Try PercentRelativeLayout and PercentFrameLayout of Percent Support Library

The Percent package provides APIs to support adding and managing percentage based dimensions in your app.

- Make sure you have downloaded/updated the Android Support Repository using the SDK Manager.

- Edit build.gradle, to add dependencies compile 'com.android.support:percent:23.0.0'.

Example of using PercentRelativeLayout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:padding="@dimen/activity_horizontal_margin"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold" />

    <android.support.percent.PercentRelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >
        <ImageView
            android:id="@+id/imageview"
            android:layout_gravity="center"
            app:layout_widthPercent="50%"
            app:layout_heightPercent="50%"
            android:src="@mipmap/ic_launcher"
            android:background="#cecece"/>
        <TextView
            android:id="@+id/textview1"
            android:layout_below="@id/imageview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_marginStartPercent="25%"
            app:layout_marginEndPercent="25%"
            android:text="PercentRelativeLayout example"
            android:background="#bebebe"/>
        <TextView
            android:id="@+id/textview2"
            android:layout_below="@id/textview1"
            android:layout_height="wrap_content"
            app:layout_widthPercent="60%"
            android:text="PercentRelativeLayout example"
            android:background="#aeaeae"/>

    </android.support.percent.PercentRelativeLayout>

</LinearLayout>

Example of using PercentFrameLayout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:padding="@dimen/activity_horizontal_margin"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold" />

    <android.support.percent.PercentFrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >
        <ImageView
            android:id="@+id/imageview"
            android:layout_gravity="center"
            app:layout_widthPercent="50%"
            app:layout_heightPercent="50%"
            android:src="@mipmap/ic_launcher"
            android:background="#cecece"/>
        <TextView
            android:id="@+id/textview1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_marginStartPercent="25%"
            app:layout_marginEndPercent="25%"
            android:text="PercentFrameLayout example"
            android:background="#bebebe"/>
        <TextView
            android:id="@+id/textview2"
            android:layout_height="wrap_content"
            app:layout_widthPercent="60%"
            android:text="PercentFrameLayout example"
            android:background="#aeaeae"/>

    </android.support.percent.PercentFrameLayout>

</LinearLayout>