android 打开ap热点

在android上，实现打开ap热点功能，记录一下过程中遇到的问题；

package com.test;

import android.content.Context;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;

import java.lang.reflect.Method;

public class WifiUtils {

    private WifiManager wifiManager = (WifiManager) ContextUtils.getApplicationContext().getSystemService(Context.WIFI_SERVICE);

    private boolean isWifiEnabled() {
        return wifiManager.isWifiEnabled();
    }

    /**
     * 是否打开共享热点
     */
    private boolean isWifiApEnabled() {
        try {
            Method method = wifiManager.getClass().getMethod("isWifiApEnabled");
            method.setAccessible(true);
            return (Boolean) method.invoke(wifiManager);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

    /**
     * 是否打开指定共享热点：名称和密码
     */
    private boolean isWifiApEnabled(String ssid, String password) {
        boolean ret = isWifiApEnabled();
        if (!ret) {
            return false;
        }

        WifiConfiguration wifiConfig = getWifiApConfiguration();
        String apName = wifiConfig.SSID;
        String apPassword = wifiConfig.preSharedKey;
        // TODO 可能要注意引号等特殊字符
        return ssid.equals(apName) && password.equals(apPassword);
    }

    /**
     * 获取AP热点配置信息
     */
    private WifiConfiguration getWifiApConfiguration() {
        try {
            Method method = wifiManager.getClass().getMethod("getWifiApConfiguration");
            method.setAccessible(true);
            return (WifiConfiguration) method.invoke(wifiManager);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    private WifiConfiguration createWifiApConfiguration(String ssid, String password) {
        WifiConfiguration wifiConfig = new WifiConfiguration();
        wifiConfig.SSID = ssid;// 热点名称
        wifiConfig.preSharedKey = password;// 热点密码
        wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
        /**
         * WPA2_PSK=4，比WPA安全性更高
         * 在android 4.4 上设置，无效：Invalid WifiConfiguration
         * 在android 6   上设置，有效
         */
        // wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA2_PSK);
        wifiConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
        wifiConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
        wifiConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
        return wifiConfig;
    }

    private boolean setWifiApConfiguration(WifiConfiguration wifiConfig) {
        try {
            Method method = wifiManager.getClass().getMethod("setWifiApConfiguration", WifiConfiguration.class);
            return (Boolean) method.invoke(wifiManager, wifiConfig);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

    private boolean setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) {
        try {
            // TODO WifiManager.setWifiApEnabled()已经被废弃；在android 7以上，需要替换为ConnectivityManager.startTethering()
            Method method = wifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, Boolean.TYPE);
            return (Boolean) method.invoke(wifiManager, wifiConfig, enabled);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

    /**
     * 打开热点
     */
    public void openAp(String apSsid, String apPassword) {
        if (isWifiApEnabled(apSsid, apPassword)) {
            // 1.指定ap已经打开，名称和密码一致
            return;
        } else {
            // 2.指定ap没有打开
            // 2.1.关闭热点
            if (isWifiEnabled()) {
                wifiManager.setWifiEnabled(false);
            }

            // 【注意：如果已经打开ap热点，名称和密码不一致，则需要先关闭AP热点，重新设置AP配置，然后再次打开AP热点】
            // 2.2.关闭ap热点
            WifiConfiguration wifiConfig = createWifiApConfiguration(apSsid, apPassword);
            if (isWifiApEnabled()) {
                setWifiApEnabled(wifiConfig, false);
            }

            // 2.3.重新设置ap配置
            setWifiApConfiguration(wifiConfig);

            // 2.4.打开ap热点
            setWifiApEnabled(wifiConfig, true);
        }
    }

    public void closeAp(String apSsid, String apPassword) {
        // TODO
        WifiConfiguration wifiConfig = createWifiApConfiguration(apSsid, apPassword);
        setWifiApEnabled(wifiConfig, false);
    }

    public void test() {
        String apSsid = "test";
        String apPassword = "12345678";
        openAp(apSsid, apPassword);
        closeAp(apSsid, apPassword);
    }

}

参考：

系统setting，Wifi模块WifiStateMachine.java

https://blog.csdn.net/bukker/article/details/78649504