How to delete file in android?

Question

I have used the android internal storage to save a file for my application.

Ex

File rootFolder = context.getFilesDir();
File albumIdFolder = new File(rootFolder,getAlbumId());

Basicaly i want to delete the folder

So i tried with

 File rootFolder = context.getFilesDir();
 File albumIdFolder = new File(rootFolder,getAlbumId());
 albumIdFolder.delete()

but this not working not deleting folder

I readed this answares but not worked in my case please help me solve this issue i am not getting where i am going wong.

Delete file from internal storage

How to delete internal storage file in android?

Edit 2

Ex ^(folder hierarchy)

data
    user
        0
         packageName
                    files
                        155775346846131
                                       otherData

i want to delete 155775346846131 folder

@A.Najafi sir i know it releted to this question but this solution not worked for me — Joker, Jul 16 '19 at 06:06
You need to delete all files in the folder before you can delete the folder. You can only delete empty folders. — ByteHamster, Jul 16 '19 at 06:06
if you have files in your folder then first delete files then delete folder/directory — Anas Mehar, Jul 16 '19 at 06:07
@ApploneInfotech: check [How to delete a whole folder and content?](https://stackoverflow.com/questions/4943629/how-to-delete-a-whole-folder-and-content) — ρяσѕρєя K, Jul 16 '19 at 06:07
Possible duplicate of [How to delete a whole folder and content?](https://stackoverflow.com/questions/4943629/how-to-delete-a-whole-folder-and-content) — tripleee, Jul 16 '19 at 06:11
@ApploneInfotech no it's not work you must delete its child/files first. — Anas Mehar, Jul 16 '19 at 06:20
@ApploneInfotech Because android have linux kernel so in linux you must delete child before dir — Anas Mehar, Jul 16 '19 at 06:36
@AnasMehar can u provide answare with discription i will accept it thank you — Joker, Jul 16 '19 at 06:49

score 4 · Accepted Answer · answered Jul 16 '19 at 06:10

You can delete files with folder like as below,

void deleteFiles(Context context) {
    File rootFolder = context.getFilesDir();
    File fileDir = new File( rootFolder,getAlbumId());
    if (fileDir.exists()) {
        File[] listFiles = fileDir.listFiles();
        for (File listFile : listFiles) {
        if (!listFile.delete()) {
            System.err.println( "Unable to delete file: " + listFile );
        }
        }
    }
    rootFolder.delete();
}

Source : How to delete a whole folder and content?

Don't forgot to give Storage permission.

score 1 · Answer 2 · answered Jul 16 '19 at 07:33

You can delete files and folders recursively like this:

public void deleteFolderRecursive(File fileOrDirectory) {

   if (fileOrDirectory.isDirectory()) {
   for (File child : fileOrDirectory.listFiles()) {
      deleteFolderRecursive(child);
   }
}

 fileOrDirectory.delete();
}

How to delete file in android?

2 Answers2