这是返回
List<String>item
[name1,name2,name3]
: 的 OnPostExecute
@Override
protected void onPostExecute(JSONObject json) {
try {
if (json.getString(KEY_SUCCESS) != null) {
String result = json.getString(KEY_SUCCESS);
if (Integer.parseInt(result) == 1) {
pDialog.setMessage("Loading View");
pDialog.setTitle("Getting Friends");
//JSONArray root = new JSONArray(json);
JSONArray friend = json.getJSONArray("users");
List<String> item = new ArrayList<String>();
for (int i = 0; i < friend.length(); i++) {
JSONObject att = (JSONObject) friend.getJSONObject(i);
String res = att.getString("username");
item.add(res);
}
SharedPreferences FriendList = getSharedPreferences("FriendList", Context.MODE_PRIVATE);
SharedPreferences.Editor edit = FriendList.edit();
edit.putString("KEY_FRIENDS", item.toString());
edit.commit();
} else {
pDialog.dismiss();
}
}else {
pDialog.dismiss();
}
} catch (JSONException e) {
e.printStackTrace();
}
pDialog.dismiss();
}
我想要它在列表视图中,但我被卡住了,因为我无法在
ListAdapter
中使用 OnPostExecute
。
public class FriendList extends ListActivity { ...
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_friend_list);
// listt = (TextView) findViewById(R.id.testyL);
// list = (TextView) findViewById(R.id.textView4);
// list = (ListView) findViewById(R.id.label);
try {
new GetFriends().execute();
}catch (Exception e) {
e.printStackTrace() ;
Log.e("ERR ", "AsyncTASK" + e.toString());
}
SharedPreferences FriendList = getSharedPreferences("FriendList", Context.MODE_PRIVATE);
String u = FriendList.getString("KEY_FRIENDS", "0");
我尝试将项目放入 SharedPref 但似乎我不知道如何正确检索它并与数组/列表适配器可以使用的变量相对应。
问题来了:)
// Binding resources Array to ListAdapter
this.setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, R.id.label, item ));
ListView lv = getListView();
// listening to single list item on click
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// selected item
String product = ((TextView) view).getText().toString();
// Launching new Activity on selecting single List Item
Intent i = new Intent(getApplicationContext(), Logged.class);
// sending data to new activity
i.putExtra("friend", product);
startActivity(i);
}
});
}
更改 GetFriends 构造函数添加对 FriendList 对象的引用:
try {
new GetFriends(FriendList.this).execute();
}catch (Exception e) {
e.printStackTrace() ;
Log.e("ERR ", "AsyncTASK" + e.toString());
}
班级:
public class GetFriends extends [...]{
private ListActivity mList;
public GetFriends(ListActivity list){
mList = list;
}
[...]
@Override
protected void onPostExecute(JSONObject json) {
//set Adapter to list
mList.
}
}