Migrate MainActivity to compose

app/src/main/kotlin/com/simplemobiletools/flashlight/activities/BrightDisplayActivity.kt

@@ -60,7 +60,7 @@ class BrightDisplayActivity : SimpleActivity() {
                     },
                     timerVisible = timerVisible,
                     timerText = timerText,
-                    onTimerCloseClick = {
+                    onTimerClosePress = {
                         stopSleepTimer()
                     }
                 )

app/src/main/kotlin/com/simplemobiletools/flashlight/activities/MainActivity.kt

@@ -2,16 +2,22 @@ package com.simplemobiletools.flashlight.activities
 
 import android.annotation.SuppressLint
 import android.app.AlarmManager
+import android.app.Application
 import android.content.Context
 import android.content.Intent
 import android.content.pm.ActivityInfo
 import android.content.pm.ShortcutInfo
-import android.graphics.drawable.ColorDrawable
 import android.graphics.drawable.Icon
 import android.graphics.drawable.LayerDrawable
 import android.os.Bundle
-import android.view.WindowManager
+import androidx.activity.compose.setContent
-import android.widget.ImageView
+import androidx.activity.viewModels
+import androidx.compose.runtime.getValue
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.google.android.material.math.MathUtils
+import com.simplemobiletools.commons.compose.extensions.onEventValue
+import com.simplemobiletools.commons.compose.theme.AppThemeSurface
 import com.simplemobiletools.commons.dialogs.PermissionRequiredDialog
 import com.simplemobiletools.commons.dialogs.RadioGroupDialog
 import com.simplemobiletools.commons.extensions.*
@@ -20,186 +26,142 @@ import com.simplemobiletools.commons.models.FAQItem
 import com.simplemobiletools.commons.models.RadioItem
 import com.simplemobiletools.flashlight.BuildConfig
 import com.simplemobiletools.flashlight.R
-import com.simplemobiletools.flashlight.databinding.ActivityMainBinding
 import com.simplemobiletools.flashlight.dialogs.SleepTimerCustomDialog
 import com.simplemobiletools.flashlight.extensions.config
 import com.simplemobiletools.flashlight.helpers.*
 import com.simplemobiletools.flashlight.models.Events
+import com.simplemobiletools.flashlight.screens.MainScreen
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.map
 import org.greenrobot.eventbus.EventBus
 import org.greenrobot.eventbus.Subscribe
 import org.greenrobot.eventbus.ThreadMode
 import java.util.*
+import kotlin.system.exitProcess
 
 class MainActivity : SimpleActivity() {
     companion object {
         private const val MAX_STROBO_DELAY = 2000L
         private const val MIN_STROBO_DELAY = 10L
-        private const val FLASHLIGHT_STATE = "flashlight_state"
-        private const val STROBOSCOPE_STATE = "stroboscope_state"
     }
 
-    private val binding by viewBinding(ActivityMainBinding::inflate)
+    private val viewModel by viewModels<MainViewModel>()
-
-    private var mBus: EventBus? = null
-    private var mCameraImpl: MyCameraImpl? = null
-    private var mIsFlashlightOn = false
-    private var reTurnFlashlightOn = true
 
     override fun onCreate(savedInstanceState: Bundle?) {
         isMaterialActivity = true
         super.onCreate(savedInstanceState)
-        setContentView(binding.root)
         appLaunched(BuildConfig.APPLICATION_ID)
-        setupOptionsMenu()
-        refreshMenuItems()
 
-        mBus = EventBus.getDefault()
+        setContent {
+            AppThemeSurface {
+                val showMoreApps = onEventValue { !resources.getBoolean(R.bool.hide_google_relations) }
+                val timerVisible by viewModel.timerVisible.collectAsStateWithLifecycle(false)
+                val timerText by viewModel.timerText.collectAsStateWithLifecycle()
+                val flashlightActive by viewModel.flashlightOn.collectAsStateWithLifecycle()
+                val showBrightDisplayButton by config.brightDisplayFlow.collectAsStateWithLifecycle(config.brightDisplay)
+                val showSosButton by config.sosFlow.collectAsStateWithLifecycle(config.sos)
+                val sosActive by viewModel.sosActive.collectAsStateWithLifecycle()
+                val showStroboscopeButton by config.stroboscopeFlow.collectAsStateWithLifecycle(config.stroboscope)
+                val stroboscopeActive by viewModel.stroboscopeActive.collectAsStateWithLifecycle()
+                val brightnessBarVisible by viewModel.brightnessBarVisible.collectAsStateWithLifecycle(false)
+                val brightnessBarValue by viewModel.brightnessBarValue.collectAsStateWithLifecycle()
+                val stroboscopeBarVisible by viewModel.stroboscopeBarVisible.collectAsStateWithLifecycle(false)
+                val stroboscopeBarValue by viewModel.stroboscopeBarValue.collectAsStateWithLifecycle()
 
-        binding.apply {
+                MainScreen(
-            updateMaterialActivityViews(mainCoordinator, mainHolder, useTransparentNavigation = true, useTopSearchMenu = false)
+                    timerText = timerText,
-            setupMaterialScrollListener(mainNestedScrollview, mainToolbar)
+                    timerVisible = timerVisible,
-
+                    onTimerClosePress = { stopSleepTimer() },
-            changeIconColor(getContrastColor(), stroboscopeBtn)
+                    onFlashlightPress = { viewModel.toggleFlashlight() },
-
+                    flashlightActive = flashlightActive,
-            brightDisplayBtn.setOnClickListener {
+                    showBrightDisplayButton = showBrightDisplayButton,
-                reTurnFlashlightOn = false
+                    onBrightDisplayPress = {
-                startActivity(Intent(applicationContext, BrightDisplayActivity::class.java))
+                        startActivity(Intent(applicationContext, BrightDisplayActivity::class.java))
+                    },
+                    showSosButton = showSosButton,
+                    sosActive = sosActive,
+                    onSosButtonPress = {
+                        toggleStroboscope(true)
+                    },
+                    showStroboscopeButton = showStroboscopeButton,
+                    stroboscopeActive = stroboscopeActive,
+                    onStroboscopeButtonPress = {
+                        toggleStroboscope(false)
+                    },
+                    showBrightnessBar = brightnessBarVisible,
+                    brightnessBarValue = brightnessBarValue,
+                    onBrightnessBarValueChange = {
+                        viewModel.updateBrightnessBarValue(it)
+                    },
+                    showStroboscopeBar = stroboscopeBarVisible,
+                    stroboscopeBarValue = stroboscopeBarValue,
+                    onStroboscopeBarValueChange = {
+                        viewModel.updateStroboscopeBarValue(it)
+                    },
+                    showMoreApps = showMoreApps,
+                    openSettings = ::launchSettings,
+                    openAbout = ::launchAbout,
+                    openSleepTimer = ::showSleepTimer,
+                    moreAppsFromUs = ::launchMoreAppsFromUsIntent
+                )
             }
-
-            flashlightBtn.setOnClickListener {
-                mCameraImpl!!.toggleFlashlight()
-            }
-
-            sosBtn.setOnClickListener {
-                toggleStroboscope(true)
-            }
-
-            stroboscopeBtn.setOnClickListener {
-                toggleStroboscope(false)
-            }
-
-            sleepTimerStop.setOnClickListener { stopSleepTimer() }
         }
 
-        setupStroboscope()
         checkAppOnSDCard()
     }
 
     override fun onResume() {
         super.onResume()
-        setupToolbar(binding.mainToolbar)
+        viewModel.onResume()
-        mCameraImpl!!.handleCameraSetup()
+//        val contrastColor = getContrastColor()
-        checkState(MyCameraImpl.isFlashlightOn)
 
-        val contrastColor = getContrastColor()
+//        binding.apply {
-
+//            changeIconColor(contrastColor, brightDisplayBtn)
-        binding.apply {
+//            brightDisplayBtn.beVisibleIf(config.brightDisplay)
-            changeIconColor(contrastColor, brightDisplayBtn)
+//            sosBtn.beVisibleIf(config.sos)
-            brightDisplayBtn.beVisibleIf(config.brightDisplay)
+//
-            sosBtn.beVisibleIf(config.sos)
+//            if (sosBtn.currentTextColor != getProperPrimaryColor()) {
-
+//                sosBtn.setTextColor(contrastColor)
-            if (sosBtn.currentTextColor != getProperPrimaryColor()) {
+//            }
-                sosBtn.setTextColor(contrastColor)
+//
-            }
+//            stroboscopeBtn.beVisibleIf(config.stroboscope)
-
+//
-            stroboscopeBtn.beVisibleIf(config.stroboscope)
+//            if (!config.stroboscope) {
-
+//                mCameraImpl!!.stopStroboscope()
-            if (!config.stroboscope) {
+//                stroboscopeBar.beInvisible()
-                mCameraImpl!!.stopStroboscope()
+//            }
-                stroboscopeBar.beInvisible()
+//
-            }
+//            updateTextColors(mainHolder)
-
+//            if (stroboscopeBar.isInvisible()) {
-            updateTextColors(mainHolder)
+//                changeIconColor(contrastColor, stroboscopeBtn)
-            if (stroboscopeBar.isInvisible()) {
+//            }
-                changeIconColor(contrastColor, stroboscopeBtn)
+//        }
-            }
+//
-        }
+//        binding.sleepTimerHolder.background = ColorDrawable(getProperBackgroundColor())
-
+//        binding.sleepTimerStop.applyColorFilter(getProperTextColor())
-        binding.sleepTimerHolder.background = ColorDrawable(getProperBackgroundColor())
-        binding.sleepTimerStop.applyColorFilter(getProperTextColor())
 
         requestedOrientation = if (config.forcePortraitMode) ActivityInfo.SCREEN_ORIENTATION_PORTRAIT else ActivityInfo.SCREEN_ORIENTATION_SENSOR
         invalidateOptionsMenu()
 
-        if (config.turnFlashlightOn && reTurnFlashlightOn) {
-            mCameraImpl!!.enableFlashlight()
-        }
-
-        reTurnFlashlightOn = true
-
         checkShortcuts()
     }
 
     override fun onStart() {
         super.onStart()
-        mBus!!.register(this)
 
         if (config.sleepInTS == 0L) {
-            binding.sleepTimerHolder.beGone()
+            viewModel.hideTimer()
             (getSystemService(Context.ALARM_SERVICE) as AlarmManager).cancel(getShutDownPendingIntent())
         }
-
-        if (mCameraImpl == null) {
-            setupCameraImpl()
-        }
-    }
-
-    override fun onStop() {
-        super.onStop()
-        mBus!!.unregister(this)
-    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        releaseCamera()
-    }
-
-    private fun setupOptionsMenu() {
-        binding.mainToolbar.setOnMenuItemClickListener { menuItem ->
-            when (menuItem.itemId) {
-                R.id.more_apps_from_us -> launchMoreAppsFromUsIntent()
-                R.id.settings -> launchSettings()
-                R.id.sleep_timer -> showSleepTimer()
-                R.id.about -> launchAbout()
-                else -> return@setOnMenuItemClickListener false
-            }
-            return@setOnMenuItemClickListener true
-        }
-    }
-
-    private fun refreshMenuItems() {
-        binding.mainToolbar.menu.apply {
-            findItem(R.id.more_apps_from_us).isVisible = !resources.getBoolean(R.bool.hide_google_relations)
-        }
-    }
-
-    override fun onSaveInstanceState(outState: Bundle) {
-        outState.putBoolean(FLASHLIGHT_STATE, mIsFlashlightOn)
-        outState.putBoolean(STROBOSCOPE_STATE, binding.stroboscopeBar.isVisible())
-        super.onSaveInstanceState(outState)
-    }
-
-    override fun onRestoreInstanceState(savedInstanceState: Bundle) {
-        super.onRestoreInstanceState(savedInstanceState)
-        val isFlashlightOn = savedInstanceState.getBoolean(FLASHLIGHT_STATE, false)
-        if (isFlashlightOn) {
-            mCameraImpl!!.toggleFlashlight()
-        }
-
-        val isStroboscopeOn = savedInstanceState.getBoolean(STROBOSCOPE_STATE, false)
-        if (isStroboscopeOn) {
-            toggleStroboscope(false)
-        }
     }
 
     private fun launchSettings() {
         hideKeyboard()
-        reTurnFlashlightOn = false
         startActivity(Intent(applicationContext, SettingsActivity::class.java))
     }
 
     private fun launchAbout() {
-        reTurnFlashlightOn = false
         val licenses = LICENSE_EVENT_BUS
 
         val faqItems = arrayListOf(
@@ -215,38 +177,6 @@ class MainActivity : SimpleActivity() {
         startAboutActivity(R.string.app_name, licenses, BuildConfig.VERSION_NAME, faqItems, true)
     }
 
-    private fun setupCameraImpl() {
-        mCameraImpl = MyCameraImpl.newInstance(this, object : CameraTorchListener {
-            override fun onTorchEnabled(isEnabled: Boolean) {
-                mCameraImpl!!.onTorchEnabled(isEnabled)
-                if (mCameraImpl!!.supportsBrightnessControl()) {
-                    binding.brightnessBar.beVisibleIf(isEnabled)
-                }
-            }
-
-            override fun onTorchUnavailable() {
-                mCameraImpl!!.onCameraNotAvailable()
-            }
-        })
-        if (config.turnFlashlightOn) {
-            mCameraImpl!!.enableFlashlight()
-        }
-        setupBrightness()
-    }
-
-    private fun setupStroboscope() {
-        binding.stroboscopeBar.apply {
-            max = (MAX_STROBO_DELAY - MIN_STROBO_DELAY).toInt()
-            progress = config.stroboscopeProgress
-            onSeekBarChangeListener { progress ->
-                val frequency = max - progress + MIN_STROBO_DELAY
-                mCameraImpl?.stroboFrequency = frequency
-                config.stroboscopeFrequency = frequency
-                config.stroboscopeProgress = progress
-            }
-        }
-    }
-
     private fun toggleStroboscope(isSOS: Boolean) {
         // use the old Camera API for stroboscope, the new Camera Manager is way too slow
         if (isNougatPlus()) {
@@ -262,37 +192,14 @@ class MainActivity : SimpleActivity() {
         }
     }
 
-    private fun setupBrightness() {
-        binding.brightnessBar.apply {
-            max = mCameraImpl?.getMaximumBrightnessLevel() ?: MIN_BRIGHTNESS_LEVEL
-            progress = mCameraImpl?.getCurrentBrightnessLevel() ?: MIN_BRIGHTNESS_LEVEL
-            onSeekBarChangeListener { level ->
-                val newLevel = level.coerceAtLeast(MIN_BRIGHTNESS_LEVEL)
-                mCameraImpl?.updateBrightnessLevel(newLevel)
-                config.brightnessLevel = newLevel
-            }
-        }
-    }
-
     private fun cameraPermissionGranted(isSOS: Boolean) {
         if (isSOS) {
-            val isSOSRunning = mCameraImpl!!.toggleSOS()
+            viewModel.enableSos()
-            binding.sosBtn.setTextColor(if (isSOSRunning) getProperPrimaryColor() else getContrastColor())
+        } else {
-        } else if (mCameraImpl!!.toggleStroboscope()) {
+            viewModel.enableStroboscope()
-            binding.apply {
-                stroboscopeBar.beInvisibleIf(stroboscopeBar.isVisible())
-                changeIconColor(if (stroboscopeBar.isVisible()) getProperPrimaryColor() else getContrastColor(), stroboscopeBtn)
-            }
         }
     }
 
-    private fun getContrastColor() = getProperBackgroundColor().getContrastColor()
-
-    private fun releaseCamera() {
-        mCameraImpl?.releaseCamera()
-        mCameraImpl = null
-    }
-
     private fun showSleepTimer(force: Boolean = false) {
         val alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
         if (isSPlus() && !alarmManager.canScheduleExactAlarms() && !force) {
@@ -353,72 +260,15 @@ class MainActivity : SimpleActivity() {
     }
 
     private fun startSleepTimer() {
-        binding.sleepTimerHolder.fadeIn()
+        viewModel.showTimer()
         startSleepTimerCountDown()
     }
 
     private fun stopSleepTimer() {
-        binding.sleepTimerHolder.fadeOut()
+        viewModel.hideTimer()
         stopSleepTimerCountDown()
     }
 
-    @Subscribe(threadMode = ThreadMode.MAIN)
-    fun sleepTimerChanged(event: Events.SleepTimerChanged) {
-        binding.sleepTimerValue.text = event.seconds.getFormattedDuration()
-        binding.sleepTimerHolder.beVisible()
-
-        if (event.seconds == 0) {
-            finish()
-        }
-    }
-
-    @Subscribe
-    fun stateChangedEvent(event: Events.StateChanged) {
-        checkState(event.isEnabled)
-    }
-
-    @Subscribe
-    fun stopStroboscope(event: Events.StopStroboscope) {
-        binding.stroboscopeBar.beInvisible()
-        changeIconColor(getContrastColor(), binding.stroboscopeBtn)
-    }
-
-    @Subscribe
-    fun stopSOS(event: Events.StopSOS) {
-        binding.sosBtn.setTextColor(getContrastColor())
-    }
-
-    private fun checkState(isEnabled: Boolean) {
-        if (isEnabled) {
-            enableFlashlight()
-        } else {
-            disableFlashlight()
-        }
-    }
-
-    private fun enableFlashlight() {
-        changeIconColor(getProperPrimaryColor(), binding.flashlightBtn)
-        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
-        mIsFlashlightOn = true
-
-        binding.apply {
-            sosBtn.setTextColor(getContrastColor())
-
-            changeIconColor(getContrastColor(), stroboscopeBtn)
-            stroboscopeBar.beInvisible()
-        }
-    }
-
-    private fun disableFlashlight() {
-        changeIconColor(getContrastColor(), binding.flashlightBtn)
-        window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
-        mIsFlashlightOn = false
-    }
-
-    private fun changeIconColor(color: Int, imageView: ImageView?) {
-        imageView!!.background.applyColorFilter(color)
-    }
-
     @SuppressLint("NewApi")
     private fun checkShortcuts() {
         val appIconColor = config.appIconColor
@@ -450,9 +300,166 @@ class MainActivity : SimpleActivity() {
             .build()
     }
 
-    @Subscribe
+    internal class MainViewModel(
-    fun cameraUnavailable(event: Events.CameraUnavailable) {
+        application: Application
-        toast(R.string.camera_error)
+    ) : AndroidViewModel(application) {
-        disableFlashlight()
+
+
+        private val _timerText: MutableStateFlow<String> = MutableStateFlow("00:00")
+        val timerText = _timerText.asStateFlow()
+
+        private val _timerVisible: MutableStateFlow<Boolean> = MutableStateFlow(false)
+        val timerVisible = _timerVisible.asStateFlow()
+
+        private val _flashlightOn: MutableStateFlow<Boolean> = MutableStateFlow(false)
+        val flashlightOn = _flashlightOn.asStateFlow()
+
+        val brightnessBarVisible = flashlightOn.map {
+            it && camera.supportsBrightnessControl()
+        }
+
+        private val _sosActive: MutableStateFlow<Boolean> = MutableStateFlow(false)
+        val sosActive = _sosActive.asStateFlow()
+
+        private val _brightnessBarValue: MutableStateFlow<Float> = MutableStateFlow(0f)
+        val brightnessBarValue = _brightnessBarValue.asStateFlow()
+
+        private val _stroboscopeActive: MutableStateFlow<Boolean> = MutableStateFlow(false)
+        val stroboscopeActive = _stroboscopeActive.asStateFlow()
+
+        val stroboscopeBarVisible = stroboscopeActive.map { it }
+
+        private val _stroboscopeBarValue: MutableStateFlow<Float> = MutableStateFlow(0f)
+        val stroboscopeBarValue = _stroboscopeBarValue.asStateFlow()
+
+        private lateinit var camera: MyCameraImpl
+
+        init {
+            EventBus.getDefault().register(this)
+
+            camera = MyCameraImpl.newInstance(application, object : CameraTorchListener {
+                override fun onTorchEnabled(isEnabled: Boolean) {
+                    camera.onTorchEnabled(isEnabled)
+                    if (isEnabled && camera.supportsBrightnessControl()) {
+                        _brightnessBarValue.value = camera.getCurrentBrightnessLevel().toFloat() / camera.getMaximumBrightnessLevel()
+                    }
+                }
+
+                override fun onTorchUnavailable() {
+                    camera.onCameraNotAvailable()
+                }
+            })
+            if (application.config.turnFlashlightOn) {
+                camera.enableFlashlight()
+            }
+
+            _stroboscopeBarValue.value = application.config.stroboscopeProgress.toFloat() / 100
+        }
+
+        @Subscribe(threadMode = ThreadMode.MAIN)
+        fun sleepTimerChanged(event: Events.SleepTimerChanged) {
+            _timerText.value = event.seconds.getFormattedDuration()
+            _timerVisible.value = true
+
+            if (event.seconds == 0) {
+                exitProcess(0)
+            }
+        }
+
+        fun hideTimer() {
+            _timerVisible.value = false
+        }
+
+        fun showTimer() {
+            _timerVisible.value = true
+        }
+
+        fun updateBrightnessBarValue(newValue: Float) {
+            _brightnessBarValue.value = newValue
+            val max = camera.getMaximumBrightnessLevel()
+            val min = MIN_BRIGHTNESS_LEVEL
+            val newLevel = MathUtils.lerp(min.toFloat(), max.toFloat(), newValue)
+            camera.updateBrightnessLevel(newLevel.toInt())
+            getApplication<Application>().config.brightnessLevel = newLevel.toInt()
+        }
+
+        fun updateStroboscopeBarValue(newValue: Float) {
+            _stroboscopeBarValue.value = newValue
+            val max = MAX_STROBO_DELAY
+            val min = MIN_STROBO_DELAY
+            val newLevel = MathUtils.lerp(min.toFloat(), max.toFloat(), 1 - newValue)
+            camera.stroboFrequency = newLevel.toLong()
+            getApplication<Application>().config.stroboscopeFrequency = newLevel.toLong()
+            getApplication<Application>().config.stroboscopeProgress = ((1 - newLevel) * 100).toInt()
+        }
+
+        fun onResume() {
+            checkState(MyCameraImpl.isFlashlightOn)
+            camera.handleCameraSetup()
+
+            if (getApplication<Application>().config.turnFlashlightOn) {
+                camera.enableFlashlight()
+            }
+        }
+
+        private fun checkState(isEnabled: Boolean) {
+            if (isEnabled) {
+                enableFlashlight()
+            } else {
+                disableFlashlight()
+            }
+        }
+
+
+        fun enableFlashlight() {
+            _flashlightOn.value = true
+        }
+
+        private fun disableFlashlight() {
+            _flashlightOn.value = false
+        }
+
+        @Subscribe
+        fun stateChangedEvent(event: Events.StateChanged) {
+            checkState(event.isEnabled)
+        }
+
+        @Subscribe
+        fun stopStroboscope(event: Events.StopStroboscope) {
+            _stroboscopeActive.value = false
+        }
+
+        @Subscribe
+        fun stopSOS(event: Events.StopSOS) {
+            _sosActive.value = false
+        }
+
+        @Subscribe
+        fun cameraUnavailable(event: Events.CameraUnavailable) {
+            getApplication<Application>().toast(R.string.camera_error)
+            disableFlashlight()
+        }
+
+        override fun onCleared() {
+            super.onCleared()
+            EventBus.getDefault().unregister(this)
+            releaseCamera()
+        }
+
+        fun toggleFlashlight() {
+            camera.toggleFlashlight()
+        }
+
+        private fun releaseCamera() {
+            camera.releaseCamera()
+        }
+
+        fun enableSos() {
+            _sosActive.value = camera.toggleSOS()
+        }
+
+        fun enableStroboscope() {
+            _stroboscopeActive.value = camera.toggleStroboscope()
+        }
     }
 }

app/src/main/kotlin/com/simplemobiletools/flashlight/screens/BrightDisplayScreen.kt

@@ -1,9 +1,14 @@
 package com.simplemobiletools.flashlight.screens
 
-import androidx.compose.animation.*
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
-import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.navigationBarsPadding
+import androidx.compose.foundation.layout.wrapContentSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
@@ -26,7 +31,7 @@ internal fun BrightDisplayScreen(
     timerText: String?,
     timerVisible: Boolean,
     onChangeColorPress: () -> Unit,
-    onTimerCloseClick: () -> Unit
+    onTimerClosePress: () -> Unit
 ) {
     Box(
         modifier = Modifier
@@ -51,7 +56,8 @@ internal fun BrightDisplayScreen(
         }
 
         AnimatedVisibility(
-            modifier = Modifier.align(Alignment.BottomEnd)
+            modifier = Modifier
+                .align(Alignment.BottomEnd)
                 .navigationBarsPadding(),
             visible = timerVisible,
             enter = fadeIn(),
@@ -59,7 +65,7 @@ internal fun BrightDisplayScreen(
         ) {
             SleepTimer(
                 timerText = timerText ?: "",
-                onCloseClick = onTimerCloseClick
+                onCloseClick = onTimerClosePress
             )
         }
     }
@@ -74,7 +80,7 @@ private fun BrightDisplayScreenPreview() {
             timerText = "00:00",
             timerVisible = true,
             onChangeColorPress = {},
-            onTimerCloseClick = {}
+            onTimerClosePress = {}
         )
     }
 }

app/src/main/kotlin/com/simplemobiletools/flashlight/screens/MainScreen.kt

@@ -0,0 +1,220 @@
+package com.simplemobiletools.flashlight.screens
+
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Settings
+import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.dimensionResource
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.TextUnit
+import androidx.compose.ui.unit.TextUnitType
+import com.simplemobiletools.commons.compose.extensions.AdjustNavigationBarColors
+import com.simplemobiletools.commons.compose.extensions.MyDevices
+import com.simplemobiletools.commons.compose.menus.ActionItem
+import com.simplemobiletools.commons.compose.menus.ActionMenu
+import com.simplemobiletools.commons.compose.menus.OverflowMode
+import com.simplemobiletools.commons.compose.settings.scaffold.SettingsLazyScaffold
+import com.simplemobiletools.commons.compose.settings.scaffold.topAppBarColors
+import com.simplemobiletools.commons.compose.settings.scaffold.topAppBarInsets
+import com.simplemobiletools.commons.compose.settings.scaffold.topAppBarPaddings
+import com.simplemobiletools.commons.compose.theme.AppThemeSurface
+import com.simplemobiletools.flashlight.R
+import com.simplemobiletools.flashlight.views.SleepTimer
+import kotlinx.collections.immutable.toImmutableList
+
+@Composable
+internal fun MainScreen(
+    timerText: String?,
+    timerVisible: Boolean,
+    onTimerClosePress: () -> Unit,
+    flashlightActive: Boolean,
+    onFlashlightPress: () -> Unit,
+    showBrightDisplayButton: Boolean,
+    onBrightDisplayPress: () -> Unit,
+    showSosButton: Boolean,
+    sosActive: Boolean,
+    onSosButtonPress: () -> Unit,
+    showStroboscopeButton: Boolean,
+    stroboscopeActive: Boolean,
+    onStroboscopeButtonPress: () -> Unit,
+    showBrightnessBar: Boolean,
+    brightnessBarValue: Float,
+    onBrightnessBarValueChange: (Float) -> Unit,
+    showStroboscopeBar: Boolean,
+    stroboscopeBarValue: Float,
+    onStroboscopeBarValueChange: (Float) -> Unit,
+    showMoreApps: Boolean,
+    openSettings: () -> Unit,
+    openAbout: () -> Unit,
+    openSleepTimer: () -> Unit,
+    moreAppsFromUs: () -> Unit,
+) {
+    AdjustNavigationBarColors()
+    SettingsLazyScaffold(
+        customTopBar = { scrolledColor: Color, _: MutableInteractionSource, scrollBehavior: TopAppBarScrollBehavior, statusBarColor: Int, colorTransitionFraction: Float, contrastColor: Color ->
+            TopAppBar(
+                title = {},
+                actions = {
+                    val actionMenus = remember {
+                        val settings =
+                            ActionItem(R.string.settings, icon = Icons.Filled.Settings, doAction = openSettings, overflowMode = OverflowMode.NEVER_OVERFLOW)
+                        val about = ActionItem(R.string.about, icon = Icons.Outlined.Info, doAction = openAbout, overflowMode = OverflowMode.NEVER_OVERFLOW)
+                        val sleepTimer = ActionItem(R.string.sleep_timer, doAction = openSleepTimer, overflowMode = OverflowMode.ALWAYS_OVERFLOW)
+                        val list = mutableListOf(settings, about, sleepTimer)
+                        if (showMoreApps) {
+                            list += ActionItem(R.string.more_apps_from_us, doAction = moreAppsFromUs, overflowMode = OverflowMode.ALWAYS_OVERFLOW)
+                        }
+                        list.toImmutableList()
+                    }
+                    var isMenuVisible by remember { mutableStateOf(false) }
+                    ActionMenu(
+                        items = actionMenus,
+                        numIcons = 2,
+                        isMenuVisible = isMenuVisible,
+                        onMenuToggle = { isMenuVisible = it },
+                        iconsColor = scrolledColor
+                    )
+                },
+                scrollBehavior = scrollBehavior,
+                colors = topAppBarColors(statusBarColor, colorTransitionFraction, contrastColor),
+                modifier = Modifier.topAppBarPaddings(),
+                windowInsets = topAppBarInsets()
+            )
+        }) {
+        Column(
+            modifier = Modifier.fillMaxSize(),
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.SpaceEvenly
+        ) {
+            Icon(
+                modifier = Modifier
+                    .size(dimensionResource(id = R.dimen.main_button_size))
+                    .padding(vertical = dimensionResource(id = R.dimen.normal_margin))
+                    .clickable(onClick = onFlashlightPress),
+                painter = painterResource(id = R.drawable.ic_flashlight_vector),
+                contentDescription = stringResource(id = R.string.flashlight_short),
+                tint = if (flashlightActive) MaterialTheme.colorScheme.primary else Color.Unspecified
+            )
+
+            if (showBrightDisplayButton) {
+                Icon(
+                    modifier = Modifier
+                        .size(dimensionResource(id = R.dimen.smaller_button_size))
+                        .padding(vertical = dimensionResource(id = R.dimen.normal_margin))
+                        .clickable(onClick = onBrightDisplayPress),
+                    painter = painterResource(id = R.drawable.ic_bright_display_vector),
+                    contentDescription = stringResource(id = R.string.bright_display)
+                )
+            }
+
+            if (showSosButton) {
+                Text(
+                    modifier = Modifier
+                        .padding(vertical = dimensionResource(id = R.dimen.normal_margin))
+                        .clickable(onClick = onSosButtonPress),
+                    text = "SOS",
+                    fontSize = TextUnit(dimensionResource(id = R.dimen.sos_text_size).value, TextUnitType.Sp),
+                    fontWeight = FontWeight.Bold,
+                    color = if (sosActive) MaterialTheme.colorScheme.primary else Color.Unspecified
+                )
+            }
+
+            if (showStroboscopeButton) {
+                Icon(
+                    modifier = Modifier
+                        .size(dimensionResource(id = R.dimen.smaller_button_size))
+                        .padding(vertical = dimensionResource(id = R.dimen.normal_margin))
+                        .clickable(onClick = onStroboscopeButtonPress),
+                    painter = painterResource(id = R.drawable.ic_stroboscope_vector),
+                    contentDescription = "",
+                    tint = if (stroboscopeActive) MaterialTheme.colorScheme.primary else Color.Unspecified
+                )
+            }
+
+            val sliderModifier = Modifier
+                .padding(dimensionResource(id = R.dimen.activity_margin))
+                .padding(vertical = dimensionResource(R.dimen.medium_margin))
+                .padding(bottom = dimensionResource(id = R.dimen.activity_margin))
+                .size(width = dimensionResource(id = R.dimen.seekbar_width), height = dimensionResource(id = R.dimen.seekbar_height))
+
+            if (showBrightnessBar) {
+                Slider(
+                    modifier = sliderModifier,
+                    value = brightnessBarValue,
+                    onValueChange = onBrightnessBarValueChange
+                )
+            }
+
+            if (showStroboscopeBar) {
+                Slider(
+                    modifier = sliderModifier,
+                    value = stroboscopeBarValue,
+                    onValueChange = onStroboscopeBarValueChange
+                )
+            }
+
+            if (!showBrightnessBar && !showStroboscopeBar) {
+                Spacer(
+                    modifier = sliderModifier,
+                )
+            }
+        }
+
+        AnimatedVisibility(
+            modifier = Modifier.align(Alignment.BottomEnd),
+            visible = timerVisible,
+            enter = fadeIn(),
+            exit = fadeOut(),
+        ) {
+            SleepTimer(
+                timerText = timerText ?: "",
+                onCloseClick = onTimerClosePress
+            )
+        }
+    }
+}
+
+@Composable
+@MyDevices
+internal fun MainScreenPreview() {
+    AppThemeSurface {
+        MainScreen(
+            timerText = "00:00",
+            timerVisible = true,
+            onTimerClosePress = {},
+            onFlashlightPress = {},
+            flashlightActive = true,
+            showBrightDisplayButton = true,
+            onBrightDisplayPress = {},
+            showSosButton = true,
+            sosActive = false,
+            onSosButtonPress = {},
+            showStroboscopeButton = true,
+            stroboscopeActive = false,
+            onStroboscopeButtonPress = {},
+            showBrightnessBar = false,
+            brightnessBarValue = 0f,
+            onBrightnessBarValueChange = {},
+            showStroboscopeBar = false,
+            stroboscopeBarValue = 0f,
+            onStroboscopeBarValueChange = {},
+            showMoreApps = true,
+            openSettings = {},
+            openAbout = {},
+            moreAppsFromUs = {},
+            openSleepTimer = {}
+        )
+    }
+}

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

@@ -1,5 +1,6 @@
 <resources>
     <dimen name="seekbar_width">250dp</dimen>
+    <dimen name="seekbar_height">20dp</dimen>
     <dimen name="main_button_size">180dp</dimen>
     <dimen name="smaller_button_size">60dp</dimen>
     <dimen name="shortcut_padding">60dp</dimen>