Java tutorial
//package com.java2s; import android.os.Environment; import java.io.File; public class Main { static public void deleteAllSDContent() { String dir_path = Environment.getExternalStorageDirectory().getPath() + "/swift"; File f = new File(dir_path); if (f.isDirectory()) { String files[] = f.list(); for (int i = 0; i < files.length; i++) { new File(dir_path, files[i]).delete(); } } } }