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我无法刷新微调器项目选择的列表视图 .
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我想根据微调器的项值构建新的url来获取新的json数据并转换为listview .
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你也可以帮我告诉我如何创建一个方法来传递新的url来获取新数据 .
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主要问题与 Headers 相同您的每一个帮助将不胜感激 .
@Override public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState){//为此片段扩展布局View view = inflater.inflate(R.layout.fragment1,container,false);
String [] array_values = {"All "," 5"," 4"," 3"," 2"," 1"};
final Spinner spinner = view.findViewById(R.id.spinner);
final ArrayAdapter<String> spinner_adapter = new ArrayAdapter<>(this.getActivity(), android.R.layout.simple_spinner_item, array_values);
spinner_adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner.setAdapter(spinner_adapter);
final String spinnerValue = spinner.getSelectedItem().toString();
url = "http://website.com/demo.php?pswd=kvpswd";
listView = (ListView) view.findViewById(R.id.demo_list_view);
adapter = new CustomListAdapter(this.getActivity(), List);
listView.setAdapter(adapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
// listView.setAdapter(null);
String spinnerValue = spinner.getSelectedItem().toString();
url = "http://website.com/demo.php?pswd="+spinnerValue;
adapter.notifyDataSetChanged();
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
// Creating volley request obj
JsonArrayRequest Requset = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
hidePDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
DataFetcher datafetcher = new DataFetcher();
datafetcher.set1(obj.getString("item1"));
datafetcher.set2(obj.getString("item2"));
datafetcher.set3(obj.getString("item3"));
datafetcher.set4(obj.getString("item4"));
datafetcher.set5(obj.getString("item5"));
datafetcher.set6(obj.getString("item6"));
datafetcher.set7(obj.getString("item7"));
datafetcher.set8(obj.getString("item8"));
// adding list to list array
List.add(datafetcher);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
}
1 回答
为api调用make方法并传递url并将数据设置为列表视图 . 下面的方法进入微调器选择时间 .
并为适配器设置制作一个单独的方法 .