與底杆開關片段（顯示/隱藏）的Android

Question

我有執行片段和我的應用底杆問題..

我灣切換根據片段初始化底杆.. 此我的代碼

private Fragment frag_summary = new SummaryFragment(); 
    private Fragment frag_my_proposal = new MyProposalFragment(); 
    private Fragment frag_proposal = new ProposalFragment(); 
    private Fragment frag_friends = new FriendsFragment(); 

bottomNavigation.setOnTabSelectListener(new OnTabSelectListener() { 
      @Override 
      public void onTabSelected(@IdRes int tabId) { 
       setSelectedFragment(tabId); 
      } 
     }); 


    public void setSelectedFragment(int id) { 
     switch (id) { 
      case R.id.menu_home: 
       setFragment(id, frag_summary); 
       break; 
      case R.id.menu_my_proposals: 
       setFragment(id, new MyProposalFragment()); 
       break; 
      case R.id.menu_proposal: 
       setFragment(id, new ProposalFragment()); 
       break; 
      case R.id.menu_friends: 
       setFragment(id, new FriendsFragment()); 
       break; 
      case R.id.menu_more: 
       /* drawer.openDrawer(GravityCompat.START); 
       if (drawer.isDrawerOpen(GravityCompat.START)) { 
        drawer.closeDrawer(GravityCompat.START); 
       } else { 
        drawer.openDrawer(GravityCompat.START); 
       }*/ 
       break; 
      default: 
       setFragment(id, frag_summary); 
       break; 

     } 
    } 

    private void setFragment(int id, Fragment fragments) { 

     FragmentManager fragmentManager = getSupportFragmentManager(); 
     FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 
     String fragmentTag = String.valueOf(id); 

     if (frag_summary.isAdded()) { 
      fragmentTransaction.hide(frag_summary); 
     } 
     if (frag_my_proposal.isAdded()) { 
      fragmentTransaction.hide(frag_my_proposal); 
     } 
     if (frag_proposal.isAdded()) { 
      fragmentTransaction.hide(frag_proposal); 
     } 
     if (frag_friends.isAdded()) { 
      fragmentTransaction.hide(frag_friends); 
     } 
     if (fragments.isAdded()) { 
      fragmentTransaction.show(fragments); 
     } else { 
      fragmentTransaction.add(R.id.content_frame, fragments, fragmentTag); 
     } 

     fragmentTransaction.commitAllowingStateLoss(); 


    } 

問題是：當我從片段frag_summary選擇片段frag_friends時，片段frag_summary和其他片段有時仍然顯示..像其他活動ex：從片段frag_friends到片段frag_proposal。

sho如何解決它？ 對不起我的英語

Answer 1

Repalce中setFragment代碼 -

FragmentManager fragmentManager = getSupportFragmentManager(); 
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 
fragmentTransaction.replace(R.id.content_frame, fragments, fragmentTag); 
fragmentTransaction.commitAllowingStateLoss(); 

基本上要更換當前visivble片段。

編輯：變化下面的代碼 -

public void setSelectedFragment(int id) { 
     switch (id) { 
      case R.id.menu_home: 
       setFragment(id, frag_summary); 
       break; 
      case R.id.menu_my_proposals: 
       setFragment(id, /*send the class instance you created for this fragment */); 
       break; 
      case R.id.menu_proposal: 
       setFragment(id, /*send the class instance you created for this fragment */); 
       break; 
      case R.id.menu_friends: 
       setFragment(id, /*send the class instance you created for this fragment */); 
       break; 
      case R.id.menu_more: 
       /* drawer.openDrawer(GravityCompat.START); 
       if (drawer.isDrawerOpen(GravityCompat.START)) { 
        drawer.closeDrawer(GravityCompat.START); 
       } else { 
        drawer.openDrawer(GravityCompat.START); 
       }*/ 
       break; 
      default: 
       setFragment(id, frag_summary); 
       break; 

     } 
    }