我正在使用一个BottomNavigationView,其中包含5个项目,4个片段和1个活动,如下图所示
单击任何片段时,我希望它正常运行,得到clicked
和checked
,但是单击“ +”项时,我正在打开一个活动,但我不希望它是checked
,所以我希望它是clickable
,以便它可以打开活动,但我不想是checked
,因为当用户从活动中返回时,会看到即使选择了错误的项目,它也会被选中。
我该怎么办?
这是我的代码:
bottomNavigationView = findViewById(R.id.bottom_nav_view);
bottomNavigationView.setOnNavigationItemSelectedListener(this);
。
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
int id = menuItem.getItemId();
Fragment fragment = null;
switch (id) {
case R.id.home_nav_menu:
fragment = new HomeFragment();
break;
case R.id.inbox_nav_menu:
fragment = new InboxFragment();
break;
case R.id.add_nav_menu:
Intent intent = new Intent(this, AddActivity.class);
startActivity(intent);
return true;
case R.id.history_nav_menu:
fragment = new HistoryFragment();
break;
case R.id.profile_nav_menu:
fragment = new ProfileFragment();
break;
}
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_place_holder, fragment).commit();
return true;
}
答案 0 :(得分:2)
请参阅侦听器的源代码以进行底部导航,当您不想显示所选内容时,只需返回false。
/**
* Listener for handling selection events on bottom navigation items.
*/
public interface OnNavigationItemSelectedListener {
/**
* Called when an item in the bottom navigation menu is selected.
*
* @param item The selected item
*
* @return true to display the item as the selected item and false if the item should not
* be selected. Consider setting non-selectable items as disabled preemptively to
* make them appear non-interactive.
*/
boolean onNavigationItemSelected(@NonNull MenuItem item);
}
因此,您只需在case R.id.add_nav_menu:
中返回false即可。
答案 1 :(得分:0)
用户MenuItem#setCheckable(boolean)
API才能播放菜单项的可检查状态。
MenuItem menuItem = navigation.getMenu().getItem(1);
menuItem.setCheckable(false);
答案 2 :(得分:0)
尝试这样:
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
int id = menuItem.getItemId();
Fragment fragment = null;
switch (id) {
case R.id.home_nav_menu:
fragment = new HomeFragment();
break;
case R.id.inbox_nav_menu:
fragment = new InboxFragment();
break;
case R.id.add_nav_menu:
menuItem.setCheckable(false);
Intent intent = new Intent(this, AddActivity.class);
startActivity(intent);
return true;
case R.id.history_nav_menu:
fragment = new HistoryFragment();
break;
case R.id.profile_nav_menu:
fragment = new ProfileFragment();
break;
}
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_place_holder, fragment).commit();
return true;
}