title: Android: Do I open a file resource everytime I want to log
body: <p>I am doing my own logger in android by writing to a file. Currently, I call function that opens a file and appends a string to it. However, i read somewhere that it is exccessive ( operation heavy) to open a file everytime  I log to it. Is this true? What's the alternative here? Should I open a file a leave it open for the duration of the app and just append to it? Or what do you suggest?</p>
  
  <p>Thank you very much</p>