Fragment与子项菜单+FrameLayout实现点击布局效

1·步骤

       
       //获得fragment管理器
       fragmentManager = getSupportFragmentManager();

       //初始化fragment
       initFragment();

private void initFragment() {
       fragments = new ArrayList<>();
       fragments.add(new ZhihuFragment());
       fragments.add(new WeCatFragment());
       fragments.add(new GankFragment());
       fragments.add(new GoldFragment());
       fragments.add(new VetxFragment());
       fragments.add(new LikeFragment());
       fragments.add(new SettingFragment());
       fragments.add(new AboutFragment());

   }

       //先显示初始碎片
       addZhiFragment();


     private void addZhiFragment() {
       FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
       fragmentTransaction.add(R.id.fl_main, fragments.get(0));
       fragmentTransaction.commit();
   }



   private void switchFragment(int type) {
       FragmentTransaction transaction = fragmentManager.beginTransaction();
       Fragment fragment = fragments.get(type);
       //fragment是否添加过
       if (!fragment.isAdded()) {
           transaction.add(R.id.fl_main, fragment);
       }
       //隐藏上一个碎片
       Fragment lastFragment = fragments.get(lastFragmentType);
       transaction.hide(lastFragment);
       //显示新的Fragment
       transaction.show(fragment);
       lastFragmentType = type;
       if (lastFragmentType == FragmentType.TYPE_WECHAT || lastFragmentType == FragmentType.TYPE_GANK) {
           item.setVisible(true);
       } else {
           item.setVisible(false);
       }
       transaction.commit();

   }

navi.setNavigationItemSelectedListener方法里

switch (id) {
                    case R.id.zhihu:
                        toolbar.setTitle(R.string.zhihu);
                        //调用fragment
                        switchFragment(0);
                        toast = Toast.makeText(getApplicationContext(), "123", Toast.LENGTH_SHORT);
                        toast.setGravity(Gravity.CENTER, -20, -1010);
                        imageView = new ImageView(MainActivity.this);
                        imageView.setImageResource(R.mipmap.ic_drawer_zhihu);
                        toast.setView(imageView);
                        toast.show();
                        break;
 }