protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
btnChange = FindViewById <Button>(Resource.Id.btnChange);
TextView usd = FindViewById <TextView>(Resource.Id.usd);
TextView eur = FindViewById <TextView>(Resource.Id.eur);
TextView aud = FindViewById <TextView>(Resource.Id.aud);
TextView jpy = FindViewById <TextView>(Resource.Id.jpy);
TextView rate = FindViewById <TextView>(Resource.Id.rate);
btnChange.Click += async(sender, e) => {
api a = new api();
JsonValue val = await a.RefreshDataAsync();
EditText money = FindViewById <EditText>(Resource.Id.numFrom);
double num = double.Parse(money.Text);
double vnd = double.Parse(val["quotes"]["USDVND"].ToString());
double eurex = double.Parse(val["quotes"]["USDEUR"].ToString());
double audex = double.Parse(val["quotes"]["USDAUD"].ToString());
double jpyex = double.Parse(val["quotes"]["USDJPY"].ToString());
usd.Text = (num / vnd).ToString("0.00") + " USD";
eur.Text = (num * eurex / vnd).ToString("0.00") + " EUR";
aud.Text = (num * audex / vnd).ToString("0.00") + " AUD";
jpy.Text = (num * jpyex / vnd).ToString("0.00") + " JPY";
string original = val["quotes"].ToString();
original = " " + original.Substring(1);
original = original.Substring(0, original.Length - 1);
for (int i = 0; i < original.Length; i++)
{
if (original[i] == ',')
{
original = original.Substring(0, i - 1) + "\n" + original.Substring(i + 1);
}
}
rate.Text = "Some exchange rate from USD to other:\n" + original;
};
}