[英]How to not navigate back to certain fragments using a bottom navigation bar in Android
[英]Android Java Bottom navigation bar not visible when using fragments
我正在嘗試實現底部導航視圖。 導航欄在不使用片段的情況下完美顯示,但在實現片段后它不再可見。 然而,導航欄仍然是可點擊的,而且似乎片段正在渲染它。 我不確定我錯過了什么。
主程序
package com.example.rentalz.User;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import android.os.Bundle;
import com.example.rentalz.R;
import com.ismaeldivita.chipnavigation.ChipNavigationBar;
public class Main extends AppCompatActivity {
ChipNavigationBar chipNavigationBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
chipNavigationBar = findViewById(R.id.bottom_nav_menu);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new HomeFragment()).commit();
bottomMenu();
}
private void bottomMenu() {
chipNavigationBar.setOnItemSelectedListener(new ChipNavigationBar.OnItemSelectedListener() {
@Override
public void onItemSelected(int i) {
Fragment fragment = null;
switch (i) {
case R.id.home:
fragment = new HomeFragment();
break;
case R.id.search:
fragment = new SearchFragment();
break;
case R.id.favourites:
fragment = new FavouritesFragment();
break;
case R.id.profile:
fragment = new ProfileFragment();
break;
}
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, fragment).commit();
}
});
}
}
活動_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".User.Main"
android:background="#eeeeee"
android:id="@+id/fragment_container">
<com.ismaeldivita.chipnavigation.ChipNavigationBar
android:id="@+id/bottom_nav_menu"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:background="@color/white"
app:cnb_unselectedColor="@color/black"
app:cnb_radius="8dp"
app:cnb_menuResource="@menu/bottom_navigation_menu"/>
</RelativeLayout>
fragment_home.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".User.HomeFragment"
android:background="#3498db">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="Home Fragment" />
主頁片段.xml
package com.example.rentalz.User;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.rentalz.R;
public class HomeFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_home, container, false);
}
v}
只需將片段與導航分開,它們就不會重疊
活動_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
android:background="#eeeeee">
<FrameLayout
android:layout_width="match_parent"
android:id="@+id/fragment_container"
android:layout_above="@+id/bottom_nav_menu"
android:layout_height="match_parent"/>
<com.ismaeldivita.chipnavigation.ChipNavigationBar
android:id="@+id/bottom_nav_menu"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:background="@color/white"
app:cnb_unselectedColor="@color/black"
app:cnb_radius="8dp"
app:cnb_menuResource="@menu/bottom_navigation_menu"/>
</RelativeLayout>
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