almost finished android app

src/apps/Android/app/src/main/java/com/janishutz/libreevent/ApiClient.kt

@@ -19,7 +19,6 @@ class ApiClient {
 
             // Set request headers (if needed)
             connection.setRequestProperty("Content-Type", "application/json")
-            // Add other headers as needed
 
             // Enable input and output streams for the connection
             connection.doInput = true
@@ -60,7 +59,11 @@ class ApiClient {
     }
 
     fun checkTicket(apiUrl: String, username: String, password: String, ticket: String): String {
-        val url = URL("https://$apiUrl/app/ticketLookup")
+        var url = URL("$apiUrl/app/ticketLookup")
+        if ( !apiUrl.contains( "https://" )) {
+            url = URL("https://$apiUrl/app/ticketLookup")
+        }
+
         val connection = url.openConnection() as HttpURLConnection
 
         // Set the request method to POST
@@ -68,14 +71,13 @@ class ApiClient {
 
         // Set request headers (if needed)
         connection.setRequestProperty("Content-Type", "application/json")
-        // Add other headers as needed
 
         // Enable input and output streams for the connection
         connection.doInput = true
         connection.doOutput = true
 
         // Create the JSON request body
-        val jsonRequest = "{\"email\":\"$username\",\"password\":\"$password\",\"ticketID\":$ticket}"
+        val jsonRequest = "{\"email\":\"$username\",\"password\":\"$password\",\"ticketID\":\"$ticket\"}"
 
         // Write the JSON data to the output stream
         val outputStream = DataOutputStream(connection.outputStream)
@@ -99,9 +101,16 @@ class ApiClient {
             // Return the response as a String
             return response.toString()
         } else {
-            // Handle the error (e.g., authentication failed)
-            // You can also throw an exception here if needed
-            return ""
+            val r = BufferedReader(InputStreamReader(connection.errorStream))
+            val res = StringBuilder()
+            var line: String?
+            while (r.readLine().also { line = it } != null) {
+                res.append(line)
+            }
+            r.close()
+            println(res.toString())
+
+            return "Error"
         }
     }
 }

src/apps/Android/app/src/main/java/com/janishutz/libreevent/MainActivity.kt

@@ -18,7 +18,7 @@ class MainActivity : AppCompatActivity() {
         val policy = ThreadPolicy.Builder().permitAll().build()
         StrictMode.setThreadPolicy(policy)
 
-        val sharedPref = getSharedPreferences( "login", MODE_PRIVATE )
+        val sharedPref = applicationContext.getSharedPreferences( "login", MODE_PRIVATE )
 
         val hasSwitched = intent.hasExtra("hasSwitched")
 
@@ -50,7 +50,7 @@ class MainActivity : AppCompatActivity() {
         val res = ApiClient().authenticateUser( url, username, password )
         println( res )
         if ( res == "authOk" ) {
-            val sharedPref = getSharedPreferences( "login", MODE_PRIVATE )
+            val sharedPref = applicationContext.getSharedPreferences( "login", MODE_PRIVATE )
             val editor = sharedPref.edit()
             editor.putString( "username", username )
             editor.putString( "password", password )

src/apps/Android/app/src/main/java/com/janishutz/libreevent/ScannerActivity.kt

@@ -27,11 +27,10 @@ class ScannerActivity : CaptureActivity() {
 
         val logoutButton = findViewById<Button>(R.id.logoutButton)
         logoutButton.setOnClickListener {
-            val sharedPref = getSharedPreferences( "login", MODE_PRIVATE )
+            val sharedPref = applicationContext.getSharedPreferences( "login", MODE_PRIVATE )
             val editor = sharedPref.edit()
+            editor.remove( "password" )
             editor.remove( "loginOk" )
-            editor.remove( "username" )
-            editor.remove( "url" )
             editor.apply()
             val switchIntent = Intent(this, MainActivity::class.java)
             switchIntent.putExtra("hasSwitched", true)
@@ -63,12 +62,29 @@ class ScannerActivity : CaptureActivity() {
 
     private fun handleScanResult(result: String) {
         if ( lastScanned != result ) {
-            val sharedPref = getSharedPreferences( "login", MODE_PRIVATE )
+            val sharedPref = applicationContext.getSharedPreferences( "login", MODE_PRIVATE )
 
-            ApiClient().checkTicket( sharedPref.getString( "url", null ).toString(),
+            val status = ApiClient().checkTicket( sharedPref.getString( "url", null ).toString(),
                 sharedPref.getString( "username", null ).toString(),
                 sharedPref.getString( "password", null ).toString(), result )
             lastScanned = result
+            val alertDialogBuilder = AlertDialog.Builder(this)
+
+            if ( status == "ticketValid" ) {
+                alertDialogBuilder.setTitle("Ticket is valid")
+            } else if ( status == "ticketInvalid" ) {
+                alertDialogBuilder.setTitle("Ticket is invalid")
+            } else if ( status == "Error" ) {
+                alertDialogBuilder.setTitle("There was an error connecting")
+                alertDialogBuilder.setMessage("Please log out and log in again")
+            }
+
+            alertDialogBuilder.setIcon(android.R.drawable.ic_dialog_alert)
+
+            alertDialogBuilder.setPositiveButton("OK") { dialog, _ ->
+                dialog.dismiss()
+            }
+            alertDialogBuilder.show()
         }
     }