那些遇到过的问题

在Android 6.0中获取MAC地址

Maz*_*ger 41 android mac-address wifi

我正在开发一个获取设备MAC地址的应用程序,但是因为Android 6.0我的代码不起作用,给我一个不正确的值.

这是我的代码......

public String ObtenMAC()
{
    WifiManager manager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    WifiInfo info = manager.getConnectionInfo();

    return(info.getMacAddress().toUpperCase());
}
Run Code Online (Sandbox Code Playgroud)

它返回一个奇怪的代码:"02:00:00:00:00:00",而不是真正的MAC地址.

有人可以帮我解决吗？

Siu*_*Siu 33

请参阅Android 6.0更改.

为了向用户提供更好的数据保护,从此版本开始,Android会删除使用Wi-Fi和蓝牙API对应用程序的设备本地硬件标识符的编程访问.WifiInfo.getMacAddress()和BluetoothAdapter.getAddress()方法现在返回一个常量值02:00:00:00:00:00.

要通过蓝牙和Wi-Fi扫描访问附近外部设备的硬件标识符,您的应用现在必须具有ACCESS_FINE_LOCATION或ACCESS_COARSE_LOCATION权限.

  • 我在我的应用程序上拥有这些权限,但仍无效. (11认同)
  • @Hrodger,即使拥有这些权限,也无法获得自己的MAC.仔细读.据说你可以获得具有这些权限的其他设备MAC**,但不是你的 (7认同)
  • 所以没有办法做到这一点？ (4认同)
  • 你仍然可以通过java.net.NetworkInterface获得mac地址.是的,我对Google开发人员的能力非常看好;). (2认同)

Chi*_*hod 26

使用以下代码在Android 6.0中获取Mac地址

public static String getMacAddr() {
    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 b : macBytes) {
                res1.append(Integer.toHexString(b & 0xFF) + ":");
            }

            if (res1.length() > 0) {
                res1.deleteCharAt(res1.length() - 1);
            }
            return res1.toString();
        }
    } catch (Exception ex) {
        //handle exception
    }
    return "";
}
Run Code Online (Sandbox Code Playgroud)

  • 这个答案有一个错误,一个以十六进制形式得到一个数字的字节,在它之前不会出现"0".res1的附加应更改为res1.append(String.format("%02X:",b)); (9认同)
  • 以上答案来自这篇博客文章:http://robinhenniges.com/en/android6-get-mac-address-programically (7认同)
  • 适用于Android 7. (2认同)

小智 13

我没有得到上述工作的答案,但偶然发现了另一个答案.

这是获取IPv6地址然后从中获取mac地址的完整而简单的方法.

如何在Android Marshmallow中获取Wi-Fi Mac地址

public static String getMacAddr() {
    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 b : macBytes) {
                res1.append(String.format("%02X:",b));
            }

            if (res1.length() > 0) {
                res1.deleteCharAt(res1.length() - 1);
            }
            return res1.toString();
        }
    } catch (Exception ex) {
    }
    return "02:00:00:00:00:00";
}
Run Code Online (Sandbox Code Playgroud)

已经测试过,它可以工作.非常感谢Rob Anderson!

  • 谢谢,如其他地方所述,这需要<uses-permission android:name ="android.permission.INTERNET"/>才能工作. (2认同)

mhd*_*ati 11

这是在Marshmallow上成功获得它的完整2路代码,只需复制过去就可以了! 

//Android 6.0 : Access to mac address from WifiManager forbidden
    private static final String marshmallowMacAddress = "02:00:00:00:00:00";
    private static final String fileAddressMac = "/sys/class/net/wlan0/address";    

public static String recupAdresseMAC(WifiManager wifiMan) {
        WifiInfo wifiInf = wifiMan.getConnectionInfo();

        if(wifiInf.getMacAddress().equals(marshmallowMacAddress)){
            String ret = null;
            try {
                ret= getAdressMacByInterface();
                if (ret != null){
                    return ret;
                } else {
                    ret = getAddressMacByFile(wifiMan);
                    return ret;
                }
            } catch (IOException e) {
                Log.e("MobileAccess", "Erreur lecture propriete Adresse MAC");
            } catch (Exception e) {
                Log.e("MobileAcces", "Erreur lecture propriete Adresse MAC ");
            }
        } else{
            return wifiInf.getMacAddress();
        }
        return marshmallowMacAddress;
    }

private static String getAdressMacByInterface(){
        try {
            List<NetworkInterface> all = Collections.list(NetworkInterface.getNetworkInterfaces());
            for (NetworkInterface nif : all) {
                if (nif.getName().equalsIgnoreCase("wlan0")) {
                    byte[] macBytes = nif.getHardwareAddress();
                    if (macBytes == null) {
                        return "";
                    }

                    StringBuilder res1 = new StringBuilder();
                    for (byte b : macBytes) {
                        res1.append(String.format("%02X:",b));
                    }

                    if (res1.length() > 0) {
                        res1.deleteCharAt(res1.length() - 1);
                    }
                    return res1.toString();
                }
            }

        } catch (Exception e) {
            Log.e("MobileAcces", "Erreur lecture propriete Adresse MAC ");
        }
        return null;
    }

private static String getAddressMacByFile(WifiManager wifiMan) throws Exception {
        String ret;
        int wifiState = wifiMan.getWifiState();

        wifiMan.setWifiEnabled(true);
        File fl = new File(fileAddressMac);
        FileInputStream fin = new FileInputStream(fl);
        StringBuilder builder = new StringBuilder();
    int ch;
    while((ch = fin.read()) != -1){
        builder.append((char)ch);
    }

    ret = builder.toString();
    fin.close();

        boolean enabled = WifiManager.WIFI_STATE_ENABLED == wifiState;
        wifiMan.setWifiEnabled(enabled);
        return ret;
    }
Run Code Online (Sandbox Code Playgroud)

清单:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
Run Code Online (Sandbox Code Playgroud)

  • 简介:此代码将首先尝试通过接口获取MAC地址,如果失败则由文件系统获取.

  • 注意:对于文件系统方式,您需要启用WIFI才能访问该文件.

thnx到Sam的回答/sf/answers/2750220791/

Yoj*_*mbo 6

您可以从IPv6本地地址获取MAC地址.例如,IPv6地址"fe80 :: 1034:56ff:fe78:9abc"对应于MAC地址"12-34-56-78-9a-bc".请参阅下面的代码.获取WiFi IPv6地址只需要android.permission.INTERNET.

请参阅维基百科页面的IPv6地址,特别是关于"本地地址"fe80 ::/64的注释以及关于"修改的EUI-64"的部分.

/**
 * Gets an EUI-48 MAC address from an IPv6 link-local address.
 * E.g., the IPv6 address "fe80::1034:56ff:fe78:9abc"
 * corresponds to the MAC address "12-34-56-78-9a-bc".
 * <p/>
 * See the note about "local addresses" fe80::/64 and the section about "Modified EUI-64" in
 * the Wikipedia article "IPv6 address" at https://en.wikipedia.org/wiki/IPv6_address
 *
 * @param ipv6 An Inet6Address object.
 * @return The EUI-48 MAC address as a byte array, null on error.
 */
private static byte[] getMacAddressFromIpv6(final Inet6Address ipv6)
{
    byte[] eui48mac = null;

    if (ipv6 != null) {
        /*
         * Make sure that this is an fe80::/64 link-local address.
         */
        final byte[] ipv6Bytes = ipv6.getAddress();
        if ((ipv6Bytes != null) &&
                (ipv6Bytes.length == 16) &&
                (ipv6Bytes[0] == (byte) 0xfe) &&
                (ipv6Bytes[1] == (byte) 0x80) &&
                (ipv6Bytes[11] == (byte) 0xff) &&
                (ipv6Bytes[12] == (byte) 0xfe)) {
            /*
             * Allocate a byte array for storing the EUI-48 MAC address, then fill it
             * from the appropriate bytes of the IPv6 address. Invert the 7th bit
             * of the first byte and discard the "ff:fe" portion of the modified
             * EUI-64 MAC address.
             */
            eui48mac = new byte[6];
            eui48mac[0] = (byte) (ipv6Bytes[8] ^ 0x2);
            eui48mac[1] = ipv6Bytes[9];
            eui48mac[2] = ipv6Bytes[10];
            eui48mac[3] = ipv6Bytes[13];
            eui48mac[4] = ipv6Bytes[14];
            eui48mac[5] = ipv6Bytes[15];
        }
    }

    return eui48mac;
}
Run Code Online (Sandbox Code Playgroud)

小智 5

我尝试使用 2 种方法获取 mac 地址，首先通过接口，如果失败，我通过文件系统获取，但您需要启用 wifi 才能访问该文件。

//Android 6.0 : Access to mac address from WifiManager forbidden
    private static final String marshmallowMacAddress = "02:00:00:00:00:00";
    private static final String fileAddressMac = "/sys/class/net/wlan0/address";    

public static String recupAdresseMAC(WifiManager wifiMan) {
        WifiInfo wifiInf = wifiMan.getConnectionInfo();

        if(wifiInf.getMacAddress().equals(marshmallowMacAddress)){
            String ret = null;
            try {
                ret= getAdressMacByInterface();
                if (ret != null){
                    return ret;
                } else {
                    ret = getAddressMacByFile(wifiMan);
                    return ret;
                }
            } catch (IOException e) {
                Log.e("MobileAccess", "Erreur lecture propriete Adresse MAC");
            } catch (Exception e) {
                Log.e("MobileAcces", "Erreur lecture propriete Adresse MAC ");
            }
        } else{
            return wifiInf.getMacAddress();
        }
        return marshmallowMacAddress;
    }

private static String getAdressMacByInterface(){
        try {
            List<NetworkInterface> all = Collections.list(NetworkInterface.getNetworkInterfaces());
            for (NetworkInterface nif : all) {
                if (nif.getName().equalsIgnoreCase("wlan0")) {
                    byte[] macBytes = nif.getHardwareAddress();
                    if (macBytes == null) {
                        return "";
                    }

                    StringBuilder res1 = new StringBuilder();
                    for (byte b : macBytes) {
                        res1.append(String.format("%02X:",b));
                    }

                    if (res1.length() > 0) {
                        res1.deleteCharAt(res1.length() - 1);
                    }
                    return res1.toString();
                }
            }

        } catch (Exception e) {
            Log.e("MobileAcces", "Erreur lecture propriete Adresse MAC ");
        }
        return null;
    }

private static String getAddressMacByFile(WifiManager wifiMan) throws Exception {
        String ret;
        int wifiState = wifiMan.getWifiState();

        wifiMan.setWifiEnabled(true);
        File fl = new File(fileAddressMac);
        FileInputStream fin = new FileInputStream(fl);
        ret = convertStreamToString(fin);
        fin.close();

        boolean enabled = WifiManager.WIFI_STATE_ENABLED == wifiState;
        wifiMan.setWifiEnabled(enabled);
        return ret;
    }
Run Code Online (Sandbox Code Playgroud)

将此行添加到您的清单中。

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
Run Code Online (Sandbox Code Playgroud)

我建议你在你的偏好中保留你的 mac 地址，比如这里 

mac = activity.getSharedPreferences("MAC_ADDRESS", Context.MODE_PRIVATE).getString("MAC_ADDRESS", "");
                if(mac == null || mac.equals("")){
                    WifiManager wifiMan = (WifiManager) activity.getSystemService(Context.WIFI_SERVICE);
                    mac = MobileAccess.recupAdresseMAC(wifiMan);
                    if(mac != null && !mac.equals("")){
                        SharedPreferences.Editor editor = activity.getSharedPreferences("MAC_ADDRESS", Context.MODE_PRIVATE).edit();
                        editor.putString("MAC_ADDRESS", mac).commit();
                    }
                }
Run Code Online (Sandbox Code Playgroud)

Kes*_*era 5

非常好

package com.keshav.fetchmacaddress;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Collections;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.e("keshav","getMacAddr -> " +getMacAddr());
    }

    public static String getMacAddr() {
        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 b : macBytes) {
                    res1.append(Integer.toHexString(b & 0xFF) + ":");
                }

                if (res1.length() > 0) {
                    res1.deleteCharAt(res1.length() - 1);
                }
                return res1.toString();
            }
        } catch (Exception ex) {
            //handle exception
        }
        return "";
    }
}
Run Code Online (Sandbox Code Playgroud)

归档时间：

查看次数：

55604 次

最近记录：

6 年，1 月 前
以编程方式检索Android API版本 556
如何在Android Marshmallow中获取Wi-Fi Mac地址 16
如何在Android Marshmallow及更高版本中获取丢失的Wifi MAC地址？ 15
更多相关链接
相关归档
设置Android布局元素的背景颜色 188
imeOptions"actionNext"以编程方式 - 如何跳转到下一个字段？ 88
从22.0.1更新Android SDK工具到22.0.4(最新版本) 87
类型 'State&lt;List&lt;User&gt;?&gt;' 没有方法 'getValue(Nothing?, KProperty&lt;*&gt;)'，因此它不能作为委托 68
将HTML5转换为独立的Android应用程序 67
如何从Volley的响应中返回值？ 45
当应用程序处于Debug状态时,为什么Gradle在Release模式下构建我的模块 44
崩溃将AndroidKeyStoreRSAPrivateKey转换为RSAPrivateKey 41
为什么服务器无法获取客户端MAC地址,如客户端IP？ 13
将字符串从android发送到visual basic 2010 1
难疑归档
REST中的PUT与POST 5227
你如何设置,清除和切换一个位？ 2454
如何将列表拆分为大小均匀的块？ 2068
Git拒绝合并关于rebase的无关历史 1862
JavaScript切断/切片/修剪字符串中的最后一个字符 1840
静态只读与const 1349
SOAP与REST(差异) 1206
如何获得最近提交的Git分支列表？ 1197
感叹号在功能之前做了什么？ 1190
如何将参数传递给批处理文件？ 1100