", "创建热点失败"+e); } } /** * 关闭WiFi热点的方法 * @param context 外部activity的上下文 */ public void closeWiFiAP(Context context){ mWifManager = (WifiManager)context.getApplicationContext().getSystemService(Context.WIFI_SERVICE); if( mWifManager == null){ Log.e("closeWiFiAP", "Error: mWifManager is null"); return; } try { Method method = mWifManager.getClass().getMethod("getWifiApConfiguration"); method.setAccessible(true); WifiConfiguration config = (WifiConfiguration) method.invoke(mWifManager); Method method2 = mWifManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class); method2.invoke(mWifManager, config, false); //mText.setText("wifi热点关闭"); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } }
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