Examine the code supplied by the template. In particular, look at the following files in your Android Studio project. The maps activity file is the main activity for the app, and contains the code to manage and display the map. By default, the file that defines the activity is named MapsActivity.
The SupportMapFragment object manages the life cycle of the map and is the parent element of the app's UI. The GoogleMap object provides access to the map data and view. The first settings to configure when adding a map are usually the map location and camera settings; such as viewing angle, map orientation, and zoom level.
See the Camera and View guide for details. The addMarker function adds a marker to the coordinates for Sydney. See the Markers guide for details. Java import android. Bundle; import androidx. AppCompatActivity; import com. CameraUpdateFactory; import com. GoogleMap; import com. OnMapReadyCallback; import com.
SupportMapFragment; import com. LatLng; import com. AppCompatActivity import android. Bundle import com. CameraUpdateFactory import com. GoogleMap import com. OnMapReadyCallback import com. SupportMapFragment import com. LatLng import com. The app-level build. To learn more about managing the Maps dependency, see Versioning. Click the Cancel button to stop the operation. The button changes to a Cancelling message and then to Cancelled when the operation stops completely.
Use the operations cancel command to stop an operation in progress:. Cancelling a running operation does not undo the operation. A cancelled export operation will leave documents already exported in Cloud Storage, and a cancelled import operation will leave in place updates already made to your database.
You cannot import a partially completed export. Use the gcloud firestore operations delete command to remove an operation from the list of recent operations. This command will not delete export files from Cloud Storage. You are required to enable billing for your Google Cloud project before you use the managed export and import service.
Export and import operations are charged for document reads and writes at the rates listed in Cloud Firestore pricing. The costs of export and import operations do not count towards your spending limit. Export or import operations will not trigger your Google Cloud budget alerts until after completion.
Similarly, reads and writes performed during an export or import operation are applied to your daily quota after the operation is complete. Export and import operations will not affect the usage shown in the usage section of the console. Export and import operations apply the goog-firestoremanaged:exportimport label to billed operations.
In the Cloud Billing reports page , you can use this label to view costs related to import and export operations:. You can load data from a Cloud Firestore export into BigQuery, but only if you specified a collection-ids filter. See Loading data from Cloud Firestore exports. BigQuery imposes a limit of 10, columns per table. Cloud Firestore export operations generate a BigQuery table schema for each collection group. In this schema, each unique field name within a collection group becomes a schema column.
If a collection group's BigQuery schema surpasses 10, columns, the Cloud Firestore export operation attempts to stay under the column limit by treating map fields as bytes. If this conversion brings the number of columns below 10,, you can load the data into BigQuery, but you cannot query the subfields within the map fields. If the number of columns still exceeds 10,, the export operation does not generate a BigQuery schema for the collection group and you cannot load its data into BigQuery.
The output of a managed export uses the LevelDB log format. An export operation creates a metadata file for each collection group you specify. The metadata files are protocol buffers and you can decode them with the protoc protocol compiler. For example, you can decode a metadata file to determine the collection groups the export files contain:.
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