Java tutorial
//package com.java2s; import java.io.File; import android.os.Environment; public class Main { public static String RenameFileToNewPath(String oldpath) { String path = oldpath; path = path.replace("/mnt/sdcard/", ""); String new_path = path.replace(".ck", ""); File sdcard = Environment.getExternalStorageDirectory(); File from = new File(sdcard, oldpath); File to = new File(sdcard, new_path); from.renameTo(to); return to.toString(); } }