public OnClickListener saveButtonListener = new OnClickListener()
   // create a new Button and add it to the ScrollView
   {
      @Override
      public void onClick(View v)
      {

          AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setView(getLayoutInflater().inflate(R.layout.custom_dialog_add, null));
            builder.create();

            View view = getLayoutInflater().inflate(R.layout.custom_dialog_add, null);

            builder.setPositiveButton(R.string.OK, null);
            AlertDialog Custom_dialog_add = builder.create();
            Custom_dialog_add.show();

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(YOUREDITTEXTHERE, InputMethodManager.SHOW_IMPLICIT);