improve location permission check

app/src/main/java/com/geeksville/mesh/MainActivity.kt

@@ -189,7 +189,7 @@ class MainActivity : BaseActivity(), Logging,
 
     /** Get the minimum permissions our app needs to run correctly
      */
-    private fun getMinimumPermissions(): List<String> {
+    private fun getMinimumPermissions(): Array<String> {
         val perms = mutableListOf(
             Manifest.permission.WAKE_LOCK
 
@@ -218,18 +218,12 @@ class MainActivity : BaseActivity(), Logging,
     /** Ask the user to grant Bluetooth scan/discovery permission */
     fun requestScanPermission() = requestPermission(getScanPermissions(), true)
 
-    /** Ask the user to grant foreground location permission */
-    fun requestLocationPermission() = requestPermission(getLocationPermissions())
-
-    /** Ask the user to grant background location permission */
-    fun requestBackgroundPermission() = requestPermission(getBackgroundPermissions())
-
     /**
      * @return a localized string warning user about missing permissions.  Or null if everything is find
      */
     @SuppressLint("InlinedApi")
     fun getMissingMessage(
-        missingPerms: List<String> = getMinimumPermissions()
+        missingPerms: Array<String> = getMinimumPermissions()
     ): String? {
         val renamedPermissions = mapOf(
             // Older versions of android don't know about these permissions - ignore failure to grant
@@ -262,7 +256,7 @@ class MainActivity : BaseActivity(), Logging,
      * @return true if we already have the needed permissions
      */
     private fun requestPermission(
-        missingPerms: List<String> = getMinimumPermissions(),
+        missingPerms: Array<String> = getMinimumPermissions(),
         shouldShowDialog: Boolean = false
     ): Boolean =
         if (missingPerms.isNotEmpty()) {
@@ -275,7 +269,7 @@ class MainActivity : BaseActivity(), Logging,
                 // Ask for all the missing perms
                 ActivityCompat.requestPermissions(
                     this,
-                    missingPerms.toTypedArray(),
+                    missingPerms,
                     DID_REQUEST_PERM
                 )
             }

app/src/main/java/com/geeksville/mesh/android/ContextServices.kt

@@ -47,17 +47,17 @@ fun Context.hasGps(): Boolean =
 /**
  * return a list of the permissions we don't have
  */
-fun Context.getMissingPermissions(perms: List<String>) = perms.filter {
+fun Context.getMissingPermissions(perms: List<String>): Array<String> = perms.filter {
     ContextCompat.checkSelfPermission(
         this,
         it
     ) != PackageManager.PERMISSION_GRANTED
-}
+}.toTypedArray()
 
 /**
  * Bluetooth connect permissions (or empty if we already have what we need)
  */
-fun Context.getConnectPermissions(): List<String> {
+fun Context.getConnectPermissions(): Array<String> {
     val perms = mutableListOf<String>()
 
 /*  TODO - wait for targetSdkVersion 31
@@ -76,7 +76,7 @@ fun Context.hasConnectPermission() = getConnectPermissions().isEmpty()
 /**
  * Bluetooth scan/discovery permissions (or empty if we already have what we need)
  */
-fun Context.getScanPermissions(): List<String> {
+fun Context.getScanPermissions(): Array<String> {
     val perms = mutableListOf<String>()
 
 /*  TODO - wait for targetSdkVersion 31
@@ -101,7 +101,7 @@ fun Context.hasScanPermission() = getScanPermissions().isEmpty()
 /**
  * Camera permission (or empty if we already have what we need)
  */
-fun Context.getCameraPermissions(): List<String> {
+fun Context.getCameraPermissions(): Array<String> {
     val perms = mutableListOf(Manifest.permission.CAMERA)
 
     return getMissingPermissions(perms)
@@ -113,7 +113,7 @@ fun Context.hasCameraPermission() = getCameraPermissions().isEmpty()
 /**
  * Location permission (or empty if we already have what we need)
  */
-fun Context.getLocationPermissions(): List<String> {
+fun Context.getLocationPermissions(): Array<String> {
     val perms = mutableListOf(Manifest.permission.ACCESS_FINE_LOCATION)
 
     return getMissingPermissions(perms)
@@ -125,8 +125,8 @@ fun Context.hasLocationPermission() = getLocationPermissions().isEmpty()
 /**
  * A list of missing background location permissions (or empty if we already have what we need)
  */
-fun Context.getBackgroundPermissions(): List<String> {
-    val perms = mutableListOf<String>()
+fun Context.getBackgroundPermissions(): Array<String> {
+    val perms = mutableListOf(Manifest.permission.ACCESS_FINE_LOCATION)
 
     if (Build.VERSION.SDK_INT >= 29) // only added later
         perms.add(Manifest.permission.ACCESS_BACKGROUND_LOCATION)

app/src/main/java/com/geeksville/mesh/ui/ChannelFragment.kt

@@ -1,6 +1,5 @@
 package com.geeksville.mesh.ui
 
-import android.Manifest
 import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.graphics.ColorMatrix
@@ -25,6 +24,7 @@ import com.geeksville.mesh.AppOnlyProtos
 import com.geeksville.mesh.ChannelProtos
 import com.geeksville.mesh.ConfigProtos
 import com.geeksville.mesh.R
+import com.geeksville.mesh.android.getCameraPermissions
 import com.geeksville.mesh.android.hasCameraPermission
 import com.geeksville.mesh.databinding.ChannelFragmentBinding
 import com.geeksville.mesh.model.Channel
@@ -219,12 +219,11 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
                 debug("Camera permission denied")
             }
             .setPositiveButton(getString(R.string.accept)) { _, _ ->
-                requestPermissionAndScanLauncher.launch(Manifest.permission.CAMERA)
+                requestPermissionAndScanLauncher.launch(requireContext().getCameraPermissions())
             }
             .show()
     }
 
-
     private fun mlkitScan() {
         debug("Starting ML Kit QR code scanner")
         val options = GmsBarcodeScannerOptions.Builder()
@@ -368,8 +367,8 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
     }
 
     private val requestPermissionAndScanLauncher =
-        registerForActivityResult(ActivityResultContracts.RequestPermission()) { allowed ->
-            if (allowed) zxingScan()
+        registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
+            if (permissions.entries.all { it.value == true }) zxingScan()
         }
 
     // Register zxing launcher and result handler

app/src/main/java/com/geeksville/mesh/ui/SettingsFragment.kt

@@ -793,11 +793,9 @@ class SettingsFragment : ScreenFragment("Settings"), Logging {
         binding.provideLocationCheckbox.setOnCheckedChangeListener { view, isChecked ->
             if (view.isPressed && isChecked) { // We want to ignore changes caused by code (as opposed to the user)
                 // Don't check the box until the system setting changes
-                view.isChecked = myActivity.hasLocationPermission() && myActivity.hasBackgroundPermission()
+                view.isChecked = myActivity.hasBackgroundPermission()
 
-                if (!myActivity.hasLocationPermission()) // Make sure we have location permission (prerequisite)
-                    myActivity.requestLocationPermission()
-                else if (!myActivity.hasBackgroundPermission())
+                if (!myActivity.hasBackgroundPermission())
                     MaterialAlertDialogBuilder(requireContext())
                         .setTitle(R.string.background_required)
                         .setMessage(R.string.why_background_required)
@@ -805,7 +803,12 @@ class SettingsFragment : ScreenFragment("Settings"), Logging {
                             debug("User denied background permission")
                         }
                         .setPositiveButton(getString(R.string.accept)) { _, _ ->
-                            myActivity.requestBackgroundPermission()
+                            // Make sure we have location permission (prerequisite)
+                            if (!myActivity.hasLocationPermission()) {
+                                requestLocationAndBackgroundLauncher.launch(myActivity.getLocationPermissions())
+                            } else {
+                                requestBackgroundAndCheckLauncher.launch(myActivity.getBackgroundPermissions())
+                            }
                         }
                         .show()
                 if (view.isChecked) {
@@ -940,6 +943,23 @@ class SettingsFragment : ScreenFragment("Settings"), Logging {
             }
     }
 
+    private val requestLocationAndBackgroundLauncher =
+        registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
+            if (permissions.entries.all { it.value == true }) {
+                // Older versions of android only need Location permission
+                if (myActivity.hasBackgroundPermission()) {
+                    binding.provideLocationCheckbox.isChecked = true
+                } else requestBackgroundAndCheckLauncher.launch(myActivity.getBackgroundPermissions())
+            }
+        }
+
+    private val requestBackgroundAndCheckLauncher =
+        registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
+            if (permissions.entries.all { it.value == true }) {
+                binding.provideLocationCheckbox.isChecked = true
+            }
+        }
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)