Android 23

今天学习了百分比相对布局

在build。gradle中写入了

implementation'com.android.support:percent:30.0.3'

30.0.3'是当前版本的版本号

buildToolsVersion "30.0.3"
之后通过layout

<?xml version="1.0" encoding="utf-8"?>
<androidx.percentlayout.widget.PercentRelativeLayout 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"
    tools:context=".PercentLayoutActivity">
    <TextView
        android:id="@+id/tv_left_top"
        app:layout_widthPercent = "30%"
        app:layout_heightPercent = "18%"
        android:background="#dd0000"
        android:gravity="center"
        android:textSize="16sp"
        android:textStyle="bold"
        android:text="30%"
        />
    <TextView
        android:id="@+id/tv_right_top"
        app:layout_widthPercent = "70%"
        app:layout_heightPercent = "18%"
        android:background="@color/black"
        android:layout_toRightOf="@id/tv_left_top"
        android:gravity="center"
        android:textSize="16sp"
        android:textStyle="bold"
        android:text="70%"
        android:textColor="#ffffff"
        />
    <TextView
        android:id="@+id/tv_center_left"
        app:layout_widthPercent = "50%"
        app:layout_heightPercent = "18%"
        android:layout_below="@id/tv_left_top"
        app:layout_marginTopPercent="8%"
        android:background="@color/black"
        android:gravity="center"
        android:textSize="16sp"
        android:textStyle="bold"
        android:text="50%"
        android:textColor="#ffffff"
        />
    <TextView
        android:id="@+id/tv_button_left"
        app:layout_widthPercent = "80%"
        app:layout_heightPercent = "18%"
        android:layout_below="@id/tv_center_left"
        app:layout_marginTopPercent="8%"
        android:background="@color/black"
        android:gravity="center"
        android:textSize="16sp"
        android:textStyle="bold"
        android:text="800%"
        android:textColor="#ffffff"
        />

</androidx.percentlayout.widget.PercentRelativeLayout>