如何解决片段底部导航栏可点击一次选择项
当我再次单击任何项目时,每次都会重新加载相同的片段视图。但我想做一次可点击的底部导航栏项目。我该怎么做?
这是 MainActivity.java 代码
navigationMenu=findViewById(R.id.navigation);
navigationMenu.setonNavigationItemSelectedListener(navListener);
//navigationMenu.getMenu().getItem(2).setIcon(R.drawable.arrow_down);
//I added this if statement to keep the selected fragment when rotating the device
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,new UserHomeFragment()).commit();
}
这是点击监听器代码
private BottomNavigationView.OnNavigationItemSelectedListener navListener =
new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment selectedFragment = null;
switch (item.getItemId()) {
case R.id.navigation_home:
selectedFragment = new UserHomeFragment();
break;
case R.id.navigation_works:
selectedFragment = new UserWorksFragment();
break;
case R.id.navigation_completed_works:
selectedFragment = new UserCompletedFragment();
break;
case R.id.navigation_profile:
selectedFragment = new UserAccountFragment();
break;
}
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,selectedFragment).commit();
return true;
}
};
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。