Java tutorial
//package com.java2s; import java.io.File; import java.io.IOException; import android.content.Context; public class Main { public static File getMateralDir(Context context) { File dir = null; dir = new File(context.getCacheDir() + File.separator + "wanjia" + File.separator + "material"); File nomediaFile = new File(dir.getAbsolutePath() + File.separator + ".nomedia"); if (!dir.exists()) { dir.mkdirs(); } if (!nomediaFile.exists()) { try { nomediaFile.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } return dir; } }