How to get list of file names in downloads folder?

Question

I tried this:

File f =Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);

        System.out.println(f.list());
        System.out.println(f.listFiles().toString());

But it shows null. I have given permissions for read and write in manifest.

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

https://stackoverflow.com/questions/32635704/android-permission-doesnt-work-even-if-i-have-declared-it — CommonsWare, Jan 03 '18 at 12:17

Goku · Accepted Answer · 2018-01-03T12:27:01.220

1

The READ_EXTERNAL_STORAGE is dangerous permission You need to ask it runtime permission

Beginning in Android 6.0 (API level 23), users grant permissions to apps while the app is running, not when they install the app.

You need to ask runtime permission

and also try this

Try this

private void getfiles() {
    String[] filenames = new String[0];
    ArrayList<String> fileArrayList = new ArrayList<>();
    File path = new File(Environment.getExternalStorageDirectory() + "/folder_name");
    if (path.exists()) {
        filenames = path.list();
    }
    for (int i = 0; i < filenames.length; i++) {
        fileArrayList.add(path.getPath() + "/" + filenames[i]);
        Log.e("fileArrayList", fileArrayList.get(i));

    }
}

edited Jan 03 '18 at 12:27

answered Jan 03 '18 at 12:19

Goku

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Thanks asking for the runtime permissions solved my problem. – user6731698 Jan 03 '18 at 12:23
@user6731698 happy to help you – Goku Jan 03 '18 at 12:24

score 1 · Answer 2 · answered Jan 03 '18 at 12:35

File f = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);

List<String> files = getList(f);


private List<String> getList(File parentDir, String pathToParentDir) {
ArrayList<String> inFiles = new ArrayList<String>();
String[] fileNames = parentDir.list();

for (String fileName : fileNames) {
    if (fileName.toLowerCase().endsWith(".txt") || 
fileName.toLowerCase().endsWith(".rtf") || 
fileName.toLowerCase().endsWith(".doc") || 
fileName.toLowerCase().endsWith(".txd")) {
        inFiles.add(pathToParentDir + fileName);
    } else {
        File file = new File(parentDir.getPath() + "/" + fileName);
        if (file.isDirectory()) {
            inFiles.addAll(getList(file, pathToParentDir + fileName + "/"));
        }
    }
}

return inFiles;
}

How to get list of file names in downloads folder?

2 Answers2