Java – When redrawing the project after calling ‘invalidateViews()’

When does the project redraw after calling invalidateViews()?

I

asked because I tried to refresh listItems after bg-thread notify image rsc download.

But there are no updates. A new icon is drawn only after exiting and re-entering.

I have an activity of type adapter SettingValueAdapter extends BaseAdapter

It has one member:

private SettingsValue[] value;

It has two interesting methods:

            @Override
            public View getView(int position, View view, ViewGroup parent) {

AddressItem ai= (AddressItem)getItem(position);
                DriveToNativeManager dnm = DriveToNativeManager.getInstance();

if (view == null) {
                    LayoutInflater li = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    view = li.inflate(R.layout.address_item, null);
                }

view.setTag(R.id.addressItem,ai);
                view.setTag(position);
                view.findViewById(R.id.fullAddressItemCol).setVisibility(View.VISIBLE);
                view.findViewById(R.id.addressItemTouch).setVisibility(View.GONE);
                view.findViewById(R.id.addressItemImage).setVisibility(View.GONE);

if (ai != null) {
                ...
    }
                    view.findViewById(R.id.addressItemIconLayout).setVisibility(View.VISIBLE);
                    Drawable icon = ResManager.GetSkinDrawable(ai.getIcon() + ".bin");
                    ((ImageView)view.findViewById(R.id.addressItemIcon)).setImageDrawable(icon);

..
                    }
}

public void refreshListIcons()  {

      NativeManager nativeManager = AppService.getNativeManager();
          SettingsValue[] values = new SettingsValue[categories.length];
          for (int i = 0; i < categories.length; i++) {
              values[i] = new SettingsValue(categories[i].value, nativeManager.getLanguageString(categories[i].displayString), false);
              values[i].icon = ResManager.GetSkinDrawable(categories[i].iconName + ".bin");
    //      }
          adapter.setValues(values);

this.runOnUiThread(new Runnable() {

@Override
                public void run() {
                    adapter.notifyDataSetChanged();         
                }
            });

}   

I attached a callback to the bg-thread (C) image download process.

The callback switches to the UI thread and calls this refreshList:

public void refreshSearchIconsOnSearchActivity() {

Runnable refreshViewEvent = new Runnable() {
            @Override
            public void run() {
                Activity currentActivity = AppService.getActiveActivity();

if (currentActivity instanceof SearchActivity) {

Log.d("w", "refreshSearchIconsOnSearchActivity callback running in thread "
                                    + Thread.currentThread().getId() );
                    results list
                    ((SearchActivity) currentActivity).refreshList();

}
            }
        };
        AppService.Post(refreshViewEvent);
    }

However, the picture has finished downloading and is not refreshed in the activity.

They only refresh when I leave and re-enter the activity.

What am I missing?

InvalidateViews only causes the listView to redraw itself. It doesn’t call getView to do this, it just resets the current View on the screen – basically it just does that

for(View child: getChildren()){
    child.invalidate();
}

If you want to update the list, call notifyDataSetChanged on the adapter.