Create login layout file

app/build.gradle

@@ -26,5 +26,6 @@ dependencies {
     })
     compile 'com.android.support:appcompat-v7:26.+'
     compile 'com.android.support.constraint:constraint-layout:1.0.2'
+    compile 'com.android.support:design:26.+'
     testCompile 'junit:junit:4.12'
 }

app/src/main/AndroidManifest.xml

@@ -17,6 +17,8 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".LoginActivity"
+            android:label="@string/activity_login_header"></activity>
     </application>
 
 </manifest>

app/src/main/java/org/communiquons/android/comunic/client/Account.java

@@ -46,17 +46,8 @@ class Account {
         mContext = context;
         utils = new Utilities(context);
 
-        //Initializate tokens array
+        //Initialize tokens array
         tokens = new ArrayList<>();
-
-        //Debug test
-        /*ArrayList<String> tokens = new ArrayList<>();
-        tokens.add("cXNkZjVxNnM1NGRmNTRxczZkNGZxc2RmNAo");
-        tokens.add("cXNkZjVxNnM1cXM4ZDdmODdxczhkZ3FzZGp");
-        save_new_tokens(tokens);
-        Log.v("Account", utils.file_get_content(tokFilename));
-
-        Log.v("Account", "You are signed in: " + (signed_in() ? "Yes" : "No"));*/
     }
 
     /**

app/src/main/java/org/communiquons/android/comunic/client/LoginActivity.java

@@ -0,0 +1,13 @@
+package org.communiquons.android.comunic.client;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+
+public class LoginActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_login);
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/MainActivity.java

@@ -1,5 +1,6 @@
 package org.communiquons.android.comunic.client;
 
+import android.content.Intent;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 
@@ -15,6 +16,15 @@ public class MainActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
+        //Initialize account object
         account = new Account(this);
+
+        //Check if user is signed in or not
+        if(!account.signed_in()){
+
+            //Open the login activity
+            Intent intent = new Intent(this, LoginActivity.class);
+            startActivity(intent);
+        }
     }
 }

app/src/main/res/layout/activity_login.xml

@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_gravity="center_horizontal"
+    android:layout_marginBottom="16dp"
+    android:layout_marginEnd="16dp"
+    android:layout_marginStart="16dp"
+    android:layout_marginTop="16dp"
+    android:orientation="vertical"
+    tools:context="org.communiquons.android.comunic.client.LoginActivity">
+
+    <!-- Login loading progress -->
+    <ProgressBar
+        android:id="@+id/progress_bar"
+        style="?android:attr/progressBarStyleLarge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:visibility="gone"/>
+
+    <!-- Login form -->
+    <ScrollView
+        android:id="@+id/login_form"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <!-- Email field -->
+            <android.support.design.widget.TextInputLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <EditText
+                    android:id="@+id/email_field"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:hint="@string/activity_login_email_hint"
+                    android:inputType="textEmailAddress"
+                    />
+
+            </android.support.design.widget.TextInputLayout>
+
+            <!-- Password field -->
+            <android.support.design.widget.TextInputLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp">
+
+                <EditText
+                    android:id="@+id/password_field"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:hint="@string/activity_login_password_hint"
+                    android:inputType="textPassword"
+                    />
+
+            </android.support.design.widget.TextInputLayout>
+
+
+            <!-- Sign in button -->
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:text="@string/activity_login_submit_form"/>
+
+        </LinearLayout>
+
+    </ScrollView>
+
+</LinearLayout>

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

@@ -1,3 +1,7 @@
 <resources>
     <string name="app_name">Comunic</string>
+    <string name="activity_login_header">Login</string>
+    <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>
 </resources>