Cannot save a string to external file on Android

Question

Can't write my string to file on external storage. I have write and read external storage permissions in Manifest. Also added this one

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

from previous similar questions. But nothing seems to work. Thanks in advance

  if (isSDCARDAvailable()) {
        writeToFile(resultJson.toString());
  }else {
        Log.d(TAG, "false");
  }    


 private void writeToFile(String string){
            String filename = "routes.txt";

            File sdcard = Environment.getExternalStorageDirectory();
            File file = new File(sdcard.getPath(), filename);
            try {
                FileWriter writer = new FileWriter(file);
                writer.write(string);
                writer.flush();
                writer.close();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        public static boolean isSDCARDAvailable(){
            return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
        }

You don't need to mount or unmount external file systems. You need the permission to **access** and write to the external file system. Also, do you get any error? — UeliDeSchwert, Aug 18 '16 at 09:16
This question has been answered already - http://stackoverflow.com/questions/14376807/how-to-read-write-string-from-a-file-in-android — pVas94, Aug 18 '16 at 09:19
Yeah, I also thought so, just saw it in here: http://stackoverflow.com/a/11963713/3847464. No I don't get any error. When debugging also didn't see anything noticeable, every line is executed. But no files on sdcard whatsoever — Zhangali Bidaibekov, Aug 18 '16 at 09:20
Possible duplicate of [Can't write to external storage on Android](http://stackoverflow.com/questions/11963428/cant-write-to-external-storage-on-android) — Tom Lord, Aug 18 '16 at 09:32

score 0 · Answer 1 · answered Aug 18 '16 at 09:22

0

Please use this permission instead of mount and unmount, it will work. If it does not, please paste the error you are getting.

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

answered Aug 18 '16 at 09:22

Amit Bhandari

3,014
6
15
33

I have this permission. I don't get any errors as well – Zhangali Bidaibekov Aug 18 '16 at 09:24
Ok guys, Thanks. That was my fault. I was just looking through my sdcard with standard Windows file manager, for some reason it doesn't show this file. My devices file manager shows the file just fine – Zhangali Bidaibekov Aug 18 '16 at 09:33

score 0 · Answer 2 · answered Aug 18 '16 at 09:29

0

If every lane is executed, Log the string to see if it's empty ?

answered Aug 18 '16 at 09:29

pVas94

31
3

Cannot save a string to external file on Android

2 Answers2