content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:tools="http://schemas.android.com/tools"
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="wrap_content"
              app:layout_behavior="@string/appbar_scrolling_view_behavior"
              tools:showIn="@layout/activity_main">

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

        <Button
            android:id="@+id/btnPickImage"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Select or Capture picture" />

    </LinearLayout>
    <View
        android:layout_width="match_parent"
        android:layout_height="4dp" />
    <TextView
        android:id="@+id/resultTextView"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_weight="1"
        android:textColor="@color/colorPrimary"
        android:textSize="15sp" />
    <View
        android:layout_width="match_parent"
        android:layout_height="4dp" />
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="375dp"
        android:layout_weight="1" />

    <View
        android:layout_width="match_parent"
        android:layout_height="10dp" />
</LinearLayout>