Created Login with Retrofit and store Token (with exceptions)

android/app/build.gradle

@@ -45,4 +45,7 @@ dependencies {
     implementation 'androidx.navigation:navigation-ui-ktx:2.2.2'
     implementation "android.arch.navigation:navigation-fragment-ktx:2.2.2"
     implementation "android.arch.navigation:navigation-ui-ktx:2.2.2"
+
+    implementation 'com.squareup.retrofit2:retrofit:2.1.0'
+    implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
 }

android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="de.hft.geotracker">
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <application
         android:allowBackup="true"
@@ -9,6 +10,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+
         <activity android:name=".Register"></activity>
         <activity
             android:name=".Settings"

android/app/src/main/java/de/hft/geotracker/GeofenceService.kt

@@ -0,0 +1,15 @@
+package de.hft.geotracker
+
+import retrofit2.Call
+import retrofit2.http.GET
+import retrofit2.http.Path
+import retrofit2.http.Query
+
+interface GeofenceService {
+    @GET("/login?username=user&password=pw")
+    fun login(@Query("user") user : String,
+              @Query("pw") password : String) : Call<String>
+
+
+
+}

android/app/src/main/java/de/hft/geotracker/JWToken.kt

@@ -0,0 +1,3 @@
+package de.hft.geotracker
+
+data class JWToken (var token : String)

android/app/src/main/java/de/hft/geotracker/Login.kt

@@ -5,6 +5,17 @@ import android.os.Bundle
 import androidx.fragment.app.Fragment
 import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import okhttp3.OkHttpClient
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import java.net.HttpRetryException
 
 /**
  * A simple [Fragment] subclass.
@@ -12,9 +23,18 @@ import androidx.appcompat.app.AppCompatActivity
 class Login  : AppCompatActivity() {
     lateinit var login : TextView
     lateinit var reg : TextView
+    lateinit var service : GeofenceService
+    lateinit var token : JWToken
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_login)
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl("http://localhost:5000")
+            .addConverterFactory(GsonConverterFactory.create())
+            .build()
+        service = retrofit.create(GeofenceService::class.java)
+
         login = findViewById(R.id.button_create_account)
         login.setOnClickListener {
             login()
@@ -31,7 +51,24 @@ class Login  : AppCompatActivity() {
     }
 
     private fun login() {
-        val intent = Intent(this, MainActivity::class.java)
-        startActivity(intent)
+        var call : Call<String> = service.login("wito","tobias")
+        call.enqueue(object : Callback<String> {
+            override fun onResponse(call: Call<String>?, response: Response<String>?) {
+                if(response != null && response.isSuccessful) {
+                    response.body()
+                    token = JWToken(call.toString())
+                    println("Erfolg")
+                } else {
+                    println("Fehler1")
+                }
+            }
+
+            override fun onFailure(call: Call<String>?, t: Throwable?) {
+                println("Fehler2 ${t.toString()}")
+            }
+        })
+//        var token = call.execute().body()
+//        val intent = Intent(this, MainActivity::class.java)
+//        startActivity(intent)
     }
 }