android - What should the Android device ID length be

Question

Can anybody please tell me the length for device UDID in Android, because I got the UDID in android and it is only 16 characters, but the iPhone UDID length is 40.

I am using the following code to detect the ID:

id = android.provider.Settings.System.getString(super.getContentResolver(),
    android.provider.Settings.Secure.ANDROID_ID);

Answer 1

安卓 ID 是

最多 16 个字符

因为至少在某些常见的 Android 版本中没有假装前导零。看看这个类似问题的答案，为什么会这样： https ://stackoverflow.com/a/29890124/2066744

文档在此处将其指定为64 位数字（表示为十六进制字符串）： https ://developer.android.com/reference/android/provider/Settings.Secure.html#ANDROID_ID

Answer 2

我有两个使用此代码的设备

String device_id =  Secure.getString(getContentResolver(), Secure.ANDROID_ID);