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我有問題的列表視圖中的研究背景從FUNC改變創建自定義佈局(背景)
ListView控件通過JSON encdoe接收來自URL的數據一樣,/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"},
]}
我的代碼:
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我可以通過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")
}
但我需要更新從一個func的背景以及 我該怎麼做?
for ex,命令new FuncName()。execute(「2」);將用於第二排的底色資源設置爲「R.drawable.listview_taken_background」
查看listView = getListView()。getChildAt(0); listView.setBackgroundResource(R.drawable.listview_taken_background);我得到NullPointException – Kirma
你確定在填充ListView後調用這個嗎? –
是100%。該函數在setListAdapter(adapter)之後被調用; – Kirma