public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CallBackUtil.setCallBack(this);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
CallBackUtil.doCallBack();
}
}, 1000);
}
@Override
public void solution(String string) {
Log.e(“Enoment”, “receive method from CallBackUtil” + string);
}
}