Read file with Android, what is the expected path?

Question

I am not having luck with this method, which is basically a hello world for printing file contents to the Android cat log.

 try { InputStream instream = openFileInput("inputFile.txt"); InputStreamReader inputreader = new InputStreamReader(instream); BufferedReader buffreader = new BufferedReader(inputreader); String line; while (( line = buffreader.readLine()) != null) { System.out.println(line); } instream.close(); } catch (java.io.FileNotFoundException e) { e.printStackTrace(); }

Using a default generated project with the Android Eclipse plugin, under what directory should this file exist? Any other considerations?

Knickedi · Accepted Answer · 2011-10-10 00:51:44Z

This will try to read the file inputFile.txt from your internal application data directory /data/data/your.application.package/ (and will fail if it doesn't exist):

openFileInput("inputFile.txt");

To read a file from SD card you would do something like this:

new FileInputStream(Environement.getExternalStorageDirectory() .getAbsolutePath() + "/inputFile.txt")

Don't forget to set the SD card permission in your manifest then:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Thanks for the follow up, I did a bit of reading and it looks like I want to use /res/raw, as this static data file would be distributed with the app rather than created by it (thus no /data/ directory)

spatulamania · Accepted Answer · 2011-10-10 00:47:56Z

This file should exist in the apps local 'data' directory. Does this file already exist? Have you taken a look at the documentation for file IO on Android?

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