Android平板获取唯一标识DeviceId

Android设备获取唯一标识DeviceId

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.SharedPreferences;
import android.provider.Settings;
import android.telephony.TelephonyManager;

import java.io.UnsupportedEncodingException;
import java.util.UUID;

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

    public static void DeviceUuidFactory(Context context) {
        if( uuid ==null ) {
            synchronized (DeviceUuidFactory.class) {
                if( uuid == null) {
                    //读取厂家写入地址
                    final SharedPreferences prefs = context.getSharedPreferences( PREFS_FILE, 0);
                    final String id = prefs.getString(PREFS_DEVICE_ID, null );
                    if (id != null) {
                        // Use the ids previously computed and stored in the prefs file
                        uuid = UUID.fromString(id); 
                        Common.DEVICE_ID = uuid+"";
                    } else {
                        final String androidId = Settings.Secure.getString(
                                context.getContentResolver(), Settings.Secure.ANDROID_ID);

                        // Use the Android ID unless it's broken, in which case fallback on deviceId,
                        // unless it's not available, then fallback on a random number which we store
                        // to a prefs file
                        try {
                            if (!"9774d56d682e549c".equals(androidId)) {
                                uuid = UUID.nameUUIDFromBytes(androidId.getBytes("utf8"));
                            } else {
                                @SuppressLint("MissingPermission")
                                final String deviceId = ((TelephonyManager) context.getSystemService(
                                        Context.TELEPHONY_SERVICE )).getDeviceId();
                                uuid = deviceId!=null ? UUID.nameUUIDFromBytes(
                                        deviceId.getBytes("utf8")) : UUID.randomUUID();
                            }
                        } catch (UnsupportedEncodingException e) {
                            throw new RuntimeException(e);
                        } 
                        Common.DEVICE_ID = uuid.toString();
                        // Write the value out to the prefs file
                        prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString() ).commit();
                    }
                }
            }
        }
    }