Change linearLayout1 orientation vertical to horizontal and add some margin among them:
<GridLayout
android:orientation="horizontal"
android:rowCount="4"
android:columnCount="3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/gridLayoutSuburb">
<LinearLayout
android:orientation="horizontal"
android:id="@+id/linearLayout1"
android:layout_row="0"
android:layout_column="0"
android:layout_width="0dp"
android:layout_columnSpan="1"
android:layout_columnWeight="1"
android:background="@color/blue">
<EditText
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="@drawable/edittext"
android:id="@+id/select"
android:textColor="@color/white"
android:textSize="@dimen/_16sdp"
android:textColorHint="@color/white"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:hint="Select "
android:paddingLeft="@dimen/_5sdp"
android:layout_weight="1"
android:singleLine="true" />
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="20dp"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:id="@+id/selectImage"
android:src="@drawable/ic_menu_back" />
</LinearLayout>
</GridLayout>
change your Linearlayout `orientation` to `android:orientation="horizontal"` from `android:orientation="vertical"`
Use
android:orientation="horizontal"
Instead of
android:orientation="vertical"
**CODE**
<GridLayout
android:orientation="horizontal"
android:rowCount="4"
android:columnCount="3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/gridLayoutSuburb">
<LinearLayout
android:orientation="horizontal"
android:id="@+id/linearLayout1"
android:layout_row="0"
android:layout_column="0"
android:layout_width="0dp"
android:layout_columnSpan="1"
android:layout_columnWeight="1"
android:background="@color/blue">
<EditText
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="@drawable/edittext"
android:id="@+id/select"
android:textColor="@color/white"
android:textSize="@dimen/_16sdp"
android:textColorHint="@color/white"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:hint="Select "
android:paddingLeft="@dimen/_5sdp"
android:layout_weight="1"
android:singleLine="true" />
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:id="@+id/selectImage"
android:src="@drawable/ic_menu_back" />
</LinearLayout>
</GridLayout>
