Doesn't render when the child is a GridView

[xarlotie]

    <com.otaliastudios.zoom.ZoomLayout
        android:id="@+id/zoom"
        android:layout_width="320dp"
        android:layout_height="500dp"
        android:scrollbars="vertical|horizontal"
        app:overScrollHorizontal="true"
        app:overScrollVertical="true"
        app:overPinchable="true"
        app:horizontalPanEnabled="true"
        app:verticalPanEnabled="true"
        app:zoomEnabled="true"
        app:minZoom="0.7"
        app:minZoomType="zoom"
        app:maxZoom="3.0"
        app:maxZoomType="zoom"
        app:hasClickableChildren="true">

        <GridView
            android:id="@+id/gridview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scrollbars="none"
            android:numColumns="30"
            android:verticalSpacing="2dp"
            android:horizontalSpacing="2dp"
            android:stretchMode="columnWidth"
            android:gravity="center"
            android:overScrollMode="never"
            android:fadingEdge="none" />

    </com.otaliastudios.zoom.ZoomLayout>

I don't see the gridview when I try this code. Also, when the width and height of the zoomlayout are match_parent, it throws a RuntimeException saying ZoomLayout must be used with fixed dimensions. Any help?

[markusressel]

I think this is because you use

android:layout_width="match_parent"
android:layout_height="wrap_content"

in your GridView. Afaik GridView by default does not support wrap_content. You can try to set absolute dimensions on your GridView programmatically after the parent ZoomLayout has been layouted using something like this:

final GridView gridView = findViewById(R.id.gridview);
zoomLayout.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
    @Override
    public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
        ViewGroup.LayoutParams params = gridView.getLayoutParams();
        params.width = v.getWidth();
        params.height = v.getHeight();
        gridView.setLayoutParams(params);
    }
});
gridView.setAdapter(new GridViewAdapter());

But I haven't tested this.

The main problem here is (again) that a GridView is scrollable. This interferes with the scroll of the ZoomLayout parent. I don't know if it is possible to disable the scroll on a GridView but you would have to do this to avoid issues with that too.

[markusressel]

@xarlotie Take a look at the issue/gridview branch I created.
It works for me, although I would suggest using a different layout instead of GridView because of the scrolling issues. ZoomLayout should be the only view that controls scroll and zoom.

[markusressel]

Closing because of inactivity.