My problem is the performance of reading a internal file. It's really slow. I didnt measure the time, but IMHO it is really slow. 2-3 seconds for reading a file like this:
private static String readJsonFile(String type, Context context) {
int ch;
StringBuffer sb = new StringBuffer("");
FileInputStream fis = null;
try {
fis = context.openFileInput(context.getResources().getString(R.string.class.getField("filename_" + type).getInt(null)));
while ((ch = fis.read()) != -1) {
sb.append((char)ch);
}
} catch (NotFoundException | IllegalAccessException | IllegalArgumentException | NoSuchFieldException | IOException e) {
e.printStackTrace();
}
String jsonString = new String(sb);
return jsonString;
}
The data gets written in the splash screen of the app, which uses a AsyncTask to download 5 different json input strings.
I wonder if it would be quicker to save the data in the shared preferences in order to access the data in all activities. So I would not need to make a file access operation. But isnt the SharedPrefs also a file access operation, reading an xml file?
Or should I call all functions, which need to access the globally available json data by reference function parameters? Dos this work?
To cut a long story short: I need a pattern/schema on how to store the 5 different JSON data Strings during the lifecycle of my app, so that each and every activity can access them, without doing a file operation, or a database request?
Is there somekind of app-cache to do this?
EDIT: Another idea in my mind would be to use HttpResponseCache and start the asyncActivity downloading the data (in this case from cache). But still isnt this also a file reading operation?
Thanks
