This is what I tried.
mTextView.setText("MODEL: "+android.os.Build.MODEL
+"\nDEVICE: "+android.os.Build.DEVICE
+"\nBRAND: "+android.os.Build.BRAND
+"\nDISPLAY: "+android.os.Build.DISPLAY
+"\nBOARD: "+android.os.Build.BOARD
+"\nHOST: "+android.os.Build.HOST
+"\nMANUFACTURER: "+android.os.Build.MANUFACTURER
+"\nPRODUCT: "+android.os.Build.PRODUCT);
Can anyone tell me how to get these outputs:
Samsung Galaxy S
Samsung note 3
Sony Xperia z
Sony Xperai z1
Samsung Grand
for nexus it shows nexus 4 or nexus 7 not the same case with sony or samsung.
you can use:
public String getDeviceName() {
String manufacturer = Build.MANUFACTURER;
String model = Build.MODEL;
if (model.startsWith(manufacturer)) {
return capitalize(model);
} else {
return capitalize(manufacturer) + " " + model;
}
}
private String capitalize(String s) {
if (s == null || s.length() == 0) {
return "";
}
char first = s.charAt(0);
if (Character.isUpperCase(first)) {
return s;
} else {
return Character.toUpperCase(first) + s.substring(1);
}
}
see this for Build.MODEL.
more info in Get Android Phone Model Programmatically.
In order to get android device name you have to add only a single line of code:
android.os.Build.MODEL;
Found here:getting-android-device-name
Download csv from here:
https://support.google.com/googleplay/answer/1727131?hl=en
See if your device works with Google Play by checking the list below.
When you download the PDF file, devices are ordered alphabetically
(A-Z) by manufacturer name.
Then import this file into your database.
Query RetailBranding and Marketing Name by Model = Build.Model.
To have a better performance, put these data in your database server.
Get the RetailBranding and Marketing Name when the app is first launched and save it to the local database.
you can also get it via bluetoothAdapter see this
public String getPhoneName()
{
BluetoothAdapter myDevice = BluetoothAdapter.getDefaultAdapter();
String deviceName = myDevice.getName();
return deviceName;
}
I'm Trying the following code to get System phone number
TelephonyManager tMgr =(TelephonyManager)mAppContext.getSystemService(Context.TELEPHONY_SERVICE);
mPhoneNumber = tMgr.getLine1Number();
But it is not working.
In my phone, i use
Settings->About Phone-->Status-Phone Number
is there a simple app i can use ? , I m writing from Turkey. does sim card make a difference ?
Not all telecom carriers store the phone number on the SIM card. The approach you are using only works if the SIM card in the device has the mobile number stored on it.
If you cannot see your phone number in the mobile settings, then it means that it isn't stored on the SIM card. You will have to manually ask the user to enter it into your app if you absolutely need it. There is no other way.
You can try something like this. It works perfectly.
public String getPhoneNumber(Context context) {
TelephonyManager mTelephonyMgr;
mTelephonyMgr = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
String num = mTelephonyMgr.getLine1Number();
return fillPhoneNumber(num);
}
private String fillPhoneNumber(String num) {
try{
if (num != null && num.length() > 0) {
if (num.length() >= 9) {
num = num.replaceAll("\\D", "");
if (num.substring(0, 1).equals("8")) {
num = "+3" + num;
} else if (num.substring(0, 1).equals("0")) {
num = "+38" + num;
} else if (num.substring(0, 1).equals("3")) {
num = "+" + num;
}
}
return num;
}
}catch (Exception e) {
e.printStackTrace();
}
return null;
}
Note: Not all phones return a phone number.
There is no deterministic way to find the MSISDN. The above approach only works if SIM has stored the MSISDN. Other work around is to retrieve the number from facebook. It also may or may not work.
The only sure shot way is to create account with some SMS gateway provider like http://trumpia.com, then send SMS to the toll free number, and then call the API to retrieve the MSISDN.
When talking about unique Android ID's, I'm sure everyone has seen this, however I too am trying to come up with a solution to uniquely identify any android device. I would be happy to use a publicly released class but I am yet to find one.
In my situation, the requirement is to be able to uniquely identify any devices that have some form of an internet connection (such as GPRS or Wi-Fi) and run on API level 8 (v2.2 Froyo). I'm not aware of any devices that doesn't have Wi-Fi or a SIM so let me know if there is any!
We solved this problem in iOS by using a hash of the Wi-Fi mac address as all iOS devices should have this. However for Android, techniques (such as the answers to the SO post referenced above) refer to the TelephonyManager class which can return null (such as when the device doesn't have a SIM connection, like with the Nexus 7) or getContext().getContentResolver(), Secure.ANDROID_ID which according to here isn't 100% reliable on versions prior to Froyo (which is fortunate for me). It doesn't however state of any issues post-Froyo so again, if there are any, let me know! I've also read this can return null. According to here it can change on a factory reset, but that isn't a major concern.
So I put together this to generate a hopefully-unique-GUID:
[This method is not complete!]
public static String GetDeviceId(Context context)
{
// Custom String Hash 1
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("someRandomData"); // Not really needed, but means the stringBuilders value won't ever be null
// TM Device String
final TelephonyManager tm = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
String tmDeviceId = tm.getDeviceId(); // Could well be set to null!
LogMsg.Tmp("TM Device String [" + tmDeviceId + "]");
// Custom String Hash 2
stringBuilder.append(tmDeviceId);
int customHash = stringBuilder.toString().hashCode();
LogMsg.Tmp("Custom String hash [" + customHash + "]");
// Device ID String
String androidIDString = android.provider.Settings.Secure.getString(context.getContentResolver(), android.provider.Settings.Secure.ANDROID_ID);
LogMsg.Tmp("Device ID String [" + androidIDString + "]");
// Combined hashes as GUID
UUID deviceUuid = new UUID(androidIDString.hashCode(), ((long)customHash << 32));
LogMsg.Tmp("Combined hashes as GUID [" + deviceUuid.toString() + "]");
return deviceUuid.toString();
}
So you may find tmDeviceId being set to null, in this case the the customHash will be the same regardless of the device but then this combined with androidIDString should be globally unique. I think. Obviously I will need to work out if tmDeviceId AND androidIDString aren't available and throw an exception there.
So... is this overkill? If so, is it safe to just use context.getContentResolver(), android.provider.Settings.Secure.ANDROID_ID?
Why don't you get MAC address of the device as you've done in iOS? This can be performed in Android devices as well.
I'll give a code snippet that obtains mac address of the device..
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class HardwareUtil {
public static String getMacAddress()
{
try{
Process process = Runtime.getRuntime().exec("cat /sys/class/net/eth0/address");
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
int read;
char[] buffer = new char[4096];
StringBuffer output = new StringBuffer();
while ((read = reader.read(buffer)) > 0){
output.append(buffer, 0, read);
}
reader.close();
process.waitFor();
String hwaddr = output.toString();
return hwaddr;
}catch (IOException e) {
e.printstacktrace();
}catch (InterruptedException e){
e.printstacktrace();
}
}
}
HardwareUtil.getMacAddress() will return mac address of the device.
EDIT: If mac address is not appropriate for your situation. Following can be useful!
public static String getDeviceId(Context context) {
final String deviceId = ((TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE)).getDeviceId();
if (deviceId != null) {
return deviceId;
} else {
return android.os.Build.SERIAL;
}
}
Don't forget to add following permission to your AndoridManifest.xml file if you use getDeviceId method.
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
I need to use a unique ID for an Android app and I thought the serial number for the device would be a good candidate. How do I retrieve the serial number of an Android device in my app ?
TelephonyManager tManager = (TelephonyManager)myActivity.getSystemService(Context.TELEPHONY_SERVICE);
String uid = tManager.getDeviceId();
getSystemService is a method from the Activity class. getDeviceID() will return the MDN or MEID of the device depending on which radio the phone uses (GSM or CDMA).
Each device MUST return a unique value here (assuming it's a phone). This should work for any Android device with a sim slot or CDMA radio. You're on your own with that Android powered microwave ;-)
As Dave Webb mentions, the Android Developer Blog has an article that covers this.
I spoke with someone at Google to get some additional clarification on a few items. Here's what I discovered that's NOT mentioned in the aforementioned blog post:
ANDROID_ID is the preferred solution. ANDROID_ID is perfectly reliable on versions of Android <=2.1 or >=2.3. Only 2.2 has the problems mentioned in the post.
Several devices by several manufacturers are affected by the ANDROID_ID bug in 2.2.
As far as I've been able to determine, all affected devices have the same ANDROID_ID, which is 9774d56d682e549c. Which is also the same device id reported by the emulator, btw.
Google believes that OEMs have patched the issue for many or most of their devices, but I was able to verify that as of the beginning of April 2011, at least, it's still quite easy to find devices that have the broken ANDROID_ID.
Based on Google's recommendations, I implemented a class that will generate a unique UUID for each device, using ANDROID_ID as the seed where appropriate, falling back on TelephonyManager.getDeviceId() as necessary, and if that fails, resorting to a randomly generated unique UUID that is persisted across app restarts (but not app re-installations).
import android.content.Context;
import android.content.SharedPreferences;
import android.provider.Settings.Secure;
import android.telephony.TelephonyManager;
import java.io.UnsupportedEncodingException;
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 volatile UUID uuid;
public DeviceUuidFactory(Context context) {
if (uuid == null) {
synchronized (DeviceUuidFactory.class) {
if (uuid == null) {
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);
} else {
final String androidId = Secure.getString(
context.getContentResolver(), 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 {
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);
}
// 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.
*
* 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.
*
* 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.
*
* 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.
*
* Works around a bug in Android 2.2 for many devices when using ANDROID_ID
* directly.
*
* #see http://code.google.com/p/android/issues/detail?id=10603
*
* #return a UUID that may be used to uniquely identify your device for most
* purposes.
*/
public UUID getDeviceUuid() {
return uuid;
}
}
String serial = null;
try {
Class<?> c = Class.forName("android.os.SystemProperties");
Method get = c.getMethod("get", String.class);
serial = (String) get.invoke(c, "ro.serialno");
} catch (Exception ignored) {
}
This code returns device serial number using a hidden Android API.
String deviceId = Settings.System.getString(getContentResolver(),
Settings.System.ANDROID_ID);
Although, it is not guaranteed that the Android ID will be an unique identifier.
There is an excellent post on the Android Developer's Blog discussing this.
It recommends against using TelephonyManager.getDeviceId() as it doesn't work on Android devices which aren't phones such as tablets, it requires the READ_PHONE_STATE permission and it doesn't work reliably on all phones.
Instead you could use one of the following:
Mac Address
Serial Number
ANDROID_ID
The post discusses the pros and cons of each and it's worth reading so you can work out which would be the best for your use.
For a simple number that is unique to the device and constant for its lifetime (barring a factory reset or hacking), use Settings.Secure.ANDROID_ID.
String id = Secure.getString(getContentResolver(), Secure.ANDROID_ID);
To use the device serial number (the one shown in "System Settings / About / Status") if available and fall back to Android ID:
String serialNumber = Build.SERIAL != Build.UNKNOWN ? Build.SERIAL : Secure.getString(getContentResolver(), Secure.ANDROID_ID);
The IMEI is good but only works on Android devices with phone. You should consider support for Tablets or other Android devices as well, that do not have a phone.
You have some alternatives like: Build class members, BT MAC, WLAN MAC, or even better - a combination of all these.
I have explained these details in an article on my blog, see:
http://www.pocketmagic.net/?p=1662
Since no answer here mentions a perfect, fail-proof ID that is both PERSISTENT through system updates and exists in ALL devices (mainly due to the fact that there isn't an individual solution from Google), I decided to post a method that is the next best thing by combining two of the available identifiers, and a check to chose between them at run-time.
Before code, 3 facts:
TelephonyManager.getDeviceId() (a.k.a.IMEI) will not work well or at all for non-GSM, 3G, LTE, etc. devices, but will always return a unique ID when related hardware is present, even when no SIM is inserted or even when no SIM slot exists (some OEM's have done this).
Since Gingerbread (Android 2.3) android.os.Build.SERIAL must exist on any device that doesn't provide IMEI, i.e., doesn't have the aforementioned hardware present, as per Android policy.
Due to fact (2.), at least one of these two unique identifiers will ALWAYS be present, and SERIAL can be present at the same time that IMEI is.
Note: Fact (1.) and (2.) are based on Google statements
SOLUTION
With the facts above, one can always have a unique identifier by checking if there is IMEI-bound hardware, and fall back to SERIAL when it isn't, as one cannot check if the existing SERIAL is valid. The following static class presents 2 methods for checking such presence and using either IMEI or SERIAL:
import java.lang.reflect.Method;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.provider.Settings;
import android.telephony.TelephonyManager;
import android.util.Log;
public class IDManagement {
public static String getCleartextID_SIMCHECK (Context mContext){
String ret = "";
TelephonyManager telMgr = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
if(isSIMAvailable(mContext,telMgr)){
Log.i("DEVICE UNIQUE IDENTIFIER",telMgr.getDeviceId());
return telMgr.getDeviceId();
}
else{
Log.i("DEVICE UNIQUE IDENTIFIER", Settings.Secure.ANDROID_ID);
// return Settings.Secure.ANDROID_ID;
return android.os.Build.SERIAL;
}
}
public static String getCleartextID_HARDCHECK (Context mContext){
String ret = "";
TelephonyManager telMgr = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
if(telMgr != null && hasTelephony(mContext)){
Log.i("DEVICE UNIQUE IDENTIFIER",telMgr.getDeviceId() + "");
return telMgr.getDeviceId();
}
else{
Log.i("DEVICE UNIQUE IDENTIFIER", Settings.Secure.ANDROID_ID);
// return Settings.Secure.ANDROID_ID;
return android.os.Build.SERIAL;
}
}
public static boolean isSIMAvailable(Context mContext,
TelephonyManager telMgr){
int simState = telMgr.getSimState();
switch (simState) {
case TelephonyManager.SIM_STATE_ABSENT:
return false;
case TelephonyManager.SIM_STATE_NETWORK_LOCKED:
return false;
case TelephonyManager.SIM_STATE_PIN_REQUIRED:
return false;
case TelephonyManager.SIM_STATE_PUK_REQUIRED:
return false;
case TelephonyManager.SIM_STATE_READY:
return true;
case TelephonyManager.SIM_STATE_UNKNOWN:
return false;
default:
return false;
}
}
static public boolean hasTelephony(Context mContext)
{
TelephonyManager tm = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
if (tm == null)
return false;
//devices below are phones only
if (Build.VERSION.SDK_INT < 5)
return true;
PackageManager pm = mContext.getPackageManager();
if (pm == null)
return false;
boolean retval = false;
try
{
Class<?> [] parameters = new Class[1];
parameters[0] = String.class;
Method method = pm.getClass().getMethod("hasSystemFeature", parameters);
Object [] parm = new Object[1];
parm[0] = "android.hardware.telephony";
Object retValue = method.invoke(pm, parm);
if (retValue instanceof Boolean)
retval = ((Boolean) retValue).booleanValue();
else
retval = false;
}
catch (Exception e)
{
retval = false;
}
return retval;
}
}
I would advice on using getCleartextID_HARDCHECK. If the reflection doesn't stick in your environment, use the getCleartextID_SIMCHECK method instead, but take in consideration it should be adapted to your specific SIM-presence needs.
P.S.: Do please note that OEM's have managed to bug out SERIAL against Google policy (multiple devices with same SERIAL), and Google as stated there is at least one known case in a big OEM (not disclosed and I don't know which brand it is either, I'm guessing Samsung).
Disclaimer: This answers the original question of getting a unique device ID, but the OP introduced ambiguity by stating he needs a unique ID for an APP. Even if for such scenarios Android_ID would be better, it WILL NOT WORK after, say, a Titanium Backup of an app through 2 different ROM installs (can even be the same ROM). My solution maintains persistence that is independent of a flash or factory reset, and will only fail when IMEI or SERIAL tampering occurs through hacks/hardware mods.
There are problems with all the above approaches. At Google i/o Reto Meier released a robust answer to how to approach this which should meet most developers needs to track users across installations.
This approach will give you an anonymous, secure user ID which will be persistent for the user across different devices (including tablets, based on primary Google account) and across installs on the same device. The basic approach is to generate a random user ID and to store this in the apps shared preferences. You then use Google's backup agent to store the shared preferences linked to the Google account in the cloud.
Lets go through the full approach. First we need to create a backup for our SharedPreferences using the Android Backup Service. Start by registering your app via this link: http://developer.android.com/google/backup/signup.html
Google will give you a backup service key which you need to add to the manifest. You also need to tell the application to use the BackupAgent as follows:
<application android:label="MyApplication"
android:backupAgent="MyBackupAgent">
...
<meta-data android:name="com.google.android.backup.api_key"
android:value="your_backup_service_key" />
</application>
Then you need to create the backup agent and tell it to use the helper agent for sharedpreferences:
public class MyBackupAgent extends BackupAgentHelper {
// The name of the SharedPreferences file
static final String PREFS = "user_preferences";
// A key to uniquely identify the set of backup data
static final String PREFS_BACKUP_KEY = "prefs";
// Allocate a helper and add it to the backup agent
#Override
public void onCreate() {
SharedPreferencesBackupHelper helper = new SharedPreferencesBackupHelper(this, PREFS);
addHelper(PREFS_BACKUP_KEY, helper);
}
}
To complete the backup you need to create an instance of BackupManager in your main Activity:
BackupManager backupManager = new BackupManager(context);
Finally create a user ID, if it doesn't already exist, and store it in the SharedPreferences:
public static String getUserID(Context context) {
private static String uniqueID = null;
private static final String PREF_UNIQUE_ID = "PREF_UNIQUE_ID";
if (uniqueID == null) {
SharedPreferences sharedPrefs = context.getSharedPreferences(
MyBackupAgent.PREFS, Context.MODE_PRIVATE);
uniqueID = sharedPrefs.getString(PREF_UNIQUE_ID, null);
if (uniqueID == null) {
uniqueID = UUID.randomUUID().toString();
Editor editor = sharedPrefs.edit();
editor.putString(PREF_UNIQUE_ID, uniqueID);
editor.commit();
//backup the changes
BackupManager mBackupManager = new BackupManager(context);
mBackupManager.dataChanged();
}
}
return uniqueID;
}
This User_ID will now be persistent across installations, even if the user switches devices.
For more information on this approach see Reto's talk here http://www.google.com/events/io/2011/sessions/android-protips-advanced-topics-for-expert-android-app-developers.html
And for full details of how to implement the backup agent see the developer site here: http://developer.android.com/guide/topics/data/backup.html
I particularly recommend the section at the bottom on testing as the backup does not happen instantaneously and so to test you have to force the backup.
Another way is to use /sys/class/android_usb/android0/iSerial in an App with no permissions whatsoever.
user#creep:~$ adb shell ls -l /sys/class/android_usb/android0/iSerial
-rw-r--r-- root root 4096 2013-01-10 21:08 iSerial
user#creep:~$ adb shell cat /sys/class/android_usb/android0/iSerial
0A3CXXXXXXXXXX5
To do this in java one would just use a FileInputStream to open the iSerial file and read out the characters. Just be sure you wrap it in an exception handler because not all devices have this file.
At least the following devices are known to have this file world-readable:
Galaxy Nexus
Nexus S
Motorola Xoom 3g
Toshiba AT300
HTC One V
Mini MK802
Samsung Galaxy S II
You can also see my blog post here: http://insitusec.blogspot.com/2013/01/leaking-android-hardware-serial-number.html where I discuss what other files are available for info.
As #haserman says:
TelephonyManager tManager = (TelephonyManager)myActivity.getSystemService(Context.TELEPHONY_SERVICE);
String uid = tManager.getDeviceId();
But it's necessary including the permission in the manifest file:
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
Unique device ID of Android OS Device as String.
String deviceId;
final TelephonyManager mTelephony = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
if (mTelephony.getDeviceId() != null){
deviceId = mTelephony.getDeviceId();
}
else{
deviceId = Secure.getString(getApplicationContext().getContentResolver(), Secure.ANDROID_ID);
}
but I strngly recommend this method suggested by Google::
Identifying App Installations
Build.SERIAL is the simplest way to go, although not entirely reliable as it can be empty or sometimes return a different value (proof 1, proof 2) than what you can see in your device's settings.
There are several ways to get that number depending on the device's manufacturer and Android version, so I decided to compile every possible solution I could found in a single gist. Here's a simplified version of it :
public static String getSerialNumber() {
String serialNumber;
try {
Class<?> c = Class.forName("android.os.SystemProperties");
Method get = c.getMethod("get", String.class);
serialNumber = (String) get.invoke(c, "gsm.sn1");
if (serialNumber.equals(""))
serialNumber = (String) get.invoke(c, "ril.serialnumber");
if (serialNumber.equals(""))
serialNumber = (String) get.invoke(c, "ro.serialno");
if (serialNumber.equals(""))
serialNumber = (String) get.invoke(c, "sys.serialnumber");
if (serialNumber.equals(""))
serialNumber = Build.SERIAL;
// If none of the methods above worked
if (serialNumber.equals(""))
serialNumber = null;
} catch (Exception e) {
e.printStackTrace();
serialNumber = null;
}
return serialNumber;
}
I know this question is old but it can be done in one line of code
String deviceID = Build.SERIAL;
Starting in Android 10, apps must have the READ_PRIVILEGED_PHONE_STATE privileged permission in order to access the device's non-resettable identifiers, which include both IMEI and serial number.
Affected methods include the following:
Build
getSerial()
TelephonyManager
getImei()
getDeviceId()
getMeid()
getSimSerialNumber()
getSubscriberId()
READ_PRIVILEGED_PHONE_STATE is available for platform only
public static String getManufacturerSerialNumber() {
String serial = null;
try {
Class<?> c = Class.forName("android.os.SystemProperties");
Method get = c.getMethod("get", String.class, String.class);
serial = (String) get.invoke(c, "ril.serialnumber", "unknown");
} catch (Exception ignored) {}
return serial;
}
Works on API 29 and 30, tested on Samsung galaxy s7 s9 Xcover
I found the example class posted by #emmby above to be a great starting point. But it has a couple of flaws, as mentioned by other posters. The major one is that it persists the UUID to an XML file unnecessarily and thereafter always retrieves it from this file. This lays the class open to an easy hack: anyone with a rooted phone can edit the XML file to give themselves a new UUID.
I've updated the code so that it only persists to XML if absolutely necessary (i.e. when using a randomly generated UUID) and re-factored the logic as per #Brill Pappin's answer:
import android.content.Context;
import android.content.SharedPreferences;
import android.provider.Settings.Secure;
import android.telephony.TelephonyManager;
import java.io.UnsupportedEncodingException;
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;
public DeviceUuidFactory(Context context) {
if( uuid ==null ) {
synchronized (DeviceUuidFactory.class) {
if( uuid == null) {
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);
} else {
final String androidId = Secure.getString(context.getContentResolver(), 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) || (androidId == null) ) {
final String deviceId = ((TelephonyManager) context.getSystemService( Context.TELEPHONY_SERVICE )).getDeviceId();
if (deviceId != null)
{
uuid = UUID.nameUUIDFromBytes(deviceId.getBytes("utf8"));
}
else
{
uuid = UUID.randomUUID();
// Write the value out to the prefs file so it persists
prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString() ).commit();
}
}
else
{
uuid = UUID.nameUUIDFromBytes(androidId.getBytes("utf8"));
}
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
}
}
}
}
/**
* 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.
*
* 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.
*
* 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.
*
* 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.
*
* Works around a bug in Android 2.2 for many devices when using ANDROID_ID directly.
*
* #see http://code.google.com/p/android/issues/detail?id=10603
*
* #return a UUID that may be used to uniquely identify your device for most purposes.
*/
public UUID getDeviceUuid() {
return uuid;
}
Yes. It is a device hardware serial number and it is unique. So on api level 2.3 and above you can use android.os.Build.ANDROID_ID to get it. For below 2.3 API level use TelephonyManager.getDeviceID().
you can read this http://android-developers.blogspot.in/2011/03/identifying-app-installations.html