[英]Android – setText to Tabs in a switch case Statement
My app contains a bottomNavigationView and a TabLayout in the activity_main.xml. 我的应用程序在activity_main.xml中包含bottomNavigationView和TabLayout。 The selected Navigation Fragment is chosen with a switch-case and the tabs are named programmatically like this:
所选的导航片段是通过开关盒选择的,并且选项卡的命名方式如下:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.addTab(tabLayout.newTab().setText("A"));
tabLayout.addTab(tabLayout.newTab().setText("B"));
tabLayout.addTab(tabLayout.newTab().setText("C"));
BottomNavigationView bottomNavigationView = (BottomNavigationView)
findViewById(R.id.navigation);
bottomNavigationView.setOnNavigationItemSelectedListener
(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment selectedFragment = null;
switch (item.getItemId()) {
case R.id.navigation_national:
selectedFragment = ItemOneFragment.newInstance();
break;
case R.id.navigation_international:
selectedFragment = ItemTwoFragment.newInstance();
break;
case R.id.navigation_blackboard:
selectedFragment = ItemThreeFragment.newInstance();
break;
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, selectedFragment);
transaction.commit();
return true;
}
});
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, ItemOneFragment.newInstance());
transaction.commit();
}
}
Now I want to change the tab names depending to the selected bottomNavigation option. 现在,我想根据所选的bottomNavigation选项更改选项卡名称。 Why can't I just add the addText("");
为什么我不能只添加addText(“”); statements to the different cases?
对不同情况的陈述?
tabLayout.getTabAt(item.getItemId()).setText("Ds");
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