Delete folder from internal storage in android?

问题

How to delete folder(contain some folder and file) from internal storage? Folder have some below tree.

folder
|_________  C2 (folder)
             |________1 (folder)
                      |________1.gif
                      |________2.gif
                      |________3.gif
                      |________4.gif
             |________2 (folder)
                      |________1.gif
                      |________2.gif
                      |________3.gif
                      |________4.gif
             |________3 (folder)
                      |________1.gif
                      |________2.gif
                      |________3.gif
                      |________4.gif
             |________4 (folder)
                      |________1.gif
                      |________2.gif
                      |________3.gif
                      |________4.gif
             |________5 (folder)
                      |________1.gif
                      |________2.gif
                      |________3.gif
                      |________4.gif

|_________  C2.xml (file)

I want to delete folder and containing all files

fil.delete();

System.out.println("boolean =>" + fil.delete());

but above code shows false. Please help.

回答1:

Check this out.

public void deleteRecursive(File fileOrDirectory) {

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

   fileOrDirectory.delete();
 }

for explaination How to delete a whole folder and content?

回答2:

You can't delete root folder if sub folder contains any files. So for that you have to first delete each of sub files and then you will able to remove the folder.

Your code is valid, I just update like:

 boolean deleted = mypath.delete();

ie. mypath is your File Directory.

回答3:

Let me tell you first thing you cannot delete the Rootfolder because it is a system folder. As you delete it manually on phone it will delete the contents of that folder, but not the Root folder. You can delete its contents by using the method below:

private void DeleteRecursive(File fileOrDirectory) {
    if (fileOrDirectory.isDirectory())
        for (File child : fileOrDirectory.listFiles())
        {
            child.delete();
            DeleteRecursive(child);
        }

    fileOrDirectory.delete();
}

回答4:

Using Apache commons-io, which is just one line of code.

FileUtils.deleteDirectory(getAlbumStorageDir(directoryName));

来源：https://stackoverflow.com/questions/13410949/delete-folder-from-internal-storage-in-android