Fix some warnings

app/src/main/java/de/sebse/fuplanner2/auth/FUAuthModule.kt

@@ -5,8 +5,8 @@ import com.android.volley.Header
 import de.sebse.fuplanner2.database.User
 import de.sebse.fuplanner2.network.NetData
 import de.sebse.fuplanner2.network.Requester
-import de.sebse.fuplanner2.network.tools.invalidPassword
+import de.sebse.fuplanner2.network.Tools.invalidPassword
-import de.sebse.fuplanner2.network.tools.invalidResponse
+import de.sebse.fuplanner2.network.Tools.invalidResponse
 import de.sebse.fuplanner2.utils.xml
 import java.net.URI
 import java.util.concurrent.TimeUnit

app/src/main/java/de/sebse/fuplanner2/blackboard/Blackboard.kt

@@ -10,7 +10,7 @@ import de.sebse.fuplanner2.auth.SamlReponse
 import de.sebse.fuplanner2.database.User
 import de.sebse.fuplanner2.network.NetData
 import de.sebse.fuplanner2.network.Requester
-import de.sebse.fuplanner2.network.tools.invalidResponse
+import de.sebse.fuplanner2.network.Tools.invalidResponse
 import java.net.URI
 import java.util.concurrent.TimeUnit
 import kotlin.random.Random

app/src/main/java/de/sebse/fuplanner2/network/CustomRequest.kt

@@ -1,6 +1,5 @@
 package de.sebse.fuplanner2.network
 
-import android.os.Build
 import androidx.annotation.GuardedBy
 import com.android.volley.*
 import com.android.volley.toolbox.HttpHeaderParser
@@ -107,11 +106,7 @@ class CustomRequest: Request<NetData> {
                 }
             }
             val requestBody = sb.toString()
-            return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+            return requestBody.toByteArray(StandardCharsets.UTF_8)
-                requestBody.toByteArray(StandardCharsets.UTF_8)
-            } else {
-                requestBody.toByteArray()
-            }
         }
         return null
     }

app/src/main/java/de/sebse/fuplanner2/network/NetData.kt

@@ -2,5 +2,5 @@ package de.sebse.fuplanner2.network
 import com.android.volley.NetworkResponse
 
 data class NetData(val body: String, val networkResponse: NetworkResponse) {
-    val headers = networkResponse.headers
+    val headers: Map<String, String>? = networkResponse.headers
 }

app/src/main/java/de/sebse/fuplanner2/network/Requester.kt

@@ -5,6 +5,7 @@ import android.os.Build
 import com.android.volley.Request
 import com.android.volley.RequestQueue
 import com.android.volley.Response
+import com.android.volley.toolbox.HttpResponse
 import com.android.volley.toolbox.HttpStack
 import com.android.volley.toolbox.HurlStack
 import com.android.volley.toolbox.Volley
@@ -22,7 +23,7 @@ import kotlin.coroutines.resume
 class Requester(ctx: Context) {
     private var requestQueue: RequestQueue = Volley.newRequestQueue(ctx, object : HurlStack() {
         @Throws(IOException::class)
-        override fun createConnection(url: URL?): HttpURLConnection? {
+        override fun createConnection(url: URL?): HttpURLConnection {
             val connection: HttpURLConnection = super.createConnection(url)
             connection.instanceFollowRedirects = false
             return connection
@@ -31,21 +32,27 @@ class Requester(ctx: Context) {
 
     suspend fun get(url: String, cookies: Map<String, String>?): NetData {
         return suspendCancellableCoroutine { cont ->
-            val request = CustomRequest(Request.Method.GET, url, cookies, Response.Listener { response -> cont.resume(response) }, Response.ErrorListener { error -> cont.cancel(error) })
+            val request = CustomRequest(Request.Method.GET, url, cookies,
+                { response -> cont.resume(response) },
+                { error -> cont.cancel(error) })
             requestQueue.add(request)
         }
     }
 
     suspend fun head(url: String, cookies: Map<String, String>?): NetData {
         return suspendCancellableCoroutine { cont ->
-            val request = CustomRequest(Request.Method.HEAD, url, cookies, Response.Listener { response -> cont.resume(response) }, Response.ErrorListener { error -> cont.cancel(error) })
+            val request = CustomRequest(Request.Method.HEAD, url, cookies,
+                { response -> cont.resume(response) },
+                { error -> cont.cancel(error) })
             requestQueue.add(request)
         }
     }
 
     suspend fun post(url: String, cookies: Map<String, String>?, data: Map<String, String>?): NetData {
         return suspendCancellableCoroutine { cont ->
-            val request = CustomRequest(Request.Method.POST, url, cookies, data, Response.Listener { response -> cont.resume(response) }, Response.ErrorListener { error -> cont.cancel(error) })
+            val request = CustomRequest(Request.Method.POST, url, cookies, data,
+                { response -> cont.resume(response) },
+                { error -> cont.cancel(error) })
             requestQueue.add(request)
         }
     }

app/src/main/java/de/sebse/fuplanner2/network/Tools.kt

@@ -4,7 +4,7 @@ import com.android.volley.NetworkResponse
 import com.android.volley.VolleyError
 import de.sebse.fuplanner2.utils.console
 
-object tools {
+object Tools {
     fun invalidResponse(uid: Int, status: String): VolleyError {
         console.warn("InvalidResponse", "$uid - $status")
         return VolleyError(NetworkResponse(422, null, true, 0, null))

app/src/main/java/de/sebse/fuplanner2/whiteboard/Whiteboard.kt

@@ -10,8 +10,7 @@ import de.sebse.fuplanner2.auth.SamlReponse
 import de.sebse.fuplanner2.database.User
 import de.sebse.fuplanner2.network.NetData
 import de.sebse.fuplanner2.network.Requester
-import de.sebse.fuplanner2.network.tools.invalidResponse
+import de.sebse.fuplanner2.network.Tools.invalidResponse
-import de.sebse.fuplanner2.utils.console
 
 object Whiteboard: FUAuthModule() {
     private const val LOGIN_URL = "https://mycampus.imp.fu-berlin.de/sakai-login-tool/container"