小编Jud*_*uto的帖子

我正在使用一个应用程序,SurfaceView在用户定义的某些参数下绘制对象.我为应用程序创建了布局,其中包括页眉,页脚,输入(用户输入要绘制的参数)和自定义SurfaceView.

这是简化的布局:

<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">

    <!-- Custom SurfaceView Layout -->

    <org.firengine.myapp.CustomPreview
        android:id="@+id/container_content"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <!-- Header Layout: This is basically a Toolbar, with having a top padding of status bar height (see Note). -->

    <FrameLayout
        android:id="@+id/container_header"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:background="@color/colorTint"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">...</FrameLayout>

    <!-- Footer Layout - This is just a container, with having a bottom padding of navigation bar height (see Note). -->

    <FrameLayout
        android:id="@+id/container_footer"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:background="@color/colorTint" …