获取安卓设备MAC地址工具类

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获取安卓设备的MAC地址需要使用WifiManager，以下是一个获取MAC地址的工具类：   ``` import android.annotation.SuppressLint; import android.content.Context; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.os.Build; import android.text.TextUtils;   import java.net.NetworkInterface; import java.util.Collections; import java.util.List;   public class DeviceInfoUtils {       /**      * 获取设备 MAC 地址      *      * @param context 上下文      * @return 设备 MAC 地址      */     @SuppressLint({"HardwareIds", "MissingPermission"})     public static String getDeviceMacAddress(Context context) {         String macAddress = "";         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) { // Android 6.0 以下             WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);             if (wifiManager != null) {                 WifiInfo wifiInfo = wifiManager.getConnectionInfo();                 if (wifiInfo != null) {                     macAddress = wifiInfo.getMacAddress();                 }             }         } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) { // Android 6.0 - Android 10.0             try {                 List<NetworkInterface> all = Collections.list(NetworkInterface.getNetworkInterfaces());                 for (NetworkInterface nif : all) {                     if (!nif.getName().equalsIgnoreCase("wlan0")) {                         continue;                     }                       byte[] macBytes = nif.getHardwareAddress();                     if (macBytes == null) {                         return "";                     }                       StringBuilder res1 = new StringBuilder();                     for (byte macByte : macBytes) {                         res1.append(String.format("%02X:", macByte));                     }                       if (res1.length() > 0) {                         res1.deleteCharAt(res1.length() - 1);                     }                       macAddress = res1.toString();                 }             } catch (Exception e) {                 e.printStackTrace();             }         } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) { // Android 10.0 以上             try {                 String iface = "wlan0";                 NetworkInterface networkInterface = NetworkInterface.getByName(iface);                 if (networkInterface == null) {                     return "";                 }                 byte[] hardwareAddress = networkInterface.getHardwareAddress();                 if (hardwareAddress == null || hardwareAddress.length == 0) {                     return "";                 }                 StringBuilder builder = new StringBuilder();                 for (byte b : hardwareAddress) {                     builder.append(String.format("%02X:", b));                 }                 if (builder.length() > 0) {                     builder.deleteCharAt(builder.length() - 1);                 }                 macAddress = builder.toString();             } catch (Exception e) {                 e.printStackTrace();             }         }         return macAddress;     } } ``` 调用该工具类获取设备的MAC地址：   ``` String macAddress = DeviceInfoUtils.getDeviceMacAddress(context); ``` 需要注意的是，Android 6.0 以上获取 MAC 地址需要申请 ACCESS_WIFI_STATE 权限。另外，从 Android Q 开始，不能直接获取设备的 MAC 地址，需要使用其他方式来获取设备的唯一标识符。