Fix answering calls with app not in foreground

Author: TheLastProject

app/build.gradle

@@ -10,8 +10,8 @@ android {
         applicationId "me.hackerchick.raisetoanswer"
         minSdkVersion 26
         targetSdkVersion 29
-        versionCode 2
-        versionName "1.1"
+        versionCode 3
+        versionName "1.1.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
 
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <uses-permission android:name="android.permission.ANSWER_PHONE_CALLS" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <application
         android:allowBackup="true"
@@ -24,6 +25,8 @@
                 <action android:name="android.intent.action.PHONE_STATE" />
             </intent-filter>
         </receiver>
+
+        <service android:enabled="true" android:name=".RaiseToAnswerSensorEventListener" />
     </application>
 
 </manifest>

app/src/main/java/me/hackerchick/raisetoanswer/MainActivity.kt

@@ -2,46 +2,48 @@ package me.hackerchick.raisetoanswer
 
 import android.Manifest
 import android.content.Context
+import android.content.Intent
 import android.content.pm.PackageManager
 import android.hardware.Sensor
 import android.hardware.SensorManager
 import android.os.Bundle
 import android.widget.Button
-import android.widget.CompoundButton
 import android.widget.Switch
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
+import java.util.*
+import java.util.concurrent.ScheduledThreadPoolExecutor
+import java.util.concurrent.TimeUnit
 
 
 class MainActivity : AppCompatActivity() {
     private var PERMISSION_REQUEST_READ_PHONE_STATE = 1
 
-    private var mSensorEventListener: RaiseToAnswerSensorEventListener? = null
+    private val setListenerState: Stack<Boolean> = Stack()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
+        val intent = Intent(this, RaiseToAnswerSensorEventListener::class.java)
+        this.startService(intent)
+
         ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_PHONE_STATE, Manifest.permission.ANSWER_PHONE_CALLS), PERMISSION_REQUEST_READ_PHONE_STATE)
 
         var sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager
         var proximitySensor = sensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY)
         var accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
 
-        mSensorEventListener = RaiseToAnswerSensorEventListener(sensorManager, proximitySensor, accelerometer)
-
         val testButton: Button = findViewById(R.id.test_button)
         testButton.setOnClickListener {
             Toast.makeText(applicationContext, getString(R.string.hold_to_ear_test), Toast.LENGTH_SHORT).show()
-            mSensorEventListener!!.waitUntilEarPickup {}
+            RaiseToAnswerSensorEventListener.instance!!.waitUntilEarPickup { }
         }
 
         val activeSwitch: Switch = findViewById(R.id.raise_to_answer_switch)
         val appEnabled = getSharedPreferences(getString(R.string.app_enabled_key), Context.MODE_PRIVATE)
 
-        activeSwitch.isChecked = appEnabled.getInt(getString(R.string.app_enabled_key), 1) == 1
-
         activeSwitch.setOnCheckedChangeListener { _, isChecked ->
             if (isChecked) {
                 with (appEnabled.edit()) {
@@ -54,7 +56,32 @@ class MainActivity : AppCompatActivity() {
                     commit()
                 }
             }
+            setListenerState.push(isChecked)
         }
+
+        activeSwitch.isChecked = appEnabled.getInt(getString(R.string.app_enabled_key), 1) == 1
+
+        val executor = ScheduledThreadPoolExecutor(1)
+        executor.scheduleWithFixedDelay({
+            var listener: RaiseToAnswerSensorEventListener? = RaiseToAnswerSensorEventListener.instance
+
+            if (listener == null)
+                return@scheduleWithFixedDelay
+
+            while (!setListenerState.empty()) {
+                var value = setListenerState.pop()
+                if (value) {
+                    listener.bind(
+                        this,
+                        sensorManager,
+                        proximitySensor,
+                        accelerometer
+                    )
+                } else {
+                    listener.disable()
+                }
+            }
+        }, 0L, 1000, TimeUnit.MILLISECONDS)
     }
 
     override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {

app/src/main/java/me/hackerchick/raisetoanswer/RaiseToAnswerCallReceiver.kt

@@ -12,21 +12,13 @@ class RaiseToAnswerCallReceiver : BroadcastReceiver() {
     private var mTelephony: TelephonyManager? = null
     private var mPhoneListener: RaiseToAnswerPhoneStateListener? = null
 
-    private var mSensorManager: SensorManager? = null
-    private var mProximitySensor: Sensor? = null
-    private var mAccelerometer: Sensor? = null
-
     override fun onReceive(context: Context, intent: Intent?) {
         if (context.getSharedPreferences(context.getString(R.string.app_enabled_key), Context.MODE_PRIVATE).getInt(context.getString(R.string.app_enabled_key), 1) != 1) {
             // Don't do anything if app is set to "disabled"
             return
         }
 
-        mSensorManager = context.getSystemService(Context.SENSOR_SERVICE) as SensorManager
-        mProximitySensor = mSensorManager!!.getDefaultSensor(Sensor.TYPE_PROXIMITY)
-        mAccelerometer = mSensorManager!!.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
-
-        mPhoneListener = RaiseToAnswerPhoneStateListener(context, mSensorManager!!, mProximitySensor!!, mAccelerometer!!)
+        mPhoneListener = RaiseToAnswerPhoneStateListener(context)
 
         mTelephony = context
             .getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager

app/src/main/java/me/hackerchick/raisetoanswer/RaiseToAnswerPhoneStateListener.kt

@@ -1,45 +1,39 @@
 package me.hackerchick.raisetoanswer
 
 import android.annotation.SuppressLint
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.PendingIntent
 import android.content.Context
+import android.content.Intent
 import android.hardware.Sensor
 import android.hardware.SensorManager
 import android.telecom.TelecomManager
 import android.telephony.PhoneStateListener
 import android.telephony.TelephonyManager
 import android.widget.Toast
 
-class RaiseToAnswerPhoneStateListener(context: Context, sensorManager: SensorManager, proximitySensor: Sensor, accelerometer: Sensor) : PhoneStateListener() {
-    private var mContext: Context? = null
-
-    private var mSensorEventListener: RaiseToAnswerSensorEventListener? = null
 
-    private var mSensorManager: SensorManager? = null
-    private var mProximitySensor: Sensor? = null
-    private var mAccelerometer: Sensor? = null
+class RaiseToAnswerPhoneStateListener(context: Context) : PhoneStateListener() {
+    private var mContext: Context? = null
 
     init {
         mContext = context
-        mSensorManager = sensorManager
-        mProximitySensor = proximitySensor
-        mAccelerometer = accelerometer
     }
 
     @SuppressLint("MissingPermission")
     override fun onCallStateChanged(state: Int, incomingNumber: String) {
         when (state) {
             TelephonyManager.CALL_STATE_IDLE -> {
-                mSensorEventListener?.stop()
-                mSensorEventListener = null
+                RaiseToAnswerSensorEventListener.instance!!.stop()
             }
             TelephonyManager.CALL_STATE_RINGING -> {
-                Toast.makeText(mContext, mContext!!.getString(R.string.hold_to_ear_to_answer), Toast.LENGTH_LONG).show()
-                mSensorEventListener = RaiseToAnswerSensorEventListener(mSensorManager!!, mProximitySensor!!, mAccelerometer!!)
-                mSensorEventListener!!.waitUntilEarPickup{ ->
+                RaiseToAnswerSensorEventListener.instance!!.waitUntilEarPickup{ ->
                     // Pickup triggered
                     val tm = mContext!!.getSystemService(Context.TELECOM_SERVICE) as TelecomManager
                     tm.acceptRingingCall()
                 }
+                Toast.makeText(mContext, mContext!!.getString(R.string.hold_to_ear_to_answer), Toast.LENGTH_LONG).show()
             }
         }
     }

app/src/main/java/me/hackerchick/raisetoanswer/RaiseToAnswerSensorEventListener.kt

@@ -1,19 +1,30 @@
 package me.hackerchick.raisetoanswer
 
+import android.app.*
+import android.content.Context
+import android.content.Intent
 import android.hardware.Sensor
 import android.hardware.SensorEvent
 import android.hardware.SensorEventListener
 import android.hardware.SensorManager
 import android.media.AudioManager
 import android.media.ToneGenerator
+import android.os.IBinder
 import android.util.Log
 import java.util.*
 import kotlin.math.atan2
 import kotlin.math.roundToInt
 import kotlin.math.sqrt
 
-class RaiseToAnswerSensorEventListener(sensorManager: SensorManager, proximitySensor: Sensor, accelerometer: Sensor) : SensorEventListener {
+
+class RaiseToAnswerSensorEventListener : Service(), SensorEventListener {
+    companion object {
+        var instance: RaiseToAnswerSensorEventListener? = null
+    }
+
+    private val ONGOING_NOTIFICATION_ID = 1
     private val SENSOR_SENSITIVITY = 4
+
     private var mProximityValue: Float? = null
     private var mInclinationValue: Int? = null
 
@@ -25,14 +36,45 @@ class RaiseToAnswerSensorEventListener(sensorManager: SensorManager, proximitySe
     private var pickupBeepsDone = 0
     private var mTimer: Timer? = null
 
+    private var mContext: Context? = null
     private var mSensorManager: SensorManager? = null
     private var mProximitySensor: Sensor? = null
     private var mAccelerometer: Sensor? = null
 
-    init {
+    override fun onCreate() {
+        Log.d("TEST", "Creating")
+        instance = this
+        Log.d("TEST", "Created")
+    }
+
+    override fun onBind(p0: Intent?): IBinder? { return null }
+
+    fun bind(context: Context, sensorManager: SensorManager, proximitySensor: Sensor, accelerometer: Sensor) {
+        mContext = context
         mSensorManager = sensorManager
         mProximitySensor = proximitySensor
         mAccelerometer = accelerometer
+
+        val pendingIntent: PendingIntent =
+            Intent(this, RaiseToAnswerSensorEventListener::class.java).let { notificationIntent ->
+                PendingIntent.getActivity(mContext, 0, notificationIntent, 0)
+            }
+
+        val channel = NotificationChannel("incoming_call", getString(R.string.incoming_call_service), NotificationManager.IMPORTANCE_LOW)
+        val service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        service.createNotificationChannel(channel)
+
+        val notification: Notification = Notification.Builder(mContext, "incoming_call")
+            .setSmallIcon(R.mipmap.ic_launcher)
+            .setContentText(getText(R.string.raise_to_answer_is_enabled))
+            .setContentIntent(pendingIntent)
+            .build()
+
+        startForeground(ONGOING_NOTIFICATION_ID, notification)
+    }
+
+    fun disable() {
+        stopForeground(true)
     }
 
     fun waitUntilEarPickup(callback: () -> Unit) {
@@ -45,6 +87,8 @@ class RaiseToAnswerSensorEventListener(sensorManager: SensorManager, proximitySe
                     var proximityValue = mProximityValue
                     var inclinationValue = mInclinationValue
 
+                    Log.d("TESTTEST", inclinationValue.toString())
+
                     if (resetBeepsDone < 2) {
                         if (proximityValue == null || (proximityValue >= SENSOR_SENSITIVITY || proximityValue <= -SENSOR_SENSITIVITY)) {
                             mToneGenerator.startTone(ToneGenerator.TONE_CDMA_PIP, 100)

app/src/main/res/values-nl/strings.xml

@@ -7,4 +7,6 @@
     <string name="hold_to_ear_to_answer">Hou de telefoon tegen je oor om op te nemen</string>
     <string name="raise_to_answer_header">Neem op met je oor</string>
     <string name="raise_to_answer_explanation">Je zal 2 piepjes horen wanneer de app klaar is om een gesprek op te nemen. Hou dan de telefoon dan rechtop en tegen je oor aan om op te nemen. De app zal nog 3 maal piepen om de detectie te bevestigen.</string>
+    <string name="incoming_call_service">Dienst voor inkomende gesprekken</string>
+    <string name="raise_to_answer_is_enabled">Raise To Answer is ingeschakeld</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -7,4 +7,6 @@
     <string name="hold_to_ear_to_answer">Hold your phone to your ear to answer</string>
     <string name="raise_to_answer_header">Raise to Answer</string>
     <string name="raise_to_answer_explanation">You will hear 2 beeps when the app is ready to take the call. Then, simply hold the phone to your ear in an upright position to answer the call. The app will beep 3 more times to signify it detecting proximity to your ear.</string>
+    <string name="incoming_call_service">Incoming call service</string>
+    <string name="raise_to_answer_is_enabled">Raise To Answer is enabled</string>
 </resources>

fastlane/metadata/android/en-US/changelogs/1.1.1.txt

@@ -0,0 +1 @@
+Fix answering not working if app is not in foreground

fastlane/metadata/android/nl-NL/changelogs/1.1.1.txt

@@ -0,0 +1 @@
+Het beantwoorden van gesprekken terwijl de app niet in de voorgrond staat werkt nu