Android:如何通过父级剪辑视图,如CSS overflow:hidden

Question

我的意见如下:

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="@dimen/global_legal_gap"
    android:clipToPadding="true"
    android:clipChildren="true"
    android:baselineAligned="false"
    android:background="@drawable/post_sound_bg"
    android:foreground="?attr/selectableItemBackgroundBorderless"
    android:orientation="horizontal">

    <RelativeLayout
        android:layout_width="@dimen/post_sound_card_height"
        android:layout_height="@dimen/post_sound_card_height">

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/album_art"
            android:layout_width="@dimen/post_sound_card_height"
            android:layout_height="@dimen/post_sound_card_height"
            fresco:backgroundImage="@drawable/music_placeholder" />

        <RelativeLayout
            android:id="@+id/play_icon_control"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentBottom="true"
            android:visibility="gone">

            <View
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_centerInParent="true"
                android:layout_margin="3dp" />
        </RelativeLayout>
    </RelativeLayout>
<LinearLayout>

作为家长表示RelativeLayout,我使用的是android:clipToPadding="true"和 android:clipChildren="true",但这个父视图的孩子还在外面突出.

或者我是这样做的吗？我如何实现像CSS这样的东西overflow:hidden？

Answer 1

考虑改变布局.你想要的是什么ConstraintLayout.

只需设置布局的尺寸,不要在要溢出/隐藏的部件上设置约束.

以下代码显示了View将其尺寸调整为其约束以及另一个溢出的代码.

创建一个新的android项目并将其粘贴为 activity_main.xml

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:layout_margin="55dp">


    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@android:drawable/sym_def_app_icon"/>

    <android.support.constraint.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_begin="84dp"/>

    <ImageView
        android:id="@+id/imageView4"
        android:layout_width="0dp"
        android:layout_height="300dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline"
        app:srcCompat="@mipmap/ic_launcher"/>
</android.support.constraint.ConstraintLayout>