How to get the android Path string to a file on Assets folder

Question

I need to know the string path to a file on assets folder  because I m using a map API that needs to receive a string path  and my maps must be stored on assets folder  This is the code i m trying       MapView mapView   new MapView this       mapView setClickable true       mapView setBuiltInZoomControls true       mapView setMapFile  file    android asset m1 map        setContentView mapView     Something is going wrong with  file    android asset m1 map  because the map is not being loaded   Which is the correct string path file to the file m1 map stored on my assets folder   Thanks  EDIT for Dimitru  This code doesn t works  it fails on is read buffer   with IOException          try               InputStream is   getAssets   open  m1 map                int size   is available                byte   buffer   new byte size               is read buffer               is close                text   new String buffer             catch  IOException e   throw new RuntimeException e

User · Answer

Have a look at the ReadAsset java from API samples that come with the SDK            try           InputStream is   getAssets   open  read asset txt                We guarantee that the available method returns the total            size of the asset     of course  this does mean that a single            asset can t be more than 2 gigs          int size   is available                Read the entire asset into a local byte buffer          byte   buffer   new byte size           is read buffer           is close                Convert the buffer into a string          String text   new String buffer               Finally stick the string into the text view          TextView tv    TextView findViewById R id text           tv setText text         catch  IOException e               Should never happen          throw new RuntimeException e

User · Answer

AFAIK the files in the assets directory don t get unpacked   Instead  they are read directly from the APK  ZIP  file   So  you really can t make stuff that expects a file accept an asset  file    Instead  you ll have to extract the asset and write it to a seperate file  like Dumitru suggests     File f   new File getCacheDir     m1 map      if   f exists    try        InputStream is   getAssets   open  m1 map        int size   is available        byte   buffer   new byte size       is read buffer       is close          FileOutputStream fos   new FileOutputStream f       fos write buffer       fos close        catch  Exception e    throw new RuntimeException e        mapView setMapFile f getPath

User · Answer

Just to add on Jacek s perfect solution  If you re trying to do this in Kotlin  it wont work immediately  Instead  you ll want to use this     Throws IOException  class  fun getSplashVideo context  Context   File       val cacheFile   File context cacheDir   splash video       try           val inputStream   context assets open  splash video           val outputStream   FileOutputStream cacheFile          try               inputStream copyTo outputStream            finally               inputStream close               outputStream close                   catch  e  IOException            throw IOException  Could not open splash video   e            return cacheFile

User · Answer

You can use this method       public static File getRobotCacheFile Context context  throws IOException           File cacheFile   new File context getCacheDir     robot png            try               InputStream inputStream   context getAssets   open  robot png                try                   FileOutputStream outputStream   new FileOutputStream cacheFile                   try                       byte   buf   new byte 1024                       int len                      while   len   inputStream read buf    gt  0                            outputStream write buf  0  len                                           finally                       outputStream close                                    finally                   inputStream close                            catch  IOException e                throw new IOException  Could not open robot png   e                     return cacheFile          You should never use InputStream available   in such cases  It returns only bytes that are buffered  Method with  available   will never work with bigger files and will not work on some devices at all   In Kotlin   D     Throws IOException  class  fun getRobotCacheFile context  Context   File   File context cacheDir   robot png        also           it outputStream   use   cache - gt  context assets open  robot png   use   it copyTo cache

[android] How to get the android Path string to a file on Assets folder?

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