其他片段没有显示

Question

我一直在寻找显示fragments，但问题仍然存在，我无法得到它的工作。

我的问题是，当我添加repeat_entry菜单显示另一个片段，该片段没有显示，但当我点击action_settings该片段显示。

@Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     FragmentManager fm = getFragmentManager(); 
     FragmentTransaction ft = fm.beginTransaction(); 
     ft.setCustomAnimations(android.R.animator.fade_in,android.R.animator.fade_out); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      selectTabToShow(String.valueOf(R.id.action_search)); 
      CategorySettings fragemnt = (CategorySettings) getFragmentManager().findFragmentById(R.id.categorySettings); 
      fragemnt.refresCategoryList(); 
      Fragment fragment = new CategorySettings(); 
      ft.add(R.id.category_cont,fragment,"asdf"); 
      ft.commit(); 
      return true; 
     }else if(id == R.id.repeat_entry){ 

      Toast.makeText(MainActivity.this,"ssdf sdf",Toast.LENGTH_SHORT).show(); 
      Fragment fragment = new RepeatEntry(); 
      ft.add(R.id.category_cont,fragment,"repeat tag"); 
      ft.commit(); 
      Toast.makeText(MainActivity.this,"ssdf sdf",Toast.LENGTH_SHORT).show(); 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

截至目前，这是我RepeatEntry片段

public class RepeatEntry extends Fragment{ 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState){ 
     View v = inflater.inflate(R.layout.repeat_entry,container,false); 

     return v; 
    } 
} 

请帮我家伙，我是新来的这一点。

Answer 1

尝试更换

ft.replace(R.id.category_cont,fragment,"repeat tag");