Benoit Marty
d59120aad0
Synapse deletes sliding sync connections that have been unused for 7 days. When an OEM battery manager has kept the application frozen for longer than that, the next sliding sync request is answered 400 M_UNKNOWN_POS. The Rust SDK handles that: it resets `pos` and, in offline mode, restarts the sync. When that recovery gives up, the sync service ends up in the Error or Terminated state and stops for good, and it is then up to the application to call start() again. Element X iOS does it, we do not: SyncOrchestrator only restarts the sync service when its state is Idle, so the sync stays dead for the rest of the process lifetime. Nothing recovers from there. The sync never reaches Running, so waitForE2eeInitializationTasks() never returns, the session verified status stays Unknown, and the FTUE is stuck on WaitingForInitialState. Clearing the application data is the only workaround. Restart the sync service when it is in the Error or Terminated state, with an exponential backoff from 1s to 30s to avoid hammering a failing homeserver. The backoff is only reset once the sync service has been running for a while, since startSync() moves the state to Running right away. Fixes #7689 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Element X Android
Element X Android is the next-generation Matrix client provided by Element.
Compared to the previous-generation Element Classic, the application is a total rewrite, using the Matrix Rust SDK underneath and targeting devices running Android 7+. The UI layer is written using Jetpack Compose, and the navigation is managed using Appyx.
Table of contents
- Screenshots
- Translations
- Rust SDK
- Status
- Minimum SDK version
- Contributing
- Build instructions
- Support
- Copyright and License
Screenshots
Here are some screenshots of the application:
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Translations
Element X Android supports many languages. You can help us to translate the app in your language by joining our Localazy project. You can also help us to improve the existing translations.
Note that for now, we keep control on the French and German translations.
Translations can be checked screen per screen using our tool Element X Android Gallery, available at https://element-hq.github.io/element-x-android/. Note that this page is updated every Tuesday.
More instructions about translating the application can be found at CONTRIBUTING.md.
Rust SDK
Element X leverages the Matrix Rust SDK through an FFI layer that the final client can directly import and use.
We're doing this as a way to share code between platforms and while we've seen promising results it's still in the experimental stage and bound to change.
Status
This project is actively developed and supported. New users are recommended to use Element X instead of the previous-generation app.
Minimum SDK version
Element X Android requires a minimum SDK version of 24 (Android 7.0, Nougat). We aim to support devices running Android 7.0 and above, which covers a wide range of devices still in use today.
Element Android Enterprise requires a minimum SDK version of 33 (Android 13, Tiramisu). For Element Enterprise, we support only devices that still receive security updates, which means devices running Android 13 and above. Android does not have a documented support policy, but some information can be found at https://endoflife.date/android.
Contributing
Want to get actively involved in the project? You're more than welcome! A good way to start is to check the issues that are labelled with the good first issue label. Let us know by commenting the issue that you're starting working on it.
But first make sure to read our contribution guide first.
You can also come chat with the community in the Matrix room dedicated to the project.
Build instructions
Just clone the project and open it in Android Studio. Make sure to select the
app configuration when building (as we also have sample apps in the project).
To build against a local copy of the Rust SDK, see the Developer onboarding instructions.
Support
When you are experiencing an issue on Element X Android, please first search in GitHub issues and then in #element-x-android:matrix.org. If after your research you still have a question, ask at #element-x-android:matrix.org. Otherwise feel free to create a GitHub issue if you encounter a bug or a crash, by explaining clearly in detail what happened. You can also perform bug reporting from the application settings. This is especially recommended when you encounter a crash.
Copyright and License
Copyright (c) 2025 Element Creations Ltd. Copyright (c) 2022 - 2025 New Vector Ltd.
This software is dual licensed by Element Creations Ltd (Element). It can be used either:
(1) for free under the terms of the GNU Affero General Public License (as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version); OR
(2) under the terms of a paid-for Element Commercial License agreement between you and Element (the terms of which may vary depending on what you and Element have agreed to).
Unless required by applicable law or agreed to in writing, software distributed under the Licenses is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the Licenses for the specific language governing permissions and limitations under the Licenses.