How to delete all files and folders in one folder on Android

Question

I use this code to delete all files:

File root = new File(\"root path\");
File[] Files = root.listFiles();
if(Files != null) {
    int j;
    for(j = 0; j < F         


        

Answer 1

if storageDir is a directory

for(File tempFile : storageDir.listFiles()) {
    tempFile.delete();
}

Answer 2

You can check like this:

for(j = 0; j < Files.length; j++) {

    if(file.isDirectory()){
        for(File f : file.listFiles()){
        System.out.println(Files[j].getAbsolutePath());
        System.out.println(Files[j].delete());
    }
    else {
        System.out.println(Files[j].getAbsolutePath());
        System.out.println(Files[j].delete());
    }
}

Answer 3

Simplest way would be to use FileUtils.deleteDirectory from the Apache Commons IO library.

File dir = new File("root path");
FileUtils.deleteDirectory(dir);

Bear in mind this will also delete the containing directory.

Add this line in gradle file to have Apache

compile 'org.apache.commons:commons-io:1.3.2'  

Answer 4

you can try this code to delete files and subfiles

public void deleteFile(File f){
String[] flist=f.list();
for(int i=0;i<flist.length;i++){
    System.out.println(" "+f.getAbsolutePath());
    File temp=new File(f.getAbsolutePath()+"/"+flist[i]);
    if(temp.isDirectory()){
       deleteFile(temp) ;
       temp.delete();
    }else{
    temp.delete();
    }

Answer 5

As a kotlin extension function you can do this

fun File.deleteDirectoryFiles(){
    this.listFiles().forEach {
        if(it.isDirectory){
            it.deleteDirectoryFiles()
        }else{
            it.delete()
        }
    }

    this.delete()
}

Then you can just do

file.deleteDirectoryFiles()

Answer 6

For your case, this works perfectly http://commons.apache.org/proper/commons-io/apidocs/org/apache/commons/io/FileUtils.html#cleanDirectory(java.io.File)

File dir = new File("dir_path");
if(dir.exists() && dir.isDirectory()) {
    FileUtils.cleanDirectory(dir);
}

If you wanna delete the folder itself. (It does not have to be empty). Can be used for files too.

http://commons.apache.org/proper/commons-io/apidocs/org/apache/commons/io/FileUtils.html#forceDelete(java.io.File)

File dir = new File("dir_path");
if(dir.exists()) {
    FileUtils.forceDelete(dir);
}