title: I can't bring up a blank activity once i'm in a navigation bar activity
body: <p>I started an application and I want to bring up a new activity in order to make a form for the database. However, I can't seem to switch from the activity that has a navigation bar, to an empty activity. When I run it and press the "Add a new parachute" button the app crashes.</p>
  
  <p>I have already made the switch from my launching activity which is an empty activity with two buttons, to the activity with the menu. So, I know to add it to the manifest and I even copied the code and modified the names of the class and layout.</p>
  
  <p>public class MainMenu extends AppCompatActivity
  {
      TextView textView;</p>
  
  <pre><code>private TextView mTextMessage;
  DatabaseHelper mDatabaseHelper;
  private Button btnAdd, btnViewData;
  private EditText editText;
  
  private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
          = new BottomNavigationView.OnNavigationItemSelectedListener() {
  
      @Override
      public boolean onNavigationItemSelected(@NonNull MenuItem item) {
          switch (item.getItemId()) {
              case R.id.navigation_chutes:
              { mTextMessage.setText(R.string.title_parachutes);
                  return true;}
              case R.id.navigation_jump:
              {mTextMessage.setText(R.string.title_jump);
                  return true;}
              case R.id.navigation_settings:
              {mTextMessage.setText(R.string.title_settings);
                  return true;}
          }
          return false;
      }
  };
  
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main_menu);
      mTextMessage = (TextView) findViewById(R.id.message);
      BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
      navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
      textView = (TextView) findViewById(R.id.text);
  }
  public void greenDay(View v) {
      startActivity(new Intent(getBaseContext(), NewForm.class));
  }
  </code></pre>
  
  <p>}</p>