Java tutorial
//package com.java2s; import android.content.Context; import android.os.Environment; import java.io.File; import java.io.IOException; public class Main { public static File getFilesSubDirectory(Context context, String filesSubDir) { File appFilesSubDir = new File(getFilesDirectory(context), filesSubDir); if (!appFilesSubDir.exists()) appFilesSubDir.mkdirs(); //String filename = String.valueOf(url.hashCode()); // Another possible solution (thanks to grantland) // String filename; /* * try { filename = URLEncoder.encode(url, "UTF-8"); } catch * (UnsupportedEncodingException e) { * e.printStackTrace(); } */ return appFilesSubDir; } /** * Returns application files directory. Files directory will be created on SD card * <i>("/Android/data/[app_package_name]/files")</i> if card is mounted. Else - Android defines files directory on * device's file system. * * @param context Application context * @return Files {@link File directory} */ public static File getFilesDirectory(Context context) { File appFilesDir = null; if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { appFilesDir = getExternalFilesDir(context); } if (appFilesDir == null) { appFilesDir = context.getFilesDir(); } return appFilesDir; } private static File getExternalFilesDir(Context context) { File dataDir = new File(new File(Environment.getExternalStorageDirectory(), "Android"), "data"); File appFilesDir = new File(new File(dataDir, context.getPackageName()), "files"); if (!appFilesDir.exists()) { if (!appFilesDir.mkdirs()) { //L.w("Unable to create external cache directory"); return null; } try { new File(appFilesDir, ".nomedia").createNewFile(); } catch (IOException e) { //L.i("Can't create \".nomedia\" file in application external cache directory"); return null; } } return appFilesDir; } }