<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/image_picker"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/image_thumbnail"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

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

        <ImageButton
            android:id="@+id/camera_button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/camera" />

        <ImageButton
            android:id="@+id/gallery_button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/gallery" />

        <ImageButton
            android:id="@+id/edit_button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/brush" />
    </LinearLayout>

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

    <ImageView
            android:id="@+id/image_thumbnail"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_above="@+id/button_container"
            android:layout_alignParentTop="true"/>

    <LinearLayout
            android:id="@+id/button_container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_alignParentBottom="true">

        <ImageButton
                android:id="@+id/camera_button"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:src="@drawable/camera"/>

        <ImageButton
                android:id="@+id/gallery_button"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:src="@drawable/gallery"/>

        <ImageButton
                android:id="@+id/edit_button"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:src="@drawable/brush"/>
    </LinearLayout>

</RelativeLayout>
Make the image picker buttons big enough to always be clickable
Make the image picker buttons big enough to always be clickable
