added field validation

OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/LogIn.java

@@ -20,6 +20,8 @@ public class LogIn extends AppCompatActivity {
         String password = ((EditText) findViewById(R.id.PasswordInput)).getText().toString();
         DBHelper dbHelper = new DBHelper(this);
         Intent intent = new Intent(getApplicationContext(),Welcome.class);
+        if(username.matches("[a-zA-Z0-9]*")&&password.matches("[a-zA-Z0-9]*")
+                && password.length()>0 && username.length()>0) {
             if (dbHelper.findUserByUsername(username) != null) {
                 if (dbHelper.findUserByUsername(username).getUsername().equals(username) &&
                         dbHelper.findUserByUsername(username).getPassword().equals(password)) {
@@ -30,11 +32,16 @@ public class LogIn extends AppCompatActivity {
                 } else {
                     Toast.makeText(this, "Wrong Password", Toast.LENGTH_LONG).show();
                 }
-        }
+            } else {
-        else{
                 Toast.makeText(this, "Account does not exist", Toast.LENGTH_LONG).show();
             }
-
+        }
+        else if(username.length()==0 || password.length()==0){
+            Toast.makeText(this, "Fields cannot be empty", Toast.LENGTH_LONG).show();
+        }
+        else{
+            Toast.makeText(this, "Fields may only contain alphanumeric values", Toast.LENGTH_LONG).show();
+        }
 
 
     }

OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/SignUp.java

@@ -32,6 +32,8 @@ public class SignUp extends AppCompatActivity {
         String lastname = ((EditText) findViewById(R.id.LastNameInput)).getText().toString();
         MaterialSpinner spinner = findViewById(R.id.RoleInput);
         //TODO add message conditional to check if every EditText is filled up to standards
+        if(username.length()>=5 && password.length()>5 && firstname.length()>0 && lastname.length()>0 && username.matches("[a-zA-Z0-9]*") && password.matches("[a-zA-Z0-9]*")
+                && firstname.matches("[a-zA-Z0-9]*") && lastname.matches("[a-zA-Z0-9]*")){
             switch(spinner.getText().toString()){
                 case "User":
                     newUser = new User(username,password,firstname,lastname);
@@ -52,6 +54,17 @@ public class SignUp extends AppCompatActivity {
             }else{
                 Toast.makeText(this,"Username is taken",Toast.LENGTH_LONG).show();
             }
+        }
+        else if(firstname.length()==0 || lastname.length()==0 || username.length()==0 || password.length()==0){
+            Toast.makeText(this, "Fields cannot be empty", Toast.LENGTH_LONG).show();
+        }
+        else if (username.length()<=5 || password.length()<=5 ){
+            Toast.makeText(this, "Password and username must be longer than 5 characters", Toast.LENGTH_LONG).show();
+        }
+        else{
+            Toast.makeText(this, "Fields may only contain alphanumeric values", Toast.LENGTH_LONG).show();
+        }
+
 
     }
 

OlympusServices/app/src/main/res/layout/activity_welcome.xml

@@ -45,10 +45,10 @@
         android:layout_height="50dp"
         android:layout_marginBottom="20dp"
         android:gravity="center"
-        android:text="You are logged in as"
+        android:text="You are logged in as a"
         android:textAppearance="@style/TextAppearance.AppCompat.Large"
         android:textColor="@android:color/white"
-        android:textSize="30sp"
+        android:textSize="18sp"
         app:fontFamily="@font/julius_sans_one" />
 
     <TextView