How to programmatically move copy and delete files and directories on SD

Question

I want to programmatically move  copy and delete files and directories on SD card  I ve done a Google search but couldn t find anything useful

User · Answer

To move a file this api can be used but you need atleat 26 as api level -

move file

But if you want to move directory no support is there so this native code can be used

    import org.apache.commons.io.FileUtils;

    import java.io.IOException;
    import java.io.File;

    public class FileModule {

    public void moveDirectory(String src, String des) {
    File srcDir = new File(src);
    File destDir = new File(des);
     try {
        FileUtils.moveDirectory(srcDir,destDir);
    } catch (Exception e) {
      Log.e("Exception" , e.toString());
      }
    }

    public void deleteDirectory(String dir) {
      File delDir = new File(dir);
      try {
        FileUtils.deleteDirectory(delDir);
       } catch (IOException e) {
      Log.e("Exception" , e.toString());
      }
     }
    }

User · Answer

set the correct permissions in the manifest        lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt    below is a function that will programmatically move your file  private void moveFile String inputPath  String inputFile  String outputPath         InputStream in   null      OutputStream out   null      try              create output directory if it doesn t exist         File dir   new File  outputPath            if   dir exists                          dir mkdirs                        in   new FileInputStream inputPath   inputFile                   out   new FileOutputStream outputPath   inputFile            byte   buffer   new byte 1024           int read          while   read   in read buffer      -1                out write buffer  0  read                     in close            in   null                  write the output file             out flush            out close            out   null              delete the original file         new File inputPath   inputFile  delete                         catch  FileNotFoundException fnfe1            Log e  tag   fnfe1 getMessage                     catch  Exception e            Log e  tag   e getMessage                To Delete the file use   private void deleteFile String inputPath  String inputFile        try              delete the original file         new File inputPath   inputFile  delete                catch  Exception e            Log e  tag   e getMessage               To copy   private void copyFile String inputPath  String inputFile  String outputPath         InputStream in   null      OutputStream out   null      try              create output directory if it doesn t exist         File dir   new File  outputPath            if   dir exists                          dir mkdirs                        in   new FileInputStream inputPath   inputFile                   out   new FileOutputStream outputPath   inputFile            byte   buffer   new byte 1024           int read          while   read   in read buffer      -1                out write buffer  0  read                     in close            in   null                  write the output file  You have now copied the file              out flush            out close            out   null                  catch  FileNotFoundException fnfe1            Log e  tag   fnfe1 getMessage                       catch  Exception e            Log e  tag   e getMessage

User · Answer

Xamarin Android  public static bool MoveFile string CurrentFilePath  string NewFilePath        try               using  var f   new File CurrentFilePath           using  var i   new FileInputStream f           using  var o   new FileOutputStream NewFilePath                         i Channel TransferTo 0  i Channel Size    o Channel               f Delete                       return true            catch   return false       public static bool CopyFile string CurrentFilePath  string NewFilePath        try               using  var i   new FileInputStream CurrentFilePath           using  var o   new FileOutputStream NewFilePath               i Channel TransferTo 0  i Channel Size    o Channel            return true            catch   return false       public static bool DeleteFile string FilePath        try               using  var file   new File FilePath               file Delete             return true            catch   return false

User · Answer

Use standard Java I O  Use Environment getExternalStorageDirectory   to get to the root of external storage  which  on some devices  is an SD card

User · Answer

Copy file using Square s Okio   BufferedSink bufferedSink   Okio buffer Okio sink destinationFile    bufferedSink writeAll Okio source sourceFile    bufferedSink close

User · Answer

Moving file using kotlin  App has to have permission to write a file in destination directory    Throws FileNotFoundException  class  IOError  class  private fun moveTo source  File  dest  File  destDirectory  File    null         if  destDirectory  exists      false            destDirectory mkdir              val fis   FileInputStream source      val bufferLength   1024     val buffer   ByteArray bufferLength      val fos   FileOutputStream dest      val bos   BufferedOutputStream fos  bufferLength      var read   fis read buffer  0  read      while  read    -1            bos write buffer  0  read          read   fis read buffer     if read value is -1  it escapes loop            fis close       bos flush       bos close        if   source delete              HLog w TAG  klass   failed to delete   source name

User · Answer

File from   new File Environment getExternalStorageDirectory   getAbsolutePath   getAbsolutePath     kaic1 imagem jpg    File to   new File Environment getExternalStorageDirectory   getAbsolutePath     kaic2 imagem jpg    from renameTo to

User · Answer

If you are using Guava  you can use Files move from  to

User · Answer

Function for moving files   private void moveFile File file  File dir  throws IOException       File newFile   new File dir  file getName         FileChannel outputChannel   null      FileChannel inputChannel   null      try           outputChannel   new FileOutputStream newFile  getChannel            inputChannel   new FileInputStream file  getChannel            inputChannel transferTo 0  inputChannel size    outputChannel           inputChannel close            file delete          finally           if  inputChannel    null  inputChannel close            if  outputChannel    null  outputChannel close

User · Answer

Delete  public static void deleteRecursive File fileOrDirectory      if  fileOrDirectory isDirectory        for  File child   fileOrDirectory listFiles            deleteRecursive child        fileOrDirectory delete             check this link for above function   Copy  public static void copyDirectoryOneLocationToAnotherLocation File sourceLocation  File targetLocation      throws IOException    if  sourceLocation isDirectory          if   targetLocation exists              targetLocation mkdir               String   children   sourceLocation list        for  int i   0  i  lt  sourceLocation listFiles   length  i               copyDirectoryOneLocationToAnotherLocation new File sourceLocation  children i                    new File targetLocation  children i             else        InputStream in   new FileInputStream sourceLocation        OutputStream out   new FileOutputStream targetLocation           Copy the bits from instream to outstream     byte   buf   new byte 1024       int len      while   len   in read buf    gt  0            out write buf  0  len             in close        out close           Move  move is nothing just copy the folder one location to another then delete the folder thats it  manifest        lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt

User · Answer

Permissions    lt uses-permission android name  android permission READ EXTERNAL STORAGE    gt   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt   Get SD card root folder   Environment getExternalStorageDirectory    Delete file  this is an example on how to delete all empty folders in a root folder   public static void deleteEmptyFolder File rootFolder       if   rootFolder isDirectory    return       File   childFiles   rootFolder listFiles        if  childFiles  null  return      if  childFiles length    0           rootFolder delete          else           for  File childFile   childFiles               deleteEmptyFolder childFile                      Copy file   public static void copyFile File src  File dst  throws IOException       FileInputStream var2   new FileInputStream src       FileOutputStream var3   new FileOutputStream dst       byte   var4   new byte 1024        int var5      while  var5   var2 read var4    gt  0            var3 write var4  0  var5              var2 close        var3 close       Move file   copy   delete source file

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Move File or Folder   public static void moveFile File srcFileOrDirectory  File desFileOrDirectory  throws IOException       File newFile   new File desFileOrDirectory  srcFileOrDirectory getName         try  FileChannel outputChannel   new FileOutputStream newFile  getChannel    FileChannel inputChannel   new FileInputStream srcFileOrDirectory  getChannel              inputChannel transferTo 0  inputChannel size    outputChannel           inputChannel close            deleteRecursive srcFileOrDirectory            private static void deleteRecursive File fileOrDirectory        if  fileOrDirectory isDirectory            for  File child   Objects requireNonNull fileOrDirectory listFiles                 deleteRecursive child       fileOrDirectory delete

User · Answer

Copy the local DB file of an application to the root of external storage directory         param context the Context of application         param dbName The name of the DB             private void copyDbToExternalStorage Context context   String dbName            try               File name   context getDatabasePath dbName               File sdcardFile   new File Environment getExternalStorageDirectory      test db     The name of output file             sdcardFile createNewFile                InputStream inputStream   null              OutputStream outputStream   null              inputStream   new FileInputStream name               outputStream   new FileOutputStream sdcardFile               byte   buffer   new byte 1024               int read              while   read   inputStream read buffer      -1                    outputStream write buffer  0  read                             inputStream close                outputStream flush                outputStream close                      catch  Exception e                Log e  Exception    e toString

User · Answer

Move file    File from   new File Environment getExternalStorageDirectory   getAbsolutePath     kaic1 imagem jpg    File to   new File Environment getExternalStorageDirectory   getAbsolutePath     kaic2 imagem jpg    from renameTo to

[android] How to programmatically move, copy and delete files and directories on SD?

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