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Docs: Updating ANDROID_ID information to reflect Android O changes.

Browse Source 
Bug: 38270718

Test: Verified on local build.

Change-Id: If4f86d261ae950cc14579aeba65c36a289cdf56c
This commit is contained in:
Dave Friedman
2017-06-14 18:45:58 -07:00
parent ff5a0512ec
commit 4b3a4b58ed
1 changed files with 32 additions and 10 deletions
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42
core/java/android/provider/Settings.java
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@@ -5106,17 +5106,39 @@ public final class Settings {
public static final String ALLOW_MOCK_LOCATION = "mock_location";
/**
* A 64-bit number (as a hex string) that is randomly
* generated when the user first sets up the device and should remain
* constant for the lifetime of the user's device. The value may
* change if a factory reset is performed on the device.
* <p class="note"><strong>Note:</strong> When a device has <a
* href="{@docRoot}about/versions/android-4.2.html#MultipleUsers">multiple users</a>
* (available on certain devices running Android 4.2 or higher), each user appears as a
* completely separate device, so the {@code ANDROID_ID} value is unique to each
* user.</p>
* On Android 8.0 (API level 26) and higher versions of the platform,
* a 64-bit number (expressed as a hexadecimal string), unique to
* each combination of app-signing key, user, and device.
* Values of {@code ANDROID_ID} are scoped by signing key and user.
* The value may change if a factory reset is performed on the
* device or if an APK signing key changes.
*
* <p class="note"><strong>Note:</strong> If the caller is an Instant App the id is scoped
* For more information about how the platform handles {@code ANDROID_ID}
* in Android 8.0 (API level 26) and higher, see <a
* href="{@docRoot}preview/behavior-changes.html#privacy-all">
* Android 8.0 Behavior Changes</a>.
*
* <p class="note"><strong>Note:</strong> For apps that were installed
* prior to updating the device to a version of Android 8.0
* (API level 26) or higher, the value of {@code ANDROID_ID} changes
* if the app is uninstalled and then reinstalled after the OTA.
* To preserve values across uninstalls after an OTA to Android 8.0
* or higher, developers can use
* <a href="{@docRoot}guide/topics/data/keyvaluebackup.html">
* Key/Value Backup</a>.</p>
*
* <p>In versions of the platform lower than Android 8.0 (API level 26),
* a 64-bit number (expressed as a hexadecimal string) that is randomly
* generated when the user first sets up the device and should remain
* constant for the lifetime of the user's device.
*
* On devices that have
* <a href="{@docRoot}about/versions/android-4.2.html#MultipleUsers">
* multiple users</a>, each user appears as a
* completely separate device, so the {@code ANDROID_ID} value is
* unique to each user.</p>
*
* <p class="note"><strong>Note:</strong> If the caller is an Instant App the ID is scoped
* to the Instant App, it is generated when the Instant App is first installed and reset if
* the user clears the Instant App.
*/