- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 62
private var kmlLayer: KmlLayer? = null ... kmlLayer?.removeLayerFromMap() kmlLayer = KmlLayer(googleMap, input, activity) kmlLayer?.addLayerToMap()
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 93
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<Button
android:id="@+id/btnLoadKml"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Load KML"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_marginBottom="32dp" />
</androidx.constraintlayout.widget.ConstraintLayout>
In gradle "\GoogleMapsTestSandBox\app\build.gradle.kts" add dependency:
implementation("com.google.maps.android:android-maps-utils:3.19.0")
Now, setup view binding as I already explained here, MainActivity I will inherit from OnMapReadyCallback, so now it looks like:
package com.milosev.googlemapstestsandbox
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
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.milosev.googlemapstestsandbox.databinding.ActivityMainBinding
class MainActivity : AppCompatActivity(), OnMapReadyCallback {
private lateinit var binding: ActivityMainBinding
private lateinit var map: GoogleMap
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
val mapFragment = supportFragmentManager
.findFragmentById(R.id.map) as SupportMapFragment
mapFragment.getMapAsync(this)
binding.btnLoadKml.setOnClickListener {
}
}
override fun onMapReady(googleMap: GoogleMap) {
map = googleMap
val tunis = LatLng(36.8065, 10.1815)
map.moveCamera(CameraUpdateFactory.newLatLngZoom(tunis, 8f))
}
}
setOnClickListener is empty, here I will add:
val loadKml = LoadKml() loadKml.execute(this, map)Since my KML is too big, I had to extend timeouts, and first I am saving in into temp file, so class LoadKml will look like this:
package com.milosev.googlemapstestsandbox
import android.content.Context
import android.widget.Toast
import com.google.android.gms.maps.GoogleMap
import com.google.maps.android.data.kml.KmlLayer
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import java.io.File
import java.io.FileInputStream
import java.net.URL
class LoadKml {
fun execute(activity: Context, map: GoogleMap) {
CoroutineScope(Dispatchers.IO).launch {
try {
val url =
URL("https://www.milosev.com/gallery/allWithPics/travelBuddies/tunis/kml/kml.kml")
val connection = url.openConnection()
connection.connectTimeout = 15000
connection.readTimeout = 60000
val tempFile = File(activity.cacheDir, "temp.kml")
connection.getInputStream().use { input ->
tempFile.outputStream().use { output ->
input.copyTo(output)
}
}
withContext(Dispatchers.Main) {
val layer = KmlLayer(map, FileInputStream(tempFile), activity)
layer.addLayerToMap()
Toast.makeText(activity, "KML Loaded", Toast.LENGTH_LONG).show()
}
} catch (e: Exception) {
withContext(Dispatchers.Main) {
Toast.makeText(activity, "Error: ${e.message}", Toast.LENGTH_LONG).show()
}
}
}
}
}
Part:
val tempFile = File(activity.cacheDir, "temp.kml")
connection.getInputStream().use { input ->
tempFile.outputStream().use { output ->
input.copyTo(output)
}
}
is maybe not needed, I was testing of loading big KML files.
Example download from here.
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 118
dependencies {
implementation(libs.androidx.core.ktx)
implementation(libs.androidx.appcompat)
implementation(libs.material)
implementation(libs.androidx.activity)
implementation(libs.androidx.constraintlayout)
testImplementation(libs.junit)
androidTestImplementation(libs.androidx.junit)
androidTestImplementation(libs.androidx.espresso.core)
implementation("com.google.android.gms:play-services-maps:19.2.0")
}
Since I don't want to make google maps key public, I will add "secrets" file. To do it, first I wil add id("com.google.android.libraries.mapsplatform.secrets-gradle-plugin") version "2.0.1" plugin in gradle "\GoogleMapsTestSandBox\app\build.gradle.kts":
plugins {
alias(libs.plugins.android.application)
alias(libs.plugins.kotlin.android)
id("com.google.android.libraries.mapsplatform.secrets-gradle-plugin") version "2.0.1"
}
Before I sync my gradle, I need to add two files local.defaults.properties and secrets.properties.
local.defaults.properties:
MAPS_API_KEY=DEFAULT_API_KEYsecrets.properties:
sdk.dir=C\:\\Users\\smilosev\\AppData\\Local\\Android\\Sdk MAPS_API_KEY=myMapsApiKey;Now in "\GoogleMapsTestSandBox\app\src\main\AndroidManifest.xml" add:
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="${MAPS_API_KEY}" />
Since in this example I just want to display google maps my "\GoogleMapsTestSandBox\app\src\main\res\layout\activity_main.xml" will look like:
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
For this, simplest example my "\GoogleMapsTestSandBox\app\src\main\java\com\milosev\googlemapstestsandbox\MainActivity.kt" will look like:
package com.milosev.googlemapstestsandbox
import android.os.Bundle
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
enableEdgeToEdge()
setContentView(R.layout.activity_main)
}
}
Example download from here.
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 88
<receiver android:name=".SeparateClassReceiverExample" android:enabled="true" android:exported="false"> </receiver>Where my class SeparateClassReceiverExample looks like:
class SeparateClassReceiverExample : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent?) {
val msg = intent?.getStringExtra("message")
}
}
To send messages from separate foreground service I am using this code:
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
val context = this
when (intent?.action) {
IntentGlobalActions.START_FOREGROUND_SERVICE -> {
...
val serviceIntent = Intent(context, SeparateClassReceiverExample::class.java)
serviceIntent.putExtra("message", "Message number: $messageNumber")
sendBroadcast(serviceIntent)
}
notice line:
val context = thisNext problem is to update ui, this is why now my receiver will look like:
class SeparateClassReceiverExample : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent?) {
val msg = intent?.getStringExtra("message")
val tickIntent = Intent(IntentGlobalActions.UI_UPDATE)
tickIntent.setPackage(context.packageName)
tickIntent.putExtra("message", msg)
context.sendBroadcast(tickIntent)
}
}
In MainActivity.kt I wrote:
private val uiReceiver = object : BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
val msg = intent?.getStringExtra("message")
if (msg != null) appendLog(msg)
}
}
and
registerReceiver(uiReceiver, IntentFilter(IntentGlobalActions.UI_UPDATE), RECEIVER_NOT_EXPORTED)
unregisterReceiver(uiReceiver)Example download from here.