public override void PromptForInputAsync(string prompt, bool startVoiceRecognizer, Action <string> callback)
{
new Thread(() =>
{
string input = null;
ManualResetEvent dialogDismissWait = new ManualResetEvent(false);
GetMainActivityAsync(true, mainActivity => mainActivity.RunOnUiThread(() =>
{
EditText inputEdit = new EditText(mainActivity);
AlertDialog dialog = new AlertDialog.Builder(mainActivity)
.SetTitle("Sensus is requesting input...")
.SetMessage(prompt)
.SetView(inputEdit)
.SetPositiveButton("OK", (o, e) =>
{
input = inputEdit.Text;
})
.SetNegativeButton("Cancel", (o, e) => { })
.Create();
// SetOnDismissListener was added to the AlertDialog.Builder class at API level 17. Call it here to keep us at API level 16.
dialog.SetOnDismissListener(new AndroidOnDismissListener(() =>
{
dialogDismissWait.Set();
}));
ManualResetEvent dialogShowWait = new ManualResetEvent(false);
dialog.SetOnShowListener(new AndroidOnShowListener(() =>
{
dialogShowWait.Set();
}));
// dismiss the keyguard when dialog appears
dialog.Window.AddFlags(global::Android.Views.WindowManagerFlags.DismissKeyguard);
dialog.Window.AddFlags(global::Android.Views.WindowManagerFlags.ShowWhenLocked);
dialog.Window.AddFlags(global::Android.Views.WindowManagerFlags.TurnScreenOn);
dialog.Window.SetSoftInputMode(global::Android.Views.SoftInput.StateAlwaysVisible);
// dim whatever is behind the dialog
dialog.Window.AddFlags(global::Android.Views.WindowManagerFlags.DimBehind);
dialog.Window.Attributes.DimAmount = 0.75f;
dialog.Show();
#region voice recognizer
if (startVoiceRecognizer)
{
new Thread(() =>
{
// wait for the dialog to be shown so it doesn't hide our speech recognizer activity
dialogShowWait.WaitOne();
// there's a slight race condition between the dialog showing and speech recognition showing. pause here to prevent the dialog from hiding the speech recognizer.
Thread.Sleep(1000);
Intent intent = new Intent(RecognizerIntent.ActionRecognizeSpeech);
intent.PutExtra(RecognizerIntent.ExtraLanguageModel, RecognizerIntent.LanguageModelFreeForm);
intent.PutExtra(RecognizerIntent.ExtraSpeechInputCompleteSilenceLengthMillis, 1500);
intent.PutExtra(RecognizerIntent.ExtraSpeechInputPossiblyCompleteSilenceLengthMillis, 1500);
intent.PutExtra(RecognizerIntent.ExtraSpeechInputMinimumLengthMillis, 15000);
intent.PutExtra(RecognizerIntent.ExtraMaxResults, 1);
intent.PutExtra(RecognizerIntent.ExtraLanguage, Java.Util.Locale.Default);
intent.PutExtra(RecognizerIntent.ExtraPrompt, prompt);
mainActivity.GetActivityResultAsync(intent, AndroidActivityResultRequestCode.RecognizeSpeech, result =>
{
if (result != null && result.Item1 == Result.Ok)
{
IList <string> matches = result.Item2.GetStringArrayListExtra(RecognizerIntent.ExtraResults);
if (matches != null && matches.Count > 0)
{
mainActivity.RunOnUiThread(() =>
{
inputEdit.Text = matches[0];
});
}
}
});
}).Start();
}
#endregion
}));
dialogDismissWait.WaitOne();
callback(input);
}).Start();
}
