Spatia-Room is a bridge between Room Android Database and Spatialite.
- Add Room dependencies
- Add Spatia-room dependency
- Creates database using SpatiaRoom Builder
- Creates Dao with Geo Queries
- Create Geometry columns in your model and use GeometryConverters to map them to Kotlin objects
- Add Jitpack Repository
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
- Add dependency
Please check which android room version are you using and select the perfect fit for you with SpatiaRoom.
- Which version use?
Room | SpatiaRoom |
---|---|
2.3.0 | 0.2.3 |
>= 2.4.2 < 2.5.0 | 0.2.4 |
>= 2.5.0 | 0.2.5 |
- Android Room >= 2.5.0
dependencies {
implementation 'com.github.anboralabs:spatia-room:0.2.5'
}
- Android Room >= 2.4.2 < 2.5.0
dependencies {
implementation 'com.github.anboralabs:spatia-room:0.2.4'
}
- Android Room < 2.3.0
dependencies {
implementation 'com.github.anboralabs:spatia-room:0.1.1'
}
val instance = SpatiaRoom.databaseBuilder(
context.applicationContext,
AppDatabase::class.java,
DB_NAME
).build()
The db template must be a spatialite db, if you want to use geo functions.
val instance = SpatiaRoom.databaseBuilder(
context.applicationContext,
AppDatabase::class.java,
DB_NAME
).createFromAsset("my_template.db")
.build()
- Mark each geo-spatial queries with
@SkipQueryVerification
import androidx.room.*
import co.anbora.labs.spatiaroom.data.model.Post
import kotlinx.coroutines.flow.Flow
@Dao
interface PostsDao {
@Insert(onConflict = OnConflictStrategy.REPLACE)
fun insertPosts(posts: List<Post>)
@Query("SELECT spatialite_version()")
@SkipQueryVerification
fun getSpatiaVersion(): String
@Query("SELECT proj4_version()")
@SkipQueryVerification
fun getProj4Version(): String
@Query("SELECT geos_version()")
@SkipQueryVerification
fun getGeosVersion(): String
@Query("""
SELECT ASText(
MakePolygon(
GeomFromText('LINESTRING(0 0, 100 0, 100 100, 0 100, 0 0)')
)
) as line
""")
@SkipQueryVerification
fun getMakePolyline(): String
@Query("""
SELECT ST_Distance(
Transform(MakePoint(-72.1235, 42.3521, 4326), 26986),
Transform(MakePoint(-71.1235, 42.1521, 4326), 26986)
) as distance
""")
@SkipQueryVerification
fun getDistance(): Double
@Query("DELETE FROM ${Post.TABLE_NAME}")
fun deleteAllPosts()
@Query("SELECT * FROM ${Post.TABLE_NAME} WHERE ID = :postId")
fun getPostById(postId: Int): Flow<Post>
@Query("SELECT * FROM ${Post.TABLE_NAME}")
fun getAllPosts(): Flow<List<Post>>
@Query("SELECT * FROM ${Post.TABLE_NAME}")
fun getAllPostsList(): List<Post>
}
There is a very simple and useless example in the demo
module.
Simply: Spatialite = SQLite + advanced geospatial support.
Spatialite
is a geospatial extension to SQLite. It is a set of few libraries written in C
to extend SQLite with geometry data types and many
SQL functions
above geometry data. For more info: https://www.gaia-gis.it/gaia-sins/
Yes - http://www.gaia-gis.it/gaia-sins/spatialite-sql-4.4.0.html
No. It uses cursors - the suggested lightweight approach to access SQL used in the Android platform instead of the heavier JDBC.
Yes. It builds for arm64-v8a
and x86_64
. mips64
is not tested.
The main ideas used here were borrowed from:
- https://github.com/sevar83/android-spatialite
- https://github.com/commonsguy/cwac-saferoom
MIT License
Copyright (c) 2020 Anbora Labs
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.