DrawerLayout中的FrameLayout

<androidx.drawerlayout.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <!-- 主内容 -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
    
    <!-- 抽屉内容 -->
    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"/>
</androidx.drawerlayout.widget.DrawerLayout>

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <!-- 主内容 -->
    <TextView.../>
    
    <!-- 叠加层 -->
    <View
        android:id="@+id/overlay"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#80000000"
        android:visibility="gone"/>
</FrameLayout>

<FrameLayout...>
    <View
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"/>
</FrameLayout>

FrameLayout container = findViewById(R.id.content_frame);
container.removeAllViews();
View newView = getLayoutInflater().inflate(R.layout.new_view, container, false);
container.addView(newView);

drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
    @Override
    public void onDrawerSlide(View drawerView, float slideOffset) {
        View overlay = findViewById(R.id.overlay);
        overlay.setVisibility(View.VISIBLE);
        overlay.setAlpha(slideOffset * 0.5f);
    }
    
    @Override
    public void onDrawerClosed(View drawerView) {
        findViewById(R.id.overlay).setVisibility(View.GONE);
    }
    //...其他回调方法
});