I ve got a listView, an ArrayList. 从活动1中,我通过了一些数据,如价格和公司名称。 这一数据将储存在哈希姆的阿雷拉。 当我先把一些数据带给持有《名单》的第二项活动时,数据将载于该清单,但在我回到第一项活动并再次传递一些信息时,旧数据仍将列入清单。 我是否可以防止这种情况发生? 例如,当我从活动2返回活动1时,名单就会被删除。
感谢!
I ve got a listView, an ArrayList. 从活动1中,我通过了一些数据,如价格和公司名称。 这一数据将储存在哈希姆的阿雷拉。 当我先把一些数据带给持有《名单》的第二项活动时,数据将载于该清单,但在我回到第一项活动并再次传递一些信息时,旧数据仍将列入清单。 我是否可以防止这种情况发生? 例如,当我从活动2返回活动1时,名单就会被删除。
感谢!
what you need to do: on the activity which holds the listView - override the onResume() method:
@Override
protected void onResume() {
super.onResume();
mArrayList.clear();
mAdapter.notifyDataSetChanged();
}
如果你不赞成填写清单,那么你可以做以下工作:
@Override
protected void onResume() {
super.onResume();
mListView.removeAllViews();
}
I m relatively new to Android development. I m developing an app with a ListView. I ve followed the info in #1338475 and have my app recognizing the fling gesture, but after the gesture is complete, ...
I m converting my code from using Handler to AsyncTask. The latter is great at what it does - asynchronous updates and handling of results in the main UI thread. What s unclear to me is how to handle ...
I want to be able to download a file with a particular extension from the net, and have it passed to my application to deal with it, but I haven t been able to figure out the intent filter. The ...
I am quite impressed by the workflow I follow when developing Android applications: Define a layout in an xml file and then write all the code in a code-behind style. Is there an equivalent style for ...
To draw landscapes, backgrounds with patterns etc, we used TiledLayer in J2ME. Is there an android counterpart for that. Does android provide an option to set such tiled patterns in the layout XML?
When following the Android Open Source Project instructions on installing repo for use with Git, after running the repo init command, I run into this error: /c/Users/Andrew Rabon/bin/repo: line ...
I read in the Android documentation that by setting my Activity s launchMode property to singleTop OR by adding the FLAG_ACTIVITY_SINGLE_TOP flag to my Intent, that calling startActivity(intent) would ...
I have pretty good skills in PHP , Mysql and Javascript for a junior developer. If I wanted to try my hand as Android Development do you think I might find it tough ? Also what new languages would I ...