How to Read, Write and Copy file in Blackberry

It is very common feature in Blackberry to read/write/copy file programatically in BlackBerry.

Read file in the SDCard in the following way:

InputStream inputStream = null; FileConnection fileConnection = (FileConnection) Connector.open( "file:///SDCard/testfile.txt"); if (fileConnection.exists()) { inputStream = fconn.openInputStream(); } ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); byte[] buffer = new byte[BUFFER_SIZE]; while (true) { int bytesRead = inputStream.read( buffer, 0, BUFFER_SIZE ); if (bytesRead == -1) break; byteArrayOutputStream.write( buffer, 0, bytesRead ); } byteArrayOutputStream.flush(); byte[] result = byteArrayOutputStream.toByteArray(); byteArrayOutputStream.close(); String resultString = new String(result);

Write/Save file in SDCard in the following way:

FileConnection fc = (FileConnection) Connector.open(System.getProperty("file:///SDCard/"+"fileName.txt"),Connector.READ_WRITE); if(!fc.exists()) { fc.create(); } OutputStream os =fc.openOutputStream(); os.write("Test"); os.close(); fc.close()

Copy file in SDCard in the following way:

public static void copyFile(String srFile, String dtFile) { try { FileConnection f1; FileConnection f2; f1 = (FileConnection) Connector.open(srFile,Connector.READ_WRITE); f2 = (FileConnection) Connector.open(dtFile,Connector.READ_WRITE); if(!f2.exists()) // if file does not exists , create a new one { f2.create(); } InputStream is = f1.openInputStream(); OutputStream os =f2.openOutputStream(); byte[] buf = new byte[1024]; int len; while ((len = is.read(buf)) > 0) { os.write(buf, 0, len); } is.close(); os.close(); } catch(IOException e) { } }

Also check this link for more information about file path.