WiFi MAC地址写入错误，没有发生改变

修改路径：frameworks/base/packages/SettingsLib/src/com/android/settingslib/deviceinfo/AbstractWifiMacAddressPreferenceController.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settingslib.deviceinfo;

import android.annotation.SuppressLint;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.text.TextUtils;

import androidx.annotation.VisibleForTesting;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;

import com.android.settingslib.R;
import com.android.settingslib.core.lifecycle.Lifecycle;

//*/tyd.lh 20230315 slove Wifi mac address display problem
import android.util.Log;
import java.util.Enumeration;
import android.system.ErrnoException;
import java.net.SocketException;
import java.net.NetworkInterface;
//*/
/**
 * Preference controller for WIFI MAC address
 */
public abstract class AbstractWifiMacAddressPreferenceController
        extends AbstractConnectivityPreferenceController {

    @VisibleForTesting
    static final String KEY_WIFI_MAC_ADDRESS = "wifi_mac_address";
    @VisibleForTesting
    static final int OFF = 0;
    @VisibleForTesting
    static final int ON = 1;

    private static final String[] CONNECTIVITY_INTENTS = {
            ConnectivityManager.CONNECTIVITY_ACTION,
            WifiManager.ACTION_LINK_CONFIGURATION_CHANGED,
            WifiManager.NETWORK_STATE_CHANGED_ACTION,
    };

    private Preference mWifiMacAddress;
    private final WifiManager mWifiManager;

    public AbstractWifiMacAddressPreferenceController(Context context, Lifecycle lifecycle) {
        super(context, lifecycle);
        mWifiManager = context.getSystemService(WifiManager.class);
    }

    @Override
    public boolean isAvailable() {
        return true;
    }

    @Override
    public String getPreferenceKey() {
        return KEY_WIFI_MAC_ADDRESS;
    }

    @Override
    public void displayPreference(PreferenceScreen screen) {
        super.displayPreference(screen);
        if (isAvailable()) {
            mWifiMacAddress = screen.findPreference(KEY_WIFI_MAC_ADDRESS);
            updateConnectivity();
        }
    }

    @Override
    protected String[] getConnectivityIntents() {
        return CONNECTIVITY_INTENTS;
    }

    @SuppressLint("HardwareIds")
    @Override
    protected void updateConnectivity() {
    //*/tyd.lh 20230315 slove Wifi mac address display problem
        final String[] macAddresses = mWifiManager.getFactoryMacAddresses();
        String macAddress = null;
        if (macAddresses != null && macAddresses.length > 0) {
            macAddress = macAddresses[0];
            //Log.d("luhao","luhao2"+macAddress);
        }
        if (TextUtils.isEmpty(macAddress) || macAddress.equals(WifiInfo.DEFAULT_MAC_ADDRESS)) {
            mWifiMacAddress.setSummary(R.string.status_unavailable);
        } else {
           getMacaddress();
        }
      //*/
    }
    //*/tyd.lh 20230315 slove Wifi mac address display problem
    public void getMacaddress(){
        try {
                NetworkInterface intf;
                String macAddress2 = null;
                Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
                while (interfaces.hasMoreElements()) {
                    intf = interfaces.nextElement();
                    if (null == intf ||
                            !TextUtils.equals("wlan0", intf.getName().toLowerCase())
                    ) {
                        continue;
                    }
                    final byte[] mac = intf.getHardwareAddress();
                    if (mac != null) {
                        StringBuilder buf = new StringBuilder();
                        for (byte aMac : mac) {
                            buf.append(String.format("%02X:", aMac));
                        }
                        if (buf.length() > 0) {
                            buf.deleteCharAt(buf.length() - 1);
                        }
                        macAddress2 = buf.toString();
                        //Log.d("luhao","luhao"+macAddress2);
                        mWifiMacAddress.setSummary(macAddress2);
                      //Log.d("luhao","luhao3"+macAddress2);
                    break;
                   }
                 }
               }catch (SocketException s)
                {
                 Log.e("SocketException", "File write failed: " + s.toString());
                }
         }
    //*/
}