[英]How can i dynamically change bottom navigation items text?
我試圖實現上述設計。 我可以更改圖標,但無法更改底部文本。 我正在使用材料底部導航欄
我通過為每個圖標實現單獨的選擇器可繪制來實現圖標更改。 有什么辦法可以對導航標題做同樣的事情嗎?
主Activity.class
public class MainActivity extends AppCompatActivity {
BottomNavigationView navView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
navView = findViewById(R.id.nav_view);
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
R.id.navigation_home, R.id.navigation_saved, R.id.navigation_applied, R.id.navigation_profile, R.id.navigation_more)
.build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
NavigationUI.setupWithNavController(navView, navController);
}
活動_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="?attr/actionBarSize">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/nav_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
app:itemIconTint="@null"
app:itemHorizontalTranslationEnabled="false"
android:background="?android:attr/windowBackground"
app:layout_constraintBottom_toBottomOf="parent"
app:labelVisibilityMode="labeled"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="@menu/bottom_nav_menu" />
<fragment
android:id="@+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="@id/nav_view"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="@navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>
bottom_nav_menu.xml
<item
android:id="@+id/navigation_home"
android:icon="@drawable/home_selector"
android:title="@string/title_home" />
<item
android:id="@+id/navigation_saved"
android:icon="@drawable/saved_jobs_selector"
android:title="@string/title_saved" />
<item
android:id="@+id/navigation_applied"
android:icon="@drawable/applied_jobs_selector"
android:title="@string/title_applied" />
<item
android:id="@+id/navigation_profile"
android:icon="@drawable/profile_selector"
android:title="@string/title_profile" />
<item
android:id="@+id/navigation_more"
android:icon="@drawable/more_selector"
android:title="@string/title_More" />
</menu>
嗨,我可以通過執行以下操作來更改導航欄中的標題:
private BottomNavigationView.OnNavigationItemSelectedListener navListener = new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item)
{
switch (item.getItemId())
{
}
}
};
在 switch 之后,您添加基於項目 id 的字符串
你可以這樣改變:
for(i in 0 until bottomNavigation.maxItemCount){
bottomNavigation.menu[i].title = "My Custom Title"
}
我像這樣以編程方式更改標題和圖標:
fun changeMenuItemTextAndIcon(){
val item: MenuItem = bottom_navigation.menu.findItem(R.id.action_scan)
item.title = getString(R.string.label_scan_item)
item.icon = ContextCompat.getDrawable(activity, R.drawable.ic_barcode)
}
檢查代碼行下方,並在您在 Kotlin 中選擇 BottomNavigation 項時添加它(將 java 轉換為 kotlin )。
navView.getCheckedItem().setTitle(".");
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.