working on several issues

android/Pictogram/commonlibrary/src/main/res/values-en/strings.xml

@@ -47,6 +47,8 @@
     <string name="exitingApp">Exiting the app</string>
     <string name="serverError">There is a server error. Try again later</string>
     <string name="firstlogin">Login by using your user and password. In other case, register as new user on the website </string>
+    <string name="addStudent">Add student</string>
+    <string name="getLicenseStudent">Please, enter a student license</string>
 
     <!--Semantic grammar -->
     <string name="loadingGrammar">Please wait, loading vocabulary</string>

android/Pictogram/commonlibrary/src/main/res/values-es/strings.xml

@@ -49,7 +49,8 @@
     <string name="exitingApp">Saliendo de la aplicación</string>
     <string name="serverError">Fallo accediendo al Servidor. Inténtelo más tarde</string>
     <string name="firstlogin">Por favor, introduzca su usuario y clave, o bien registrese en </string>
-
+    <string name="addStudent">Añadir estudiante</string>
+    <string name="getLicenseStudent">Por favor, introduzca el número de licencia del estudiante</string>
     <!--Semantic grammar -->
     <string name="loadingGrammar">Por favor espere, cargando vocabulario</string>
 

android/Pictogram/commonlibrary/src/main/res/values/strings.xml

@@ -50,6 +50,9 @@
     <string name="exitingApp">Saliendo de la aplicación</string>
     <string name="serverError">Error en el servidor de datos. Inténtelo más tarde</string>
     <string name="firstlogin">Por favor, introduzca su usuario y clave, o bien registrese en </string>
+    <string name="addStudent">Añadir estudiante</string>
+    <string name="getLicenseStudent">Por favor, introduzca el número de licencia del estudiante</string>
+
     <!--Semantic grammar -->
     <string name="loadingGrammar">Please wait, loading vocabulary</string>
 

android/Pictogram/tabletlibrary/src/main/java/com/yottacode/pictogram/tabletlibrary/gui/login/CustomList.java

@@ -74,7 +74,7 @@ public class CustomList extends ArrayAdapter<String>{
 
         //}
         //imageView.setImageResource(R.drawable.user);
-        if (images.size()>0){
+        if (images.elementAt(position)!=null){
             imageView.setImageBitmap(images.elementAt(position));
         }else{
             imageView.setImageResource(R.drawable.anonymous_student);

android/Pictogram/tabletlibrary/src/main/java/com/yottacode/pictogram/tabletlibrary/gui/login/StudentFragmentGrid.java

 package com.yottacode.pictogram.tabletlibrary.gui.login;
 
+import android.app.AlertDialog;
 import android.app.Fragment;
 import android.app.ProgressDialog;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.text.Editable;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
+import android.widget.EditText;
 import android.widget.GridView;
 
 import com.yottacode.net.RestapiWrapper;
@@ -83,11 +87,37 @@ public class StudentFragmentGrid extends Fragment{
             Intent pictogramActivity = new Intent(getActivity(), VOCA.class);
             startActivity(pictogramActivity);
         } else {
-            new_user(i);
-            download_supervisors(PCBcontext.getPcbdb().getCurrentUser().get_id_stu());
+            if (this.nameStudents[i].equals(getString(R.string.addStudent)))
+                register_student();
+            else {
+                new_user(i);
+                download_supervisors(PCBcontext.getPcbdb().getCurrentUser().get_id_stu());
+            }
         }
     }
+private void register_student() {
+    AlertDialog.Builder alert = new AlertDialog.Builder(this.getActivity());
+    final EditText edittext = new EditText(this.getActivity());
+    alert.setMessage(getString(R.string.getLicenseStudent));
+    alert.setTitle(getString(R.string.addStudent));
+
+    alert.setView(edittext);
+
+    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
+        public void onClick(DialogInterface dialog, int whichButton) {
+            //What ever you want to do with the value
+            String license = edittext.getText().toString();
+        }
+    });
 
+    alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
+        public void onClick(DialogInterface dialog, int whichButton) {
+            // what ever you want to do with No option.
+        }
+    });
+
+    alert.show();
+}
     private void new_user(int i) {
         JSONObject st = this.downloaded_students.get(i);
 
@@ -145,10 +175,11 @@ public class StudentFragmentGrid extends Fragment{
         }
     }
     private void show_student_list_online() {
-        final Vector<Img> imgs = new Vector<>(downloaded_students.size());
-        this.nameStudents=new String[downloaded_students.size()];
-        this.idStudents=new Vector<>(downloaded_students.size());
-        this.imageStudents=new Vector<>(downloaded_students.size());
+        int listsize=downloaded_students.size()+1;
+        final Vector<Img> imgs = new Vector<>(listsize);
+        this.nameStudents=new String[listsize];
+        this.idStudents=new Vector<>(listsize);
+        this.imageStudents=new Vector<>(listsize);
 
         for (int i = 0; i < downloaded_students.size(); i++) {
             JSONObject st;
@@ -168,6 +199,10 @@ public class StudentFragmentGrid extends Fragment{
             }
 
         } //for
+        nameStudents[listsize-1]=getString(R.string.addStudent);
+        idStudents.add(-1);
+        imgs.add(new Img(-1,null,Img.STUDENT)); //it's required to download student's images
+
         progressDialog= ProgressDialog.show(getActivity(), getString(R.string.imguserLoadingMsg),
                 getString(R.string.userLoadingTxt), false, false);
         ImgDownloader downloader = new ImgDownloader(getActivity(), new ImgDownloader.iImgDownloaderListener() {
@@ -314,19 +349,7 @@ public class StudentFragmentGrid extends Fragment{
                         e.printStackTrace();
                     }
                 }
-                switch (students.length()) {
-                    case 0:
-                        GUITools.show_alert(getActivity(), R.string.loginErrorTxt,getString(R.string.noStudentsError), new GUITools.iOKListener() {
-                            @Override
-                            public void ok() {
-                                PCBcontext.getNetService().restart_app(true);
-                            }
-                        });
-
-                        break;
-                    default:
-                        show_student_list_online();
-                }
+                show_student_list_online();
             }
             @Override
             public void result(JSONObject result) {