android - Set a TextView exactly specific part of the photo?

Question

I need to set a TextView exactly specific part of the photo I am using from bellow xml but i set all of size manual I need to be dynamic for different size mobile:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"
        android:src="@drawable/list_back" />

    <TextView
        android:id="@+id/CallCenter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@android:color/background_dark"
        android:textStyle="bold" />
</RelativeLayout>

Answer 1

I resolve my problem :

<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scaleType="fitXY"
    android:src="@drawable/list_back" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <View
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <TextView
        android:id="@+id/CallCenter"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:paddingLeft="5dp"
        android:paddingRight="15dp"
        android:layout_weight="3"
        android:textColor="@android:color/background_dark"
        android:textStyle="bold" />
</LinearLayout>