async void ReadData()
{
bool error = false;
try
{
Wait = new WaitActivity();
await Navigation.PushModalAsync(Wait);
await Connect();
}
catch (Exception e)
{
await DisplayAlert("Alert", e.Message, "OK");
error = true;
return;
}
finally
{
await Navigation.PopModalAsync();
}
if (error)
{
await Navigation.PopAsync();
return;
}
}
async private void Upload_Pressed(object sender, EventArgs e)
{
if (imageProcessed == null)
{
await DisplayAlert("Warning", "Please take a phone firstly.", "OK");
return;
}
byte[] buffer = DumpImageBitData(imageProcessed);
if (buffer.Length != IMAGE_HEIGHT * IMAGE_WIDTH / 8 * 2)
{
throw new Exception("internal error");
}
TotalSize = buffer.Length;
Wait = new WaitActivity();
DeviceDisplay.KeepScreenOn = true;
bool r = false;
await Navigation.PushModalAsync(Wait);
try
{
BleDevice.UpdateConnectionInterval(ConnectionInterval.High);
int MtuSize = Math.Max(Utils.BLE_MIN_MTU_SIZE, await BleDevice.RequestMtuAsync(80) - 4);
r = await Upload(buffer, MtuSize, OnProgress);
if (!r && (MtuSize > Utils.BLE_MIN_MTU_SIZE))
{
Wait.Message = "Your device's BLE subsystem seems broken, retry...";
r = await Upload(buffer, Utils.BLE_MIN_MTU_SIZE, OnProgress);
}
}
finally
{
await Navigation.PopModalAsync();
DeviceDisplay.KeepScreenOn = false;
Wait = null;
}
if (!r)
{
await DisplayAlert("Warning", "Upload failed.", "OK");
}
else
{
await NotifyWaitMsg();
}
}
