android->将ImageView的高度设置为父级的动态高度

与 ConstraintLayout 通过将高度设置为,可以匹配其他视图的高度 0dp

我删掉了布局的其他部分,所以您必须添加它们,但下面是图像和文本的代码。 Produce this

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView 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/cardview"
    app:cardBackgroundColor="#FF6B6B"
    android:layout_marginBottom="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginRight="16dp"
    android:layout_marginLeft="16dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:cardCornerRadius="8dp">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <ImageView
            android:id="@+id/background"
            android:layout_width="0dp"
            android:layout_height="0dp"

            tools:src="@tools:sample/avatars"
            android:scaleType="centerCrop"

            app:layout_constraintStart_toStartOf="@id/text"
            app:layout_constraintEnd_toEndOf="@id/text"
            app:layout_constraintTop_toTopOf="@id/text"
            app:layout_constraintBottom_toBottomOf="@id/text" />

        <TextView
            android:id="@+id/text"
            android:layout_width="0dp"
            android:layout_height="wrap_content"

            android:ellipsize="end"
            android:lineSpacingExtra="4dp"
            android:maxLines="4"
            android:text="This sounded nonsense to Alice, so she said nothing, but set off at her being blah blah This sounded nonsense to Alice, so she said nothing, but set off at her being blah blah"
            android:textSize="14sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>

正确的方法是使用@Hkon-Schia代码。 但如果您想使用FrameLayout,请像这样在RelativeLayout中添加,并使用“alignBottom”约束在其中添加ImageView:

<?xml version="1.0" encoding="utf-8"?>

<androidx.cardview.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/cardview"
    app:cardBackgroundColor="#FF6B6B"
    android:layout_marginBottom="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginRight="16dp"
    android:layout_marginLeft="16dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:cardCornerRadius="8dp">

    <!--
        Code added here...
    -->
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/background"
        android:background="@drawable/universe1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/frameLayout"
        android:scaleType="centerCrop">
    </ImageView>

    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <!--<ImageView
            android:src="@drawable/universe1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scaleType="centerCrop">
        </ImageView>-->
        <LinearLayout
            android:id="@+id/layout_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <TextView
                android:layout_marginLeft="8dp"
                android:textColorLink="@color/white"
                android:layout_marginBottom="8dp"
                android:id="@+id/text"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="2dp"
                android:ellipsize="end"
                android:fontFamily="@font/compact_text_regular"
                android:maxLines="4"
                android:text="This sounded nonsense to Alice, so she said nothing, but set off at her being blah blah This sounded nonsense to Alice, so she said nothing, but set off at her being blah blah"
                android:textColor="@color/white"
                android:textSize="14sp"
                android:lineSpacingExtra="4dp" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <LinearLayout
                    android:visibility="gone"
                    android:id="@+id/like_icon_wrap"
                    android:clickable="true"
                    android:layout_gravity="center"
                    android:layout_width="40dp"
                    android:layout_height="30dp"
                    android:orientation="horizontal">

                    <ImageView
                        android:layout_marginLeft="8dp"
                        android:id="@+id/like_icon"
                        android:layout_gravity="center_vertical"
                        android:layout_width="16dp"
                        android:layout_height="16dp"
                        app:srcCompat="@drawable/heart_white" />

                    <TextView
                        android:id="@+id/likes_count"
                        android:layout_gravity="center"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:fontFamily="@font/compact_text_regular"
                        android:textColor="@color/white"
                        android:textSize="16sp"
                        android:text="0" />
                </LinearLayout>

                <TextView
                    android:layout_marginRight="8dp"
                    android:layout_gravity="center"
                    android:id="@+id/more"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:fontFamily="sans-serif"
                    android:textColor="@color/colorPrimary"
                    android:gravity="right"
                    android:text="show more"
                    android:textSize="12sp"
                    android:visibility="invisible" />
            </LinearLayout>
        </LinearLayout>
    </FrameLayout>
    </RelativeLayout>
</androidx.cardview.widget.CardView>