使用“约束布局”中心垂直多视图

时间:2017-07-26 12:20:26

标签: android android-layout android-constraintlayout constraint-layout-chains

我正在尝试使用ConstraintLayout来替换具有相对和线性布局的常规布局,但是我有一些麻烦要在cardview中垂直居中两个视图。

下面的布局文件是我想要替换的当前布局。

enter image description here

    <?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginEnd="@dimen/main_button_side_margin"
    android:layout_marginStart="@dimen/main_button_side_margin"
    android:layout_marginTop="@dimen/main_button_top_margin"
    android:paddingBottom="2dp"
    android:paddingLeft="1dp"
    android:paddingRight="1dp"
    android:paddingTop="2dp">

    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
        android:id="@+id/select_language_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:foreground="?android:attr/selectableItemBackground"
        card_view:cardBackgroundColor="@android:color/transparent"
        card_view:cardCornerRadius="0dp"
        card_view:cardElevation="0dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/language_stroke"
            android:minHeight="80dp">

            <ImageView
                android:id="@+id/img_language"
                android:layout_width="@dimen/main_button_size"
                android:layout_height="@dimen/main_button_size"
                android:layout_centerVertical="true"
                android:layout_marginLeft="@dimen/main_button_icon_margin"
                android:layout_marginStart="@dimen/main_button_icon_margin"
                android:src="@drawable/ic_language_white_48dp"
                android:tint="@color/language_color" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginEnd="@dimen/menu_text_margin"
                android:layout_marginLeft="@dimen/menu_text_margin"
                android:layout_marginRight="@dimen/menu_text_margin"
                android:layout_marginStart="@dimen/menu_text_margin"
                android:layout_toEndOf="@id/img_language"
                android:layout_centerVertical="true"
                android:orientation="vertical">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="@dimen/main_button_text_title_margin"
                    android:text="Text" />

                <TextView
                    android:fontFamily="sec-roboto-light"
                    android:gravity="start"
                    android:id="@+id/language_desc"
                    android:text="description"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" />
            </LinearLayout>
        </RelativeLayout>
    </android.support.v7.widget.CardView>
</FrameLayout>

我目前的结果如下:

enter image description here

    <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <android.support.v7.widget.CardView
        android:id="@+id/select_language_button"
        android:layout_width="0dp"
        android:layout_height="80dp"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:foreground="?android:attr/selectableItemBackground"
        app:cardBackgroundColor="@android:color/transparent"
        app:cardCornerRadius="0dp"
        app:cardElevation="0dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/language_stroke">

            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="0dp"
                android:text="desc"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toLeftOf="@+id/textView1"
                app:layout_constraintTop_toBottomOf="@+id/textView1" />

            <TextView
                android:id="@+id/textView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:text="Text"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toRightOf="@+id/img_language"
                app:layout_constraintTop_toTopOf="parent" />

            <ImageView
                android:id="@+id/img_language"
                android:layout_width="32dp"
                android:layout_height="32dp"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="12dp"
                android:layout_marginStart="12dp"
                android:layout_marginTop="8dp"
                android:src="@drawable/ic_language_white_48dp"
                android:tint="@color/language_color"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toTopOf="parent" />
        </android.support.constraint.ConstraintLayout>
    </android.support.v7.widget.CardView>

</android.support.constraint.ConstraintLayout>

问题是将cardView + textView1置于cardview中心。我只是将textView置于中心,而textView1位于下方。

我已经尝试“垂直打包”,然后“垂直居中”两个但是我没有得到一个结果,一个LinearLayout(持有两个textview)实现当它的android:layout_centerVertical =“true”在cardview内。 / p>

我想用可视化编辑器代替更改xml。

我知道实现它的方法是使用链,但是我无法在cardview中使用布局编辑。

有人可以帮助一些屏幕截图/屏幕录像机吗?

1 个答案:

答案 0 :(得分:1)

是的,您必须使用文本视图的垂直打包链和textView1将它们放在CardView中。

要在布局编辑器中添加链,您应该同时选择textView和textView1,右键单击它们并选择&#34;垂直居中&#34;

Adding chain in Layout Editor

要将连锁样式更改为已打包,您应该点击&#34; chain&#34;图标,直到选择打包样式

Change chain style in Layout Editor

Build a Responsive UI with ConstraintLayout - Control linear groups with a chain包含一个视频,演示如何在布局编辑器中添加链并更改其样式。

特定情况的XML布局:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.CardView
        android:id="@+id/select_language_button"
        android:layout_width="0dp"
        android:layout_height="80dp"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:foreground="?android:attr/selectableItemBackground"
        app:cardBackgroundColor="@android:color/transparent"
        app:cardCornerRadius="0dp"
        app:cardElevation="0dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/language_stroke">

            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="0dp"
                android:text="desc"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toLeftOf="@+id/textView1"
                app:layout_constraintTop_toBottomOf="@+id/textView1" />

            <TextView
                android:id="@+id/textView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:text="Text"
                app:layout_constraintBottom_toTopOf="@+id/textView"
                app:layout_constraintLeft_toRightOf="@+id/img_language"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_chainStyle="packed" />

            <ImageView
                android:id="@+id/img_language"
                android:layout_width="32dp"
                android:layout_height="32dp"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="12dp"
                android:layout_marginStart="12dp"
                android:layout_marginTop="8dp"
                android:src="@drawable/ic_language_white_48dp"
                android:tint="@color/language_color"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

        </android.support.constraint.ConstraintLayout>

    </android.support.v7.widget.CardView>

</android.support.constraint.ConstraintLayout>
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