CODEWITHSUNDEEP
javaandroid
Ilan Tal
Ilan Tal

Reputation: 499

How to use Android Internal Storage

I am writing an application where I would like to allow the created csv file to be used on a PC. Android has Internal Storage which is viewable on the Android and can be accessed via USB on the PC. I tried various methods to generate a file name:

/data/user/0/com.ed.ilan.ioioterbium/files/documents/2016_9_16_10_28_12.csv
/data/user/0/com.ed.ilan.ioioterbium/files/2016_9_16_10_35_57.csv
2016_9_16_10_46_34.csv

The name of the application I got using getFilesDir(), but the first 2 examples didn't work as Java complained about the slashes in the name. The 3rd one worked but nothing was visible in (appName)/files/. I don't know if this by design for security reasons, or if the file was really not there. The code is

String name = getFileName();
try {
        FileOutputStream fOut = new FileOutputStream(name);
        OutputStreamWriter osw = new OutputStreamWriter(fOut);
        osw.write("test1");
        osw.flush();
        osw.close();
        fOut.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

Where I would really like the file to be would be in Internal Storage. I created a folder called myData, which I can see both on the phone and on the PC. The question is: how do I direct the application to write to Internal Storage. I recognize that this isn't "secure", but I just want to get the file.

To write to the Internal storage one needs this in the manifest

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

If we should decide to put the file on a cloud server, is there a standard way to do that?

Thanks, Ilan

Upvotes: 0

Views: 1127

Answers (2)

Sanjeet
Sanjeet

Reputation: 2403

If you are using getFilesDir() then it returns a path which is specific to android application. User's simply can't access the path returned by getFilesDir().

If you have a rooted device then you can get access to the above path.

If you want that only your application can access files stored by you then use getFilesDir(), else you can use

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS).getAbsolutePath();

Upvotes: 2

Zhi Kai
Zhi Kai

Reputation: 1587

I understand that you want to write a file to your phone's Documents folder, am I right? If so, the following may be of help where you can write your .csv files at. 

 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);

Upvotes: 0

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