Android学习随笔百分比布局

app->build compile 'com.android.support:percent:xx'

layout

<?xml version="1.0" encoding="utf-8"?>
<android.support.percent.PercentFrameLayout
    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">
    <Button
        android:id="@+id/Button9"
        android:text="Buttoon9"
        android:layout_gravity="left|top"
        app:layout_widthPercent="50%"
        app:layout_heightPercent="50%"/>
    <Button
        android:text="Button10"
        android:layout_gravity="right|top"
        app:layout_widthPercent="50%"
        app:layout_heightPercent="50%"/>
    <Button
        android:text="Button11"
        android:layout_gravity="right|bottom"
        app:layout_widthPercent="50%"
        app:layout_heightPercent="50%"/>
    <Button
        android:text="Button12"
        android:layout_gravity="left|bottom"
        app:layout_widthPercent="50%"
        app:layout_heightPercent="50%"/>
</android.support.percent.PercentFrameLayout>