我有 5 个正方形图 block ，所有这些图 block 都需要大小相同但灵活，以便它可以扩大和缩小以适应不同的显示尺寸。每个图 block 下方都有文字。我希望最后一行水平居中，并希望尽可能仅使用 xml 来执行此操作。我还有一个工具栏和一个导航栏。这是我的 xml 文件:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" android:background="@drawable/sunrise" tools:layout_editor_absoluteY="25dp">
<android.support.v7.widget.Toolbar
android:id="@+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/toolBarColor"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navigationIcon="@drawable/refresh2">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Now - The Technology"
android:textColor="@color/appTitleColor"
android:textSize="18sp"
android:layout_gravity="center"
android:id="@+id/toolbar_title"/>
</android.support.v7.widget.Toolbar>
<ImageView
android:id="@+id/ivPlay"
app:layout_constraintDimensionRatio="1:1"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@drawable/play"
android:scaleType="fitXY" android:adjustViewBounds="true"
android:contentDescription="@string/con_des_play"
app:layout_constraintTop_toBottomOf="@+id/my_toolbar"
android:layout_marginTop="16dp"
app:layout_constraintStart_toStartOf="parent"
android:layout_marginStart="16dp"
app:layout_constraintEnd_toStartOf="@+id/ivReminder"
android:layout_marginEnd="16dp"
/>
<TextView android:id="@+id/tvPlay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="@+id/ivPlay"
app:layout_constraintEnd_toEndOf="@+id/ivPlay"
app:layout_constraintTop_toBottomOf="@+id/ivPlay"
android:layout_marginBottom="2dp"
android:text="@string/play_10_minutes"
android:textColor="@color/iconTextColor"
android:textSize="16sp"
/>
<ImageView
android:id="@+id/ivReminder"
app:layout_constraintDimensionRatio="1:1"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@drawable/reminder"
android:scaleType="fitXY" android:adjustViewBounds="true"
android:contentDescription="@string/con_des_play"
app:layout_constraintTop_toBottomOf="@+id/my_toolbar"
android:layout_marginTop="16dp"
app:layout_constraintEnd_toEndOf="parent"
android:layout_marginEnd="16dp"
app:layout_constraintStart_toEndOf="@+id/ivPlay"
android:layout_marginStart="16dp"
/>
<TextView android:id="@+id/tvReminder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="@+id/ivReminder"
app:layout_constraintEnd_toEndOf="@+id/ivReminder"
app:layout_constraintTop_toBottomOf="@+id/ivReminder"
android:layout_marginBottom="2dp"
android:text="@string/now_reminder"
android:textColor="@color/iconTextColor"
android:textSize="16sp"
/>
<ImageView
android:id="@+id/ivGuide"
app:layout_constraintDimensionRatio="1:1"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@drawable/guide"
android:scaleType="fitXY" android:adjustViewBounds="true"
android:contentDescription="@string/con_des_play"
app:layout_constraintTop_toBottomOf="@+id/tvPlay"
android:layout_marginTop="20dp"
app:layout_constraintStart_toStartOf="@+id/ivPlay"
app:layout_constraintEnd_toEndOf="@+id/ivPlay"
app:layout_constraintHorizontal_bias="1.0"/>
<TextView android:id="@+id/tvGuide"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="@+id/ivGuide"
app:layout_constraintEnd_toEndOf="@+id/ivGuide"
app:layout_constraintTop_toBottomOf="@+id/ivGuide"
android:layout_marginBottom="2dp"
android:text="@string/guide"
android:textColor="@color/iconTextColor"
android:textSize="16sp"
/>
<ImageView
android:id="@+id/ivUpgrade"
app:layout_constraintDimensionRatio="1:1"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@drawable/upgrade"
android:scaleType="fitXY" android:adjustViewBounds="true"
android:contentDescription="@string/con_des_play"
app:layout_constraintTop_toTopOf="@+id/ivGuide"
app:layout_constraintStart_toStartOf="@+id/ivReminder"
app:layout_constraintEnd_toEndOf="@+id/ivReminder"
/>
<TextView android:id="@+id/tvUpgrade"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="@+id/ivUpgrade"
app:layout_constraintEnd_toEndOf="@+id/ivUpgrade"
app:layout_constraintTop_toBottomOf="@+id/ivUpgrade"
android:layout_marginTop="2dp"
android:text="@string/upgrade"
android:textColor="@color/iconTextColor"
android:textSize="16sp"
/>
<ImageView
android:id="@+id/ivLearn"
app:layout_constraintDimensionRatio="1:1"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@drawable/learn"
android:scaleType="fitXY" android:adjustViewBounds="true"
android:contentDescription="@string/con_des_play"
app:layout_constraintTop_toBottomOf="@+id/tvGuide"
app:layout_constraintStart_toStartOf="@+id/ivGuide"
app:layout_constraintEnd_toEndOf="@+id/ivGuide"
app:layout_constraintBottom_toTopOf="@+id/tvLearn"
android:layout_marginTop="16dp"
android:foregroundGravity="center_horizontal"
app:layout_constraintHorizontal_bias="0.5"/>
<TextView android:id="@+id/tvLearn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="@+id/ivLearn"
app:layout_constraintEnd_toEndOf="@+id/ivLearn"
app:layout_constraintTop_toBottomOf="@+id/ivLearn"
app:layout_constraintBottom_toTopOf="@+id/navigation"
android:text="@string/learn"
android:textColor="@color/iconTextColor"
android:textSize="16sp"
android:layout_marginTop="2dp"
android:layout_marginBottom="16dp"
/>
<android.support.design.widget.BottomNavigationView
android:id="@+id/navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#D3D3D3"
app:menu="@menu/navigation" app:itemTextColor="@color/navAccent" style="@style/AppTheme"
android:visibility="visible" app:itemIconTint="@color/navAccent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="0dp"/>
</android.support.constraint.ConstraintLayout>
提前致谢。
最佳答案
尝试更改 android:id="@+id/ivLearn" 的属性
来自
app:layout_constraintStart_toStartOf="@+id/ivGuide"
app:layout_constraintEnd_toEndOf="@+id/ivGuide"
到
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
关于android - 如何使用约束布局将 imageView 在第三行居中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53370213/