如何确定Android设备唯一识别码
public class UniqueIDUtils {
private static final String TAG = "UniqueIDUtils";
private static String uniqueID;
private static String uniqueKey = "unique_id";
private static String uniqueIDDirPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS).getAbsolutePath();
private static String uniqueIDFile = "";
public static String getUniqueID(Context context) {
//三步读取：内存中，存储的SP表中，外部存储文件中
if (!TextUtils.isEmpty(uniqueID)) {
Log.e(TAG, "getUniqueID: 内存中获取" + uniqueID);
return uniqueID;
}
uniqueID = PreferenceManager.getDefaultSharedPreferences(context).getString(uniqueKey, "");
if (!TextUtils.isEmpty(uniqueID)) {
Log.e(TAG, "getUniqueID: SP中获取" + uniqueID);
return uniqueID;
}
readUniqueFile(context);
if (!TextUtils.isEmpty(uniqueID)) {
Log.e(TAG, "getUniqueID: 外部存储中获取" + uniqueID);
return uniqueID;
}
//两步创建：硬件获取；自行生成与存储
getDeviceID(context);
getAndroidID(context);
getSNID();
createUniqueID(context);
PreferenceManager.getDefaultSharedPreferences(context).edit().putString(uniqueKey, uniqueID);
return uniqueID;
}
@SuppressLint("MissingPermission")
private static void getDeviceID(Context context) {
if (!TextUtils.isEmpty(uniqueID)) {
return;
}
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.O_MR1) {
return;
}
String deviceId = null;
try {
deviceId = ((TelephonyManager) context.getSystemService(TELEPHONY_SERVICE)).getDeviceId();
if (TextUtils.isEmpty(deviceId)) {
return;
}
} catch (Exception e) {
e.printStackTrace();
return;
}
uniqueID = deviceId;
Log.e(TAG, "getUniqueID: DeviceId获取成功" + uniqueID);
}
private static void getAndroidID(Context context) {
if (!TextUtils.isEmpty(uniqueID)) {
return;
}
String androidID = null;
try {
androidID = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
if (TextUtils.isEmpty(androidID) || "9774d56d682e549c".equals(androidID)) {
return;
}
} catch (Exception e) {
e.printStackTrace();
return;
}
uniqueID = androidID;
Log.e(TAG, "getUniqueID: AndroidID获取成功" + uniqueID);
}
private static void getSNID() {
if (!TextUtils.isEmpty(uniqueID)) {
return;
}
String snID = Build.SERIAL;
if (TextUtils.isEmpty(snID)) {
return;
}
uniqueID = snID;
Log.e(TAG, "getUniqueID: SNID获取成功" + uniqueID);
}
private static void createUniqueID(Context context) {
if (!TextUtils.isEmpty(uniqueID)) {
return;
}
uniqueID = UUID.randomUUID().toString();
Log.e(TAG, "getUniqueID: UUID生成成功" + uniqueID);
File filesDir = new File(uniqueIDDirPath + File.separator + context.getApplicationContext().getPackageName());
if (!filesDir.exists()) {
filesDir.mkdir();
}
File file = new File(filesDir, uniqueIDFile);
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
FileOutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
outputStream.write(uniqueID.getBytes());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (outputStream != null) {
try {
outputStream.flush();
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
private static void readUniqueFile(Context context) {
File filesDir = new File(uniqueIDDirPath + File.separator + context.getApplicationContext().getPackageName());
File file = new File(filesDir, uniqueIDFile);
if (file.exists()) {
FileInputStream inputStream = null;
try {
inputStream = new FileInputStream(file);
byte[] bytes = new byte[(int) file.length()];
inputStream.read(bytes);
uniqueID = new String(bytes);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
public static void clearUniqueFile(Context context) {
File filesDir = new File(uniqueIDDirPath + File.separator + context.getApplicationContext().getPackageName());
deleteFile(filesDir);
}
private static void deleteFile(File file) {
if (file.isDirectory()) {
for (File listFile : file.listFiles()) {
deleteFile(listFile);
}
} else {
file.delete();
}
}
}