Develop Reference

how to implemment auto detect otp using firebase?

I have implemented OTP verification using firebase,now I want add auto-detect OTP verification functionality in tha. But before autodetect app should ask about the permission for auto detect. How to do that?

Here You Go
in gradle
implementation 'com.google.android.gms:play-services-auth:20.1.0'
implementation 'com.google.android.gms:play-services-auth-api-phone:18.0.1'
class SMSReceiver : BroadcastReceiver() {
private var otpListener: OTPReceiveListener? = null
fun setOTPListener(otpListener: OTPReceiveListener?) {
this.otpListener = otpListener
}
override fun onReceive(context: Context, intent: Intent) {
if (intent.action == SmsRetriever.SMS_RETRIEVED_ACTION) {
val extras = intent.extras
val status = extras!![SmsRetriever.EXTRA_STATUS] as Status?
when (status!!.statusCode) {
CommonStatusCodes.SUCCESS -> {
val sms = extras[SmsRetriever.EXTRA_SMS_MESSAGE] as String?
sms?.let {
val p = Pattern.compile("\\d+")
val m = p.matcher(it)
if (m.find()) {
val otp = m.group()
if (otpListener != null) {
otpListener!!.onOTPReceived(otp)
}
}
}
}
}
}
}
interface OTPReceiveListener {
fun onOTPReceived(otp: String?)
}
}
Manifest
<receiver
android:name=".SMSReceiver"
android:exported="true"
android:permission="com.google.android.gms.auth.api.phone.permission.SEND">
<intent-filter>
<action android:name="com.google.android.gms.auth.api.phone.SMS_RETRIEVED" />
</intent-filter>
</receiver>

Kotlin: Starting service after BroadcastReceiver not working

I`m trying to build a service that detects if the screen of a device is locked/unlocked (which I will later user as a native module in React). However, it seems like my service is not starting, and I don't receive the expected logs. Where is my mistake? (It's my first time dealing with native android & Kotlin, so apologies if this is a dumb question, and duplicates were related to java code)..
I have defined a Broadcast Receiver for each event here:
ScreenOnReceiver.kt
class screenOnReceiver: BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
if(intent!!.action == Intent.ACTION_SCREEN_ON) {
val screenOff = false
val i = Intent(context, PowerButtonService::class.java)
i.putExtra("screenState", screenOff)
context!!.startService(i)
}
}
}
ScreenOffReceiver.kt
class screenOffReceiver: BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
if(intent!!.action == Intent.ACTION_SCREEN_ON) {
val screenOff = false
val i = Intent(context, PowerButtonService::class.java)
i.putExtra("screenState", screenOff)
context!!.startService(i)
}
}
}
ScreenChangeService.kt:
class ScreenChangeService: Service() {
override fun onBind(p0: Intent?): IBinder? = null
override fun onCreate() {
val screenOnReceiver = screenONReceiver()
val screenOnFilter = IntentFilter(Intent.ACTION_SCREEN_ON)
registerReceiver(screenOnReceiver, screenOnFilter)
val screenOffReceiver = screenOffReceiver()
val screenOffFilter = IntentFilter(Intent.ACTION_SCREEN_OFF)
registerReceiver(screenOffreceiver, screenOffFilter)
}
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
val screenState = intent!!.getBooleanExtra("screenState", false)
if (screenState == true) {
Log.d("TAG", "Screen On")
} else {
Log.d("TAG", "Screen Off")
}
return START_NOT_STICKY
}
}
Manifest.xml
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.Test">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".PowerButtonService"/>
</application>

Android SIP API - Receive Incoming Call

I creating softphone application using Android SIP API (https://developer.android.com/guide/topics/connectivity/sip) and I have successfully registered to my Asterisk server and I can call another peer on another softphone. I can hear voice on both sides and everything works perfect.
Now, I have problem receiving call from another softphone. onRinging method is never executed. On the other softphone I am getting status RINGING, but in my app that call is never received.
I have created IncomingCallReceiver class and also WalkieTalkieActivity, but none of them is doing its job (most probably I am doing something wrong, or I did not initiate some of them, or call or whatever...).
I am stuck on receiving the calls. Also the official documentation is not clear to me.
If there is anyone here to help me and guide me to the solution, I would be very grateful.
Here is my MainActivity class:
class MainActivity: FlutterActivity() {
var mSipProfile: SipProfile? = null
var username: String? = "..." //I have it correct in my code
var password: String? = "..." //I have it correct in my code
var domain: String? = "..." //I have it correct in my code
var builder: SipProfile.Builder? = SipProfile.Builder(username, domain).setPassword(password)
private val CHANNEL = "samples.flutter.dev/registration"
private val mSipManager: SipManager? by lazy(LazyThreadSafetyMode.NONE) {
SipManager.newInstance(this)
}
override fun onStart() {
super.onStart()
println("SSSSSTTTTTTTTAAAAAAAAAAARRRRRRRRRRRRRTTTTTTTTTTTTTTTTTTT")
}
override fun onCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) {
super.onCreate(savedInstanceState, persistentState)
println("CCCCCCCCRRRRRREEEEEEEEEAAAAAAATTTTTTTTEEEEEEEEEEEEEEEEEEEEEE")
}
private var listenSipSession: SipSession.Listener = object : SipSession.Listener() {
override fun onRinging(session: SipSession?, caller: SipProfile?, sessionDescription: String?) {
super.onRinging(session, caller, sessionDescription)
println("EVVVVVVVOOOOOOOOOOOOOOOO GAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA")
}
}
private var listener: SipAudioCall.Listener = object : SipAudioCall.Listener() {
override fun onCalling(call: SipAudioCall?) {
super.onCalling(call)
println("111111 CALLING CALLING CALLING")
}
override fun onChanged(call: SipAudioCall?) {
super.onChanged(call)
println("CHANGED")
println(call?.state)
}
override fun onError(call: SipAudioCall?, errorCode: Int, errorMessage: String?) {
super.onError(call, errorCode, errorMessage)
println("ERROR ERROR ERROR")
}
override fun onRingingBack(call: SipAudioCall?) {
super.onRingingBack(call)
println("RINGING BACK")
}
/*override fun onRinging(call: SipAudioCall, caller: SipProfile) {
println("RINGING")
try {
call.answerCall(30)
} catch (e: Exception) {
println("ERROR 2: $e")
e.printStackTrace()
}
}*/
override fun onCallEstablished(call: SipAudioCall) {
println("Call established")
call.apply {
startAudio()
setSpeakerMode(false)
// toggleMute()
}
}
override fun onRinging(call: SipAudioCall?, caller: SipProfile?) {
super.onRinging(call, caller)
println("Ringing")
}
override fun onCallEnded(call: SipAudioCall) {
println("Call ended " + call.state)
}
}
override fun onDestroy() {
super.onDestroy()
closeLocalProfile()
}
override fun configureFlutterEngine(#NonNull flutterEngine: FlutterEngine) {
super.configureFlutterEngine(flutterEngine)
MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
// Note: this method is invoked on the main thread.
mSipProfile = builder?.build()
val intent = Intent("com.example.softphone.INCOMING_CALL")
val pendingIntent: PendingIntent = PendingIntent.getBroadcast(this, 0, intent, Intent.FILL_IN_DATA)
mSipManager?.open(mSipProfile, pendingIntent, null)
if (call.method == "register") {
val registrationStatus = register()
result.success(registrationStatus)
}
if (call.method == "call") {
call()
}
}
}
private fun closeLocalProfile() {
try {
mSipManager?.close(mSipProfile?.uriString)
println("Local profile closed.")
} catch (ee: Exception) {
println("WalkieTalkieActivity/onDestroy. Failed to close local profile.")
}
}
///Method for making call
private fun call(): String {
var status = "Unknown"
try {
println("Making call")
status = "In Call"
val call: SipAudioCall? = mSipManager?.makeAudioCall(
mSipProfile?.uriString,
"...", //I have it correct in my code
listener,
30
)
println(call)
} catch (e: SipException) {
e.printStackTrace()
println(e)
}
return status
}
///Method for registering user
private fun register(): String {
var status = "Unknown"
try {
mSipManager?.setRegistrationListener(mSipProfile?.uriString, object : SipRegistrationListener {
override fun onRegistering(localProfileUri: String) {
status = "Registering with SIP Server..."
println(status)
}
override fun onRegistrationDone(localProfileUri: String, expiryTime: Long) {
status = "Ready"
println(status)
}
override fun onRegistrationFailed(
localProfileUri: String,
errorCode: Int,
errorMessage: String
) {
status = "Registration failed. Please check settings."
println(status)
}
})
} catch (e: SipException) {
e.printStackTrace()
println(e)
}
return status
}
}
Here is my IncomingCallReceiver class:
class IncomingCallReceiver : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent?) {
var incomingCall: SipAudioCall? = null
try {
val listener: SipAudioCall.Listener = object : SipAudioCall.Listener() {
override fun onRinging(call: SipAudioCall, caller: SipProfile) {
try {
call.answerCall(30)
} catch (e: Exception) {
e.printStackTrace()
}
}
}
val wtActivity: WalkieTalkieActivity = context as WalkieTalkieActivity
incomingCall = wtActivity.manager?.takeAudioCall(intent, listener)
incomingCall?.setListener(listener)
incomingCall?.answerCall(30)
incomingCall?.startAudio()
incomingCall?.setSpeakerMode(true)
if (incomingCall?.isMuted!!) {
incomingCall?.toggleMute()
}
} catch (e: Exception) {
incomingCall?.close()
}
}
}
Here is my WalkieTalkieActivity class:
class WalkieTalkieActivity : Activity(), OnTouchListener {
var sipAddress: String? = null
var manager: SipManager? = null
var me: SipProfile? = null
var call: SipAudioCall? = null
lateinit var callReceiver: IncomingCallReceiver
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val filter = IntentFilter().apply {
addAction("com.example.softphone.INCOMING_CALL")
}
callReceiver = IncomingCallReceiver()
this.registerReceiver(callReceiver, filter)
}
override fun onTouch(p0: View?, p1: MotionEvent?): Boolean {
TODO("Not yet implemented")
}
}
Here is my AndroidManifest file:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.softphone">
<!-- io.flutter.app.FlutterApplication is an android.app.Application that
calls FlutterMain.startInitialization(this); in its onCreate method.
In most cases you can leave this as-is, but you if you want to provide
additional functionality it is fine to subclass or reimplement
FlutterApplication and put your custom class here. -->
<uses-permission android:name="android.permission.USE_SIP" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-feature android:name="android.software.sip.voip" android:required="true" />
<uses-feature android:name="android.hardware.wifi" android:required="true" />
<uses-feature android:name="android.hardware.microphone" android:required="true" />
<application
android:name="io.flutter.app.FlutterApplication"
android:label="softphone"
android:icon="#mipmap/ic_launcher">
<receiver android:name=".IncomingCallReceiver" android:label="Call Receiver" />
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="#style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="#style/NormalTheme"
/>
<!-- Displays an Android View that continues showing the launch screen
Drawable until Flutter paints its first frame, then this splash
screen fades out. A splash screen is useful to avoid any visual
gap between the end of Android's launch screen and the painting of
Flutter's first frame. -->
<meta-data
android:name="io.flutter.embedding.android.SplashScreenDrawable"
android:resource="#drawable/launch_background"
/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
</application>
</manifest>
Thank you all in advance!

BroadcastReceiver Intent.ACTION_PACKAGE_ADDED/REMOVED Android Oreo

This is my broadcast receiver class and the implementation of it in main.
Problem is that onReceive method never gets called.
class MyBroadcastReceiver : BroadcastReceiver() {
override fun onReceive(p0: Context?, p1: Intent?) {
Toast.makeText(p0, "It works", Toast.LENGTH_LONG).show()
}
}
class MainActivity : AppCompatActivity() {
......
private var broadcastReceiver: MyBroadcastReceiver = MyBroadcastReceiver()
override fun onCreate(savedInstanceState: Bundle?) {
......
registerReceiver(broadcastReceiver, IntentFilter().apply {
addAction(Intent.ACTION_PACKAGE_ADDED)
addAction(Intent.ACTION_PACKAGE_REMOVED)
})
}
override fun onDestroy() {
super.onDestroy()
unregisterReceiver(broadcastReceiver)
}
}
Please help. Thanks in advance.

I could make it work with the following code
class KotlinBroadcastReceiver(action: (context: Context, intent: Intent) -> Unit) : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) = action(context, intent)
}
class MainActivity : AppCompatActivity() {
private val broadcastReceiver = KotlinBroadcastReceiver { context, _ ->
Toast.makeText(context, "It works", Toast.LENGTH_LONG).show()
}
override fun onCreate(savedInstanceState: Bundle?) {
registerReceiver(broadcastReceiver, IntentFilter().apply {
addAction(Intent.ACTION_PACKAGE_ADDED)
addAction(Intent.ACTION_PACKAGE_REMOVED)
addDataScheme("package") // I could not find a constant for that :(
})
}
override fun onDestroy() {
super.onDestroy()
unregisterReceiver(broadcastReceiver)
}
}

Usually the BroadcastReceiver needs a number of steps to be set up.
First of all did yout pass to the manifest the receiver?
<receiver android:name=".MyBroadcastReceiver" android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
<action android:name="android.intent.action.INPUT_METHOD_CHANGED" />
</intent-filter>
</receiver>
Edit: Please see this post, where is suggested ACTION_PACKAGE_FULLY_REMOVED or JobScheduler
try also to reinstall the app on the emulator

Keep calling service/broadcast from each other

I'm building a simple app, that keep monitoring the media level, and adjust it to be 20% of the maximum level all the time, if the user increased,it should back to 20%again.
Th concept I followed is doing the monitoring process via a service, once this service is destroyed it calls a broadcast receiver, which in its turn calls the receiver again, and so on, as endless cycle, but looks something wrong in the code below,soit is not working as desired, and service/broadcast not keep calling each others!
I started the mainActivity as:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val audio = this.getSystemService(Context.AUDIO_SERVICE) as AudioManager
val level = audio.getStreamVolume(AudioManager.STREAM_MUSIC)
val maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
val percent = 0.2f
val twintyVolume = (maxVolume * percent).toInt()
if ( level > twintyVolume) {
Toast.makeText(this,"audio level is $level", Toast.LENGTH_LONG).show()
audio.setStreamVolume(AudioManager.STREAM_MUSIC,twintyVolume,0)
}
this.startService(Intent(this, VolumeCheck::class.java))
}
}
The above make initial check and reduce the media volume to 20% of the max volume, then start the service, which is doing the same with the below code:
class VolumeCheck : Service() {
private lateinit var context: Context
override fun onCreate() {
super.onCreate()
context = this
Toast.makeText(this, "service created", Toast.LENGTH_SHORT).show();
}
override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
super.onStartCommand(intent, flags, startId)
Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();
val audio = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
val mediaPlayer = MediaPlayer()
// Thread().run {
val maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
val percent = 0.2f
val twintyVolume = (maxVolume * percent).toInt()
if (mediaPlayer.isPlaying) {
val level = audio.getStreamVolume(AudioManager.STREAM_MUSIC)
if ( level > twintyVolume) {
Toast.makeText(context,"audio level is $level", Toast.LENGTH_LONG).show()
audio.setStreamVolume(AudioManager.STREAM_MUSIC,twintyVolume,0)
}
}
// Thread.sleep(3000)
// }
stopSelf()
return Service.START_STICKY
}
override fun onBind(intent: Intent): IBinder? {
//TODO for communication return IBinder implementation
return null
}
override fun onDestroy() {
super.onDestroy()
Toast.makeText(this, "service done", Toast.LENGTH_SHORT).show()
val intent = Intent("com.kortex.mediafix.BootUpReceiver")
sendBroadcast(intent)
}
}
Once the service is destroyed, it calls the boot broadcast receiver, which in its turn call the service again:
class BootUpReceiver: BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
context.startService(Intent(context, VolumeCheck::class.java))
}
}
The Manifest is:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.kortex.mediafix">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".BootUpReceiver"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
<service android:name=".VolumeCheck" />
</application>
</manifest>

val intent = Intent("com.kortex.mediafix.BootUpReceiver")
This line does not call your broadcast receiver but rather makes an intent with intent action as "com.kortex.mediafix.BootUpReceiver"
Change your BootUpReceiver's entry in manifest to receive this action
<receiver android:name=".BootUpReceiver"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
<action android:name="com.kortex.mediafix.BootUpReceiver" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>

Another way to do it, without Service is to call ContentObserver from BroadcastReceiver
BroadcastReceiver:
class BootUpReceiver: BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
val myObserver = VolumeOnserver(context, Handler())
// Register the VolumeOnserver for setting changes
context.contentResolver.registerContentObserver(
android.provider.Settings.System.CONTENT_URI ,true,
myObserver)
}
}
ContentObserver:
class VolumeOnserver (context: Context, h: Handler?): ContentObserver(h) {
private val context = context
override fun onChange(selfChange: Boolean) {
onChange(selfChange, uri = null)
}
// Implement the onChange(boolean, Uri) method to take advantage of the new Uri argument.
override fun onChange(selfChange: Boolean, uri: Uri?) {
// Handle change.
val audio = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
val level = audio.getStreamVolume(AudioManager.STREAM_MUSIC)
val maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
val percent = 0.2f
val twintyVolume = (maxVolume * percent).toInt()
if ( level > twintyVolume) audio.setStreamVolume(AudioManager.STREAM_MUSIC,twintyVolume,0)
}
}
MainActivity:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val audio = this.getSystemService(Context.AUDIO_SERVICE) as AudioManager
val level = audio.getStreamVolume(AudioManager.STREAM_MUSIC)
val maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
val percent = 0.2f
val twintyVolume = (maxVolume * percent).toInt()
if ( level > twintyVolume) audio.setStreamVolume(AudioManager.STREAM_MUSIC,twintyVolume,0)
finish()
}
}

I solved it by using ContentObserver that is called from the service, so my code now is:
MainActivity to launch the app, and do first time adjustment, and to start the service:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val audio = this.getSystemService(Context.AUDIO_SERVICE) as AudioManager
val level = audio.getStreamVolume(AudioManager.STREAM_MUSIC)
val maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
val percent = 0.2f
val twintyVolume = (maxVolume * percent).toInt()
if ( level > twintyVolume) audio.setStreamVolume(AudioManager.STREAM_MUSIC,twintyVolume,0)
Toast.makeText(this,"Audio level adjusted to 20% instead of $level", Toast.LENGTH_LONG).show()
this.startService(Intent(this, VolumeCheck::class.java))
finish()
}
}
Broadcast to start the app and the service each time the device is rebooted:
class BootUpReceiver: BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
context.startService(Intent(context, VolumeCheck::class.java))
}
}
Service to register and call the observer:
class VolumeCheck : Service() {
private lateinit var context: Context
private lateinit var myObserver: VolumeOnserver
override fun onCreate() {
super.onCreate()
context = this
// Define the VolumeOnserver
myObserver = VolumeOnserver(context, Handler())
Toast.makeText(this, "service created", Toast.LENGTH_SHORT).show();
}
override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
super.onStartCommand(intent, flags, startId)
Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();
// Register the VolumeOnserver for setting changes
contentResolver.registerContentObserver(android.provider.Settings.System.CONTENT_URI ,true, myObserver);
return Service.START_STICKY
}
override fun onBind(intent: Intent): IBinder? {
return null
}
override fun onDestroy() {
super.onDestroy()
// Unregister the VolumeOnserver
contentResolver.unregisterContentObserver(myObserver);
}
}
Observer that observe any changes in the settings and check the media volume and adjust it if required:
class VolumeOnserver (context: Context, h: Handler?): ContentObserver(h) {
private val context = context
override fun onChange(selfChange: Boolean) {
onChange(selfChange, uri = null)
}
// Implement the onChange(boolean, Uri) method to take advantage of the new Uri argument.
override fun onChange(selfChange: Boolean, uri: Uri?) {
// Handle change.
val audio = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
val level = audio.getStreamVolume(AudioManager.STREAM_MUSIC)
val maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
val percent = 0.2f
val twintyVolume = (maxVolume * percent).toInt()
if ( level > twintyVolume) audio.setStreamVolume(AudioManager.STREAM_MUSIC,twintyVolume,0)
// Toast.makeText(context,"audio level is $level", Toast.LENGTH_LONG).show()
}
}
The Manifest file is:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.kortex.mediafix">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".BootUpReceiver"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
<action android:name="com.kortex.mediafix.BootUpReceiver" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
<service android:name=".VolumeCheck" />
</application>
</manifest>
And my running app is here.
But have an issue it is not stable, I the user insist to change the volume, after many trials the service and/or the observer is/are no more working till the app is restarted.