0
我有问题的列表视图中的研究背景从FUNC改变创建自定义布局(背景)
ListView控件通过JSON encdoe接收来自URL的数据一样,/更新的ListView:
{"results":[
{"db_id":"6","discount":"active","db_description":"bla bla bla ","db_num":"137","db_num2":"260"},
{"db_id":"14","db_type":"discount","db_description":"blaaaaaaa","db_num":"39","db_num2":"46"},
{"db_id":"18","db_type":"discount","db_description":"blaaaaaaa","db_num":"335","db_num2":"456"},
]}
我的代码:
ListAdapter adapter = new SimpleAdapter(
QueueActivity.this, QueueList,
R.layout.queue_row, new String[] { TAG_ID, TAG_DESCRIPTION, TAG_NUM, TAG_NUM2, TAG_IMAGE},
new int[] { R.id.qid, R.id.description, R.id.num, R.id.num2, R.id.list_image });
setListAdapter(adapter);
onListItemClick我可以通过Simplay更新背景
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
v.setBackgroundResource(R.drawable.listview_taken_background);
TextView textid = (TextView) v.findViewById(R.id.queueid);
textid.setText("NEW TEXT")
}
但我需要更新从一个func的背景以及 我该怎么做?
for ex,命令new FuncName()。execute(“2”);将用于第二排的底色资源设置为“R.drawable.listview_taken_background”
查看listView = getListView()。getChildAt(0); listView.setBackgroundResource(R.drawable.listview_taken_background);我得到NullPointException – Kirma
你确定在填充ListView后调用这个吗? –
是100%。该函数在setListAdapter(adapter)之后被调用; – Kirma