Created
December 26, 2014 13:13
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import java.util.Arrays; | |
import android.content.Context; | |
import android.provider.Settings; | |
import android.telephony.TelephonyManager; | |
public class UniqueID { | |
public static String getDeviceId(Context context) { | |
String id = getUniqueID(context); | |
if (id == null) | |
id = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID); | |
return id; | |
} | |
private static String getUniqueID(Context context) { | |
String telephonyDeviceId = "NoTelephonyId"; | |
String androidDeviceId = "NoAndroidId"; | |
// get telephony id | |
try { | |
final TelephonyManager tm = | |
(TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); | |
telephonyDeviceId = tm.getDeviceId(); | |
if (telephonyDeviceId == null) { | |
telephonyDeviceId = "NoTelephonyId"; | |
} | |
} catch (Exception e) { | |
} | |
// get internal android device id | |
try { | |
androidDeviceId = | |
android.provider.Settings.Secure.getString(context.getContentResolver(), | |
android.provider.Settings.Secure.ANDROID_ID); | |
if (androidDeviceId == null) { | |
androidDeviceId = "NoAndroidId"; | |
} | |
} catch (Exception e) { | |
} | |
// build up the uuid | |
try { | |
String id = | |
getStringIntegerHexBlocks(androidDeviceId.hashCode()) + "-" | |
+ getStringIntegerHexBlocks(telephonyDeviceId.hashCode()); | |
return id; | |
} catch (Exception e) { | |
return "0000-0000-1111-1111"; | |
} | |
} | |
public static String getStringIntegerHexBlocks(int value) { | |
String result = ""; | |
String string = Integer.toHexString(value); | |
int remain = 8 - string.length(); | |
char[] chars = new char[remain]; | |
Arrays.fill(chars, '0'); | |
string = new String(chars) + string; | |
int count = 0; | |
for (int i = string.length() - 1; i >= 0; i--) { | |
count++; | |
result = string.substring(i, i + 1) + result; | |
if (count == 4) { | |
result = "-" + result; | |
count = 0; | |
} | |
} | |
if (result.startsWith("-")) { | |
result = result.substring(1, result.length()); | |
} | |
return result; | |
} | |
} |
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