Jetpack Compose OverlayService. You have to have all the correct permissions granted and in your manifest, but if you do, this this will show a green box with "Hello" in it!

MyLifecycleOwner.kt

import android.os.Bundle
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.LifecycleRegistry
import androidx.savedstate.SavedStateRegistry
import androidx.savedstate.SavedStateRegistryController
import androidx.savedstate.SavedStateRegistryOwner

internal class MyLifecycleOwner : SavedStateRegistryOwner {
    private var mLifecycleRegistry: LifecycleRegistry = LifecycleRegistry(this)
    private var mSavedStateRegistryController: SavedStateRegistryController = SavedStateRegistryController.create(this)

    /**
     * @return True if the Lifecycle has been initialized.
     */
    val isInitialized: Boolean
        get() = true

    override fun getLifecycle(): Lifecycle {
        return mLifecycleRegistry
    }

    fun setCurrentState(state: Lifecycle.State) {
        mLifecycleRegistry.currentState = state
    }

    fun handleLifecycleEvent(event: Lifecycle.Event) {
        mLifecycleRegistry.handleLifecycleEvent(event)
    }

    override fun getSavedStateRegistry(): SavedStateRegistry {
        return mSavedStateRegistryController.savedStateRegistry
    }

    fun performRestore(savedState: Bundle?) {
        mSavedStateRegistryController.performRestore(savedState)
    }

    fun performSave(outBundle: Bundle) {
        mSavedStateRegistryController.performSave(outBundle)
    }
}

OverlayService.kt

import android.app.AlertDialog
import android.app.Service
import android.content.Intent
import android.graphics.PixelFormat
import android.os.Build
import android.os.IBinder
import android.util.TypedValue
import android.view.Window
import android.view.WindowManager
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.Text
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.ComposeView
import androidx.compose.ui.unit.sp
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.ViewModelStore
import androidx.lifecycle.ViewTreeLifecycleOwner
import androidx.lifecycle.ViewTreeViewModelStoreOwner
import androidx.savedstate.ViewTreeSavedStateRegistryOwner
import com.viatek.fitnation.echelon_android.R


class OverlayService : Service() {

    val windowManager get() = getSystemService(WINDOW_SERVICE) as WindowManager

    override fun onCreate() {
        super.onCreate()
        setTheme(R.style.ThemeOverlay_AppCompat_Light)
        showOverlay()
    }

    private fun showOverlay() {
        val layoutFlag: Int = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY
        } else {
            WindowManager.LayoutParams.TYPE_PHONE
        }

        val params = WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            layoutFlag,
            WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE or WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN or WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT
        )

        val composeView = ComposeView(this)
        composeView.setContent {
            Text(
                text = "Hello",
                color = Color.Black,
                fontSize = 50.sp,
                modifier = Modifier
                    .wrapContentSize()
                    .background(Color.Green)
            )
        }

        // Trick The ComposeView into thinking we are tracking lifecycle
        val viewModelStore = ViewModelStore()
        val lifecycleOwner = MyLifecycleOwner()
        lifecycleOwner.performRestore(null)
        lifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_CREATE)
        ViewTreeLifecycleOwner.set(composeView, lifecycleOwner)
        ViewTreeViewModelStoreOwner.set(composeView) { viewModelStore }
        ViewTreeSavedStateRegistryOwner.set(composeView, lifecycleOwner)

        windowManager.addView(composeView, params)
    }

    override fun onBind(intent: Intent): IBinder? {
        return null
    }
}

There is an open source library to create overlay view with jetpackcompose
https://github.com/KuhakuPixel/UberAlles/

(DISCLAIMER: I am the author and still in early stage of development, would appreciate your feedback and fix :D )

@wilinz @FreePhoenix888 I fixed the ComposeView not recomposing by, in addition to lifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_CREATE), adding

lifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_START)
lifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_RESUME)

Reached the same conclusions on some of the comments, specially the updated APIs and the requirement to trigger the START and RESUME lifecycle events so recomposition worked. I found the snippet here, that's why I was unable to find the updates suggested by commenters: https://www.jetpackcompose.app/snippets/OverlayService See my code here: https://github.com/xrubioj/JetpackComposeOverlayTest

Does anyone know how to handle on back button pressed in this service to close the service/remove the overlay when the back button is pressed?

@handstandsam

give permission in manifest file::

permission android:name="android.permission.SYSTEM_ALERT_WINDOW"

in MainActivity code is ::

class MainActivity : ComponentActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    if (!Settings.canDrawOverlays(this)) {
        val intent = Intent(
            Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
            Uri.parse("package:$packageName")
        )
        startActivityForResult(intent, 101)
    }
    setContent {

        TikDownloaderTheme {
            // A surface container using the 'background' color from the theme
            Surface(
                modifier = Modifier.fillMaxSize(),
                color = MaterialTheme.colorScheme.background
            ) {
                val context = LocalContext.current
                val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
                AddFloatingButtonOverlay(windowManager)

            }
        }
    }
}

}

@composable
fun AddFloatingButtonOverlay(windowManager: WindowManager) {
val context = LocalContext.current
val composeView = remember {
ComposeView(context).apply {
setContent {
Box {
FloatingButton(onClick = { })
}
}
}
}

// Set layout parameters for the floating button
val params = WindowManager.LayoutParams(
    WindowManager.LayoutParams.WRAP_CONTENT,
    WindowManager.LayoutParams.WRAP_CONTENT,
    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
    android.graphics.PixelFormat.TRANSLUCENT
)

// Set the position of the floating button on the screen
params.x = 100 // Set the X position
params.y = 100 // Set the Y position
composeView.setViewTreeLifecycleOwner(LocalLifecycleOwner.current)
composeView.setViewTreeSavedStateRegistryOwner(LocalSavedStateRegistryOwner.current)

windowManager.addView(composeView, params)

}

@composable
fun FloatingButton(onClick: () -> Unit) {
FloatingActionButton(
onClick = onClick,
modifier = androidx.compose.ui.Modifier.padding(16.dp)
) {
Text(text = "Floating Overlay")
}
}

@tberghuis

Thanks for this, I used this code to create a floating timer https://github.com/tberghuis/FloatingCountdownTimer

HI ! thanks a lot for your beautiful project that helped me to understand some things. the readme and the documentation are quite short. So as the project has a lot of dependency injections it took me a while to understand the overlay mechanism. Do you have a site or a place you posted a kind of step by step documentation build or something else ?

@GC-public-projects there is no documentation as my implementation is hacked together using this gist and some stackoverflow answers.

I think Google should provide an official sample implementation now that XML views are no longer encouraged.

This is not my project

…

On Sat, 13 Jul 2024, 2:57 am Tom Berghuis, ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ @GC-public-projects <https://github.com/GC-public-projects> there is no documentation as my implementation is hacked together using this gist and some stackoverflow answers. I think Google should provide an official sample implementation now that XML views are no longer encouraged. — Reply to this email directly, view it on GitHub <https://gist.github.com/handstandsam/6ecff2f39da72c0b38c07aa80bbb5a2f#gistcomment-5119746> or unsubscribe <https://github.com/notifications/unsubscribe-auth/A7DDFDWS7F7YMSTSOWDNVI3ZMBGMBBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTANZUG4YTCMBSU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you commented on the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .