更新行

Question

我有ListView每行都有一些小部件，我可以从Service更新单行。更新行工作正常，但我无法INVISIBLE或GONE 列表视图的行项。

例如，我的行有ImageView和ProgressBar。我不能在此代码中INVISIBLE这个小部件

private void updateView(int download_item_id, int position, int percent, final String stream_filename, final String thumb_path) {
        Log.e("receive: thumb_path: ", thumb_path);
        View v = UI.lv_message_content.getChildAt(position - UI.lv_message_content.getFirstVisiblePosition());
        UI.lv_message_content.getAdapter().getView(position, v, UI.lv_message_content);
        UI.lv_message_content.invalidateViews();
        if (v == null) return;

        ImageView         imgv_image_item   = (ImageView) v.findViewById(R.id.imgv_image_item);
        NumberProgressBar numberProgressBar = (NumberProgressBar) v.findViewById(R.id.npb_progressbar);
        ImageView         iv_download_icon  = (ImageView) v.findViewById(R.id.iv_download_icon);
        numberProgressBar.setProgress(percent);

        if (percent == 100) {
            numberProgressBar.setVisibility(View.GONE);
            iv_download_icon.setVisibility(View.GONE);
        }
    }

如果百分比等于100，那么代码View.GONE中的numberProgressBar和iv_download_icon无效。我正在测试和调试代码嵌套if工作但是没有设置为窗口小部件

Answer 1

我想你错过了notifyDatasetChnaged()

if (percent == 100) {
     numberProgressBar.setVisibility(View.GONE);
     iv_download_icon.setVisibility(View.GONE);
     notifyDatasetChanged()
}

Answer 2

我删除了这一行，问题解决了：

invalidateViews();