Button startRangeSearch = findViewById(R.id.searchButton);
EditText editText1 = findViewById(R.id.editText1);
EditText editText1 = findViewById(R.id.editText1);
startRangeSearch.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                     RealmResults<Dog.class> dogs = realm.where(Dog.class).greaterThan("name", editText1.getText().toString()).lessThan("name", editText2.getText().toString()).findAll();
                }
            });