一手遮天 Android - 常用工具: 获取唯一标识
一手遮天 Android - 常用工具: 获取唯一标识
示例如下:
/utils/Demo2.java
/**
* 演示获取唯一标识的各种方法
*/
package com.webabcd.androiddemo.utils;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.text.TextUtils;
import android.widget.TextView;
import com.webabcd.androiddemo.R;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.net.NetworkInterface;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
public class Demo2 extends AppCompatActivity {
private TextView _textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_utils_demo2);
_textView1 = findViewById(R.id.textView1);
sample();
}
private void sample() {
// 判断 wifi 是否打开(wifi 没有打开的话是拿不到 wifi 的 mac 地址的)
// 如果获取到的 mac 地址是 02:00:00:00:00:00 或 00:00:00:00:00:00 则请认为他是无效的
_textView1.append("wifi enabled: " + isWifiEnabled());
_textView1.append("\n");
// Android 6 以下获取 mac 地址(api level < 23)
_textView1.append("mac(api level < 23): " + getMac1());
_textView1.append("\n");
// Android 6 获取 mac 地址(api level == 23)
_textView1.append("mac(api level == 23): " + getMac2());
_textView1.append("\n");
// Android 7 或以上获取 mac 地址(api level >= 24)
_textView1.append("mac(api level >= 24): " + getMac3());
_textView1.append("\n");
// 获取 ANDROID_ID(设备首次 boot 时生成,刷机的话是会变的)
// 如果获取到的是 9774d56d682e549c 则请认为他是无效的(这是一部分手机的 bug,他们都会返回这个值)
String androidId = Settings.System.getString(getContentResolver(), Settings.Secure.ANDROID_ID);
_textView1.append("android id: " + androidId);
_textView1.append("\n");
// 获取手机的一些信息,可以把它们哈希一下作为唯一标识,但是似乎没啥用
String phoneInfo = String.format(Locale.ENGLISH, "board:%s, brand:%s, supported_abis:%s, device:%s, display:%s, host:%s, " +
"id:%s, manufacturer:%s, model:%s, product:%s, tags:%s, type:%s, user:%s, time:%d",
Build.BOARD, Build.BRAND, Arrays.toString(Build.SUPPORTED_ABIS), Build.DEVICE, Build.DISPLAY, Build.HOST,
Build.ID, Build.MANUFACTURER, Build.MODEL, Build.PRODUCT, Build.TAGS, Build.TYPE, Build.USER, Build.TIME);
_textView1.append("phone info: " + phoneInfo);
_textView1.append("\n");
}
/**
* 检查 wifi 是否打开
*/
private boolean isWifiEnabled() {
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
return null != wifiManager && wifiManager.isWifiEnabled();
}
/**
* Android 6 以下获取 mac 地址(api level < 23)
* 需要权限 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
*/
public String getMac1() {
String mac = "";
WifiManager wifi = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
WifiInfo info = null;
try {
info = wifi.getConnectionInfo();
} catch (Exception ex) {
return ex.toString();
}
if (info == null) {
return null;
}
mac = info.getMacAddress();
if (!TextUtils.isEmpty(mac)) {
mac = mac.toUpperCase(Locale.ENGLISH);
}
return mac;
}
/**
* Android 6 获取 mac 地址(api level == 23)
*/
public String getMac2() {
String macSerial = null;
String str = "";
try {
Process pp = Runtime.getRuntime().exec("cat /sys/class/net/wlan0/address ");
InputStreamReader ir = new InputStreamReader(pp.getInputStream());
LineNumberReader input = new LineNumberReader(ir);
while (null != str) {
str = input.readLine();
if (str != null) {
macSerial = str.trim();
break;
}
}
} catch (IOException ex) {
return ex.toString();
}
if (!TextUtils.isEmpty(macSerial)) {
macSerial = macSerial.toUpperCase(Locale.ENGLISH);
}
return macSerial;
}
/**
* Android 7 或以上获取 mac 地址(api level >= 24)
* 需要权限 <uses-permission android:name="android.permission.INTERNET" />
*/
public String getMac3() {
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 (!TextUtils.isEmpty(res1)) {
res1.deleteCharAt(res1.length() - 1);
}
return res1.toString().toUpperCase(Locale.ENGLISH);
}
} catch (Exception ex) {
return ex.toString();
}
return "";
}
}
/layout/activity_utils_demo2.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>