diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/TeaIsWarm.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/TeaIsWarm.kt
new file mode 100644
index 0000000..bd728eb
--- /dev/null
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/TeaIsWarm.kt
@@ -0,0 +1,11 @@
+package fr.uca.iut.clfreville2.teaiswarm
+
+import fr.uca.iut.clfreville2.teaiswarm.network.GiteaService
+import fr.uca.iut.clfreville2.teaiswarm.network.RepositoryService
+
+object TeaIsWarm {
+
+    val service: RepositoryService by lazy {
+        GiteaService()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/ActivityListFragment.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/ActivityListFragment.kt
index 7d2d2e6..36d6200 100644
--- a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/ActivityListFragment.kt
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/ActivityListFragment.kt
@@ -17,9 +17,9 @@ import androidx.recyclerview.widget.RecyclerView
 import fr.uca.iut.clfreville2.teaiswarm.R
 import fr.uca.iut.clfreville2.teaiswarm.REPOSITORY_NAME
 import fr.uca.iut.clfreville2.teaiswarm.REPOSITORY_OWNER
+import fr.uca.iut.clfreville2.teaiswarm.TeaIsWarm
 import fr.uca.iut.clfreville2.teaiswarm.model.CommitActivity
 import fr.uca.iut.clfreville2.teaiswarm.model.RepositoryIdentifier
-import fr.uca.iut.clfreville2.teaiswarm.network.GiteaService
 import fr.uca.iut.clfreville2.teaiswarm.network.RepositoryService
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
@@ -28,7 +28,7 @@ import java.io.IOException
 
 class ActivityListFragment : Fragment(R.layout.activity_list) {
 
-    private val service = GiteaService()
+    private val service = TeaIsWarm.service
     var repository: RepositoryIdentifier? = null
     var sha: String? = null
 
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/CodeViewFragment.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/CodeViewFragment.kt
new file mode 100644
index 0000000..1c0404d
--- /dev/null
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/CodeViewFragment.kt
@@ -0,0 +1,33 @@
+package fr.uca.iut.clfreville2.teaiswarm.fragment
+
+import android.os.Bundle
+import android.view.View
+import android.widget.TextView
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
+import fr.uca.iut.clfreville2.teaiswarm.R
+import fr.uca.iut.clfreville2.teaiswarm.REPOSITORY_NAME
+import fr.uca.iut.clfreville2.teaiswarm.REPOSITORY_OWNER
+import fr.uca.iut.clfreville2.teaiswarm.TeaIsWarm
+import fr.uca.iut.clfreville2.teaiswarm.model.RepositoryIdentifier
+import kotlinx.coroutines.launch
+
+class CodeViewFragment : Fragment(R.layout.code_view_fragment) {
+
+    private lateinit var content: TextView
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val service = TeaIsWarm.service
+        val bundle = requireArguments()
+        val repository = RepositoryIdentifier(
+            bundle.getString(REPOSITORY_OWNER)!!,
+            bundle.getString(REPOSITORY_NAME)!!
+        )
+        content = view.findViewById(R.id.code_content_view)
+        viewLifecycleOwner.lifecycleScope.launch {
+            val contents = service.retrieveFileContents(repository, bundle.getString(FILE_PATH)!!)
+            content.text = contents.content
+        }
+    }
+}
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryDetailsFragment.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryDetailsFragment.kt
index ff1b5f4..a2b4fb8 100644
--- a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryDetailsFragment.kt
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryDetailsFragment.kt
@@ -10,16 +10,16 @@ import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.RecyclerView
 import fr.uca.iut.clfreville2.teaiswarm.*
+import fr.uca.iut.clfreville2.teaiswarm.model.FileType
 import fr.uca.iut.clfreville2.teaiswarm.model.RepositoryIdentifier
 import fr.uca.iut.clfreville2.teaiswarm.model.VersionedFile
-import fr.uca.iut.clfreville2.teaiswarm.network.GiteaService
 import kotlinx.coroutines.launch
 
 const val FILE_PATH = "file_path"
 
 class RepositoryDetailsFragment : Fragment(R.layout.repository_details) {
 
-    private val service = GiteaService()
+    private val service = TeaIsWarm.service
     private lateinit var repositoryName: TextView
     private lateinit var repositoryDescription: TextView
     private lateinit var activity: Button
@@ -61,6 +61,14 @@ class RepositoryDetailsFragment : Fragment(R.layout.repository_details) {
             REPOSITORY_NAME to currentRepositoryName,
             FILE_PATH to (currentFilePath ?: "") + file.name
         )
-        findNavController().navigate(R.id.repository_details_fragment, bundle)
+        when (file.type) {
+            FileType.FILE -> {
+                findNavController().navigate(R.id.code_view_fragment, bundle)
+            }
+            FileType.DIR -> {
+                findNavController().navigate(R.id.repository_details_fragment, bundle)
+            }
+            else -> {}
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryListFragment.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryListFragment.kt
index 7ffed64..823fddc 100644
--- a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryListFragment.kt
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/RepositoryListFragment.kt
@@ -12,9 +12,9 @@ import androidx.paging.*
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import fr.uca.iut.clfreville2.teaiswarm.R
+import fr.uca.iut.clfreville2.teaiswarm.TeaIsWarm
 import fr.uca.iut.clfreville2.teaiswarm.adapter.RepositoryListAdapter
 import fr.uca.iut.clfreville2.teaiswarm.model.Repository
-import fr.uca.iut.clfreville2.teaiswarm.network.GiteaService
 import fr.uca.iut.clfreville2.teaiswarm.network.RepositoryService
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.launch
@@ -23,7 +23,7 @@ import java.io.IOException
 
 class RepositoryListFragment(private val username: String, private val onClick: (Repository) -> Unit) : Fragment(R.layout.repository_list) {
 
-    private val service = GiteaService()
+    private val service = TeaIsWarm.service
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/SetupConfigFragment.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/SetupConfigFragment.kt
index 530b0ee..f2766e3 100644
--- a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/SetupConfigFragment.kt
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/fragment/SetupConfigFragment.kt
@@ -5,11 +5,16 @@ import android.os.Bundle
 import android.view.View
 import android.widget.Button
 import android.widget.EditText
+import android.widget.Toast
 import androidx.core.content.edit
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import androidx.navigation.findNavController
 import fr.uca.iut.clfreville2.teaiswarm.R
+import fr.uca.iut.clfreville2.teaiswarm.TeaIsWarm
 import fr.uca.iut.clfreville2.teaiswarm.USERNAME
+import fr.uca.iut.clfreville2.teaiswarm.model.Owner
+import kotlinx.coroutines.launch
 
 class SetupConfigFragment(private val preferences: SharedPreferences) : Fragment(R.layout.setup_config) {
 
@@ -21,10 +26,22 @@ class SetupConfigFragment(private val preferences: SharedPreferences) : Fragment
         usernameInput = view.findViewById(R.id.username_input)
         confirmButton = view.findViewById(R.id.configure_button)
         confirmButton.setOnClickListener {
-            preferences.edit {
-                putString(USERNAME, usernameInput.text.toString())
+            val username = usernameInput.text.toString()
+            lifecycleScope.launch {
+                val owner = TeaIsWarm.service.searchOwner(username)
+                if (owner is Owner) {
+                    preferences.edit {
+                        putString(USERNAME, usernameInput.text.toString())
+                    }
+                    view.findNavController().navigate(R.id.repository_list_fragment)
+                } else {
+                    Toast.makeText(
+                        view.context,
+                        resources.getText(R.string.owner_not_found),
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
             }
-            view.findNavController().navigate(R.id.repository_list_fragment)
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/model/FileContent.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/model/FileContent.kt
new file mode 100644
index 0000000..7caccae
--- /dev/null
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/model/FileContent.kt
@@ -0,0 +1,3 @@
+package fr.uca.iut.clfreville2.teaiswarm.model
+
+data class FileContent(val type: FileType, val size: Int, val content: String, val last_commit_sha: String)
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/GiteaService.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/GiteaService.kt
index 356dd54..7069450 100644
--- a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/GiteaService.kt
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/GiteaService.kt
@@ -8,6 +8,7 @@ import fr.uca.iut.clfreville2.teaiswarm.model.*
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import okhttp3.OkHttpClient
+import retrofit2.HttpException
 import retrofit2.Retrofit
 import retrofit2.converter.moshi.MoshiConverterFactory
 import retrofit2.http.GET
@@ -15,6 +16,8 @@ import retrofit2.http.Path
 import retrofit2.http.Query
 import java.util.*
 
+const val HTTP_NOT_FOUND = 404;
+
 interface GiteaApiService {
 
     @GET("users/{username}/repos")
@@ -25,6 +28,12 @@ interface GiteaApiService {
 
     @GET("repos/{owner}/{repo}/contents/{filePath}")
     suspend fun listFileContents(@Path("owner") owner: String, @Path("repo") repo: String, @Path("filePath") filePath: String): List<VersionedFile>
+
+    @GET("repos/{owner}/{repo}/contents/{filePath}")
+    suspend fun retrieveFileContents(@Path("owner") owner: String, @Path("repo") repo: String, @Path("filePath") filePath: String): FileContent
+
+    @GET("users/{owner}")
+    suspend fun searchOwner(@Path("owner") owner: String): Owner?
 }
 
 class GiteaService(private val handle: GiteaApiService) : RepositoryService {
@@ -54,6 +63,23 @@ class GiteaService(private val handle: GiteaApiService) : RepositoryService {
     override suspend fun listFileContents(repository: RepositoryIdentifiable, filePath: String): List<VersionedFile> = withContext(Dispatchers.IO) {
         handle.listFileContents(repository.identifier.owner, repository.identifier.name, filePath)
     }
+
+    override suspend fun retrieveFileContents(
+        repository: RepositoryIdentifiable,
+        filePath: String
+    ): FileContent = withContext(Dispatchers.IO) {
+        handle.retrieveFileContents(repository.identifier.owner, repository.identifier.name, filePath)
+    }
+
+    override suspend fun searchOwner(owner: String): Owner? = try {
+        handle.searchOwner(owner)
+    } catch (ex: HttpException) {
+        if (ex.code() == HTTP_NOT_FOUND) {
+            null
+        } else {
+            throw ex
+        }
+    }
 }
 
 private const val CODEFIRST_API_BASE = "https://codefirst.iut.uca.fr/git/api/v1/"
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/RepositoryService.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/RepositoryService.kt
index ec53bcd..ed96c96 100644
--- a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/RepositoryService.kt
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/RepositoryService.kt
@@ -9,4 +9,8 @@ interface RepositoryService {
     suspend fun listCommits(repository: RepositoryIdentifiable, sha: String?, page: Int): List<CommitActivity>
 
     suspend fun listFileContents(repository: RepositoryIdentifiable, filePath: String): List<VersionedFile>
+
+    suspend fun retrieveFileContents(repository: RepositoryIdentifiable, filePath: String): FileContent
+
+    suspend fun searchOwner(owner: String): Owner?
 }
diff --git a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/StubRepositoryService.kt b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/StubRepositoryService.kt
index bb94e1b..758f6b2 100644
--- a/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/StubRepositoryService.kt
+++ b/app/src/main/java/fr/uca/iut/clfreville2/teaiswarm/network/StubRepositoryService.kt
@@ -55,6 +55,20 @@ class StubRepositoryService : RepositoryService {
             "CONVENTIONS.md",
             "README.md"
         ).map { VersionedFile(it, if (it.contains(".")) { FileType.FILE } else { FileType.DIR }) }
+
+    // See KT-2425
+    override suspend fun retrieveFileContents(
+        repository: RepositoryIdentifiable,
+        filePath: String
+    ) = FileContent(
+        FileType.FILE, 82, """
+        #!/bin/bash
+        container_id=$(docker run --detach nginx)
+        docker stop ${'$'}container_id""", randomCommitSha()
+    )
+
+    override suspend fun searchOwner(owner: String): Owner =
+        Owner(1, owner)
 }
 
 val CHAR_POOL = "abcdefghijklmnopqrstuvwxyz0123456789".toCharArray();
diff --git a/app/src/main/res/layout/code_view_fragment.xml b/app/src/main/res/layout/code_view_fragment.xml
new file mode 100644
index 0000000..4efd27a
--- /dev/null
+++ b/app/src/main/res/layout/code_view_fragment.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/code_content_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+</LinearLayout>
diff --git a/app/src/main/res/layout/setup_config.xml b/app/src/main/res/layout/setup_config.xml
index 6334e1f..27694c1 100644
--- a/app/src/main/res/layout/setup_config.xml
+++ b/app/src/main/res/layout/setup_config.xml
@@ -4,20 +4,27 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <EditText
-        android:id="@+id/username_input"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        app:layout_constraintBottom_toTopOf="@+id/configure_button"
-        android:autofillHints="" />
-
-    <Button
-        android:id="@+id/configure_button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/configure"
+        android:orientation="vertical"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent" />
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <EditText
+            android:id="@+id/username_input"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:autofillHints=""
+            app:layout_constraintBottom_toTopOf="@+id/configure_button" />
+
+        <Button
+            android:id="@+id/configure_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/configure" />
+    </LinearLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/navigation/nav_graph.xml b/app/src/main/res/navigation/nav_graph.xml
index 51b6252..71d85b2 100644
--- a/app/src/main/res/navigation/nav_graph.xml
+++ b/app/src/main/res/navigation/nav_graph.xml
@@ -28,4 +28,8 @@
         android:id="@+id/repository_details_fragment"
         android:name="fr.uca.iut.clfreville2.teaiswarm.fragment.RepositoryDetailsFragment"
         android:label="RepositoryDetailsFragment" />
+    <fragment
+        android:id="@+id/code_view_fragment"
+        android:name="fr.uca.iut.clfreville2.teaiswarm.fragment.CodeViewFragment"
+        android:label="CodeViewFragment" />
 </navigation>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 4c6ae95..d9a437e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -14,4 +14,5 @@
     <string name="username">Username</string>
     <string name="configure">Configure</string>
     <string name="activity">Activity</string>
+    <string name="owner_not_found">User not found</string>
 </resources>
\ No newline at end of file