Question

我正在尝试在协调器布局中对齐元素。代码如下：

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

        <LinearLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            app:layout_anchorGravity="top"
            android:layout_height="256dp"
            android:fitsSystemWindows="true"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            android:background="@color/colorPrimary">

            <LinearLayout
                android:id="@+id/collapsing_toolbar"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:orientation="vertical">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="@string/cheese_ipsum" />

                <RelativeLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content">

                    <Button
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="HAHAHA" />
                </RelativeLayout>

            </LinearLayout>

        </LinearLayout>


    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_anchorGravity="bottom|center"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:paddingTop="24dp">

            <LinearLayout
                style="@style/Widget.CardContent"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Info"
                    android:textAppearance="@style/TextAppearance.AppCompat.Title" />

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="@string/cheese_ipsum" />

            </LinearLayout>


            <LinearLayout
                style="@style/Widget.CardContent"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Friends"
                    android:textAppearance="@style/TextAppearance.AppCompat.Title" />

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="@string/cheese_ipsum" />

            </LinearLayout>


            <LinearLayout
                style="@style/Widget.CardContent"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Related"
                    android:textAppearance="@style/TextAppearance.AppCompat.Title" />

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="@string/cheese_ipsum" />

            </LinearLayout>

        </LinearLayout>

    </android.support.v4.widget.NestedScrollView>

    <android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        android:clickable="true"
        android:src="@drawable/ic_discuss"
        app:layout_anchor="@id/appbar"
        app:layout_anchorGravity="bottom|right|end" />

</android.support.design.widget.CoordinatorLayout>

在实施上述代码时，我得到了：

但我希望布局能够正确对齐，例如：

当我将第一个linear layout括在AppBarLayout中时会发生这种情况。这不是正确的方法。对齐coordinator layout中的元素的正确方法是什么？

Answer 1

更新了我的答案，请查看

<android.support.design.widget.CoordinatorLayout        
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">


    <LinearLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        app:layout_anchorGravity="top"
        android:layout_height="256dp"
        android:fitsSystemWindows="true"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        android:background="@color/colorPrimary">

        <LinearLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            android:orientation="vertical">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/cheese_ipsum" />

            <RelativeLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <Button
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="HAHAHA" />
            </RelativeLayout>

        </LinearLayout>

    </LinearLayout>

</android.support.design.widget.AppBarLayout>



<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_anchorGravity="bottom|center"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingTop="24dp">

        <LinearLayout
            style="@style/Widget.CardContent"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Info"
                android:textAppearance="@style/TextAppearance.AppCompat.Title" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/cheese_ipsum" />

        </LinearLayout>


        <LinearLayout
            style="@style/Widget.CardContent"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Friends"
                android:textAppearance="@style/TextAppearance.AppCompat.Title" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/cheese_ipsum" />

        </LinearLayout>


        <LinearLayout
            style="@style/Widget.CardContent"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Related"
                android:textAppearance="@style/TextAppearance.AppCompat.Title" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/cheese_ipsum" />

        </LinearLayout>

    </LinearLayout>

</android.support.v4.widget.NestedScrollView>

<android.support.design.widget.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/fab_margin"
    android:clickable="true"
    android:src="@drawable/ic_book"
    app:layout_anchor="@id/appbar"
    app:layout_anchorGravity="bottom|right|end" />

</android.support.design.widget.CoordinatorLayout>

Answer 2

将应用栏中的观点纳入android.support.design.widget.AppBarLayout

<android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        app:layout_anchorGravity="top"
        android:layout_height="256dp"
        android:fitsSystemWindows="true"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        android:background="@color/colorPrimary">

        <LinearLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            android:orientation="vertical">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/cheese_ipsum" />

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="HAHAHA" />

        </LinearLayout>

</android.support.design.widget.AppBarLayout>

使用AppBarLayout是正确的方法。请参阅CheeseSquare的源代码（由Google维护以展示正确使用Material Design支持库的应用程序），以了解有关AppBarLayout及其用途的更多信息。

在布局中正确对齐元素

2 个答案: