Android 创建唯一标识UUID

使用该方法创建当前应用内唯一识别码

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.SharedPreferences;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.provider.Settings.Secure;

import java.nio.charset.StandardCharsets;
import java.util.Map;
import java.util.UUID;

public class DeviceUuidFactory {
    protected static final String PREFS_FILE = "device_id.xml";
    protected static final String PREFS_DEVICE_ID = "device_id";
    protected static UUID uuid;

    @SuppressLint("HardwareIds")
    public DeviceUuidFactory(Context context) {
        if (uuid == null) {
            final SharedPreferences prefs = context.getSharedPreferences(PREFS_FILE, 0);
            final String id = prefs.getString(PREFS_DEVICE_ID, null);
            if (id != null) {
                uuid = UUID.fromString(id);
            } else {
                final String androidId = Secure.getString(context.getContentResolver(),
                        Secure.ANDROID_ID);
                if (!"9774d56d682e549c".equals(androidId)) {
                    uuid = UUID.nameUUIDFromBytes(androidId
                            .getBytes(StandardCharsets.UTF_8));
                } else {
                    uuid = generateDeviceUuid(context);
                }
                prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString()).apply();
            }
        }
    }

    @SuppressLint("HardwareIds")
    private UUID generateDeviceUuid(Context context) {
        String buildParams = Build.BOARD + Build.BRAND + Build.CPU_ABI
                + Build.DEVICE + Build.DISPLAY + Build.FINGERPRINT + Build.HOST
                + Build.ID + Build.MANUFACTURER + Build.MODEL + Build.PRODUCT
                + Build.TAGS + Build.TYPE + Build.USER;
        String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);
        // requires ACCESS_WIFI_STATE
        WifiManager wm = (WifiManager) context
                .getSystemService(Context.WIFI_SERVICE);
        // gets the MAC address
        String mac = wm.getConnectionInfo().getMacAddress();
        // if we've got nothing, return a random UUID
        if (isEmpty(androidId) && isEmpty(mac)) {
            return UUID.randomUUID();
        }
        // concatenate the string
        String fullHash = buildParams + androidId + mac;
        return UUID.nameUUIDFromBytes(fullHash.getBytes());
    }

    public UUID getDeviceUuid() {
        return uuid;
    }

    private static boolean isEmpty(Object obj) {
        if (obj == null) {
            return true;
        }
        if ((obj instanceof String) && (((String) obj).trim().length() == 0)) {
            return true;
        }
        if (obj instanceof Map) {
            return ((Map<?, ?>) obj).isEmpty();
        }
        return false;
    }
}

使用方法()

        DeviceUuidFactory uuidFactory = new DeviceUuidFactory(getApplicationContext());
        String uuid = uuidFactory.getDeviceUuid().toString();