Android read/write permission of a folder

Question

I am doing a new android app. I want to create a folder in "Android" folder which is available in sdcard. Before that I want to check whether the folder has read/write permission. How can I get that? can anyone help me to do this.

A folder cannot have read/write permissions. Its a folder. Users are the ones with read/write permissions to the folders. Is that what you're looking for? — Raghav Sood, Feb 10 '13 at 12:33

score 19 · Accepted Answer · answered Feb 10 '13 at 12:34

19

You do it the old-school java way. Create a file object and call canWrite() and canRead().

File f = new File("path/to/dir/or/file");
if(f.canWrite()) {
    // hell yeah :)
}

answered Feb 10 '13 at 12:34

poitroae

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score 6 · Answer 2 · answered Feb 10 '13 at 13:30

To create a folder in Android folder the best way is:

 File path = getExternalFilesDir();

It will be your own directory so if you have permission for this, you will be able to read/write it if the external storage is available. To check this use this code:

boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();

if (Environment.MEDIA_MOUNTED.equals(state)) {
    // We can read and write the media
    mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
    // We can only read the media
    mExternalStorageAvailable = true;
    mExternalStorageWriteable = false;
} else {
    // Something else is wrong. It may be one of many other states, but all we need
    //  to know is we can neither read nor write
    mExternalStorageAvailable = mExternalStorageWriteable = false;
}

Permissions required to write:

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

Android read/write permission of a folder

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