Play sounds on each timer phase

app/src/main/java/com/wbrawner/trainterval/activetimer/ActiveTimerFragment.kt

@@ -1,26 +1,29 @@
 package com.wbrawner.trainterval.activetimer
 
+import android.media.AudioManager
+import android.media.SoundPool
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat.getSystemService
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Observer
+import androidx.lifecycle.viewModelScope
 import androidx.navigation.fragment.findNavController
 import com.wbrawner.trainterval.Logger
 import com.wbrawner.trainterval.R
 import com.wbrawner.trainterval.model.IntervalTimerDao
+import com.wbrawner.trainterval.model.Phase
 import kotlinx.android.synthetic.main.fragment_active_timer.*
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.cancel
-import kotlinx.coroutines.launch
+import kotlinx.coroutines.*
 import org.koin.android.ext.android.inject
 import org.koin.core.parameter.parametersOf
 
+
 class ActiveTimerFragment : Fragment() {
 
     private var coroutineScope: CoroutineScope? = null
@@ -28,11 +31,29 @@ class ActiveTimerFragment : Fragment() {
     private val logger: Logger by inject(parameters = { parametersOf("ActiveTimerStore") })
     private val timerDao: IntervalTimerDao by inject()
     private var timerId: Long = 0
+    private lateinit var soundPool: SoundPool
+    private val soundIds = mutableListOf<Int>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         timerId = requireArguments().getLong(EXTRA_TIMER_ID)
         setHasOptionsMenu(true)
+        soundPool = SoundPool.Builder()
+            .setMaxStreams(Phase.values().size)
+            .build()
+        activeTimerViewModel.viewModelScope.launch {
+            if (soundIds.isEmpty()) {
+                val assetManager = context?.assets ?: return@launch
+                withContext(Dispatchers.IO) {
+                    Phase.values().forEachIndexed { index, phase ->
+                        soundIds.add(
+                            index,
+                            soundPool.load(assetManager.openFd("audio/${phase.soundFile}"), 1)
+                        )
+                    }
+                }
+            }
+        }
     }
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean =
@@ -94,6 +115,17 @@ class ActiveTimerFragment : Fragment() {
         timeRemaining.text = state.timeRemaining
         timerSets.text = state.currentSet.toString()
         timerRounds.text = state.currentRound.toString()
+        state.soundId?.let {
+            playSound(soundIds[it])
+        }
+    }
+
+    private fun playSound(soundId: Int) {
+        val context = context ?: return
+        val audioManager = getSystemService(context, AudioManager::class.java) ?: return
+        val maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC).toFloat()
+        val volume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC).toFloat() / maxVolume
+        soundPool.play(soundId, volume, volume, 1, 0, 1f)
     }
 
     override fun onDestroyView() {

app/src/main/java/com/wbrawner/trainterval/activetimer/ActiveTimerViewModel.kt

@@ -42,16 +42,7 @@ class ActiveTimerViewModel : ViewModel() {
             currentRound = timer.cycles
             timeRemaining = timer.warmUpDuration
             currentPhase = Phase.WARM_UP
-            timerState.postValue(
-                TimerRunningState(
-                    timer,
-                    timeRemaining,
-                    currentSet,
-                    currentRound,
-                    currentPhase,
-                    timerJob != null
-                )
-            )
+            updateTimer()
         }
     }
 
@@ -220,6 +211,7 @@ sealed class IntervalTimerActiveState {
         val timeRemaining: String,
         val currentSet: Int,
         val currentRound: Int,
+        val soundId: Int?,
         @ColorRes val timerBackground: Int,
         @DrawableRes val playPauseIcon: Int
     ) : IntervalTimerActiveState() {
@@ -236,6 +228,9 @@ sealed class IntervalTimerActiveState {
             currentSet = currentSet,
             currentRound = currentRound,
             timerBackground = phase.colorRes,
+            soundId = if (timerRunning && timeRemaining == timer.durationForPhase(phase))
+                phase.ordinal
+            else null,
             playPauseIcon = if (timerRunning) R.drawable.ic_pause else R.drawable.ic_play_arrow
         )
     }

app/src/main/java/com/wbrawner/trainterval/model/IntervalTimer.kt

@@ -18,14 +18,25 @@ data class IntervalTimer(
     val coolDownDuration: Long = TimeUnit.MINUTES.toMillis(5),
     val sets: Int = 4,
     val cycles: Int = 1
-)
+) {
+    fun durationForPhase(phase: Phase) = when (phase) {
+        Phase.WARM_UP -> warmUpDuration
+        Phase.LOW_INTENSITY -> lowIntensityDuration
+        Phase.HIGH_INTENSITY -> highIntensityDuration
+        Phase.REST -> restDuration
+        Phase.COOL_DOWN -> coolDownDuration
+    }
+}
 
-enum class Phase(@ColorRes val colorRes: Int) {
-    WARM_UP(R.color.colorSurface),
-    LOW_INTENSITY(R.color.colorSurfaceLowIntensity),
-    HIGH_INTENSITY(R.color.colorSurfaceHighIntensity),
-    REST(R.color.colorSurfaceRest),
-    COOL_DOWN(R.color.colorSurfaceCoolDown),
+enum class Phase(
+    @ColorRes val colorRes: Int,
+    val soundFile: String
+) {
+    WARM_UP(R.color.colorSurface, "warm.mp3"),
+    LOW_INTENSITY(R.color.colorSurfaceLowIntensity, "low.mp3"),
+    HIGH_INTENSITY(R.color.colorSurfaceHighIntensity, "high.mp3"),
+    REST(R.color.colorSurfaceRest, "rest.mp3"),
+    COOL_DOWN(R.color.colorSurfaceCoolDown, "cool.mp3"),
 }
 
 @Dao

app/src/main/res/layout/fragment_active_timer.xml

@@ -52,13 +52,15 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="@string/label_set"
-            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline6" />
+            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline6"
+            android:textColor="@color/colorOnSurface" />
 
         <TextView
             android:id="@+id/timerSets"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline5"
+            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline3"
+            android:textColor="@color/colorOnSurface"
             tools:text="5" />
     </LinearLayout>
 
@@ -77,13 +79,15 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="@string/label_round"
-            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline6" />
+            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline6"
+            android:textColor="@color/colorOnSurface" />
 
         <TextView
             android:id="@+id/timerRounds"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline5"
+            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline3"
+            android:textColor="@color/colorOnSurface"
             tools:text="4" />
     </LinearLayout>