diff --git a/app/build.gradle b/app/build.gradle
index 6569b5e..2a144f5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -12,6 +12,13 @@ android {
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
+
+        debug {
+            buildConfigField "String", "api_url", "\"http://devweb.local/comunic/api/\""
+            buildConfigField "String", "api_service_name", "testService"
+            buildConfigField "String", "api_service_token", "testPasswd"
+        }
+
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6b756d3..dff6697 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.communiquons.android.comunic.client">
 
+    <!-- Internet access is required to access the API -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+
+
     <application
         android:allowBackup="true"
         android:fullBackupContent="@xml/backup_scheme"
diff --git a/app/src/main/java/org/communiquons/android/comunic/client/APIParameters.java b/app/src/main/java/org/communiquons/android/comunic/client/APIParameters.java
new file mode 100644
index 0000000..b4a59cd
--- /dev/null
+++ b/app/src/main/java/org/communiquons/android/comunic/client/APIParameters.java
@@ -0,0 +1,46 @@
+package org.communiquons.android.comunic.client;
+
+import java.util.ArrayList;
+
+/**
+ * This class handles the setup of the parametres required to setup an API request
+ *
+ * Created by pierre on 10/31/17.
+ */
+
+class APIParameters {
+
+    /**
+     * Parameters of the request
+     */
+    private ArrayList<APIPostData> parameters;
+
+    /**
+     * The URI on the server
+     */
+    private String request_uri;
+
+    /**
+     * The class constructor
+     *
+     * @param uri The request URI on the server
+     */
+    APIParameters(String uri){
+        //Save request URI
+        request_uri = uri;
+
+        //Intializate parametres array
+        parameters = new ArrayList<>();
+    }
+
+    /**
+     * Add a new parameter to the request
+     *
+     * @param name The name of the new key
+     * @param value The value of the new key
+     */
+    void addParameter(String name, String value){
+        parameters.add(new APIPostData(name, value));
+    }
+
+}
diff --git a/app/src/main/java/org/communiquons/android/comunic/client/APIPostData.java b/app/src/main/java/org/communiquons/android/comunic/client/APIPostData.java
new file mode 100644
index 0000000..27eb401
--- /dev/null
+++ b/app/src/main/java/org/communiquons/android/comunic/client/APIPostData.java
@@ -0,0 +1,57 @@
+package org.communiquons.android.comunic.client;
+
+import java.net.URLEncoder;
+
+/**
+ * This class stores on parameter for a POST request
+ *
+ * Created by pierre on 10/31/17.
+ */
+
+class APIPostData {
+
+    /**
+     * The name of the key
+     */
+    private String key_name;
+
+    /**
+     * The value of the key
+     */
+    private String key_value;
+
+    /**
+     * Public constructor of the class
+     *
+     * @param name The name of the parameter
+     * @param value The value of the parameter
+     */
+    APIPostData(String name, String value){
+        key_name = name;
+        key_value = value;
+    }
+
+    /**
+     * Get the the name and the value of the key in an encoded form
+     *
+     * @return The result
+     */
+    String get_encoded(){
+
+        String encoded_key;
+        String encoded_value;
+
+        try {
+            encoded_key = URLEncoder.encode(key_name, "UTF-8");
+            encoded_value = URLEncoder.encode(key_value, "UTF-8");
+        } catch (java.io.UnsupportedEncodingException e){
+            e.printStackTrace();
+
+            return "";
+        }
+
+        //Return result
+        return encoded_key + "&" + encoded_value;
+    }
+
+}
diff --git a/app/src/main/java/org/communiquons/android/comunic/client/APIRequestTask.java b/app/src/main/java/org/communiquons/android/comunic/client/APIRequestTask.java
new file mode 100644
index 0000000..4fcddb0
--- /dev/null
+++ b/app/src/main/java/org/communiquons/android/comunic/client/APIRequestTask.java
@@ -0,0 +1,15 @@
+package org.communiquons.android.comunic.client;
+
+import android.os.AsyncTask;
+
+import org.json.JSONObject;
+
+/**
+ * Created by pierre on 10/31/17.
+ */
+
+abstract class APIRequestTask extends AsyncTask<APIParameters, Void, JSONObject> {
+
+
+
+}
diff --git a/app/src/main/java/org/communiquons/android/comunic/client/LoginActivity.java b/app/src/main/java/org/communiquons/android/comunic/client/LoginActivity.java
index 10da188..d7c82be 100644
--- a/app/src/main/java/org/communiquons/android/comunic/client/LoginActivity.java
+++ b/app/src/main/java/org/communiquons/android/comunic/client/LoginActivity.java
@@ -2,12 +2,68 @@ package org.communiquons.android.comunic.client;
 
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.Toast;
 
 public class LoginActivity extends AppCompatActivity {
 
+    /**
+     * Utilities object
+     */
+    private Utilities utils;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_login);
+
+        //Create utilities object
+        utils = new Utilities(this);
+
+        //Make login submit button lives
+        findViewById(R.id.login_submit).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+                //Submit login form
+                submitLogin();
+
+            }
+        });
+
+
+    }
+
+    /**
+     * Handle login form submission
+     */
+    void submitLogin(){
+
+        //Get the fields
+        EditText login_mail = (EditText) findViewById(R.id.email_field);
+        EditText login_password = (EditText) findViewById(R.id.password_field);
+
+        int stop = 0;
+
+        //Check password
+        if(login_password.length()<3){
+            login_password.setError(getString(R.string.activity_login_err_invalid_password));
+            login_password.requestFocus();
+            stop = 1;
+        }
+
+        //Check email address
+        if(login_mail.length() < 3 || !utils.isValidMail(login_mail.getText())){
+            login_mail.setError(getString(R.string.activity_login_err_invalid_email));
+            login_mail.requestFocus();
+            stop = 1;
+        }
+
+        //Stop if required
+        if(stop != 0)
+            return;
+
+
     }
 }
diff --git a/app/src/main/java/org/communiquons/android/comunic/client/Utilities.java b/app/src/main/java/org/communiquons/android/comunic/client/Utilities.java
index ddae22d..7de5149 100644
--- a/app/src/main/java/org/communiquons/android/comunic/client/Utilities.java
+++ b/app/src/main/java/org/communiquons/android/comunic/client/Utilities.java
@@ -1,7 +1,9 @@
 package org.communiquons.android.comunic.client;
 
 import android.content.Context;
+import android.text.TextUtils;
 import android.util.Log;
+import android.util.Patterns;
 
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
@@ -91,4 +93,14 @@ class Utilities {
         //Success
         return true;
     }
+
+    /**
+     * Check whether a specified email address is valid or not
+     *
+     * @param mail The E-Mail address to check
+     * @return True if the mail is valid / false else
+     */
+    boolean isValidMail(CharSequence mail){
+        return !TextUtils.isEmpty(mail) && Patterns.EMAIL_ADDRESS.matcher(mail).matches();
+    }
 }
diff --git a/app/src/main/res/layout/activity_login.xml b/app/src/main/res/layout/activity_login.xml
index 3da19c1..0f2d98d 100644
--- a/app/src/main/res/layout/activity_login.xml
+++ b/app/src/main/res/layout/activity_login.xml
@@ -65,6 +65,7 @@
 
             <!-- Sign in button -->
             <Button
+                android:id="@+id/login_submit"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="8dp"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6db72ee..ac6fe86 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -4,4 +4,6 @@
     <string name="activity_login_email_hint">Email address</string>
     <string name="activity_login_password_hint">Password</string>
     <string name="activity_login_submit_form">Login</string>
+    <string name="activity_login_err_invalid_password">The password is invalid!</string>
+    <string name="activity_login_err_invalid_email">The email specified is invalid !</string>
 </resources>