我读到ConstraintLayout是一个很棒的工具,可用于创建多种屏幕尺寸的应用,例如平板电脑和手机。
但即便如此。布局本身在不同的屏幕尺寸之间缩放(从我看到的),例如,我可以对TextView的文本大小做些什么呢?
我怎样才能使它成比例?
此外,如果你有更好的方法来为手机和平板电脑编写应用程序,也可以随时告诉我(我不希望为所有类型的屏幕创建不同的布局)。
代码示例:
<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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.merchantproxy.merchantproxy.activities.DashboardActivity"
tools:showIn="@layout/activity_dashboard">
<ScrollView
android:id="@+id/dashboardScrollView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginEnd="1dp"
android:layout_marginLeft="1dp"
android:layout_marginRight="1dp"
android:layout_marginStart="1dp"
android:layout_marginTop="157dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1">
<LinearLayout
android:id="@+id/dashboardDataLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:weightSum="1">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView
android:id="@+id/salesCard"
android:layout_width="0dp"
android:layout_height="170dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="32dp"
android:layout_marginRight="32dp"
android:layout_marginTop="8dp"
android:layout_weight="0.05"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintTop_creator="1"
android:layout_marginStart="32dp"
android:layout_marginEnd="32dp">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/salesTextView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:text="Sales"
android:textSize="20sp"
app:layout_constraintBottom_toTopOf="@+id/salesStats"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.constraint.ConstraintLayout
android:id="@+id/salesStats"
android:layout_width="0dp"
android:layout_height="100dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
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="1.0">
<android.support.constraint.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.33" />
<TextView
android:id="@+id/totalSales"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="40dp"
android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:layout_marginTop="16dp"
android:text="$0"
android:textAlignment="center"
android:textColor="@color/colorSuccess"
android:textSize="35sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/guideline"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="@+id/netSalesLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.538"
app:layout_constraintLeft_toRightOf="@+id/feesLayout"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintHorizontal_bias="0.963"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp">
<TextView
android:id="@+id/netSales"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="5dp"
android:text="$0"
android:textAlignment="center"
android:textColor="@color/colorSuccess"
android:textSize="35sp"
android:textStyle="bold"
tools:layout_editor_absoluteX="24dp"
tools:layout_editor_absoluteY="208dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Net Sales"
android:textAlignment="center"
android:textSize="20sp"
tools:layout_editor_absoluteX="24dp"
tools:layout_editor_absoluteY="208dp" />
</LinearLayout>
我提到我只在垂直方向的手机上才有这个问题...如果我将视图旋转到横向,一切都可以扩展