<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="90dp"
android:layout_height="130dp"
android:id="@+id/card_view"
android:layout_margin="5dp"
card_view:cardCornerRadius="12dp"
card_view:cardElevation="3dp"
card_view:contentPadding="0dp"
card_view:cardBackgroundColor="@color/lightBrown"
android:foreground="?selectableItemBackground"
android:clickable="true">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/button_card_unlocked_bg"
    android:orientation="vertical"
    android:padding="5dp">
    <LinearLayout
        android:id="@+id/prvniLin"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <ImageView
            android:id="@+id/imgView"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:layout_margin="3dp"
            android:src="@drawable/kostka" />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_marginTop="1dp"
        android:layout_marginHorizontal="3dp">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="26dp"
            android:background="@color/blueDark"
            android:padding="5dp">
            <TextView
                android:id="@+id/date"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Datum nálezu: "
                android:textColor="@color/white"
                android:textSize="6dp" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

LayoutInflater inflater = (LayoutInflater) getActivity()
                        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                View v = inflater.inflate(R.layout.card_layout_unlocked, null);
                MarkerOptions mO = new MarkerOptions().position(new LatLng(mData.getLat(), mData.getLng())).title(mData.getTitle()).icon(BitmapDescriptorFactory.fromBitmap(loadBitmapFromView(v)));
                Marker m = mMap.addMarker(mO);

public static Bitmap loadBitmapFromView(View v) { //Source: https://stackoverflow.com/questions/2801116/converting-a-view-to-bitmap-without-displaying-it-in-android
   if (v.getMeasuredHeight() <= 0) {
        v.measure(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        Bitmap b = Bitmap.createBitmap(v.getMeasuredWidth(), v.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
        Canvas c = new Canvas(b);
        v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
        v.draw(c);
        return b;
    }
    return null;

}