Android 按百分比来设置控件宽高

添加支持库

dependencies {
    compile 'com.android.support:percent:22.2.0'
}

支持的布局：

PercentRelativeLayout PercentFrameLayout

用法也很简单:

<?xml version="1.0" encoding="utf-8"?>
<android.support.percent.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:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/button1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:text="click"
        app:layout_heightPercent="10%"
        app:layout_widthPercent="50%" />

</android.support.percent.PercentRelativeLayout>