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Here's the source code - ONCREATE of activity

EditText editText = findViewById(R.id.editText);

editText.setFilters(new InputFilter[] { new InputFilter() { @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { for (int i = start; i < end; i++) { int type = Character.getType(source.charAt(i)); if (type == Character.SURROGATE || type == Character.OTHER_SYMBOL) { Toast.makeText(getApplicationContext(), "Emojis are not allowed", Toast.LENGTH_SHORT).show(); return ""; } } return null; } } });