Android FileOutputStream location save file

Question

I have an app that saves into a file (internal storage) data input by the user and at startup it loads this file and shows the contents. I would like to know: where can I find my file (data.txt)? In addition, if I input "Hello" and then "World" when I load the file, I see "HelloWorld" in the same line but I want "Hello" and "World" printed on two different lines.

For saving file:

public void writeToFile(String data) {
    try {
        FileOutputStream fou = openFileOutput("data.txt", MODE_APPEND);
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fou);
        outputStreamWriter.write(data);
        outputStreamWriter.close();
    }
    catch (IOException e) {
        Log.e("Exception", "File write failed: " + e.toString());
    }
}

For loading file:

public String readFromFile() {

    String ret = "";

    try {
        InputStream inputStream = openFileInput("data.txt");

        if ( inputStream != null ) {
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String receiveString = "";
            StringBuilder stringBuilder = new StringBuilder();

            while ( (receiveString = bufferedReader.readLine()) != null ) {
                stringBuilder.append(receiveString);
            }

            inputStream.close();
            ret = stringBuilder.toString();
        }

    }
    catch (FileNotFoundException e) {
        Log.e("login activity", "File not found: " + e.toString());
    } catch (IOException e) {
        Log.e("login activity", "Can not read file: " + e.toString());
    }

    return ret;
}

Thanks.

[UPDATE]

I've inserted "\n" after every input:

user = (EditText) v.findViewById(R.id.username);
writeToFile(user.getText().toString() + "\n");

But when I print my file, they are always on the same line.

how can i set new path for saving file? – xXJohnRamboXx Jan 07 '15 at 12:12 — xXJohnRamboXx, Jan 07 '15 at 12:12

score 14 · Accepted Answer · edited Aug 31 '18 at 05:06

14

Where can I find my file (data.txt)?

You can find the path of the directory, which is created by openFileOutput, by using YourActivity.this.getFilesDir().getAbsolutePath().

But I want "Hello" and "World" printed in two different lines.

Use line.separator after writing a word in a file, for example:

String separator = System.getProperty("line.separator");
outputStreamWriter.write(data);
outputStreamWriter.append(separator);
...

Or you can also use replaceAll to break String into multiple lines:

String separator = System.getProperty("line.separator");
data=data.replaceAll(" ",separator);

edited Aug 31 '18 at 05:06

0xCursor

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answered Jan 07 '15 at 12:17

ρяσѕρєя K

132,198
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my path is /data/data/mypackage but if i go there is empty..maybe it's necessary my device is rooted to see it.. String separator = System.getProperty("line.separator"); doesn't work..words are still in same line – xXJohnRamboXx Jan 07 '15 at 12:24
@xXJohnRamboXx: are you sure when you are reading data from file then adding new line ? – ρяσѕρєя K Jan 07 '15 at 12:28
1

@xXJohnRamboXx: try it as :: `stringBuilder.append(receiveString);stringBuilder.append("\n");` – ρяσѕρєя K Jan 07 '15 at 12:31
i print my contet file into a textview component and the words aren't in separate lines – xXJohnRamboXx Jan 07 '15 at 12:31
@xXJohnRamboXx: to view file try it using DDMS – ρяσѕρєя K Jan 07 '15 at 12:32
ok adding stringBuilder.append("\n"); now works perfectly! Last question: how can i save my file into my dowload folder? – xXJohnRamboXx Jan 07 '15 at 12:35
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/68339/discussion-between--k-and-xxjohnramboxx). – ρяσѕρєя K Jan 07 '15 at 12:36

M. Erfan Mowlaei · Answer 2 · 2016-08-19T16:30:58.703

4

I guess you can find it here: data/data/[your package name]/... and regarding writing in two separate lines just add "\n" whenever you need to go to another line.

edited Aug 19 '16 at 16:30

answered Jan 07 '15 at 12:08

M. Erfan Mowlaei

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my data/data is empty..i've just added "\n" after each words but nothing :/ – xXJohnRamboXx Jan 07 '15 at 12:11
If you want to write data in your sdcard then once carefully read this tutorial : http://chrisrisner.com/31-Days-of-Android--Day-23%E2%80%93Writing-and-Reading-Files – M. Erfan Mowlaei Jan 07 '15 at 12:15

Android FileOutputStream location save file

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