- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 919
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />* 22023-04-04 UPDATE * And service:
<service android:name=".MyService" android:enabled="true" android:exported="true"/>22023-04-04 * ENDOFUPDATE * Then in service, in my example that is app\src\main\java\com\milosev\startforegroundserviceandbroadcastreceiver\MyService.kt, override onCreate, and the code so that onCreate looks like:
override fun onCreate() { super.onCreate() sendBroadcastMessage("test") val channelId = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { createNotificationChannel("my_service", "My Background Service") } else { // If earlier version channel ID is not used // https://developer.android.com/reference/android/support/v4/app/NotificationCompat.Builder.html#NotificationCompat.Builder(android.content.Context) "" } val notificationBuilder = NotificationCompat.Builder(this, channelId) val notification = notificationBuilder.setOngoing(true) .setContentTitle("test") .setContentText("test") .setSmallIcon(R.mipmap.ic_launcher) .setPriority(1) .setCategory(Notification.CATEGORY_SERVICE) .build() startForeground(101, notification) }Where sendBroadcastMessage looks like:
private fun sendBroadcastMessage(message: String) { val intent = Intent("") intent.putExtra("message", message) LocalBroadcastManager.getInstance(this).sendBroadcast(intent) }and createNotificationChannel:
@RequiresApi(Build.VERSION_CODES.O) private fun createNotificationChannel(channelId: String, channelName: String): String { val chan = NotificationChannel( channelId, channelName, NotificationManager.IMPORTANCE_NONE ) chan.lightColor = Color.RED chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE val service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager service.createNotificationChannel(chan) return channelId }Now MyService.kt looks like:
package com.milosev.startforegroundserviceandbroadcastreceiver import android.app.Notification import android.app.NotificationChannel import android.app.NotificationManager import android.app.Service import android.content.Context import android.content.Intent import android.graphics.Color import android.location.Location import android.os.Build import android.os.IBinder import androidx.annotation.RequiresApi import androidx.core.app.NotificationCompat import androidx.localbroadcastmanager.content.LocalBroadcastManager class MyService : Service() { override fun onBind(intent: Intent): IBinder { TODO("Return the communication channel to the service.") } override fun onCreate() { super.onCreate() sendBroadcastMessage("test") val channelId = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { createNotificationChannel("my_service", "My Background Service") } else { // If earlier version channel ID is not used // https://developer.android.com/reference/android/support/v4/app/NotificationCompat.Builder.html#NotificationCompat.Builder(android.content.Context) "" } val notificationBuilder = NotificationCompat.Builder(this, channelId) val notification = notificationBuilder.setOngoing(true) .setContentTitle("test") .setContentText("test") .setSmallIcon(R.mipmap.ic_launcher) .setPriority(1) .setCategory(Notification.CATEGORY_SERVICE) .build() startForeground(101, notification) } @RequiresApi(Build.VERSION_CODES.O) private fun createNotificationChannel(channelId: String, channelName: String): String { val chan = NotificationChannel( channelId, channelName, NotificationManager.IMPORTANCE_NONE ) chan.lightColor = Color.RED chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE val service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager service.createNotificationChannel(chan) return channelId } private fun sendBroadcastMessage(message: String) { val intent = Intent("") intent.putExtra("message", message) LocalBroadcastManager.getInstance(this).sendBroadcast(intent) } }In MainActivity.kt in onCreate I have added:
override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val broadCastReceiver = object : BroadcastReceiver() { override fun onReceive(contxt: Context?, intent: Intent?) { val textView = findViewById<TextView>(R.id.textView) textView.text = "test" } } LocalBroadcastManager.getInstance(this) .registerReceiver(broadCastReceiver, IntentFilter("")) }Button click function should look like:
@RequiresApi(Build.VERSION_CODES.O) fun startForegroundServiceAndBroadcastReceiverClick(view: View) { val intent = Intent(this,MyService::class.java) startForegroundService(intent) }At the end MainActivity.kt looks like:
package com.milosev.startforegroundserviceandbroadcastreceiver import android.app.Notification import android.content.BroadcastReceiver import android.content.Context import android.content.Intent import android.content.IntentFilter import android.os.Build import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.view.View import android.widget.TextView import androidx.annotation.RequiresApi import androidx.localbroadcastmanager.content.LocalBroadcastManager class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val broadCastReceiver = object : BroadcastReceiver() { override fun onReceive(contxt: Context?, intent: Intent?) { val textView = findViewById<TextView>(R.id.textView) textView.text = "test" } } LocalBroadcastManager.getInstance(this) .registerReceiver(broadCastReceiver, IntentFilter("")) } @RequiresApi(Build.VERSION_CODES.O) fun startForegroundServiceAndBroadcastReceiverClick(view: View) { val intent = Intent(this,MyService::class.java) startForegroundService(intent) } }Please notice in MyService.kt line of code:
val intent = Intent("")and in MainActivity.kt
LocalBroadcastManager.getInstance(this) .registerReceiver(broadCastReceiver, IntentFilter(""))Otherwise if I want to filter my messages I could instead write MainActivity.kt:
val broadCastReceiver = object : BroadcastReceiver() { override fun onReceive(contxt: Context?, intent: Intent?) { when (intent?.action) { "testFilter" -> { val textView = findViewById<TextView>(R.id.textView) textView.text = "test" } } } } LocalBroadcastManager.getInstance(this) .registerReceiver(broadCastReceiver, IntentFilter("testFilter"))and in MyService.kt:
private fun sendBroadcastMessage(message: String) { val intent = Intent("testFilter") intent.putExtra("message", message) LocalBroadcastManager.getInstance(this).sendBroadcast(intent) }2023-04-04 Update: \app\src\main\AndroidManifest.xml looks like:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"> <uses-permission android:name="android.permission.FOREGROUND_SERVICE" /> <application android:allowBackup="true" android:dataExtractionRules="@xml/data_extraction_rules" android:fullBackupContent="@xml/backup_rules" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/Theme.Startforegroundserviceandbroadcastreceiver" tools:targetApi="31"> <service android:name=".MyService" android:enabled="true" android:exported="true"/> <activity android:name=".MainActivity" android:exported="true"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>\app\src\main\res\layout\activity_main.xml:
<?xml version="1.0" encoding="utf-8"?> <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" tools:context=".MainActivity"> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="@+id/btnStart" app:layout_constraintEnd_toEndOf="@+id/btnStart" app:layout_constraintStart_toStartOf="@+id/btnStart" app:layout_constraintTop_toTopOf="parent" /> <Button android:id="@+id/btnStart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="startForegroundServiceAndBroadcastReceiverClick" android:text="@string/start" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/textView" app:layout_constraintVertical_bias="0.726" /> </androidx.constraintlayout.widget.ConstraintLayout>
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 688
First I have added fusedLocationClient as private member variable:
private lateinit var fusedLocationClient: FusedLocationProviderClientWhere FusedLocationProviderClient is imported from:
implementation 'com.google.android.gms:play-services-location:19.0.1'In onCreate I have initialized fusedLocationClient:
override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) }I need line like
fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, Looper.getMainLooper())For that I need locationRequest and locationCallback
Both locationRequest and locationCallback I have declared as member variables:
private lateinit var locationCallback: LocationCallback private lateinit var locationRequest: LocationRequestlocationRequest:
locationRequest = LocationRequest.create().apply { interval = 5000 fastestInterval = 50000 smallestDisplacement = 170f // 170 m = 0.1 mile priority = LocationRequest.PRIORITY_HIGH_ACCURACY }locationCallback:
locationCallback = object : LocationCallback() { override fun onLocationResult(locationResult: LocationResult) { locationResult ?: return if (locationResult.locations.isNotEmpty()) { // get latest location val location = locationResult.lastLocation if (location != null) { println(location.latitude.toString()) println(location.longitude.toString()) } } } }In app\src\main\AndroidManifest.xml I have added permissions:
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />And check for permission:
if (ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) { if (ActivityCompat.shouldShowRequestPermissionRationale( this as Activity, Manifest.permission.ACCESS_FINE_LOCATION ) ) { return } else { ActivityCompat.requestPermissions( this, arrayOf( Manifest.permission.ACCESS_FINE_LOCATION, ) , 99 ) } }At the end my MainActivity.kt looks like:
package com.milosev.requestlocationupdates import android.Manifest import android.app.Activity import android.content.pm.PackageManager import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.os.Looper import android.view.View import androidx.core.app.ActivityCompat import com.google.android.gms.location.* class MainActivity : AppCompatActivity() { private lateinit var fusedLocationClient: FusedLocationProviderClient private lateinit var locationCallback: LocationCallback private lateinit var locationRequest: LocationRequest override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) } fun requestLocationUpdatesClick(view: View) { if (ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) { if (ActivityCompat.shouldShowRequestPermissionRationale( this as Activity, Manifest.permission.ACCESS_FINE_LOCATION ) ) { return } else { ActivityCompat.requestPermissions( this, arrayOf( Manifest.permission.ACCESS_FINE_LOCATION, ) , 99 ) } } locationRequest = LocationRequest.create().apply { interval = 5000 fastestInterval = 50000 smallestDisplacement = 170f // 170 m = 0.1 mile priority = LocationRequest.PRIORITY_HIGH_ACCURACY } locationCallback = object : LocationCallback() { override fun onLocationResult(locationResult: LocationResult) { locationResult ?: return if (locationResult.locations.isNotEmpty()) { // get latest location val location = locationResult.lastLocation if (location != null) { println(location.latitude.toString()) println(location.longitude.toString()) } } } } fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, Looper.getMainLooper()) } }
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 690
private fun writeFileOnInternalStorage(mcoContext: Context, sFileName: String?, sBody: String?) { val dir = File(mcoContext.getFilesDir(), "mydir") if (!dir.exists()) { dir.mkdir() } try { val gpxfile = File(dir, sFileName) val writer = FileWriter(gpxfile) writer.append(sBody) writer.flush() writer.close() } catch (e: Exception) { e.printStackTrace() } }
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 861
<?xml version="1.0" encoding="utf-8"?> <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" tools:context=".MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" android:onClick="getGps" tools:layout_editor_absoluteX="166dp" tools:layout_editor_absoluteY="441dp" /> </androidx.constraintlayout.widget.ConstraintLayout>In build.gradle as I already explained here I have added Google Play services com.google.android.gms.location like this:
implementation 'com.google.android.gms:play-services-location:19.0.1'Now my build.gradle looks like:
plugins { id 'com.android.application' id 'org.jetbrains.kotlin.android' } android { compileSdk 32 defaultConfig { applicationId "com.milosev.getgpslocation" minSdk 21 targetSdk 32 versionCode 1 versionName "1.0" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } kotlinOptions { jvmTarget = '1.8' } } dependencies { implementation 'androidx.core:core-ktx:1.7.0' implementation 'androidx.appcompat:appcompat:1.4.1' implementation 'com.google.android.material:material:1.5.0' implementation 'androidx.constraintlayout:constraintlayout:2.1.3' implementation 'com.google.android.gms:play-services-location:19.0.1' testImplementation 'junit:junit:4.13.2' androidTestImplementation 'androidx.test.ext:junit:1.1.3' androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0' }In Android -> app -> manifests -> AndroidManifest.xml I added permissions like:
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />In order to request permission I In Project -> app -> src -> main -> java -> com -> milosev -> getgpslocation -> MainActivity.kt I wrote:
if (ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) { if (ActivityCompat.shouldShowRequestPermissionRationale( this, Manifest.permission.ACCESS_FINE_LOCATION ) ) { return } else { // No explanation needed, we can request the permission. requestLocationPermission() } }So my whole MainActivity.kt looks like:
package com.milosev.getgpslocation import android.Manifest import android.content.pm.PackageManager import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.view.View import androidx.core.app.ActivityCompat import com.google.android.gms.location.FusedLocationProviderClient import com.google.android.gms.location.LocationServices class MainActivity : AppCompatActivity() { private lateinit var fusedLocationClient: FusedLocationProviderClient override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) } fun getGps(view: View) { if (ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) { if (ActivityCompat.shouldShowRequestPermissionRationale( this, Manifest.permission.ACCESS_FINE_LOCATION ) ) { return } else { // No explanation needed, we can request the permission. requestLocationPermission() } } fusedLocationClient.lastLocation .addOnSuccessListener { location-> if (location != null) { // use your location object // get latitude , longitude and other info from this } } } private fun requestLocationPermission() { ActivityCompat.requestPermissions( this, arrayOf( Manifest.permission.ACCESS_FINE_LOCATION, ), MY_PERMISSIONS_REQUEST_LOCATION ) } companion object { private const val MY_PERMISSIONS_REQUEST_LOCATION = 99 private const val MY_PERMISSIONS_REQUEST_BACKGROUND_LOCATION = 66 } }With piece of code:
fusedLocationClient.lastLocation .addOnSuccessListener { location-> if (location != null) { // use your location object // get latitude , longitude and other info from this }I am actually geting the location.