可调节的自定义UI

Question

我有一个由3个元素组成的自定义视图.我希望视图适应它可用的大小.我希望它看起来像.

但为了使它看起来像这样我必须添加硬编码大小约束,从而使它无法自适应.

这就是它在所有图像视图上使用match_constraint的样子(不是我想要它的样子 ):

这是xml布局.

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto">
  <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="in.avimarine.boatangels.activities.InspectionResultActivity"
    tools:visibility="visible">

    <ImageView
      android:id="@+id/moored_boat_bowlines"
      android:layout_width="0dp"
      android:layout_height="0dp"
      android:contentDescription="@string/boat_drawing_content_description"
      app:layout_constraintBottom_toTopOf="@+id/moored_boat_body"
      app:layout_constraintEnd_toEndOf="@+id/moored_boat_body"
      app:layout_constraintStart_toStartOf="@+id/moored_boat_body"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_monohull_mooring_bow"
      tools:visibility="visible"/>
    <ImageView
      android:id="@+id/moored_boat_body"
      android:layout_width="0dp"
      android:layout_height="0dp"
      android:contentDescription="@string/boat_drawing_content_description"
      app:layout_constraintBottom_toTopOf="@+id/moored_boat_sternlines"
      app:layout_constraintDimensionRatio="h,1:1"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toStartOf="parent"
      app:layout_constraintTop_toBottomOf="@+id/moored_boat_bowlines"
      app:layout_constraintVertical_chainStyle="spread_inside"
      app:srcCompat="@drawable/ic_top_mv"
      tools:visibility="visible"/>
    <ImageView
      android:id="@+id/moored_boat_sternlines"
      android:layout_width="0dp"
      android:layout_height="0dp"
      android:layout_marginBottom="8dp"
      android:contentDescription="@string/boat_drawing_content_description"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="@+id/moored_boat_body"
      app:layout_constraintStart_toStartOf="@+id/moored_boat_body"
      app:layout_constraintTop_toBottomOf="@+id/moored_boat_body"
      app:srcCompat="@drawable/ic_monohull_dock_aft"
      tools:visibility="visible"/>

  </android.support.constraint.ConstraintLayout>
</merge>

如何使这种自​​适应仍然看起来像第一张图像？

Answer 1

您可以使用ConstraintLayout创建自定义自适应视图.请注意layout_constraintVertical_weight属性.

boat.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"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/moored_boat_bowlines"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:src="@drawable/bowlines"
        app:layout_constraintBottom_toTopOf="@+id/moored_boat_body"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="1" />

    <ImageView
        android:id="@+id/moored_boat_body"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:src="@drawable/body"
        app:layout_constraintBottom_toTopOf="@+id/moored_boat_sternlines"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/moored_boat_bowlines"
        app:layout_constraintVertical_weight="10" />

    <ImageView
        android:id="@+id/moored_boat_sternlines"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:src="@drawable/sternlines"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/moored_boat_body"
        app:layout_constraintVertical_weight="1" />

</android.support.constraint.ConstraintLayout>

然后您可以在任何其他布局中使用它.

activity_one.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:background="#8493"
        android:gravity="center"
        android:text="Filled!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

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

</LinearLayout>

activity_two.xml:

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

    <include
        android:id="@+id/boat_view"
        layout="@layout/boat"
        android:layout_width="100dp"
        android:layout_height="100dp" />

</android.support.constraint.ConstraintLayout>