使用ConstraintLayout-Android时未完全显示视图内容

Question

app:layout_constraintRight_toRightOf="@+id/colorPicker"
app:layout_constraintLeft_toLeftOf="@+id/colorPicker"

有人能解释这种行为以及如何修复它吗？

我为此使用的完整xml代码：

<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="xxx.xxx.xxx.MainActivity">

    <com.rarepebble.colorpicker.ColorPickerView
        android:id="@+id/colorPicker"
        android:layout_width="wrap_content"
        android:layout_height="0dp"

        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/guideline"

        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        />

    <android.support.constraint.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintGuide_percent="0.60"
        android:orientation="horizontal"
        />

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="Hello World! Some chars in this TextView are cut on the right side."

        app:layout_constraintTop_toTopOf="@+id/guideline"
        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintRight_toRightOf="@+id/colorPicker"
        app:layout_constraintLeft_toLeftOf="@+id/colorPicker"
        />

</android.support.constraint.ConstraintLayout>

Answer 1

您是否尝试使用LinearLayout？对于像这样的问题，一个视图需要占据一定比例的屏幕，使用layout_weight

使用LinearLayout的解决方案

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:orientation="vertical">
        <com.rarepebble.colorpicker.ColorPickerView
            android:id="@+id/colorPicker"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_gravity="center"
            android:layout_weight="6"
            />
        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="4">
            <TextView
                android:id="@+id/textView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="Hello World! Some chars in this TextView are cut on the right side." />
        </FrameLayout>
</LinearLayout>

基于注释进行编辑

<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">

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floatingActionButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:fabSize="normal"
        android:layout_marginStart="16dp"
        app:layout_constraintLeft_toLeftOf="@+id/linearContainer"
        app:layout_constraintTop_toTopOf="@+id/linearContainer"
        android:layout_marginTop="16dp" />

    <View
        android:id="@+id/view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="0dp"
        android:layout_marginLeft="0dp"
        android:layout_marginRight="0dp"
        android:layout_marginTop="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0" />

    <LinearLayout
        android:id="@+id/linearContainer"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_marginBottom="0dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="8dp"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginLeft="8dp"
        app:layout_constraintVertical_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent">

        <com.rarepebble.colorpicker.ColorPickerView
            android:id="@+id/colorPicker"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_gravity="center"
            android:layout_weight="6" />

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="4">

            <TextView
                android:id="@+id/textView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="Hello World! Some chars in this TextView are cut on the right side." />
        </FrameLayout>
    </LinearLayout>

</android.support.constraint.ConstraintLayout>