Switch to getSystemService's extension method everywhere

Null-safe and avoids type-casting

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/com/aurora/extensions/Context.kt

@@ -38,6 +38,7 @@ import android.view.LayoutInflater
 import androidx.browser.customtabs.CustomTabsIntent
 import androidx.core.app.ActivityCompat
 import androidx.core.app.ActivityOptionsCompat
+import androidx.core.content.getSystemService
 import com.aurora.Constants
 import com.aurora.gplayapi.data.models.App
 import com.aurora.store.R
@@ -101,9 +102,9 @@ fun Context.getEmptyActivityBundle(): Bundle? {
 }
 
 fun Context.copyToClipBoard(data: String?) {
-    val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+    val clipboard = getSystemService<ClipboardManager>()
     val clip = ClipData.newPlainText("Download Url", data)
-    clipboard.setPrimaryClip(clip)
+    clipboard?.setPrimaryClip(clip)
 }
 
 fun Context.getStyledAttributeColor(id: Int): Int {
@@ -115,9 +116,7 @@ fun Context.getStyledAttributeColor(id: Int): Int {
 
 fun Context.isIgnoringBatteryOptimizations(): Boolean {
     return if (isMAndAbove()) {
-        (getSystemService(Context.POWER_SERVICE) as PowerManager).isIgnoringBatteryOptimizations(
-            packageName
-        )
+        (getSystemService<PowerManager>())?.isIgnoringBatteryOptimizations(packageName) ?: true
     } else {
         true
     }
@@ -137,8 +136,8 @@ fun Context.isExternalStorageAccessible(): Boolean {
 
 fun Context.isDomainVerified(domain: String): Boolean {
     return if (isSAndAbove()) {
-        val domainVerificationManager = getSystemService(DomainVerificationManager::class.java)
-        val userState = domainVerificationManager.getDomainVerificationUserState(packageName)
+        val domainVerificationManager = getSystemService<DomainVerificationManager>()
+        val userState = domainVerificationManager!!.getDomainVerificationUserState(packageName)
         val domainMap = userState?.hostToStateMap?.filterKeys { it == domain }
         domainMap?.values?.first() == DomainVerificationUserState.DOMAIN_STATE_SELECTED
     } else {

app/src/main/java/com/aurora/extensions/View.kt

@@ -19,9 +19,9 @@
 
 package com.aurora.extensions
 
-import android.content.Context
 import android.view.View
 import android.view.inputmethod.InputMethodManager
+import androidx.core.content.getSystemService
 
 fun View.isVisible() = visibility == View.VISIBLE
 
@@ -38,15 +38,15 @@ fun View.invisible() {
 }
 
 fun View.showKeyboard() {
-    val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+    val imm = context.getSystemService<InputMethodManager>()
     this.requestFocus()
-    imm.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
+    imm?.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
 }
 
 fun View.hideKeyboard(): Boolean {
     try {
-        val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
-        return imm.hideSoftInputFromWindow(windowToken, 0)
+        val imm = context.getSystemService<InputMethodManager>()
+        return imm?.hideSoftInputFromWindow(windowToken, 0) ?: false
     } catch (ignored: RuntimeException) {
     }
     return false

app/src/main/java/com/aurora/store/data/installer/AppInstaller.kt

@@ -28,6 +28,7 @@ import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Build
 import androidx.annotation.RequiresApi
+import androidx.core.content.getSystemService
 import androidx.core.content.pm.PackageInfoCompat
 import com.aurora.extensions.isOAndAbove
 import com.aurora.extensions.isPAndAbove
@@ -101,10 +102,9 @@ class AppInstaller @Inject constructor(
         }
 
         fun notifyInstallation(context: Context, displayName: String, packageName: String) {
-            val notificationManager =
-                context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+            val notificationManager = context.getSystemService<NotificationManager>()
             val notification = NotificationUtil.getInstallNotification(context, displayName, packageName)
-            notificationManager.notify(packageName.hashCode(), notification)
+            notificationManager!!.notify(packageName.hashCode(), notification)
         }
 
         fun getErrorString(context: Context, status: Int): String {

app/src/main/java/com/aurora/store/data/providers/NativeDeviceInfoProvider.kt

@@ -20,9 +20,9 @@ package com.aurora.store.data.providers
 
 import android.app.ActivityManager
 import android.content.Context
-import android.content.Context.ACTIVITY_SERVICE
 import android.content.res.Configuration
 import android.os.Build
+import androidx.core.content.getSystemService
 import com.aurora.extensions.isHuawei
 import java.util.Properties
 
@@ -77,11 +77,10 @@ class NativeDeviceInfoProvider(val context: Context) {
             //Shared Libraries
             setProperty("SharedLibraries", getSharedLibraries().joinToString(separator = ","))
             //GL Extensions
-            val activityManager =
-                context.getSystemService(ACTIVITY_SERVICE) as ActivityManager
+            val activityManager = context.getSystemService<ActivityManager>()
             setProperty(
                 "GL.Version",
-                activityManager.deviceConfigurationInfo.reqGlEsVersion.toString()
+                activityManager!!.deviceConfigurationInfo.reqGlEsVersion.toString()
             )
             setProperty(
                 "GL.Extensions",

app/src/main/java/com/aurora/store/data/providers/PermissionProvider.kt

@@ -16,6 +16,7 @@ import androidx.activity.result.ActivityResultCallback
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.getSystemService
 import androidx.fragment.app.Fragment
 import com.aurora.extensions.checkManifestPermission
 import com.aurora.extensions.isDomainVerified
@@ -128,9 +129,8 @@ class PermissionProvider : ActivityResultCallback<ActivityResult> {
             PermissionType.INSTALL_UNKNOWN_APPS -> PackageUtil.canRequestPackageInstalls(context)
             PermissionType.DOZE_WHITELIST -> {
                 if (isMAndAbove()) {
-                    val powerManager =
-                        context.getSystemService(Context.POWER_SERVICE) as PowerManager
-                    powerManager.isIgnoringBatteryOptimizations(BuildConfig.APPLICATION_ID)
+                    val powerManager = context.getSystemService<PowerManager>()
+                    powerManager?.isIgnoringBatteryOptimizations(BuildConfig.APPLICATION_ID) ?: false
                 } else {
                     true
                 }

app/src/main/java/com/aurora/store/data/receiver/InstallerStatusReceiver.kt

@@ -25,6 +25,7 @@ import android.content.Intent
 import android.content.pm.PackageInstaller
 import android.util.Log
 import androidx.core.content.IntentCompat
+import androidx.core.content.getSystemService
 import com.aurora.extensions.runOnUiThread
 import com.aurora.store.AuroraApp
 import com.aurora.store.R
@@ -86,15 +87,14 @@ class InstallerStatusReceiver : BroadcastReceiver() {
         displayName: String,
         status: Int
     ) {
-        val notificationManager =
-            context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        val notificationManager = context.getSystemService<NotificationManager>()
         val notification = NotificationUtil.getInstallerStatusNotification(
             context,
             packageName,
             displayName,
             AppInstaller.getErrorString(context, status)
         )
-        notificationManager.notify(packageName.hashCode(), notification)
+        notificationManager!!.notify(packageName.hashCode(), notification)
     }
 
     private fun promptUser(intent: Intent, context: Context) {

app/src/main/java/com/aurora/store/data/work/DownloadWorker.kt

@@ -1,12 +1,12 @@
 package com.aurora.store.data.work
 
 import android.app.NotificationManager
-import android.app.Service
 import android.content.Context
 import android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.util.Log
+import androidx.core.content.getSystemService
 import androidx.hilt.work.HiltWorker
 import androidx.work.CoroutineWorker
 import androidx.work.ForegroundInfo
@@ -79,6 +79,8 @@ class DownloadWorker @AssistedInject constructor(
     private val TAG = DownloadWorker::class.java.simpleName
 
     override suspend fun doWork(): Result {
+        notificationManager = appContext.getSystemService<NotificationManager>()!!
+
         // Bail out immediately if authData is not valid
         if (!authProvider.isSavedAuthDataValid()) {
             Log.e(TAG, "AuthData is not valid, exiting!")
@@ -106,9 +108,6 @@ class DownloadWorker @AssistedInject constructor(
         purchaseHelper = PurchaseHelper(authProvider.authData!!)
             .using(httpClient)
 
-        notificationManager =
-            appContext.getSystemService(Service.NOTIFICATION_SERVICE) as NotificationManager
-
         // Bail out if file list is empty
         download.fileList = download.fileList.ifEmpty {
             purchase(download.packageName, download.versionCode, download.offerType)
@@ -204,9 +203,7 @@ class DownloadWorker @AssistedInject constructor(
                 notifyStatus(DownloadStatus.FAILED)
             }
 
-            with(appContext.getSystemService(Service.NOTIFICATION_SERVICE) as NotificationManager) {
-                cancel(NOTIFICATION_ID)
-            }
+            notificationManager.cancel(NOTIFICATION_ID)
         }
     }
 

app/src/main/java/com/aurora/store/data/work/ExportWorker.kt

@@ -1,11 +1,11 @@
 package com.aurora.store.data.work
 
 import android.app.NotificationManager
-import android.app.Service
 import android.content.Context
 import android.content.pm.PackageManager
 import android.net.Uri
 import android.util.Log
+import androidx.core.content.getSystemService
 import androidx.hilt.work.HiltWorker
 import androidx.work.CoroutineWorker
 import androidx.work.Data
@@ -99,8 +99,7 @@ class ExportWorker @AssistedInject constructor(
         val displayName = inputData.getString(DISPLAY_NAME)
         val versionCode = inputData.getInt(VERSION_CODE, -1)
 
-        notificationManager =
-            appContext.getSystemService(Service.NOTIFICATION_SERVICE) as NotificationManager
+        notificationManager = appContext.getSystemService<NotificationManager>()!!
 
         if (packageName.isNullOrEmpty() || isDownload && versionCode == -1) {
             Log.e(TAG, "Input data is corrupt, bailing out!")

app/src/main/java/com/aurora/store/data/work/UpdateWorker.kt

@@ -3,6 +3,7 @@ package com.aurora.store.data.work
 import android.app.NotificationManager
 import android.content.Context
 import android.util.Log
+import androidx.core.content.getSystemService
 import androidx.hilt.work.HiltWorker
 import androidx.work.Constraints
 import androidx.work.CoroutineWorker
@@ -111,8 +112,7 @@ class UpdateWorker @AssistedInject constructor(
         Log.i(TAG, "Checking for app updates")
 
         val autoUpdatesMode = Preferences.getInteger(appContext, PREFERENCE_UPDATES_AUTO, 3)
-        val notifyManager =
-            appContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        val notificationManager = appContext.getSystemService<NotificationManager>()
 
         // Exit if auto-updates is turned off in settings
         if (autoUpdatesMode == 0) {
@@ -140,7 +140,7 @@ class UpdateWorker @AssistedInject constructor(
                 if (updatesList.isNotEmpty()) {
                     if (autoUpdatesMode == 1) {
                         Log.i(TAG, "Found updates, notifying!")
-                        notifyManager.notify(
+                        notificationManager!!.notify(
                             notificationID,
                             NotificationUtil.getUpdateNotification(appContext, updatesList)
                         )
@@ -159,7 +159,7 @@ class UpdateWorker @AssistedInject constructor(
                                 if (list.isEmpty()) return@let
 
                                 Log.i(TAG, "Found apps that cannot be auto-updated, notifying!")
-                                notifyManager.notify(
+                                notificationManager!!.notify(
                                     notificationID,
                                     NotificationUtil.getUpdateNotification(appContext, list)
                                 )
@@ -167,7 +167,7 @@ class UpdateWorker @AssistedInject constructor(
                         } else {
                             // Fallback to notification if battery optimizations are enabled
                             Log.i(TAG, "Found updates, but battery optimizations are enabled!")
-                            notifyManager.notify(
+                            notificationManager!!.notify(
                                 notificationID,
                                 NotificationUtil.getUpdateNotification(appContext, updatesList)
                             )

app/src/main/java/com/aurora/store/util/NotificationUtil.kt

@@ -1,6 +1,5 @@
 package com.aurora.store.util
 
-import android.app.Application
 import android.app.Notification
 import android.app.NotificationChannel
 import android.app.NotificationManager
@@ -13,6 +12,7 @@ import android.net.Uri
 import android.os.Build
 import androidx.core.app.NotificationCompat
 import androidx.core.app.PendingIntentCompat
+import androidx.core.content.getSystemService
 import androidx.core.os.bundleOf
 import androidx.navigation.NavDeepLinkBuilder
 import androidx.work.WorkManager
@@ -30,8 +30,7 @@ object NotificationUtil {
 
     fun createNotificationChannel(context: Context) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            val notificationManager =
-                context.getSystemService(Application.NOTIFICATION_SERVICE) as NotificationManager
+            val notificationManager = context.getSystemService<NotificationManager>()
             val channels = ArrayList<NotificationChannel>()
             channels.add(
                 NotificationChannel(
@@ -65,7 +64,7 @@ object NotificationUtil {
                     setSound(null, null)
                 }
             )
-            notificationManager.createNotificationChannels(channels)
+            notificationManager!!.createNotificationChannels(channels)
         }
     }
 

app/src/main/java/com/aurora/store/view/ui/preferences/InstallationPreference.kt

@@ -20,11 +20,11 @@
 package com.aurora.store.view.ui.preferences
 
 import android.app.admin.DevicePolicyManager
-import android.content.Context
 import android.content.DialogInterface
 import android.os.Bundle
 import android.view.View
 import androidx.appcompat.widget.Toolbar
+import androidx.core.content.getSystemService
 import androidx.navigation.fragment.findNavController
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
@@ -63,17 +63,16 @@ class InstallationPreference : PreferenceFragmentCompat() {
 
         findPreference<Preference>(PREFERENCE_INSTALLATION_DEVICE_OWNER)?.apply {
             val packageName = context.packageName
-            val devicePolicyManager =
-                context.getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
+            val devicePolicyManager = context.getSystemService<DevicePolicyManager>()
 
-            isVisible = devicePolicyManager.isDeviceOwnerApp(packageName)
+            isVisible = devicePolicyManager?.isDeviceOwnerApp(packageName) ?: false
             setOnPreferenceClickListener {
                 context.showDialog(
                     context.getString(R.string.pref_clear_device_owner_title),
                     context.getString(R.string.pref_clear_device_owner_desc),
                     { _: DialogInterface, _: Int ->
                         @Suppress("DEPRECATION")
-                        devicePolicyManager.clearDeviceOwnerApp(packageName)
+                        devicePolicyManager!!.clearDeviceOwnerApp(packageName)
                         activity?.recreate()
                     },
                     { dialog: DialogInterface, _: Int -> dialog.dismiss() }

app/src/main/java/com/aurora/store/viewmodel/network/NetworkViewModel.kt

@@ -24,6 +24,7 @@ import android.net.ConnectivityManager
 import android.net.Network
 import android.net.NetworkCapabilities
 import android.net.NetworkRequest
+import androidx.core.content.getSystemService
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import com.aurora.extensions.isMAndAbove
@@ -38,8 +39,7 @@ class NetworkViewModel @Inject constructor(
 ) : ViewModel() {
     val status: MutableLiveData<NetworkStatus> = MutableLiveData(NetworkStatus.UNAVAILABLE)
 
-    private val connectivityManager =
-        context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+    private val connectivityManager = context.getSystemService<ConnectivityManager>()
     private val networkCallback = object : ConnectivityManager.NetworkCallback() {
         override fun onAvailable(network: Network) {
             super.onAvailable(network)
@@ -53,11 +53,11 @@ class NetworkViewModel @Inject constructor(
     }
 
     fun register() {
-        connectivityManager.registerNetworkCallback(getNetworkRequest(), networkCallback)
+        connectivityManager?.registerNetworkCallback(getNetworkRequest(), networkCallback)
     }
 
     fun unregister() {
-        connectivityManager.unregisterNetworkCallback(networkCallback)
+        connectivityManager?.unregisterNetworkCallback(networkCallback)
     }
 
     private fun getNetworkRequest(): NetworkRequest {
@@ -70,4 +70,4 @@ class NetworkViewModel @Inject constructor(
 
         return networkRequest.build()
     }
-}
+}