Java android使用可用片段_Java_Android

Java android使用可用片段

java android

Java android使用可用片段,java,android,Java,Android,请看一下我的代码： DashboardActivity.java drawer = findViewById(R.id.drawer_layout); navigationView = findViewById(R.id.nav_view); View hview = navigationView.getHeaderView(0); // Passing each menu ID as a set of Ids because each // menu sh

请看一下我的代码：

DashboardActivity.java

  drawer = findViewById(R.id.drawer_layout);
    navigationView = findViewById(R.id.nav_view);
    View hview = navigationView.getHeaderView(0);

    // Passing each menu ID as a set of Ids because each
    // menu should be considered as top level destinations.
    mAppBarConfiguration = new AppBarConfiguration.Builder(
            R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow)
            .setOpenableLayout(drawer)
            .build();
    NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
    NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
    NavigationUI.setupWithNavController(navigationView, navController); 

@Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        root = inflater.inflate(R.layout.fragment_video, container, false);

        frg = root.findViewById(R.id.test_fragment);
        frg.setOnClickListener(this);
        return root;
    }

@Override
    public void onClick(View v)
    {
        GalleryFragment nextFrag= new GalleryFragment();
        getActivity().getSupportFragmentManager().beginTransaction()
                .replace(R.id.nav_host_fragment, nextFrag)
                .addToBackStack(null)
                .commit();
    }

此代码通常可用于打开抽屉

但当我添加一些逻辑框架时，结果很糟糕，下面是我的屏幕截图：

图像1

当我点击它时，可能会出现如下打开片段：

图像2

但当我使用动态片段（FragmentManager）从片段中打开它时，如下所示：

图像3

结果如下：

图像4

这些是我的代码：

MyFragment.java

  drawer = findViewById(R.id.drawer_layout);
    navigationView = findViewById(R.id.nav_view);
    View hview = navigationView.getHeaderView(0);

    // Passing each menu ID as a set of Ids because each
    // menu should be considered as top level destinations.
    mAppBarConfiguration = new AppBarConfiguration.Builder(
            R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow)
            .setOpenableLayout(drawer)
            .build();
    NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
    NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
    NavigationUI.setupWithNavController(navigationView, navController); 

@Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        root = inflater.inflate(R.layout.fragment_video, container, false);

        frg = root.findViewById(R.id.test_fragment);
        frg.setOnClickListener(this);
        return root;
    }

@Override
    public void onClick(View v)
    {
        GalleryFragment nextFrag= new GalleryFragment();
        getActivity().getSupportFragmentManager().beginTransaction()
                .replace(R.id.nav_host_fragment, nextFrag)
                .addToBackStack(null)
                .commit();
    }

MyFragment.xml

<LinearLayout 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"
    android:orientation="vertical"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:id="@+id/video_fragment"
    tools:context=".VideoFragment">

    <Button
        android:id="@+id/test_fragment"
        android:text="Open new fragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>

<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">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <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:itemTextColor="@color/drawer_item"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</androidx.drawerlayout.widget.DrawerLayout>

<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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/app_bar_main">

<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_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:navGraph="@navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">

<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_home"
        android:title="Home" />
    <item
        android:id="@+id/nav_gallery"
        android:title="Tutorial" />
    <item
        android:id="@+id/nav_slideshow"
        android:title="Your History" />
</group>

<item android:title="Upgrade Membership">
    <menu>
        <item
            android:id="@+id/buy_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Buy Coins" />
        <item
            android:id="@+id/free_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Free Coins" />
        <item
            android:id="@+id/ex_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Exchange Coins" />
    </menu>
</item>

ActivityDrawer.xml

<LinearLayout 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"
    android:orientation="vertical"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:id="@+id/video_fragment"
    tools:context=".VideoFragment">

    <Button
        android:id="@+id/test_fragment"
        android:text="Open new fragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>

<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">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <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:itemTextColor="@color/drawer_item"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</androidx.drawerlayout.widget.DrawerLayout>

<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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/app_bar_main">

<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_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:navGraph="@navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">

<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_home"
        android:title="Home" />
    <item
        android:id="@+id/nav_gallery"
        android:title="Tutorial" />
    <item
        android:id="@+id/nav_slideshow"
        android:title="Your History" />
</group>

<item android:title="Upgrade Membership">
    <menu>
        <item
            android:id="@+id/buy_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Buy Coins" />
        <item
            android:id="@+id/free_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Free Coins" />
        <item
            android:id="@+id/ex_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Exchange Coins" />
    </menu>
</item>

content.xml

<LinearLayout 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"
    android:orientation="vertical"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:id="@+id/video_fragment"
    tools:context=".VideoFragment">

    <Button
        android:id="@+id/test_fragment"
        android:text="Open new fragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>

<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">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <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:itemTextColor="@color/drawer_item"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</androidx.drawerlayout.widget.DrawerLayout>

<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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/app_bar_main">

<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_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:navGraph="@navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">

<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_home"
        android:title="Home" />
    <item
        android:id="@+id/nav_gallery"
        android:title="Tutorial" />
    <item
        android:id="@+id/nav_slideshow"
        android:title="Your History" />
</group>

<item android:title="Upgrade Membership">
    <menu>
        <item
            android:id="@+id/buy_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Buy Coins" />
        <item
            android:id="@+id/free_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Free Coins" />
        <item
            android:id="@+id/ex_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Exchange Coins" />
    </menu>
</item>

活动\u main\u drawer.xml

<LinearLayout 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"
    android:orientation="vertical"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:id="@+id/video_fragment"
    tools:context=".VideoFragment">

    <Button
        android:id="@+id/test_fragment"
        android:text="Open new fragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>

<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">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <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:itemTextColor="@color/drawer_item"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</androidx.drawerlayout.widget.DrawerLayout>

<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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/app_bar_main">

<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_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:navGraph="@navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">

<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_home"
        android:title="Home" />
    <item
        android:id="@+id/nav_gallery"
        android:title="Tutorial" />
    <item
        android:id="@+id/nav_slideshow"
        android:title="Your History" />
</group>

<item android:title="Upgrade Membership">
    <menu>
        <item
            android:id="@+id/buy_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Buy Coins" />
        <item
            android:id="@+id/free_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Free Coins" />
        <item
            android:id="@+id/ex_coins"
            android:icon="@drawable/ic_coin_nav"
            android:title="Exchange Coins" />
    </menu>
</item>

E:如何建立逻辑，以便用户单击“打开新片段”（图像3）时，结果类似于图像2

请帮忙

谢谢