fix crash in grades screen if qispos is not reachable

* update to android studio 4.1

app/build.gradle

@@ -64,13 +64,12 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9'
-    implementation 'androidx.core:core:1.3.2'
+    implementation 'androidx.core:core-ktx:1.3.2'
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.2'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     implementation 'androidx.security:security-crypto:1.1.0-alpha02'
-    implementation 'androidx.work:work-runtime:2.4.0'
     implementation "androidx.work:work-runtime-ktx:2.4.0"
     implementation 'com.google.android.material:material:1.2.1'
     implementation 'com.google.code.gson:gson:2.8.6'

app/src/main/java/org/mosad/seil0/projectlaogai/fragments/GradesFragment.kt

@@ -66,12 +66,11 @@ class GradesFragment : Fragment() {
             GlobalScope.launch(Dispatchers.Default) {
                 // if the cache is older than 24hr, update blocking
                 val currentTime = System.currentTimeMillis() / 1000
-                if ((currentTime - Preferences.gradesCacheTime) > 86400 && checkQisposStatus()) {
-                    withContext(Dispatchers.Main) {
+                withContext(Dispatchers.Main) {
+                    if ((currentTime - Preferences.gradesCacheTime) > 86400 && checkQisposStatus()) {
                         refreshLayout_Grades.isRefreshing = true
+                        CacheController.updateGrades(context!!).join()
                     }
-
-                    CacheController.updateGrades(context!!).join()
                 }
 
                 addGrades()

app/src/main/java/org/mosad/seil0/projectlaogai/util/NotificationUtils.kt

@@ -11,7 +11,7 @@ import java.util.concurrent.atomic.AtomicInteger
 class NotificationUtils(val context: Context) {
 
     companion object {
-        val CHANNEL_ID_GRADES = "channel_grades"
+        const val CHANNEL_ID_GRADES = "channel_grades"
 
         val id = AtomicInteger(0)
 

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:4.1.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong