Change scanner to CompanionDeviceManager

lib_scanner/src/main/AndroidManifest.xml

@@ -1,15 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
     package="no.nordicsemi.android.scanner">
 
+    <uses-feature android:name="android.software.companion_device_setup"/>
+
     <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
 
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
     <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
-    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"
-        tools:ignore="CoarseFineLocation" />
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
 
 </manifest>

lib_scanner/src/main/java/no/nordicsemi/android/scanner/ListOfDevicesScreen.kt

@@ -1,71 +0,0 @@
-package no.nordicsemi.android.scanner
-
-import android.annotation.SuppressLint
-import android.bluetooth.BluetoothDevice
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.itemsIndexed
-import androidx.compose.material.Button
-import androidx.compose.material.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.collectAsState
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.dp
-import androidx.hilt.navigation.compose.hiltViewModel
-import no.nordicsemi.android.events.exhaustive
-
-@Composable
-internal fun ListOfDevicesScreen(onDeviceSelected: (BluetoothDevice) -> Unit) {
-
-    val viewModel = hiltViewModel<NordicBleScannerViewModel>()
-
-    val result = viewModel.scannerResult.collectAsState().value
-
-    when (result) {
-        is DeviceListResult -> DeviceListView(result.devices, onDeviceSelected)
-        is ScanningErrorResult -> ScanningErrorView()
-    }.exhaustive
-}
-
-@SuppressLint("MissingPermission")
-@Composable
-private fun DeviceListView(
-    devices: List<BluetoothDevice>,
-    onDeviceSelected: (BluetoothDevice) -> Unit
-) {
-    Column(horizontalAlignment = Alignment.CenterHorizontally) {
-        Spacer(modifier = Modifier.height(16.dp))
-        Text(stringResource(id = R.string.scanner__list_of_devices))
-        Spacer(modifier = Modifier.height(16.dp))
-        LazyColumn(
-            modifier = Modifier.padding(horizontal = 16.dp),
-            verticalArrangement = Arrangement.spacedBy(12.dp)
-        ) {
-
-            itemsIndexed(devices) { _, device ->
-                Button(
-                    modifier = Modifier.fillMaxWidth(),
-                    onClick = { onDeviceSelected(device) }
-                ) {
-                    Column {
-                        Text(device.name ?: stringResource(id = R.string.scanner__no_name))
-                        Spacer(modifier = Modifier.height(8.dp))
-                        Text(text = device.address)
-                    }
-                }
-            }
-        }
-    }
-}
-
-@Composable
-private fun ScanningErrorView() {
-    Text(text = stringResource(id = R.string.scanner__error))
-}

lib_scanner/src/main/java/no/nordicsemi/android/scanner/ScannerNavigation.kt

@@ -9,9 +9,13 @@ import androidx.compose.ui.res.stringResource
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavController
 import no.nordicsemi.android.events.exhaustive
-import no.nordicsemi.android.scanner.bluetooth.BluetoothNotAvailableScreen
+import no.nordicsemi.android.scanner.tools.ScannerStatus
-import no.nordicsemi.android.scanner.bluetooth.BluetoothNotEnabledScreen
+import no.nordicsemi.android.scanner.ui.BluetoothNotAvailableScreen
-import no.nordicsemi.android.scanner.permissions.RequestPermissionScreen
+import no.nordicsemi.android.scanner.ui.BluetoothNotEnabledScreen
+import no.nordicsemi.android.scanner.ui.NordicBleScannerViewModel
+import no.nordicsemi.android.scanner.ui.RequestPermissionScreen
+import no.nordicsemi.android.scanner.ui.ScanDeviceScreen
+import no.nordicsemi.android.scanner.ui.ScannerViewEvent
 
 @Composable
 fun ScannerRoute(navController: NavController) {
@@ -35,15 +39,6 @@ private fun ScannerScreen(
         ScannerStatus.PERMISSION_REQUIRED -> RequestPermissionScreen { onEvent(ScannerViewEvent.PERMISSION_CHECKED) }
         ScannerStatus.NOT_AVAILABLE -> BluetoothNotAvailableScreen()
         ScannerStatus.DISABLED -> BluetoothNotEnabledScreen { onEvent(ScannerViewEvent.BLUETOOTH_ENABLED) }
-        ScannerStatus.ENABLED -> {
+        ScannerStatus.ENABLED -> ScanDeviceScreen(navController)
-            onEvent(ScannerViewEvent.ENABLE_SCANNING)
-            ListOfDevicesScreen {
-                navController.previousBackStackEntry
-                    ?.savedStateHandle
-                    ?.set("result", it)
-                navController.popBackStack()
-                onEvent(ScannerViewEvent.DISABLE_SCANNING)
-            }
-        }
     }.exhaustive
 }

lib_scanner/src/main/java/no/nordicsemi/android/scanner/tools/NordicBleScanner.kt

@@ -1,4 +1,4 @@
-package no.nordicsemi.android.scanner
+package no.nordicsemi.android.scanner.tools
 
 import android.annotation.SuppressLint
 import android.bluetooth.BluetoothAdapter

lib_scanner/src/main/java/no/nordicsemi/android/scanner/tools/ScannerStatus.kt

@@ -1,4 +1,4 @@
-package no.nordicsemi.android.scanner
+package no.nordicsemi.android.scanner.tools
 
 enum class ScannerStatus {
     PERMISSION_REQUIRED, ENABLED, DISABLED, NOT_AVAILABLE

lib_scanner/src/main/java/no/nordicsemi/android/scanner/ui/BluetoothNotAvailableScreen.kt

@@ -1,4 +1,4 @@
-package no.nordicsemi.android.scanner.bluetooth
+package no.nordicsemi.android.scanner.ui
 
 import android.app.Activity
 import android.bluetooth.BluetoothAdapter

lib_scanner/src/main/java/no/nordicsemi/android/scanner/ui/NordicBleScannerViewModel.kt

@@ -1,9 +1,11 @@
-package no.nordicsemi.android.scanner
+package no.nordicsemi.android.scanner.ui
 
 import androidx.lifecycle.ViewModel
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
 import no.nordicsemi.android.events.exhaustive
+import no.nordicsemi.android.scanner.tools.NordicBleScanner
+import no.nordicsemi.android.scanner.tools.ScannerStatus
 import javax.inject.Inject
 
 @HiltViewModel
@@ -20,8 +22,6 @@ internal class NordicBleScannerViewModel @Inject constructor(
         when (event) {
             ScannerViewEvent.PERMISSION_CHECKED -> onPermissionChecked()
             ScannerViewEvent.BLUETOOTH_ENABLED -> onBluetoothEnabled()
-            ScannerViewEvent.ENABLE_SCANNING -> bleScanner.startScanning()
-            ScannerViewEvent.DISABLE_SCANNING -> bleScanner.stopScanning()
         }.exhaustive
     }
 
@@ -36,7 +36,7 @@ internal class NordicBleScannerViewModel @Inject constructor(
 }
 
 enum class ScannerViewEvent {
-    PERMISSION_CHECKED, BLUETOOTH_ENABLED, ENABLE_SCANNING, DISABLE_SCANNING
+    PERMISSION_CHECKED, BLUETOOTH_ENABLED
 }
 
 internal data class NordicBleScannerState(

lib_scanner/src/main/java/no/nordicsemi/android/scanner/ui/RequestPermissionScreen.kt

@@ -1,4 +1,4 @@
-package no.nordicsemi.android.scanner.permissions
+package no.nordicsemi.android.scanner.ui
 
 import android.content.Context
 import android.content.Intent

lib_scanner/src/main/java/no/nordicsemi/android/scanner/ui/ScanDeviceScreen.kt

@@ -0,0 +1,62 @@
+package no.nordicsemi.android.scanner.ui
+
+import android.app.Activity
+import android.bluetooth.BluetoothDevice
+import android.companion.AssociationRequest
+import android.companion.BluetoothDeviceFilter
+import android.companion.CompanionDeviceManager
+import android.content.Context
+import android.content.IntentSender
+import android.os.Build
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.IntentSenderRequest
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.platform.LocalContext
+import androidx.navigation.NavController
+
+@Composable
+fun ScanDeviceScreen(navController: NavController,) {
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+        val deviceFilter: BluetoothDeviceFilter = BluetoothDeviceFilter.Builder()
+            .build()
+
+        val pairingRequest: AssociationRequest = AssociationRequest.Builder()
+            .build()
+
+        val deviceManager =
+            LocalContext.current.getSystemService(Context.COMPANION_DEVICE_SERVICE) as CompanionDeviceManager
+
+        val contract = ActivityResultContracts.StartIntentSenderForResult()
+        val launcher = rememberLauncherForActivityResult(contract = contract, onResult = {
+            if (it.resultCode == Activity.RESULT_OK) {
+                val deviceToPair: BluetoothDevice? = it.data?.getParcelableExtra(
+                    CompanionDeviceManager.EXTRA_DEVICE)
+                navController.previousBackStackEntry
+                    ?.savedStateHandle
+                    ?.set("result", deviceToPair)
+                navController.popBackStack()
+            }
+        })
+
+        val hasBeenInvoked = remember { mutableStateOf(false) }
+        if (hasBeenInvoked.value) {
+            return
+        }
+        hasBeenInvoked.value = true
+        deviceManager.associate(pairingRequest,
+            object : CompanionDeviceManager.Callback() {
+                override fun onDeviceFound(chooserLauncher: IntentSender) {
+                    val request = IntentSenderRequest.Builder(chooserLauncher).build()
+                    launcher.launch(request)
+                }
+
+                override fun onFailure(error: CharSequence?) {
+                }
+            }, null)
+    } else {
+        TODO("VERSION.SDK_INT < O")
+    }
+}