我有一个“更新”函数,其中没有执行结束,然后我使用函数“Console.WriteLine”来知道函数在哪里被中断。这是 Udate 函数:
async Task Update()
{
count++;
try
{
List<string> cmds = new List<string>();
if (Ev3Messaging.IsConnected())
{
Tuple<string, string> response = null;
Console.WriteLine("Test1"); // Displayed
try
{
response = await Ev3Messaging.ReceiveText(true);
}
catch(Exception ex)
{
Console.WriteLine(ex.Source + ": " + ex.Message); // Not displayed
}
Console.WriteLine("Test2"); // Not displayed
while (response != null)
{
Console.WriteLine("Test2: " + response.Item2);
string[] list = response.Item2.Split(';');
foreach (string cmd in list)
cmds.Add(cmd);
response = await Ev3Messaging.ReceiveText(false);
}
}
Canvas canvas = _screenSV.Holder.LockCanvas();
if (canvas != null)
{
foreach (string cmd in cmds)
ExecuteCommand(cmd, canvas);
_screenSV.Holder.UnlockCanvasAndPost(canvas);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Source + ": " + ex.Message);
}
}
以下代码每 100 毫秒调用一次更新函数:
var timer = new System.Threading.Timer((e) =>
{
RunOnUiThread(async () => await Update());
}, null, 0, 100);
它显示“Test1”,但既不显示异常(“EV3Messaging.ReceiveText”函数中没有问题),也不显示“Test2”(函数在到达“ShowAlert("Test2");"之前中断)
这怎么可能 ?
如果您希望我发布“Ev3Messaging.ReceiveText”功能,请询问我。我没有发布它,因为它足够大,我只是想知道如何解决这个问题......
提前致谢。