電網constraintlayout

Question

我想有兩列格在約束佈局方形按鈕，這是我的xml但它顯示了一個大按鈕，當我加4鍵：

screen

，當我刪除2個按鈕每一件事情的偉大工程：

screen2

<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="wrap_content" 
    tools:context="com.example.poory.myapplication.MainActivity"> 

    <Button 
     android:id="@+id/button" 
     app:layout_constraintTop_toBottomOf="@id/slider" 
     android:layout_width="0dp" 
     android:layout_height="0dp" 
     app:layout_constraintDimensionRatio="H,1:1" 
     android:text="Button" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toLeftOf="@+id/button2" 
     android:layout_marginTop="0dp" /> 

    <Button 
     android:id="@+id/button2" 
     app:layout_constraintTop_toBottomOf="@id/slider" 
     android:layout_width="0dp" 
     android:layout_height="0dp" 
     android:text="Button" 
     app:layout_constraintDimensionRatio="H,1:1" 
     tools:layout_editor_absoluteY="232dp" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintLeft_toRightOf="@+id/button" /> 

    <Button 
     android:id="@+id/button3" 
     app:layout_constraintTop_toBottomOf="@id/button" 
     android:layout_width="0dp" 
     android:layout_height="0dp" 
     android:text="Button" 
     app:layout_constraintDimensionRatio="H,1:1" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toLeftOf="@+id/button2" /> 

    <Button 
     android:id="@+id/button4" 
     app:layout_constraintTop_toBottomOf="@id/button2" 
     android:layout_width="0dp" 
     android:layout_height="0dp" 
     android:text="Button" 
     app:layout_constraintDimensionRatio="H,1:1" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintLeft_toRightOf="@+id/button" /> 

</android.support.constraint.ConstraintLayout> 

此網格應該是scrollview，所以我不能使用父母的底部。

Answer 1

我添加了一個指導，這是爲我工作。

<Button 
    android:id="@+id/button" 
    app:layout_constraintTop_toBottomOf="@id/guideline" 
    android:layout_width="0dp" 
    android:layout_height="0dp" 
    app:layout_constraintDimensionRatio="H,1:1" 
    android:text="Button" 
    app:layout_constraintLeft_toLeftOf="parent" 
    app:layout_constraintRight_toLeftOf="@+id/button2" 
    android:layout_marginTop="0dp" /> 

<Button 
    android:id="@+id/button2" 
    app:layout_constraintTop_toBottomOf="@id/guideline" 
    android:layout_width="0dp" 
    android:layout_height="0dp" 
    android:text="Button" 
    app:layout_constraintDimensionRatio="H,1:1" 
    tools:layout_editor_absoluteY="232dp" 
    app:layout_constraintRight_toRightOf="parent" 
    app:layout_constraintLeft_toRightOf="@+id/button" /> 

<Button 
    android:id="@+id/button3" 
    app:layout_constraintTop_toBottomOf="@id/button" 
    android:layout_width="0dp" 
    android:layout_height="0dp" 

    android:text="Button" 
    app:layout_constraintDimensionRatio="H,1:1" 
    app:layout_constraintLeft_toLeftOf="parent" 
    app:layout_constraintRight_toLeftOf="@+id/button2" 
    /> 

<Button 
    android:id="@+id/button4" 
    app:layout_constraintTop_toBottomOf="@id/button2" 
    android:layout_width="0dp" 
    android:layout_height="0dp" 
    android:text="Button" 
    app:layout_constraintDimensionRatio="H,1:1" 
    app:layout_constraintRight_toRightOf="parent" 
    app:layout_constraintLeft_toRightOf="@+id/button" /> 

<android.support.constraint.Guideline 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/guideline" 
    app:layout_constraintGuide_begin="87dp" 
    android:orientation="horizontal" />