Copy directory ,sub directories and files to sd card - android

I use the following code to copy a particular directory and its contents to the sd card. The directory is placed inside `res/raw` folder. Following is the code I use: ``` public class CopyActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); copyFilesToSdCard(); } static String extStorageDirectory = Environment.getExternalStorageDirectory().toString(); final static String TARGET_BASE_PATH = extStorageDirectory+"/Android/data/"; private void copyFilesToSdCard() { copyFileOrDir(""); } private void copyFileOrDir(String path) { AssetManager assetManager = this.getAssets(); String assets[] = null; try { Log.i("tag", "copyFileOrDir() "+path); assets = assetManager.list(path); if (assets.length == 0) { copyFile(path); } else { String fullPath = TARGET_BASE_PATH + path; Log.i("tag", "path="+fullPath); File dir = new File(fullPath); if (!dir.exists()) if (!dir.mkdirs()); Log.i("tag", "could not create dir "+fullPath); for (int i = 0; i < assets.length; ++i) { String p; if (path.equals("")) p = ""; else p = path + "/"; copyFileOrDir( p + assets[i]); } } } catch (IOException ex) { Log.e("tag", "I/O Exception", ex); } } private void copyFile(String filename) { AssetManager assetManager = this.getAssets(); InputStream in = null; OutputStream out = null; String newFileName = null; try { Log.i("tag", "copyFile() "+filename); in = assetManager.open(filename); if (filename.endsWith(".jpg")) // extension was added to avoid compression on APK file newFileName = TARGET_BASE_PATH + filename.substring(0, filename.length()-4); else newFileName = TARGET_BASE_PATH + filename; out = new FileOutputStream(newFileName); byte[] buffer = new byte[1024]; int read; while ((read = in.read(buffer)) != -1) { out.write(buffer, 0, read); } in.close(); in = null; out.flush(); out.close(); out = null; } catch (Exception e) { Log.e("tag", "Exception in copyFile() of "+newFileName); Log.e("tag", "Exception in copyFile() "+e.toString()); } } } ``` exception: ``` Exception in copyFile() of /mnt/sdcard/Android/data/raw/edu/anees.txt Exception in copyFile() java.io.FileNotFoundException: /mnt/sdcard/Android/data/raw/edu/anees.txt: open failed: ENOENT (No such file or directory) ``` Can someone please let me know what causes this issue and solution for the same. ref: How to copy files from 'assets' folder to sdcard? EDIT I could resolve the exception with one of the tips regarding permission which was posted as one answer here. Now I encounter another issue which is as follows: The following log says I cannot create a folder in the following path: ``` Log.i("tag", "could not create dir "+fullPath);// fullPath = /mnt/sdcard/Android/data/raw ``` I do not want to have the data stored inside /mnt/sdcard/Android/data/raw, but instead, I want to have the contents of the raw folder inside assets to be copied to the path /mnt/sdcard/Android/data which is not happening with the piece of code I use from the reference link I gave. Any obvious reasons that might cause this with the code I gave?