Write a file in external storage in Android

Question

I want to create a file in external storage sdCard and write to it.I have searched through internet and try but not getting the result,I have added permission in Android Manifest file as well,I am doing this on Emulator,I am trying the following code and getting a ERRR", "Could not create file".

btnWriteSDFile = (Button) findViewById(R.id.btnWriteSDFile);
btnWriteSDFile.setOnClickListener(new OnClickListener() {
    //private Throwable e;

    @Override
    public void onClick(View v) {
        // write on SD card file data from the text box
        try {
            File myFile = new File("/sdcard/mysdfile.txt");
            myFile.createNewFile();
            FileOutputStream fOut = new FileOutputStream(myFile);
            OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
            myOutWriter.append(txtData.getText());
            myOutWriter.close();
            fOut.close();

        } catch (Exception e) {
              Log.e("ERRR", "Could not create file",e);
        } 
    }// onClick
}); // btnWriteSDFile

Answer 1

You should read the documentation on storing stuff externally on Android. There's a multitude of problems that could exist with your current code, and I think going over the documentation might help you iron them out.

Answer 2

Supplemental Answer

After writing to external storage, some file managers don't see the file right away. This can be confusing if a user thinks they copied something to the SD card, but then can't find it there. So after you copy the file, run the following code to notify file managers of its presence.

MediaScannerConnection.scanFile(
        context,
        new String[]{myFile.getAbsolutePath()},
        null,
        null);

See the documentation and this answer for more.