Problem with SpannableString and ClickableSpan

I wrote this code:

public class BaldrActivity extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.a_dei_baldr);

    String myString = "Click Here!";

    SpannableString ss = new SpannableString(myString);

    ClickableSpan clickableSpan1 = new ClickableSpan() {
        @Override
        public void onClick(View widget) {
            Toast.makeText(BaldrActivity.this, "hello world", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void updateDrawState(TextPaint ds) {
            super.updateDrawState(ds);
            ds.setColor(Color.BLUE);
            ds.setUnderlineText(false);
        }
    };

    ss.setSpan(clickableSpan1, 6, 11, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

    TextView tv = findViewById(R.id.tv_baldr1);
    tv.setText(myString);
    tv.setMovementMethod(LinkMovementMethod.getInstance());
}

}

but... nothing changes. I mean, the code is builded correctly, the app does not crash, the TextView actually changes in "Click Here!", but it is not clickable and its appereance does not change... why?

Looks like you are setting String in line:

tv.setText(myString);

instead, set SpannableString that you are creating:

tv.setText(ss);