dependencies {

    compile 'com.android.support:percent:22.2.0'

}

支持布局

PercentRelativeLayout

<android.support.percent.PercentRelativeLayout    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">

    <View

        android:id="@+id/top_left"

        android:layout_width="0dp"

        android:layout_height="0dp"

        android:layout_alignParentTop="true"

        android:background="#ff44aacc"

        app:layout_heightPercent="20%"

        app:layout_widthPercent="70%" />

    <View

        android:id="@+id/top_right"

        android:layout_width="0dp"

        android:layout_height="0dp"

        android:layout_alignParentTop="true"

        android:layout_toRightOf="@+id/top_left"

        android:background="#ffe40000"

        app:layout_heightPercent="20%"

        app:layout_widthPercent="30%" />

    <View

        android:id="@+id/bottom"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_below="@+id/top_left"

        android:background="#ff00ff22"

        app:layout_heightPercent="80%" />

</android.support.percent.PercentRelativeLayout>