Android ConstraintLayout按比例缩放View

向右看齐 2023-10-17 19:08 45阅读 0赞

**Android ConstraintLayout按比例缩放View**

关键点有两个，第一，使用Android ConstraintLayout的layout\_constraintDimensionRatio属性，设置宽高比缩放比例，宽:高。第二，恒定宽和高，另外一个方向就会按照比例缩放。

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
    
            <TextView
                android:id="@+id/text0"
                android:layout_width="0dp"
                android:layout_height="100dp"
                android:background="@android:color/holo_orange_light"
                android:gravity="center"
                android:text="w=0,h=100\n5:2"
                android:textColor="@android:color/white"
                android:textSize="10dp"
                app:layout_constraintDimensionRatio="5:2"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toTopOf="parent" />
    
            <TextView
                android:id="@+id/text1"
                android:layout_width="100dp"
                android:layout_height="0dp"
                android:background="@android:color/holo_red_light"
                android:gravity="center"
                android:text="w=100,h=0\n5:2"
                android:textColor="@android:color/white"
                android:textSize="10dp"
                app:layout_constraintDimensionRatio="5:2"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toBottomOf="@id/text0" />
        </android.support.constraint.ConstraintLayout>

运行结果如图：

![20180414102731604][]

[20180414102731604]: https://img-blog.csdn.net/20180414102731604