CODEWITHSUNDEEP
androidxamarinprogressdialog
A. Schmidt
A. Schmidt

Reputation: 35

Xamarin ProgressDialog

I am building Xamarin android app and I have a function that needs some time. Now, I am trying to display a ProgressDialog and execute the function. The code below do not show the ProgressDialog, I just see nothing. Can you please help me ?

private void BtButton_Click(object sender, System.EventArgs e)
{

    ProgressDialog mDialog = new ProgressDialog(this);
    mDialog.SetMessage("Loading data...");
    mDialog.SetCancelable(false);
    mDialog.Show();

    Task t = Task.Run(() => { Foo(); });
    t.Wait();
    mDialog.Dismiss();
}

private void Foo()
{
    for (int i = 0; i < 10; i++)
    {
        Thread.Sleep(1000);
    }
}

Upvotes: 1

Views: 1080

Answers (1)

EvZ
EvZ

Reputation: 12179

You are blocking the main thread by invoking t.Wait(), more information can be found here.

Instead you can do something like this:

async void BtButton_Click(object sender, System.EventArgs e)
{
    var mDialog = new ProgressDialog(this);
    mDialog.SetMessage("Loading data...");
    mDialog.SetCancelable(false);
    mDialog.Show();

    await Task.Run((() => Foo()));
    // Alternatively
    // await Task.Delay(10000);

    mDialog.Dismiss();
}

void Foo()
{
    for (int i = 0; i < 10; i++)
    {
        Thread.Sleep(1000);
    }
}

P.S.: ProgressDialog is deprecated in API level 26 use alternatives.

Upvotes: 1

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