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Dennis Guse
27 lines
1.5 KiB
Markdown
27 lines
1.5 KiB
Markdown
# OpenTracks Data API
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## Reason
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OpenTracks by itself only provides basic features for data visualization and also lacks functionality for analytics.
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By itself OpenTracks provides a basic dashboard that can show summary of a track (while recording as well as afterwards).
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Although this might be (mostly) sufficient, it has some limitations.
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This include limited configurability (e.g., ordering of shown elements) and the lack of Internet access.
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In fact, the later is considered a feature but severely limits the implementation presenting a map (at least in an easy way).
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For the time being, the OpenTracks Data API can be used to implement mainly custom dashboards.
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## Implementation
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OpenTracks by default does not expose any data to 3rd-party applications.
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On the request of the user (i.e., pressing a button), an Intent is created that exposes the `Track` data (it's summary), the `TrackPoint`s, and the `Waypoint`s of one or more selected tracks.
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For each, one URI is provided.
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These URIs notify observers if on content changes (e.g., a new `TrackPoint` was added).
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Limitations:
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* only tracks selected by the user are exposed,
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* `Waypoints` are not exposed,
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* access is only granted temporarily and automatically revoked (see `FLAG_GRANT_READ_URI_PERMISSION`),
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* no write access is possible, and
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* neither track recordings can be started, paused, or stopped.
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All required information can be found in `IntentDashboardUtils.java`.
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A _reference implementation_ is the [OSMDashboard](https://github.com/OpenTracksApp/OSMDashboard). |