EROS | Read Only file system error

Question

In my android app, i am logging errors in a txt file. But when i try to create file , i face an error Java.io.IOException: open failed: EROS( Read Only file system error). I have added write permissions in AndroidManifest.xml but no difference. How to fix it ?

code

    try {       
          File file =new File("Log.txt");
            if(!file.exists()){
                file.createNewFile();
        } 
        catch (Exception e) 
        {
            Log.w("tun tun", e.toString());
        }

working on emulator or device ? – duggu May 01 '14 at 10:57 — duggu, May 01 '14 at 10:57
device S3 @HemantChandDungriyal – Baqer Naqvi May 01 '14 at 10:58 — Baqer Naqvi, May 01 '14 at 10:58
context.getFilesDir().getPath().toString() + "/log.txt"; – duggu May 01 '14 at 11:01 — duggu, May 01 '14 at 11:01

Biraj Zalavadia · Accepted Answer · 2014-05-01T11:15:30.110

1

Do this way

To store on external storage(SDCARD)

try {
            File file = new File(Environment.getExternalStorageDirectory() + File.separator + "Log.txt");
            if (!file.exists()) {
                file.createNewFile();
            }
        } catch (Exception e) {
            Log.w("tun tun", e.toString());
        }

To store In internal storage

try {
        File file = new File(context.getCacheDir() + File.separator + "Log.txt");

    if (!file.exists()) {
        file.createNewFile();
    }
} catch (Exception e) {
    Log.w("tun tun", e.toString());
}

edited May 01 '14 at 11:15

answered May 01 '14 at 11:02

Biraj Zalavadia

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to save in internal storage it shows error on getCacheDir() @Biraj Zalavadia – Baqer Naqvi May 01 '14 at 11:13
are you writing this code in activity? or out side the activity? – Biraj Zalavadia May 01 '14 at 11:15
if you are trying from out side the activity need to write context.getCacheDir() – Biraj Zalavadia May 01 '14 at 11:16
what if i want to get it in simple java class ? @Biraj Zalavadia – Baqer Naqvi May 01 '14 at 11:24
any how you need to pass context from your activity to simple java class – Biraj Zalavadia May 01 '14 at 11:26

score 1 · Answer 2 · edited May 23 '17 at 12:11

try some below codes:-

Problem is you are not adding path.

String filePath = context.getFilesDir().getPath().toString() + "/fileName.txt";
File f = new File(filePath);

or

String FILENAME = "hello_file";
String string = "hello world!";

FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos.write(string.getBytes());
fos.close();

refrence

or

path = Environment.getExternalStorageDirectory();
File file = new File(path, "/" + fname);

Data directory has no read/write permission in Android

EROS | Read Only file system error

2 Answers2