How to delete internal storage file in android?

Question

I have used the Android internal storage to save a file for my application (using openFileOutput) but I would like to delete that file, is it possible and how?

Solution 1

File dir = getFilesDir();
File file = new File(dir, "my_filename");
boolean deleted = file.delete();

Solution 2

I know this is a bit of an oldie, but the docs say to use:

deleteFile("filename");

rather than:

File.delete();

Which if you are already using:

getFilesDir();

kind of makes sense.

Solution 3

You should always delete files that you no longer need. The most straightforward way to delete a file is to have the opened file reference call delete() on itself.

myFile.delete();

If the file is saved on internal storage, you can also ask the Context to locate and delete a file by calling deleteFile():

myContext.deleteFile(fileName);

Note: When the user uninstalls your app, the Android system deletes the following: All files you saved on internal storage All files you saved on external storage using getExternalFilesDir(). However, you should manually delete all cached files created with getCacheDir() on a regular basis and also regularly delete other files you no longer need.

Source : http://developer.android.com/training/basics/data-storage/files.html

Solution 4

If you want to delete all files from a folder then use the following function:

private void deleteTempFolder(String dir) {
        File myDir = new File(Environment.getExternalStorageDirectory() + "/"+dir);
        if (myDir.isDirectory()) {
            String[] children = myDir.list();
            for (int i = 0; i < children.length; i++) {
                new File(myDir, children[i]).delete();
            }
        }
    }

Folder must be present on storage. If not we can check one more codition for it.

  if (myDir.exists() && myDir.isDirectory()) {
//write same defination for it.
}

Solution 5

new File(mUri.toString).delete(); 

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Comments

[Steve Piercy]

This answer was flagged as low-quality because of its length and content. Suggest adding a description of what it does and how it answers the question.

[MartianMartian]

what is the rule for my_filename ?