Question

1. I want to store the current data/time and the Button Id into some file.
2. Currently, I am doing this with Internal Storage, but this is not working for me.
3. I am able to store the String (as most of us can find in various tutorials) but I am not able to store the Date/time and button id. For String, we can easily use fos.write(string.getbyte[]).
4. Another thing that I want to do is after storing the data into the file, I want to access that file so that I can manipulate data from it.

Eg. There are few buttons, TV_ON, TV_OFF, DVD_ON, etc. If I will click TV_ON button, it will store the Button Id and at what time that button is pressed. And if TV_OFF is pressed, it will store the corresponding Id and Time. So that I can get the duration for which TV was ON. This way I will able to interpret Energy Consumed during that duration (Using some calculations).

Please Guide !!

Answer 1

You need to convert a Date to String using a formatter because same date could be represented in many different ways. Printing button id is straightforward:

Date date = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String logMsg = "Date: " + formatter.format(date) + " Button id: " + R.id.your_button_id;
Log.i(tag, logMsg);
fos.write(logMsg);