SimpleCursorAdapter GridView with ImageView from sdcard path

I Have the next layout for my GridView

<LinearLayout xmlns:android="http://ift.tt/nIICcg"
xmlns:tools="http://ift.tt/LrGmb4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="5dp"
android:paddingTop="5dp">
<ImageView
    android:id="@+id/grid_image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/def_img"
    android:background="@drawable/drop_shadow"
    android:adjustViewBounds="true">
</ImageView>
<TextView
    android:id="@+id/grid_text"
    android:ellipsize="start"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TITLE"
    android:textColor="#cecece"
    android:textSize="14sp"
    android:singleLine="true"
    android:textAllCaps="true"
    android:layout_gravity="start"
    >
</TextView>

I am trying to populate the GridView from a database i created. The image is stored as a string which contain a path to the image location on the sdcard like so

String iconsStoragePath = Environment.getExternalStorageDirectory() + "/MoviesPosters/myPosters/";
File sdIconStorageDir = new File(iconsStoragePath);
String filePath = sdIconStorageDir.toString() + filename+".png";

Each item on the database has a path with his DbConstants.TITLE in it.

How can i make the adapter to set the image from the sdcard? Thanks.