Mapas

Creación de una App de Mapas usando el API de Google Maps

Modificar fichero res/values/google_maps_api.xml (poner API Key)

<resources>
    <string name="google_maps_key" templateMergeStrategy="preserve" translatable="false">AIza . . .</string>
</resources>

Manifiesto

<!--

    The API key for Google Maps-based APIs is defined as a string resource.

    (See the file "res/values/google_maps_api.xml").

    Note that the API key is linked to the encryption key used to sign the APK.

    You need a different API key for each encryption key, including the release key that is used to sign the APK for publishing.

    You can define the keys for the debug and release targets in src/debug/ and src/release/. 

-->


<meta-data

    android:name="com.google.android.geo.API_KEY"

    android:value="@string/google_maps_key" />

MapsActivity.kt

The maps activity java file

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle

import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.MarkerOptions

internal class MapsActivity : AppCompatActivity(), OnMapReadyCallback {

    private lateinit var mMap: GoogleMap

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_maps)
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        val mapFragment = supportFragmentManager
            .findFragmentById(R.id.map) as SupportMapFragment
        mapFragment.getMapAsync(this)
    }

    /**
     * Manipulates the map once available.
     * This callback is triggered when the map is ready to be used.
     * This is where we can add markers or lines, add listeners or move the camera. In this case,
     * we just add a marker near Sydney, Australia.
     * If Google Play services is not installed on the device, the user will be prompted to install
     * it inside the SupportMapFragment. This method will only be triggered once the user has
     * installed Google Play services and returned to the app.
     */
    override fun onMapReady(googleMap: GoogleMap) {
        mMap = googleMap

        // Add a marker in Sydney and move the camera
        val sydney = LatLng(-34.0, 151.0)
        mMap.addMarker(MarkerOptions()
            .position(sydney)
            .title("Marker in Sydney"))
        mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney))
    }
}

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