Spinner spinner=findViewById(R.id.spinner);
        ArrayAdapter adapter=ArrayAdapter.createFromResource(MainActivity.this,R.array.lang, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);
        spinner.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                String txt=parent.getItemAtPosition(position).toString();
                Toast.makeText(MainActivity.this, txt, Toast.LENGTH_SHORT).show();
            }
        });