Java tutorial
//package com.java2s; import android.os.Environment; import java.io.File; public class Main { public static void deleteCSV() { File myDir = new File(Environment.getExternalStorageDirectory() + "/Caffeine_Counter_History"); deleteRecursive(myDir); } public static void deleteRecursive(File fileOrDirectory) { if (fileOrDirectory.isDirectory()) for (File child : fileOrDirectory.listFiles()) deleteRecursive(child); fileOrDirectory.delete(); } }