我的工具栏后面这个奇怪的白色矩形是什么？

Question

我整天都在尝试摆脱它，但无济于事。尝试为它周围的每个视图和布局提供不可见的背景颜色。还尝试减小其所在布局和视图的大小。那些尖锐的白色边缘仍然存在。这些是什么？另外，您好，这是文本填充器，网站上说代码太多，文本太少。 “嗨文本填充器，你好吗？”

activity_main.xml:

<?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=".MainActivity">
<include
    android:id="@+id/mainToolbar"
    layout="@layout/toolbar"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<androidx.coordinatorlayout.widget.CoordinatorLayout
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/mainToolbar">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/tab_anim_appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center|top"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:background="#00FFFFFF">

        <com.google.android.material.appbar.MaterialToolbar
            android:id="@+id/searchToolbar"
            style="@style/Widget.MaterialComponents.Toolbar.Primary"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center|top"
            android:background="#A106A1"
            android:elevation="2dp"
            app:contentInsetLeft="0dp"
            app:contentInsetStart="0dp"
            app:layout_scrollFlags="scroll|enterAlways">

            <!-- dummy to catch focus -->
            <LinearLayout
                android:layout_width="0px"
                android:layout_height="0px"
                android:focusable="true"
                android:focusableInTouchMode="true" />

            <androidx.appcompat.widget.SearchView
                android:id="@+id/searchView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:animateLayoutChanges="true"
                android:layoutDirection="rtl"
                app:iconifiedByDefault="true"
                android:layout_marginLeft="30dp"
                android:layout_marginRight="30dp"/>

        </com.google.android.material.appbar.MaterialToolbar>

    </com.google.android.material.appbar.AppBarLayout>

    <include layout="@layout/content_scrolling"/>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

代码中的工具栏：

    //code to make the toolbar edges round
    MaterialToolbar searchToolbar = findViewById(R.id.searchToolbar);
    MaterialShapeDrawable searchbarBackground = (MaterialShapeDrawable) searchToolbar.getBackground();
    searchbarBackground.setShapeAppearanceModel(
            searchbarBackground.getShapeAppearanceModel()
                    .toBuilder()
                    .setBottomRightCorner(CornerFamily.ROUNDED,100)
                    .setBottomLeftCorner(CornerFamily.ROUNDED,100)
                    .build()
    );

    //code to add search function
    SearchView searchView = findViewById(R.id.searchView);
    searchView.setImeOptions(EditorInfo.IME_ACTION_DONE);//so that button on keyboard is a check
    searchView.setQueryHint("Search...");
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            ItemAdapter.getFilter().filter(newText);
            return false;
        }
    });

Answer 1

是AppBarLayout的影子。使用：

<com.google.android.material.appbar.AppBarLayout
    app:elevation="0dp"
    android:background="@android:color/transparent"

我的工具栏后面这个奇怪的白色矩形是什么？

What's this strange white rectangle behind my toolbar?

java

android

android-layout

android-toolbar

material-components