尝试从底部导航栏更改片段时出现错误

时间:2019-10-28 09:31:24

标签: java android android-studio android-fragments bottomnavigationview

key 123 items   ['word1', 'word2', 'word3']
key 456 items   ['word4']

下面是activity_home的代码

public class home_fragment extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    private AppBarConfiguration mAppBarConfiguration;
    private DrawerLayout drawer;
    private ImageView profilepic;
    private DatabaseReference mDatabaseRef;
    private FirebaseAuth mAuth;
    private StorageReference storageReference;
    FirebaseUser firebaseUser;

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            switch (item.getItemId()) {
                case R.id.navi_home:
                    getSupportFragmentManager().beginTransaction().replace(R.id.nav_host_fragment,new com.example.docsapp.HomeFragment()).commit();
                    break;
                case R.id.navi_favourites:
                    getSupportFragmentManager().beginTransaction().replace(R.id.nav_host_fragment,new FavouriteFragment()).commit();
                    break;
                case R.id.navi_search:
                    getSupportFragmentManager().beginTransaction().replace(R.id.nav_host_fragment,new SearchFragment()).commit();
                    break;
            }
            return true;
        }

    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        mAuth=FirebaseAuth.getInstance();
        firebaseUser = mAuth.getCurrentUser();

        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this,drawer,toolbar,R.string.navigation_drawer_open,R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();


        try {
            BottomNavigationView navigation =  findViewById(R.id.nav_view);
            navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
        }catch (Exception e){
            FancyToast.makeText(getApplicationContext(),e.getMessage(),FancyToast.LENGTH_LONG,FancyToast.ERROR,true).show();
        }


        if (savedInstanceState==null){
            getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,new HomeFragment()).commit();
            try {
                getSupportFragmentManager().beginTransaction().replace(R.id.nav_host_fragment,new com.example.docsapp.HomeFragment()).commit();
            }catch (Exception e){
                FancyToast.makeText(getApplicationContext(),e.getMessage(),FancyToast.LENGTH_LONG,FancyToast.ERROR,true).show();
            }

        }

        UpdateNavHeader();

    }

下面是home_fragment的代码

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout 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/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">



    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <androidx.appcompat.widget.Toolbar
            android:layout_width="match_parent"
            android:layout_height="?android:actionBarSize"
            android:background="@color/colorPrimary"
            android:id="@+id/toolbar"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            android:elevation="4dp"/>
        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/fragment_container"/>

    </LinearLayout>

    <com.google.android.material.navigation.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_home"
        app:menu="@menu/drawer_menu" />

</androidx.drawerlayout.widget.DrawerLayout>

我正在尝试从一个片段中打开一个片段。试图打开的片段显示错误.home片段由导航抽屉和底部导航组成。
我正在尝试从一个片段中打开一个片段。我试图打开的片段显示错误.home片段包含一个导航抽屉以及底部导航。

在显示运行时间here时显示错误。

0 个答案:

没有答案