public override bool OnContextItemSelected(IMenuItem item)
{
var info = (AdapterView.AdapterContextMenuInfo)item.MenuInfo;
var index = item.ItemId;
var menuItem = Resources.GetStringArray(Resource.Array.menu);
var menuItemName = menuItem[index];
GpaRecord taskName = myRecord[info.Position];
id = info.Position;
if (menuItemName == "Delete")
{
//delete the contact from the DB and update the displayed contacts
var builder = new AlertDialog.Builder(this);
builder.SetMessage("This will delete Activity: " + taskName.Semester + " from the record. OK?");
builder.SetPositiveButton("OK", (s, e) => {
//they clicked OK
//delete the contact from the db
var db = new SQLiteConnection(dbPath);
db.Delete(taskName);
//delete the contact from the list
myRecord.Remove(taskName);
//Since we are in the main activity
this.Recreate();
});
builder.SetNegativeButton("Cancel", (s, e) =>
{
//they clicked cancel
return;
});
builder.Create().Show();
}
return(true);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
//set the view from the current GPA layout
SetContentView(Resource.Layout.CurrentGPA);
calcBtn = FindViewById <Button>(Resource.Id.calculate_btn);
clearBtn = FindViewById <Button>(Resource.Id.clear_btn);
addBtn = FindViewById <Button>(Resource.Id.record_btn);
semester = FindViewById <EditText>(Resource.Id.semester);
displayGPA = FindViewById <TextView>(Resource.Id.gpaDisplay_textView);
spinner1 = FindViewById <Spinner>(Resource.Id.spinner1);
spinner2 = FindViewById <Spinner>(Resource.Id.spinner2);
spinner3 = FindViewById <Spinner>(Resource.Id.spinner3);
spinner4 = FindViewById <Spinner>(Resource.Id.spinner4);
spinner5 = FindViewById <Spinner>(Resource.Id.spinner5);
spinner6 = FindViewById <Spinner>(Resource.Id.spinner6);
spinner7 = FindViewById <Spinner>(Resource.Id.spinner7);
course1 = FindViewById <EditText>(Resource.Id.course1_textView);
course2 = FindViewById <EditText>(Resource.Id.course2_textView);
course3 = FindViewById <EditText>(Resource.Id.course3_textView);
course4 = FindViewById <EditText>(Resource.Id.course4_textView);
course5 = FindViewById <EditText>(Resource.Id.course5_textView);
course6 = FindViewById <EditText>(Resource.Id.course6_textView);
course7 = FindViewById <EditText>(Resource.Id.course7_textView);
credit1 = FindViewById <EditText>(Resource.Id.credit1_textView);
credit2 = FindViewById <EditText>(Resource.Id.credit2_textView);
credit3 = FindViewById <EditText>(Resource.Id.credit3_textView);
credit4 = FindViewById <EditText>(Resource.Id.credit4_textView);
credit5 = FindViewById <EditText>(Resource.Id.credit5_textView);
credit6 = FindViewById <EditText>(Resource.Id.credit6_textView);
credit7 = FindViewById <EditText>(Resource.Id.credit7_textView);
displayGPA = FindViewById <TextView>(Resource.Id.gpaDisplay_textView);
//check for spinner value not selected or equal to null
if (spinner1 != null)
{
spinner1.ItemSelected += new EventHandler <AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected);
}
else
{
//set the grade letter to empty
GradesLetter[0] = "";
}
//check for spinner value not selected or equal to null
if (spinner2 != null)
{
spinner2.ItemSelected += new EventHandler <AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected1);
}
else
{
//set the grade letter to empty
GradesLetter[1] = "";
}
//check for spinner value not selected or equal to null
if (spinner3 != null)
{
spinner3.ItemSelected += new EventHandler <AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected2);
}
else
{
//set the grade letter to empty
GradesLetter[2] = "";
}
//check for spinner value not selected or equal to null
if (spinner4 != null)
{
spinner4.ItemSelected += new EventHandler <AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected3);
}
else
{
//set the grade letter to empty
GradesLetter[3] = "";
}
//check for spinner value not selected or equal to null
if (spinner5 != null)
{
spinner5.ItemSelected += new EventHandler <AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected4);
}
else
{
//set the grade letter to empty
GradesLetter[4] = "";
}
//check for spinner value not selected or equal to null
if (spinner6 != null)
{
spinner6.ItemSelected += new EventHandler <AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected5);
}
else
{
//set the grade letter to empty
GradesLetter[5] = "";
}
//check for spinner value not selected or equal to null
if (spinner7 != null)
{
spinner7.ItemSelected += new EventHandler <AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected6);
}
else
{
//set the grade letter to empty
GradesLetter[6] = "";
}
//create adpater for the spinner
var adapter = ArrayAdapter.CreateFromResource(this,
Resource.Array.grade_letters, Android.Resource.Layout.SimpleSpinnerDropDownItem);
//specify the layout when the list of choices appears
adapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
//calculate GPA : calc button
calcBtn.Click += delegate
{
//get credit values and check for null Edittext
if (!string.IsNullOrEmpty(credit1.Text))
{
//convert user input to double and add it to the credit array
double cred1 = Convert.ToDouble(credit1.Text);
CreditsArray[0] = cred1;
}
else
{
//set the credit value to 0 in the array
CreditsArray[0] = 0.00;
}
if (!string.IsNullOrEmpty(credit2.Text))
{
//convert user input to double and add it to the credit array
double cred2 = Convert.ToDouble(credit2.Text);
CreditsArray[1] = cred2;
}
else
{
//set the credit value to 0 in the array
CreditsArray[1] = 0.00;
}
if (!string.IsNullOrEmpty(credit3.Text))
{
//convert user input to double and add it to the credit array
double cred3 = Convert.ToDouble(credit3.Text);
CreditsArray[2] = cred3;
}
else
{
//set the credit value to 0 in the array
CreditsArray[2] = 0.00;
}
if (!string.IsNullOrEmpty(credit4.Text))
{
//convert user input to double and add it to the credit array
double cred4 = Convert.ToDouble(credit4.Text);
CreditsArray[3] = cred4;
}
else
{
//set the credit value to 0 in the array
CreditsArray[3] = 0.00;
}
if (!string.IsNullOrEmpty(credit5.Text))
{
//convert user input to double and add it to the credit array
double cred5 = Convert.ToDouble(credit5.Text);
CreditsArray[4] = cred5;
}
else
{
//set the credit value to 0 in the array
CreditsArray[4] = 0.00;
}
if (!string.IsNullOrEmpty(credit6.Text))
{
//convert user input to double and add it to the credit array
double cred6 = Convert.ToDouble(credit6.Text);
CreditsArray[5] = cred6;
}
else
{
//set the credit value to 0 in the array
CreditsArray[5] = 0.00;
}
if (!string.IsNullOrEmpty(credit7.Text))
{
//convert user input to double and add it to the credit array
double cred7 = Convert.ToDouble(credit7.Text);
CreditsArray[6] = cred7;
}
else
{
//set the credit value to 0 in the array
CreditsArray[6] = 0.00;
}
//calculation
for (int i = 0; i < GradesLetter.Length; i++)
{
//get the grade letter from the grade letter array
string grade = GradesLetter[i];
//call the the get letter grade value with the grade letter
double point = calculateGPA(grade);
double credit = CreditsArray[i];
//calculate total credit hours
TotalCreditHours += credit;
//calculate grade point for each class
gradePoint = credit * point;
//calculate total grade point
TotalGradePoints += gradePoint;
}
//calculate GPA
WeightedGPA = Math.Round(TotalGradePoints / TotalCreditHours, 3);
//display GPA
displayGPA.Text = Convert.ToString(WeightedGPA);
};
//clear all entries : cler button
clearBtn.Click += delegate
{
//call the function to clear everything
Clearentries();
};
//store GPA to record : add gpa button
addBtn.Click += delegate
{
string semesterStr = Convert.ToString(semester.Text);
string gpaStr = Convert.ToString(displayGPA.Text);
if (semesterStr == "" || gpaStr == "")
{
Toast.MakeText(this, string.Format("You must indicate what semester"), ToastLength.Short).Show();
}
else
{
//string that holds the path information for our database
string dbPath = Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "dbGPAs.db3");
//setup the db connection
var db = new SQLiteConnection(dbPath);
//create a contac object
GpaRecord record = new GpaRecord(semesterStr, gpaStr, TotalGradePoints, TotalCreditHours);
//store the objects in the table
db.Insert(record);
Toast.MakeText(this, string.Format("GPA was added to record"), ToastLength.Short).Show();
//clear everything
Clearentries();
}
};
}
