Android: 5 buttons location: a better way?

I want to fix five buttons, as shown in the picture. But I put five buttons in the position of nexus 6. When I tried this code on nexus 10, I realized that I wasted an hour: all buttons are in different positions!

What is the best way to fix five buttons? All devices / screens can fix all positions

Does the following layout work?

RelativeLayout
   Linear1  ( for the first 2 buttons )
   Linear 2 ( for the 2 buttons next buttons )
   Linear 3 ( for the last button  )
/RelativeLayout

I repeat my question because I don't know: how to place a button in a specific position? For example, I want to place my green button at 70% of the top of the screen and 50% of the right / left of the screen

resolvent:

Try associating relativelayout with Android: layout_ alignParentTop,android：layout_ Centervertical is used together with other similar alignment attributes. They enable you to place buttons specifically in the layout to achieve the desired effect. The results are as follows:

This is the code:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.yourpackage.FiveButtonActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button1"
        android:id="@+id/button1"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button2"
        android:id="@+id/button2"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button3"
        android:id="@+id/button3"
        android:layout_centerVertical="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button4"
        android:id="@+id/button4"
        android:layout_alignBottom="@+id/button5"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button5"
        android:id="@+id/button5"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true" />
</RelativeLayout>