为什么我的TextViews在ConstraintLayout中提前包装？

Question

我在ConstraintLayout中有三个TextView,带有边距以使它们全部位于屏幕的中心.由于某种原因,TextViews中的文本被提前包装,即使第一行仍有空间.这里是什么样的布局应该看起来像预览:

以下是它在运行时的实际外观:

您可以在TextViews右侧看到文本可以放在第一行的额外空间.请记住,设备和预览都适用于Nexus 5X.

以下是此布局的XML:

<android.support.constraint.ConstraintLayout
     android:id="@+id/bullet_holder"
     android:layout_width="0dp"
     android:layout_height="wrap_content"
     android:layout_marginEnd="45dp"
     android:layout_marginLeft="45dp"
     android:layout_marginRight="45dp"
     android:layout_marginStart="45dp"
     app:layout_constraintBottom_toBottomOf="parent"
     app:layout_constraintLeft_toLeftOf="parent"
     app:layout_constraintRight_toRightOf="parent"
     app:layout_constraintTop_toBottomOf="@+id/setup_intro_subheader"
     app:layout_constraintVertical_bias="0.23000002">

     <ImageView
         android:id="@+id/setup_intro_bullet_first"
         style="@style/TextAppearance.AppCompat.Headline"
         android:layout_width="4dp"
         android:layout_height="4dp"
         android:baseline="7dp"
         android:src="@drawable/circle"
         app:layout_constraintBaseline_toBaselineOf="@+id/setup_intro_bullet_first_text"
         app:layout_constraintLeft_toLeftOf="parent" />

     <TextView
         android:id="@+id/setup_intro_bullet_first_text"
         style="@style/TextAppearance.AppCompat.Subhead"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginLeft="6dp"
         android:layout_marginStart="6dp"
         android:text="@string/setup_intro_benefit_notification"
         android:textColor="@android:color/white"
         app:layout_constraintLeft_toRightOf="@+id/setup_intro_bullet_first"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />

     <ImageView
         android:id="@+id/setup_intro_bullet_second"
         style="@style/TextAppearance.AppCompat.Headline"
         android:layout_width="4dp"
         android:layout_height="4dp"
         android:baseline="7dp"
         android:src="@drawable/circle"
         app:layout_constraintBaseline_toBaselineOf="@+id/setup_intro_bullet_second_text"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toLeftOf="@+id/setup_intro_bullet_second_text" />

     <TextView
         android:id="@+id/setup_intro_bullet_second_text"
         style="@style/TextAppearance.AppCompat.Subhead"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginLeft="6dp"
         android:layout_marginStart="6dp"
         android:layout_marginTop="20dp"
         android:text="@string/setup_intro_benefit_backlog"
         android:textColor="@android:color/white"
         app:layout_constraintLeft_toRightOf="@+id/setup_intro_bullet_second"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/setup_intro_bullet_first_text" />

     <ImageView
         android:id="@+id/setup_intro_bullet_third"
         style="@style/TextAppearance.AppCompat.Headline"
         android:layout_width="4dp"
         android:layout_height="4dp"
         android:baseline="7dp"
         android:src="@drawable/circle"
         app:layout_constraintBaseline_toBaselineOf="@+id/setup_intro_bullet_third_text"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toLeftOf="@+id/setup_intro_bullet_third_text" />

     <TextView
         android:id="@+id/setup_intro_bullet_third_text"
         style="@style/TextAppearance.AppCompat.Subhead"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginLeft="6dp"
         android:layout_marginStart="6dp"
         android:layout_marginTop="20dp"
         android:text="@string/setup_intro_benefit_browser"
         android:textColor="@android:color/white"
         app:layout_constraintLeft_toRightOf="@+id/setup_intro_bullet_third"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/setup_intro_bullet_second_text" />

 </android.support.constraint.ConstraintLayout>

Answer 1

对于每个文本视图，设置以下内容：

    android:breakStrategy="simple"

参见android：breakStrategy。

这里更深层的问题是，为什么设计师默认情况下会显示与仿真器/设备不同的东西？