我有一個按鈕和一個微調(最初隱藏)。當用戶按下按鈕時,微調器會填充項目並變得可見。現在我想將OnItemSelectedListener添加到微調器。我已經嘗試了許多教程,但沒有運氣。將OnItemSelectedListener添加到Spinner中
這是我的OnCreate函數
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button load_routes = (Button)findViewById(R.id.load_routes);
Spinner routes = (Spinner)findViewById(R.id.routes_list);
load_routes.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
load_routes(v);
}
});
routes.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
public void onItemSelected(AdapterView<?> arg0, View v, int position, long id)
{
Log.v("routes", "route selected");
}
public void onNothingSelected(AdapterView<?> arg0)
{
Log.v("routes", "nothing selected");
}
});
}
這是我load_routes功能
private void load_routes(View v)
{
Spinner routes = (Spinner)findViewById(R.id.routes_list);
List<String> routes_list = RouteParser.get_routes();
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, routes_list);
routes.setAdapter(adapter);
TableRow list_of_routes_row = (TableRow)findViewById(R.id.list_of_routes_row);
list_of_routes_row.setVisibility(View.VISIBLE);
}
此設置不起作用。我得到這個工作的唯一方法是當我設置我的聽衆爲routes.setOnItemSelectedListener(this)
然後我執行OnItemSelectedListener
幷包括功能需求。但我擁有多個spinners,需要爲不同的微調創建單獨的監聽器。任何幫助將不勝感激。謝謝!
爲什麼你要在load_routes()函數中再次查看routes_list? – 2012-04-04 10:44:38