Preferred Sources
X
Mail

Android Quick Share App Teardown Points to Upcoming Background Auto-Sync Feature

Android GMS app-teardown
この記事のポイント
  • Android’s nearby sharing feature, “Quick Share,” is expected to receive a new “File Sync” feature that automatically syncs files in the background without needing to specify a destination device.
  • An analysis of the app files from the Android “Google Play services” app v26.30 update, released on August 3, 2026, confirmed the addition of resource codes related to the “File Sync” feature, designed to automatically sync files in the background using “Quick Share.”
  • By pre-configuring permitted devices for synchronization and the sync range, files will automatically sync with those devices within the specified range moving forward.

Android’s nearby sharing feature, “Quick Share” (formerly Nearby Share), now even supports file sharing between iOS devices and select Android devices.

With “Quick Share,” if the devices are owned by the same user and logged into the same Google Account—such as across Android, ChromeOS, and Windows devices—the sender can unilaterally initiate a file transfer. However, as mentioned, this is strictly limited to devices logged into the same Google Account.

That is about to change, as it appears Android’s “Quick Share” will soon introduce a “File Sync” feature that automatically syncs files in the background without requiring the user to specify a destination device. This possibility was brought to light through our original content series, “App Analysis.”

「アプリ解析」

当サイトの「アプリ解析」カテゴリで公開している記事では、最新 Android アプリを逆コンパイルして独自に解析し、今後実装される可能性のある新機能や変更点などをお届けします。正式リリース前の新機能や変更となるため開発段階の未確定な情報も含まれますが、Android アプリの今後のアップデート動向をいち早くキャッチできる、ほかにはない当サイトオリジナルコンテンツです。

当サイトオリジナルの「アプリ解析」コンテンツを見逃さないよう、ぜひ Google の「優先ソース」に当サイト「Jetstream 」を登録してください。

Google 優先ソースに「Jetstream」を登録

An analysis of the app files from the Android “Google Play services” app v26.30 update, released on Monday, August 3, 2026, confirmed the addition of resource codes for a “File Sync” feature that utilizes “Quick Share” for automatic background file synchronization. Given that this “File Sync” feature includes a consent activity (“FileSyncConsentActivity”) and a settings intent (“com.google.android.gms.settings.sharing.FILE_SYNC_SETTINGS”), it is expected to function by allowing users to pre-define sync-permitted devices and ranges, after which files will automatically sync within those parameters.

This will likely enable automatic background synchronization not only between devices sharing the same Google Account, but potentially between devices with different Google Accounts as well.

<activity
    android:theme="@style/Theme.Sharing.CardActivity"
    android:label="@string/sharing_product_name_v3"
    android:icon="@mipmap/adaptiveproduct_quick_share_launcher"
    android:name="com.google.android.gms.nearby.sharing.main.filesync.FileSyncConsentActivity"
    android:enabled="false"
    android:exported="false"
    android:process="@string/common_ui_process"
    android:finishOnTaskLaunch="true"
    android:clearTaskOnLaunch="true"
    android:excludeFromRecents="true"
    android:launchMode="singleInstance"
    android:filterTouchesWhenObscured="true"
    android:documentLaunchMode="never"
    android:relinquishTaskIdentity="true"
    android:resizeableActivity="true"
    android:supportsPictureInPicture="false"/>
<activity-alias
    android:label="@string/sharing_product_name_v3"
    android:icon="@drawable/sharing_ic_v3"
    android:name="com.google.android.gms.nearby.sharing.main.SettingsMainActivity"
    android:enabled="false"
    android:exported="true"
    android:targetActivity="com.google.android.gms.nearby.sharing.main.MainActivity">
    <intent-filter>
        <action android:name="com.google.android.gms.settings.SHARING"/>
        <action android:name="com.google.android.gms.settings.sharing.FILE_SYNC_SETTINGS"/>
        <category android:name="android.intent.category.DEFAULT"/>
    </intent-filter>
    ...
</activity-alias>
<drawable name="quickshare_filesync">@drawable/gs_quick_share_vd_24</drawable>
<plurals name="nearby_sharing_file_sync_subtitle">
    <item quantity="one">%1$d item • %2$s</item>
    <item quantity="other">%1$d items • %2$s</item>
</plurals>

The new “File Sync” automatic file synchronization feature discovered in “Quick Share” shares similarities with folder-specific syncing in Google Drive or the new “Local file backup (documents)” feature recently rolled out to Android devices. However, because it leverages “Quick Share,” it is expected to enable automatic syncing even offline, for instance. While a rollout has not yet been confirmed, it promises to be an extremely practical feature once released.

Google Play Services App Link

Get it on Google Play

*This site uses affiliate advertising.