Percent library

percent_example

<LinearLayout
    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">


    <android.support.percent.PercentRelativeLayout
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        >

        <View
            android:id="@+id/top_left"
            android:layout_alignParentTop="true"
            android:layout_height="0dp"
            android:layout_width="0dp"
            android:background="#ff44aacc"
            app:layout_heightPercent="20%"
            app:layout_widthPercent="70%"/>

        <View
            android:id="@+id/top_right"
            android:layout_toRightOf="@+id/top_left"
            android:layout_alignParentTop="true"
            android:layout_height="0dp"
            android:layout_width="0dp"
            android:background="#ffe40000"
            app:layout_heightPercent="20%"
            app:layout_widthPercent="30%"/>


        <View
            android:id="@+id/bottom"
            android:layout_below="@+id/top_left"
            android:layout_height="0dp"
            android:layout_width="match_parent"
            android:background="#ff00ff22"
            app:layout_heightPercent="80%"/>


    </android.support.percent.PercentRelativeLayout>


</LinearLayout>