void AutoFocus(int x, int y, bool useCoordinates)
{
if (camera != null)
{
var cameraParams = camera.GetParameters();
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "AutoFocus Requested");
// Cancel any previous requests
camera.CancelAutoFocus();
try {
// If we want to use coordinates
// Also only if our camera supports Auto focus mode
// Since FocusAreas only really work with FocusModeAuto set
if (useCoordinates &&
cameraParams.SupportedFocusModes.Contains(Camera.Parameters.FocusModeAuto))
{
// Let's give the touched area a 20 x 20 minimum size rect to focus on
// So we'll offset -10 from the center of the touch and then
// make a rect of 20 to give an area to focus on based on the center of the touch
x = x - 10;
y = y - 10;
// Ensure we don't go over the -1000 to 1000 limit of focus area
if (x >= 1000)
{
x = 980;
}
if (x < -1000)
{
x = -1000;
}
if (y >= 1000)
{
y = 980;
}
if (y < -1000)
{
y = -1000;
}
// Explicitly set FocusModeAuto since Focus areas only work with this setting
cameraParams.FocusMode = Camera.Parameters.FocusModeAuto;
// Add our focus area
cameraParams.FocusAreas = new List <Camera.Area> {
new Camera.Area(new Rect(x, y, x + 20, y + 20), 1000)
};
camera.SetParameters(cameraParams);
}
// Finally autofocus (weather we used focus areas or not)
camera.AutoFocus(this);
} catch (Exception ex) {
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "AutoFocus Failed: {0}", ex);
}
}
}
public void AutoFocus()
{
if (camera != null)
{
if (!tokenSource.IsCancellationRequested)
{
Android.Util.Log.Debug("ZXING", "AutoFocus Requested");
camera.AutoFocus(this);
}
}
}
public void AutoFocus(int x, int y)
{
if (camera != null)
{
if (!tokenSource.IsCancellationRequested)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "AutoFocus Requested");
try {
camera.AutoFocus(this);
} catch (Exception ex) {
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "AutoFocus Failed: {0}", ex);
}
}
}
}
// Start autofocus (used when continuous autofocus is disabled)
public void autoFocus(Android.Hardware.Camera.IAutoFocusCallback callback)
{
if (camera != null)
{
try
{
setCameraFocusMode(Android.Hardware.Camera.Parameters.FocusModeAuto);
camera.AutoFocus(callback);
}
catch (Exception e)
{
Log.Error(GetString(Resource.String.app_name), "Error: " + e.Message);
}
}
}
public AutoFocusCallback(AndroidCamera camera)
{
timer = new Timer()
{
Interval = 400,
Enabled = false,
AutoReset = true
};
timer.Elapsed += (s, e) => {
if (timer.Enabled)
{
this.Debug("Autofocusing");
camera.AutoFocus(this);
}
};
}
private void TapOnCamera(object sender, EventArgs e)
{
_camera.AutoFocus(this);
}
private void TakePhotoButtonTapped(object sender, EventArgs e)
{
takePicture = true;
UserDialogs.Instance.ShowLoading(title: "Please hold still...");
camera.AutoFocus(this);
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Hide the window title and go fullscreen.
RequestWindowFeature(WindowFeatures.NoTitle);
Window.AddFlags(WindowManagerFlags.Fullscreen);
// Create our Preview view and set it as the content of our activity.
mPreview = new CameraView(this);
FrameLayout.LayoutParams tparams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent,
ViewGroup.LayoutParams.WrapContent); //定义显示组件参数
View mainView = View.Inflate(this, Resource.Layout.Main, null);
Button btn = mainView.FindViewById <Button> (Resource.Id.takepicb);
Button enrollbtn = mainView.FindViewById <Button> (Resource.Id.enrollbtn);
Button kechenbtn = mainView.FindViewById <Button> (Resource.Id.button1);
Spinner spinner = mainView.FindViewById <Spinner> (Resource.Id.spinner1);
tv = mainView.FindViewById <TextView> (Resource.Id.statustext);
tv.Text = "开始指纹识别。。。";
result = mainView.FindViewById <TextView> (Resource.Id.resulttext);
Switch autoSw = mainView.FindViewById <Switch> (Resource.Id.switch1);
iv = mainView.FindViewById <ImageView> (Resource.Id.imageView1);
frameView = mainView.FindViewById <TextView> (Resource.Id.textView1);
tts = new TextToSpeech(this, this);
FrameLayout fl = new FrameLayout(this);
fl.AddView(mPreview);
fl.AddView(mainView);
//保持屏幕常亮
Window.SetFlags(WindowManagerFlags.KeepScreenOn, WindowManagerFlags.KeepScreenOn);
SetContentView(fl, tparams);
// Initialize SourceAFIS
Afis = new AfisEngine();
// Look up the probe using Threshold = 10
Afis.Threshold = 25;
// Enroll some people
database = new List <MyPerson>();
lessons = new List <MyLesson> ();
if (System.IO.File.Exists(ImagePath + "lessons"))
{
BinaryFormatter formatter = new BinaryFormatter();
using (FileStream stream = File.OpenRead(ImagePath + "lessons"))
lessons = (List <MyLesson>)formatter.Deserialize(stream);
}
else
{
tv.Text = "无课程，请添加课程。。。";
}
List <string> lessonname = new List <string> ();
foreach (MyLesson ml in lessons)
{
lessonname.Add(ml.name);
}
ArrayAdapter <string> adapter = new ArrayAdapter <string> (Application.Context, Android.Resource.Layout.SimpleSpinnerItem, lessonname);
spinner.Adapter = adapter;
spinner.ItemSelected += delegate(object sender, AdapterView.ItemSelectedEventArgs e) {
Spinner s = (Spinner)sender;
nowLesson = s.GetItemAtPosition(e.Position).ToString();
//判断数据库是否存在
if (System.IO.File.Exists(ImagePath + nowLesson + ".dat"))
{
tv.Text = "已载入" + nowLesson + "数据库,开始识别。。。";
BinaryFormatter formatterr = new BinaryFormatter();
Console.WriteLine("Reloading database...");
using (FileStream stream = File.OpenRead(ImagePath + nowLesson + ".dat"))
database = (List <MyPerson>)formatterr.Deserialize(stream);
}
else
{
tv.Text = "数据库" + nowLesson + "中无数据，请录入指纹。。。";
database = new List <MyPerson>();
}
//判断本课程今天的考勤是否已经建立
todayisbuld = false;
for (int i = 0; i < lessons.Count; i++)
{
if (lessons[i].name.Equals(nowLesson))
{
//获取当前课程的数据库中的标号
nowLessonNum = i;
for (int j = 0; j < lessons[i].attendance.Count; j++)
{
DateTime nowTime = DateTime.Now;
if ((lessons[i].attendance[j].date.Year == nowTime.Year) &&
(lessons[i].attendance[j].date.Month == nowTime.Month) &&
(lessons[i].attendance[j].date.Day == nowTime.Day)
)
{
todayisbuld = true;
//如果本课程今天已经建立了考勤，则获取当前考勤的数据库标号
todayNum = j;
//校准考勤时间的日期到今天的课程设置时间，方便比较
//lessons[nowLessonNum].time = new DateTime(nowTime.Year,nowTime.Month,nowTime.Day,
// lessons[nowLessonNum].time.Hour,lessons[nowLessonNum].time.Minute,0);
}
}
}
}
//如果没建立，就新建一个
if (!todayisbuld)
{
DateTime nowTime = DateTime.Now;
//校准考勤时间的日期到今天的课程设置时间，方便比较
//lessons[nowLessonNum].time = new DateTime(nowTime.Year,nowTime.Month,nowTime.Day,
// lessons[nowLessonNum].time.Hour,lessons[nowLessonNum].time.Minute,0);
//新建今天的考勤
Attendance att = new Attendance(new DateTime(nowTime.Year, nowTime.Month, nowTime.Day,
lessons[nowLessonNum].time.Hour, lessons[nowLessonNum].time.Minute, 0));
lessons[nowLessonNum].attendance.Add(att);
todayNum = lessons[nowLessonNum].attendance.IndexOf(att);
todayisbuld = true;
}
};
btn.Click += delegate {
try{
auto = false;
mCamera.TakePicture(null, null, this);
//设置、输出相机参数
Android.Hardware.Camera.Parameters p = mCamera.GetParameters();
string s = p.Flatten();
Console.WriteLine(s);
// p.Set("iso",100.ToString());
// p.Set("jpeg-quality",100.ToString());
// mCamera.SetParameters(p);
//输出支持的图片分辨率
// IList<Android.Hardware.Camera.Size> ss = p.SupportedPictureSizes;
// foreach(Android.Hardware.Camera.Size aa in ss)
// {
// Console.WriteLine(aa.Height +"," + aa.Width);
// }
}
catch (Exception e)
{
e.ToString();
}
};
btn.SetOnTouchListener(this);
enrollbtn.SetOnTouchListener(this);
kechenbtn.SetOnTouchListener(this);
btn.LongClick += delegate {
mCamera.AutoFocus(null);
tv.Text = lessons[nowLessonNum].attendance[todayNum].attend.Count + "";
result.Text = lessons[nowLessonNum].attendance[todayNum].late.Count + "";
//hdler.PostDelayed (this,DELAY_MILLIS);
};
enrollbtn.Click += delegate {
EditText editT = new EditText(this);
AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
alertDialog.SetTitle("请输入学号后3位：");
alertDialog.SetView(editT);
alertDialog.SetPositiveButton("确认", delegate {
xuehao = editT.Text;
tv.Text = "学号为" + xuehao + "，开始录入指纹。。。";
isIdentify = false;
});
alertDialog.SetNegativeButton("取消", delegate {
});
alertDialog.Show();
};
kechenbtn.Click += delegate {
View base2 = View.Inflate(this, Resource.Layout.kecheng, null);
Button deletelesson = base2.FindViewById <Button>(Resource.Id.button3);
Button backbtn = base2.FindViewById <Button>(Resource.Id.button1);
Button addbtn = base2.FindViewById <Button>(Resource.Id.button2);
ListView listLesson = base2.FindViewById <ListView>(Resource.Id.listView1);
//SimpleAdapter sAdapter = new SimpleAdapter(Application.Context,
deletelesson.Click += delegate {
};
addbtn.Click += delegate {
EditText editT = new EditText(this);
EditText edittime = new EditText(this);
LinearLayout ll = new LinearLayout(this);
ll.Orientation = Orientation.Vertical;
ll.AddView(editT);
ll.AddView(edittime);
AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
alertDialog.SetTitle("请输入课程名和时间：");
alertDialog.SetView(ll);
alertDialog.SetPositiveButton("确认", delegate {
//lessons.Add(editT.Text);
MyLesson myl = new MyLesson(editT.Text, Convert.ToDateTime(edittime.Text.Insert(2, ":")));
lessons.Add(myl);
adapter.Add(editT.Text);
adapter.NotifyDataSetChanged();
Console.WriteLine("添加课程...");
BinaryFormatter formatters = new BinaryFormatter();
using (Stream stream = File.Open(ImagePath + "lessons", FileMode.OpenOrCreate))
formatters.Serialize(stream, lessons);
tv.Text = "课程名为" + editT.Text + "，请录入指纹。。。";
});
alertDialog.SetNegativeButton("取消", delegate {
});
alertDialog.Show();
};
//返回
backbtn.Click += delegate {
SetContentView(fl);
};
//如果开了自动，则关闭
if (autoSw.Checked)
{
hdler.RemoveCallbacks(this);
autoSw.Checked = false;
}
SetContentView(base2);
};
autoSw.CheckedChange += delegate {
if (autoSw.Checked)
{
hdler.PostDelayed(this, DELAY_MILLIS);
}
else
{
hdler.RemoveCallbacks(this);
}
};
//zoom放大
// sk.ProgressChanged += delegate {
// Android.Hardware.Camera.Parameters p = mCamera.GetParameters();
// int maxPa = p.MaxZoom;
// int maxCa = sk.Max;
// p.Zoom = maxPa * sk.Progress / maxCa;
// mCamera.SetParameters(p);
// };
}