问题描述
目前,我使用的是 Android 的 Navigation 组件,并且操作栏标题显示在左侧。但是,我有点希望它集中起来使事情更整洁,有什么办法可以这样做吗?
Image of the actionbar title that is displayed on the left
活动代码:
public class General extends AppCompatActivity {
private BottomNavigationView bottomNavigationView;
private NavController navController;
private AppBarConfiguration appBarConfiguration;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.general);
bottomNavigationView = findViewById(R.id.bottomNavigationView);
navController = Navigation.findNavController(this,R.id.fragment);
appBarConfiguration = new AppBarConfiguration.Builder(R.id.addFragment,R.id.homeFragment).build();
NavigationUI.setupWithNavController(bottomNavigationView,navController);
NavigationUI.setupActionBarWithNavController(this,navController,appBarConfiguration);
}
}
活动的 XML 代码
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".General">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="@menu/bottom_navigation_menu">
</com.google.android.material.bottomnavigation.BottomNavigationView>
<fragment
android:id="@+id/fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="@navigation/the_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>
片段 XML 代码:
<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/the_navigation"
app:startDestination="@id/homeFragment">
<fragment
android:id="@+id/homeFragment"
android:name="com.test.HomeFragment"
android:label="Home"
tools:layout="@layout/home_fragment" />
<fragment
android:id="@+id/addFragment"
android:name="com.test.AddFragment"
android:label="Add"
tools:layout="@layout/add_fragment" />
</navigation>
解决方法
经过一番搜索后,似乎 this 成功了。我所要做的就是将其添加到我的活动代码中。