Android read in a .txt file packaged with app

Question

I want to be able to read in a file, myFile.txt, that I ship with my app, either in the assets folder, the res/raw folder, where ever, it does not matter.

BUT! I do not want an InputStream of that file... I want to be able to do something like:

while ((reader = is.readLine()) != null) { ... }

I've searched around and found stuff that was close but not really what I'm looking for..

Thank you for any help.

EDIT - some code I was trying:

InputStream in = this.mCtx.getResources().openRawResource(R.raw.myFile); Reader is = new BufferedReader(new InputStreamReader(in, "UTF8"));

(now what? The Reader class doesn't have a readLine() method)

Rajesh J Advani · Accepted Answer · 2012-08-06 06:44:08Z

4

Just change

Reader is = new BufferedReader(new InputStreamReader(in, "UTF8"));

to

BufferedReader is = new BufferedReader(new InputStreamReader(in, "UTF8"));

BufferedReader has a readLine() method. You're unnecessarily upcasting to Reader and losing the additional features.

answered Aug 6, 2012 at 6:44

Rajesh J Advani

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2 Comments

JDS Over a year ago

awesome thanks! EDIT - I just noticed I'm required to throw an exception for this... Do you know under what circumstances this might fail?

Rajesh J Advani Over a year ago

Check out developer.android.com/reference/java/io/package-summary.html - you want to look at the descriptions for exceptions thrown in the constructors for both InputStreamReader and BufferedReader.

nandeesh · Accepted Answer · 2012-08-06 06:43:55Z

use BufferedReader instead of Reader for definition.

BufferedReader is = new BufferedReader(new InputStreamReader(in, "UTF8"));

Bufferedreader has readline method but not reader

Name is Nilay · Accepted Answer · 2012-08-06 06:44:26Z

You can store the file in sdcard and specify its location in "file_path" in below code:

File selectedFile = new File("file_path"); FileInputStream fstream = new FileInputStream(selectedFile); BufferedReader reader = new BufferedReader(new InputStreamReader(fstream));

And then

while ((strLine = reader.readLine()) != null) { //Do Stuff Here }

Marc-Christian Schulze · Accepted Answer · 2012-08-06 06:42:43Z

What about

BufferedReader reader = new BufferedReader(new BufferedInputStream(is));

Edit: Sorry - my fault. Just stick with the BufferedReader. Opening a ressource can be done with

InputStream is = getClass().getResourceAsStream("/org/example/res/my_file.txt");

See Class#getResourceAsStream)

How could I create the "is" object? From the InputStream? I'll update the OP with some code I was trying.

Kumar Vivek Mitra · Accepted Answer · 2012-08-06 07:00:24Z

Use these steps to get it done....

File f = new File("/sdcard/MyFolder/MyFile.txt"); FileReader fr = new FileReader(f); BufferedReader br = new BufferedReader(fr); StringBuilder sb = new StringBuilder(); String str = new String(); while((br.readLine())!=null){ sb.append(br.readLine()); } str = sb.toString();

This will discard new lines as str will have no none. This probably isn't a good idea... either process each line directly or save the new lines for later processing.

FrancescoAzzola · Accepted Answer · 2012-08-06 07:18:26Z

I think you should use something like that:

BufferedReader in = new BufferedReader(new InputStreamReader(activity.getAssets().open("yourfile")));

StringBuilder buffer = new StringBuilder(); while ((line = in.readLine()) != null) buffer.append(line).append('\n');

And in your assets dir simply put your file without .txt extension. Hope this help you.

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