package com.lcjian.library;
|
|
import java.io.UnsupportedEncodingException;
|
import java.util.UUID;
|
|
import android.content.Context;
|
import android.content.SharedPreferences;
|
import android.content.pm.PackageManager;
|
import android.provider.Settings.Secure;
|
import androidx.core.content.ContextCompat;
|
import android.telephony.TelephonyManager;
|
|
import com.lcjian.library.util.common.DeviceUtil;
|
|
public class DeviceUuidFactory {
|
|
|
protected static final String PREFS_FILE = "device_id.xml";
|
|
protected static final String PREFS_DEVICE_ID = "device_id";
|
|
protected volatile static UUID uuid;
|
|
public DeviceUuidFactory(Context context) {
|
if (uuid == null) {
|
synchronized (DeviceUuidFactory.class) {
|
if (uuid == null) {
|
final SharedPreferences prefs = context.getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE);
|
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);
|
} else {
|
final String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);
|
if (androidId == null)
|
return;
|
// 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 {
|
TelephonyManager tm = (TelephonyManager) context
|
.getSystemService(Context.TELEPHONY_SERVICE);
|
String deviceId="";
|
if (ContextCompat.checkSelfPermission(context, android.Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED
|
|| ContextCompat.checkSelfPermission(context, android.Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
|
deviceId = DeviceUtil.getImeiCache(context);
|
}
|
uuid = deviceId != null ? UUID.nameUUIDFromBytes(deviceId.getBytes("utf8")) : UUID.randomUUID();
|
}
|
} catch (UnsupportedEncodingException e) {
|
throw new RuntimeException(e);
|
}
|
// Write the value out to the prefs file
|
prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString()).commit();
|
}
|
}
|
}
|
}
|
}
|
|
/**
|
* Returns a unique UUID for the current android device. As with all UUIDs, this unique ID is "very highly likely"
|
* to be unique across all Android devices. Much more so than ANDROID_ID is.
|
* <p>
|
* The UUID is generated by using ANDROID_ID as the base key if appropriate, falling back on
|
* TelephonyManager.getDeviceID() if ANDROID_ID is known to be incorrect, and finally falling back
|
* on a random UUID that's persisted to SharedPreferences if getDeviceID() does not return a
|
* usable value.
|
* <p>
|
* In some rare circumstances, this ID may change. In particular, if the device is factory reset a new device ID
|
* may be generated. In addition, if a user upgrades their phone from certain buggy implementations of Android 2.2
|
* to a newer, non-buggy version of Android, the device ID may change. Or, if a user uninstalls your app on
|
* a device that has neither a proper Android ID nor a Device ID, this ID may change on reinstallation.
|
* <p>
|
* Note that if the code falls back on using TelephonyManager.getDeviceId(), the resulting ID will NOT
|
* change after a factory reset. Something to be aware of.
|
* <p>
|
* Works around a bug in Android 2.2 for many devices when using ANDROID_ID directly.
|
*
|
* @return a UUID that may be used to uniquely identify your device for most purposes.
|
* @see http://code.google.com/p/android/issues/detail?id=10603
|
*/
|
public UUID getDeviceUuid() {
|
return uuid;
|
}
|
}
|
