This should fix #34

app/src/main/java/apps/amine/bou/readerforselfoss/AddSourceActivity.kt

@@ -37,7 +37,7 @@ class AddSourceActivity : AppCompatActivity() {
         var api: SelfossApi? = null
 
         try {
-            api = SelfossApi(this)
+            api = SelfossApi(this, this@AddSourceActivity)
         } catch (e: IllegalArgumentException) {
             mustLoginToAddSource()
         }

app/src/main/java/apps/amine/bou/readerforselfoss/HomeActivity.kt

@@ -129,7 +129,7 @@ class HomeActivity : AppCompatActivity(), SearchView.OnQueryTextListener {
 
         mCustomTabActivityHelper = CustomTabActivityHelper()
 
-        api = SelfossApi(this)
+        api = SelfossApi(this, this@HomeActivity)
         items = ArrayList()
 
         mBottomBar = findViewById(R.id.bottomBar) as BottomBar
@@ -700,14 +700,7 @@ class HomeActivity : AppCompatActivity(), SearchView.OnQueryTextListener {
                 return true
             }
             R.id.action_disconnect -> {
-                editor.remove("url")
-                editor.remove("login")
-                editor.remove("password")
-                editor.apply()
-                val intent = Intent(this, LoginActivity::class.java)
-                startActivity(intent)
-                finish()
-                return true
+                return Config.logoutAndRedirect(this, this@HomeActivity, editor)
             }
             R.id.action_share_the_app -> {
                 if (GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(this) == ConnectionResult.SUCCESS) {

app/src/main/java/apps/amine/bou/readerforselfoss/LoginActivity.kt

@@ -56,6 +56,18 @@ class LoginActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_login)
 
+        if (intent.getBooleanExtra("baseUrlFail", false)) {
+            val alertDialog = AlertDialog.Builder(this).create()
+            alertDialog.setTitle(getString(R.string.warning_wrong_url))
+            alertDialog.setMessage(getString(R.string.base_url_error))
+            alertDialog.setButton(
+                AlertDialog.BUTTON_NEUTRAL,
+                "OK",
+                { dialog, _ -> dialog.dismiss() })
+            alertDialog.show()
+        }
+
+
         settings = getSharedPreferences(Config.settingsName, Context.MODE_PRIVATE)
         if (settings.getString("url", "").isNotEmpty()) {
             goToMain()
@@ -177,7 +189,7 @@ class LoginActivity : AppCompatActivity() {
             editor.putString("httpPassword", httpPassword)
             editor.apply()
 
-            val api = SelfossApi(this@LoginActivity)
+            val api = SelfossApi(this, this@LoginActivity)
             api.login().enqueue(object : Callback<SuccessResponse> {
                 private fun preferenceError() {
                     editor.remove("url")

app/src/main/java/apps/amine/bou/readerforselfoss/SourcesActivity.kt

@@ -30,7 +30,7 @@ class SourcesActivity : AppCompatActivity() {
         val mFab = findViewById(R.id.fab) as FloatingActionButton
         val mRecyclerView = findViewById(R.id.activity_sources) as RecyclerView
         val mLayoutManager = LinearLayoutManager(this)
-        val api = SelfossApi(this)
+        val api = SelfossApi(this, this@SourcesActivity)
         var items: ArrayList<Sources> = ArrayList()
 
         mFab.attachToRecyclerView(mRecyclerView)

app/src/main/java/apps/amine/bou/readerforselfoss/api/selfoss/SelfossApi.kt

@@ -1,6 +1,12 @@
 package apps.amine.bou.readerforselfoss.api.selfoss
 
+import android.app.Activity
 import android.content.Context
+import android.content.Intent
+import android.support.v7.app.AlertDialog
+import android.widget.Toast
+import apps.amine.bou.readerforselfoss.LoginActivity
+import apps.amine.bou.readerforselfoss.R
 import java.util.concurrent.ConcurrentHashMap
 
 import com.burgstaller.okhttp.AuthenticationCacheInterceptor
@@ -20,9 +26,9 @@ import apps.amine.bou.readerforselfoss.utils.Config
 
 
 // codebeat:disable[ARITY,TOO_MANY_FUNCTIONS]
-class SelfossApi(c: Context) {
+class SelfossApi(c: Context, callingActivity: Activity) {
 
-    private val service: SelfossService
+    private lateinit var service: SelfossService
     private val config: Config = Config(c)
     private val userName: String
     private val password: String
@@ -59,14 +65,19 @@ class SelfossApi(c: Context) {
                 .setLenient()
                 .create()
 
-        val retrofit =
-            Retrofit
-                .Builder()
-                .baseUrl(config.baseUrl)
-                .client(authenticator.getHttpClien())
-                .addConverterFactory(GsonConverterFactory.create(gson))
-                .build()
-        service = retrofit.create(SelfossService::class.java)
+
+        try {
+            val retrofit =
+                Retrofit
+                    .Builder()
+                    .baseUrl(config.baseUrl)
+                    .client(authenticator.getHttpClien())
+                    .addConverterFactory(GsonConverterFactory.create(gson))
+                    .build()
+            service = retrofit.create(SelfossService::class.java)
+        } catch (e: IllegalArgumentException) {
+            Config.logoutAndRedirect(c, callingActivity, config.settings.edit(), baseUrlFail = true)
+        }
     }
 
     fun login(): Call<SuccessResponse> =

app/src/main/java/apps/amine/bou/readerforselfoss/utils/Config.kt

@@ -1,16 +1,15 @@
 package apps.amine.bou.readerforselfoss.utils
 
+import android.app.Activity
 import android.content.Context
+import android.content.Intent
 import android.content.SharedPreferences
+import apps.amine.bou.readerforselfoss.LoginActivity
 
 
 class Config(c: Context) {
 
-    private val settings: SharedPreferences
-
-    init {
-        this.settings = c.getSharedPreferences(settingsName, Context.MODE_PRIVATE)
-    }
+    val settings: SharedPreferences = c.getSharedPreferences(settingsName, Context.MODE_PRIVATE)
 
     val baseUrl: String
         get() = settings.getString("url", "")
@@ -27,8 +26,24 @@ class Config(c: Context) {
     val httpUserPassword: String
         get() = settings.getString("httpPassword", "")
 
+
     companion object {
         val settingsName = "paramsselfoss"
 
+        fun logoutAndRedirect(c: Context,
+                              callingActivity: Activity,
+                              editor: SharedPreferences.Editor,
+                              baseUrlFail: Boolean = false): Boolean {
+            editor.remove("url")
+            editor.remove("login")
+            editor.remove("password")
+            editor.apply()
+            val intent = Intent(c, LoginActivity::class.java)
+            if (baseUrlFail)
+                intent.putExtra("baseUrlFail", baseUrlFail)
+            c.startActivity(intent)
+            callingActivity.finish()
+            return true
+        }
     }
 }

app/src/main/res/values-nl/strings.xml

@@ -115,4 +115,5 @@
     <string name="drawer_loading">Loading …</string>
     <string name="menu_home_search">Zoeken</string>
     <string name="can_delete_source">Can\'t delete the source...</string>
+    <string name="base_url_error">There was an issue when trying to communicate with your Selfoss Instance. If the issue persists, please get in touch with me.</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -117,4 +117,5 @@
     <string name="drawer_loading">Loading …</string>
     <string name="menu_home_search">Search</string>
     <string name="can_delete_source">Can\'t delete the source...</string>
+    <string name="base_url_error">There was an issue when trying to communicate with your Selfoss Instance. If the issue persists, please get in touch with me.</string>
 </resources>