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SpeakerApp.kt
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SpeakerApp.kt
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/*
* Copyright 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.wearable.speaker
import android.Manifest
import android.app.Activity
import android.content.Context
import android.content.ContextWrapper
import androidx.activity.compose.ManagedActivityResultLauncher
import androidx.activity.compose.rememberLauncherForActivityResult
import androidx.activity.result.contract.ActivityResultContracts.RequestPermission
import androidx.compose.runtime.Composable
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.platform.LocalLifecycleOwner
import androidx.compose.ui.res.stringResource
import androidx.lifecycle.DefaultLifecycleObserver
import androidx.lifecycle.LifecycleOwner
import androidx.lifecycle.viewmodel.compose.viewModel
import androidx.wear.compose.material.MaterialTheme
import androidx.wear.compose.material.Text
import androidx.wear.compose.material.dialog.Confirmation
import androidx.wear.compose.navigation.SwipeDismissableNavHost
import androidx.wear.compose.navigation.composable
import androidx.wear.compose.navigation.rememberSwipeDismissableNavController
import com.google.android.horologist.annotations.ExperimentalHorologistApi
import com.google.android.horologist.audio.ui.VolumeScreen
import com.google.android.horologist.audio.ui.VolumeViewModel
import com.google.android.horologist.compose.layout.AppScaffold
import com.google.android.horologist.compose.layout.ScreenScaffold
import com.google.android.horologist.compose.material.AlertContent
import kotlinx.coroutines.launch
/**
* The logic for the speaker sample.
*
* The stateful logic is kept by a [MainState].
*/
@OptIn(ExperimentalHorologistApi::class)
@Composable
fun SpeakerApp() {
MaterialTheme {
lateinit var requestPermissionLauncher: ManagedActivityResultLauncher<String, Boolean>
val context = LocalContext.current
val activity = context.findActivity()
val scope = rememberCoroutineScope()
val volumeViewModel: VolumeViewModel = viewModel(factory = VolumeViewModel.Factory)
val navController = rememberSwipeDismissableNavController()
val mainState = remember(activity) {
MainState(
activity = activity,
requestPermission = {
requestPermissionLauncher.launch(Manifest.permission.RECORD_AUDIO)
}
)
}
requestPermissionLauncher = rememberLauncherForActivityResult(RequestPermission()) {
// We ignore the direct result here, since we're going to check anyway.
scope.launch {
mainState.permissionResultReturned()
}
}
val lifecycleOwner = LocalLifecycleOwner.current
AppScaffold {
// Notify the state holder whenever we become stopped to reset the state
DisposableEffect(mainState, scope, lifecycleOwner) {
val lifecycleObserver = object : DefaultLifecycleObserver {
override fun onStop(owner: LifecycleOwner) {
super.onStop(owner)
scope.launch { mainState.onStopped() }
}
}
lifecycleOwner.lifecycle.addObserver(lifecycleObserver)
onDispose {
lifecycleOwner.lifecycle.removeObserver(lifecycleObserver)
}
}
SwipeDismissableNavHost(navController = navController, startDestination = "speaker") {
composable("speaker") {
SpeakerRecordingScreen(
playbackState = mainState.playbackState,
isPermissionDenied = mainState.isPermissionDenied,
recordingProgress = mainState.recordingProgress,
onMicClicked = {
scope.launch {
mainState.onMicClicked()
}
},
onPlayClicked = {
navController.navigate("player")
}
)
if (mainState.showPermissionRationale) {
AlertContent(
onOk = {
requestPermissionLauncher.launch(Manifest.permission.RECORD_AUDIO)
mainState.showPermissionRationale = false
},
onCancel = {
mainState.showPermissionRationale = false
},
title = stringResource(
id = R.string.rationale_for_microphone_permission
)
)
}
if (mainState.showSpeakerNotSupported) {
Confirmation(
onTimeout = { mainState.showSpeakerNotSupported = false }
) {
Text(text = stringResource(id = R.string.no_speaker_supported))
}
}
}
composable("player") {
SpeakerPlayerScreen(
volumeViewModel = volumeViewModel,
onVolumeClick = { navController.navigate("volume") }
)
}
composable("volume") {
ScreenScaffold(timeText = {}) {
VolumeScreen(volumeViewModel = volumeViewModel)
}
}
}
}
}
}
/**
* Find the closest Activity in a given Context.
*/
tailrec fun Context.findActivity(): Activity =
when (this) {
is Activity -> this
is ContextWrapper -> baseContext.findActivity()
else -> throw IllegalStateException(
"findActivity should be called in the context of an Activity"
)
}