Self-mobile attandance app

MIT App Inventor Help
1

Thankyou for explaining

in order i want to create the "self-mobile attandance app".
so... if someone want to attand...he have to go to place in a radius of office coordinate... and than send information-text. if he was on outside the radius..he can't do it.

Best Regard.

2

OK. What you want to do is create a circular ringed fence Location sensor (ringed fence / circular ringed fence). In principle, it is possible to determine if an Android is within a circle of a certain radius using the LocationSensor. In practice it probably is not possible to determine with certainty the person is within a relatively small diameter circle.

To determine if 'if someone want to attand...he have to go to place in a radius of office coordinate' is going to be a problem. Why?

  • the gps will not work very well within an office building. Accuracy will be high values (indicative of the imprecision of the location determination). The gps will not know exactly where it is. :frowning:
  • the LocationSensor can only resolve, at best 2 meters. If the person is 2 meters inside the the ring fence, the app may indicate he/she is outside of the fence and he/she won't be able to send an sms. Why? Read about the LocationSensor property Accuracy for an explanation.

You can try the example and see what happens. Is the accuracy sufficient?

A better method of determining where a person is in an office would involve scanning a barcode. He/she scans the Barcode component to read coordinates posted in a QR code on a wall in the office. Scan the barcode; if the bar code scan result indicates the person is in the office, he/she can send the Text message using sms.

Regards,
Steve

3

Thank Steve. The problem was solved.
I use Location sensor circular ringed fence..to detect someone in or out the radius.
its also more faster to get latitude and longitude.

Best Regard
Yudha.

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