Writing a file to sdcard

Question

I'm trying to write a file from an Http post reply to a file on the sdcard. Everything works fine until the byte array of data is retrieved.

I've tried setting WRITE_EXTERNAL_STORAGE permission in the manifest and tried many different combinations of tutorials I found on the net.

All I could find was using the openFileOutput("",MODE_WORLD_READABLE) method, of the activity but how my app writes file is by using a thread. Specifically, a thread is invoked from another thread when a file has to be written, so giving an activity object didn't work even though I tried it.

The app has come a long way and I cannot change how the app is currently written. Please, someone help me?

CODE:

    File file = new File(bgdmanip.savLocation);
    FileOutputStream filecon = null;
            filecon = new FileOutputStream(file);

// bgdmanip.savLocation holds the whole files path

        byte[] myByte;
        myByte = Base64Coder.decode(seReply);
        Log.d("myBytes", String.valueOf(myByte));
        bos.write(myByte);
        filecon.write(myByte);
        myvals = x * 11024;

seReply is a string reply from HttpPost response. the second set of code is looped with reference to x. the file is created but remains 0 bytes

Answer 1

The openFileOutput() method writes data to your application's private data area (not the SD card), so that's probably not what you want. You should be able to call Environment.getExternalStorageDirectory() to get the root path to the SD card and use that to create a FileOutputStream. From there, just use the standard java.io routines.