我正在开发一个活动应用，需要能够在发生的月份之前整理我的活动。我打算使用“菜单”按钮显示可供选择的月份列表。我尝试使用Collections.sort但Eclipse不允许使用HashMap String，String。我怎样才能让这堂课只在七月举办活动？
公共类Schedule扩展了ListActivity {
protected EditText searchText;
protected SQLiteDatabase db;
protected Cursor cursor;
protected TextView textView;
protected ImageView imageView;
protected ArrayList<HashMap<String, String>> myList;
protected ImageLoader imageLoader;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.schedule);
View layout = findViewById(R.id.gradiant);
GradientDrawable gd = new GradientDrawable(
GradientDrawable.Orientation.TOP_BOTTOM, new int[] {
0xFF95B9C7, 0xFF06357A });
gd.setCornerRadius(2f);
layout.setBackgroundDrawable(gd);
new GetEventsTask().execute("word");
}
public void featured(View view) {
startActivity(new Intent(getApplicationContext(), Featured.class));
}
public void schedule(View view) {
}
public void venue(View view) {
startActivity(new Intent(getApplicationContext(), Venues.class));
}
public void share(View view) {
startActivity(new Intent(getApplicationContext(), Friends.class));
}
public void myravinia(View view) {
startActivity(new Intent(getApplicationContext(), Account.class));
}
protected class GetEventsTask extends
AsyncTask<String, Integer, ArrayList<HashMap<String, String>>> {
protected ArrayList<HashMap<String, String>> threadList;
private final ProgressDialog dialog = new ProgressDialog(Schedule.this);
protected void onPreExecute() {
this.dialog.setMessage("Loading...");
this.dialog.setCancelable(false);
this.dialog.show();
}
@Override
protected ArrayList<HashMap<String, String>> doInBackground(
String... params) {
Log.v("Yup", "The thread is running");
threadList = new ArrayList<HashMap<String, String>>();
JSONObject json = JSONfunctions
.getJSONfromURL("my.jason.feed.url");
try {
JSONArray current = json.getJSONArray("d");
for (int i = 0; i < current.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject e = current.getJSONObject(i);
map.put("id", String.valueOf(i));
map.put("showid", "" + Html.fromHtml(e.getString("ShowID")));
map.put("name", "" + Html.fromHtml(e.getString("Title")));
map.put("showvenue", "" + e.getString("ShowVenue"));
map.put("subtitle",
"" + Html.fromHtml(e.getString("SubTitle")));
map.put("venueid", "" + e.getString("VenueID"));
String showDate = e.getString("ShowDate");
long epoch = Long.parseLong(showDate);
Date showDatePresent = new Date(epoch * 1000);
SimpleDateFormat sdf = new SimpleDateFormat("E, MMMM d");
String dateOfShow = sdf.format(showDatePresent);
map.put("showdate", "" + dateOfShow);
String showStart = e.getString("ShowStart");
long epoch2 = Long.parseLong(showStart);
Date showTimePresent = new Date(epoch2 * 1000);
SimpleDateFormat sdf2 = new SimpleDateFormat("h:mm a");
String timeOfShow = sdf2.format(showTimePresent);
map.put("showstart", "" + timeOfShow);
String showEnd = e.getString("ShowEnd");
long epoch3 = Long.parseLong(showEnd);
Date showEndPresent = new Date(epoch3 * 1000);
SimpleDateFormat sdf3 = new SimpleDateFormat("h:mm a");
String endOfShow = sdf3.format(showEndPresent);
map.put("showend", "" + endOfShow);
String gatesOpen = e.getString("GatesOpen");
long epoch4 = Long.parseLong(gatesOpen);
Date gatesOpenPresent = new Date(epoch4 * 1000);
SimpleDateFormat sdf4 = new SimpleDateFormat(
"'Gates open: 'h:mm a");
String gatesAreOpen = sdf4.format(gatesOpenPresent);
map.put("gatesopen", "" + gatesAreOpen);
map.put("aboutartist", "" + e.getString("AboutArtist"));
map.put("program",
"" + Html.fromHtml(e.getString("Program")));
map.put("programnotes",
"" + Html.fromHtml(e.getString("ProgramNotes")));
map.put("pricing",
"" + Html.fromHtml(e.getString("Pricing")));
map.put("featuring", "" + e.getString("Featuring"));
map.put("parkdetails", "" + e.getString("ParkDetails"));
map.put("starred", "" + e.getString("Starred"));
map.put("image500", "" + e.getString("Image500"));
map.put("image250", "" + e.getString("Image250"));
map.put("aboutartist",
"" + Html.fromHtml(e.getString("AboutArtist")));
threadList.add(map);
}
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
return threadList;
}
protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
myList = new ArrayList<HashMap<String, String>>();
myList = result;
LazyAdapter adapter = new LazyAdapter(Schedule.this, myList);
setListAdapter(adapter);
final ListView lv = getListView();
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
HashMap<String, String> hashMap = myList.get(position);
// hashMap.put("map", hashMap);
Intent intent = new Intent(getApplicationContext(),
ArtistDetails.class);
intent.putExtra("map", hashMap);
startActivity(intent);
}
});
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
}
}
}
我知道我将代码留在那里以获得对此任务不重要的功能，但努力做到详细... 如果我有任何其他细节可以帮助我解决这个问题，请告诉我。干杯！
我的2个适配器：
public class LazyAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
public LazyAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data=d;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.line_item, null);
TextView name = (TextView)vi.findViewById(R.id.title); // title
TextView showdate = (TextView)vi.findViewById(R.id.showdate); // showdate
TextView showstart = (TextView)vi.findViewById(R.id.showstart); // showstart
TextView showvenue = (TextView)vi.findViewById(R.id.showvenue); // showstart
ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image
// Setting all values in listview
name.setText(data.get(position).get("name"));
showdate.setText(data.get(position).get("showdate"));
showstart.setText(data.get(position).get("showstart"));
showvenue.setText(data.get(position).get("showvenue"));
imageLoader.DisplayImage(data.get(position).get("image250"), thumb_image);
return vi;
}
}
和
public class JSONfunctions {
public static JSONObject getJSONfromURL(String url){
InputStream is = null;
String result = "";
JSONObject jArray = null;
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
try{
jArray = new JSONObject(result);
}catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
}
return jArray;
}
}