title: Android Studio: Cannot resolve symbol 'activity_profile'
body: <pre><code>public boolean onNavigationItemSelected(MenuItem item) {
      // Handle navigation view item clicks here.
      int id = item.getItemId();
  
      if (id == R.id.nav_profile) {
          // Handle the camera action
      } else if (id == R.id.nav_goals) {
          startActivity(new Intent(activity_profile.this, activity_goals.class));
  
      } else if (id == R.id.nav_timetable) {
  
      } else if (id == R.id.nav_history) {
  
      } else if (id == R.id.nav_tracking) {
  
      } else if (id == R.id.nav_matchmaker) {
  
      }
  
      DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
      drawer.closeDrawer(GravityCompat.START);
      return true;
  }
  </code></pre>
  
  <p>Im getting the error Cannot resolve symbol 'activity_profile'on activity_profile and activity_goals while trying to make a side navigation bar button clicks move between activities. </p>