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我有ArrayList，我想在Android中按照標題對所有數據進行排序和分組。 在Android中如何可能？請幫助我。從業主低於我並設置標題我和喬經理從所有者並在列表視圖中設置標題。如何在Android中做到這一點？如何在Android中進行排序＆分組？
我在下面的代碼::
public class Request extends Activity {
private String assosiatetoken;
private ArrayList<All_Request_data_dto> list = new ArrayList<All_Request_data_dto>();
ListView lv;
Button back;
private Spinner spndata;
String[] reqspinner = { "Request Date", "Last Update", "Type", "Owner",
"State" };
ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.request);
assosiatetoken = MyApplication.getToken();
new doinbackground(this).execute();
back = (Button) findViewById(R.id.button1);
spndata = (Spinner) findViewById(R.id.list_all_quize_req);
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, reqspinner);
spndata.setAdapter(adapter);
lv = (ListView) findViewById(R.id.listrequestdata);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> a, View v, int position,
long id) {
Intent edit = new Intent(Request.this, Request_webview.class);
// edit.putExtra("Cat_url", url_link);
startActivity(edit);
}
});
spndata.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long arg3) {
switch (position) {
case 0:
list = DBAdpter.requestUserData(assosiatetoken);
Collections.sort(list, byDate1);
// Collections.reverse(list);
for (int i = 0; i < list.size(); i++) {
if (list.get(i).submitDate != null) {
lv.setAdapter(new MyListAdapter(
getApplicationContext(), list));
}
}
break;
case 1:
list = DBAdpter.requestUserData(assosiatetoken);
Collections.sort(list, byDate);
for (int i = 0; i < list.size(); i++) {
if (list.get(i).lastModifiedDate != null) {
lv.setAdapter(new MyListAdapter(
getApplicationContext(), list));
}
}
break;
case 2:
list = DBAdpter.requestUserData(assosiatetoken);
Collections.sort(list, byDate3);
// Collections.reverse(list);
for (int i = 0; i < list.size(); i++) {
if (list.get(i).state != null) {
lv.setAdapter(new MyListAdapter(
getApplicationContext(), list));
}
}
break;
case 3:
list = DBAdpter.requestUserData(assosiatetoken);
for (int i = 0; i < list.size(); i++) {
lv.setAdapter(new MyListAdapter(
getApplicationContext(), list));
}
break;
default:
break;
}
}
public void onNothingSelected(AdapterView<?> arg0) {
}
});
back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
}
static final Comparator<All_Request_data_dto> byDate = new Comparator<All_Request_data_dto>() {
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");
public int compare(All_Request_data_dto ord1, All_Request_data_dto ord2) {
java.util.Date d1 = null;
java.util.Date d2 = null;
try {
d1 = sdf.parse(ord1.lastModifiedDate);
d2 = sdf.parse(ord2.lastModifiedDate);
} catch (java.text.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return (d1.getTime() > d2.getTime() ? -1 : 1); // descending
// return (d1.getTime() > d2.getTime() ? 1 : -1); //ascending
}
};
static final Comparator<All_Request_data_dto> byDate1 = new Comparator<All_Request_data_dto>() {
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");
public int compare(All_Request_data_dto ord1, All_Request_data_dto ord2) {
java.util.Date d1 = null;
java.util.Date d2 = null;
try {
d1 = sdf.parse(ord1.submitDate);
d2 = sdf.parse(ord2.submitDate);
} catch (java.text.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return (d1.getTime() > d2.getTime() ? -1 : 1); // descending
// return (d1.getTime() > d2.getTime() ? 1 : -1); //ascending
}
};
static final Comparator<All_Request_data_dto> byDate3 = new Comparator<All_Request_data_dto>() {
public int compare(All_Request_data_dto ord1, All_Request_data_dto ord2) {
String d1 = null;
String d2 = null;
d1 = ord1.state;
d2 = ord2.state;
return d1.compareToIgnoreCase(d2);
}
};
class doinbackground extends AsyncTask<Void, Void, Void> {
ProgressDialog pd;
private Context ctx;
public doinbackground(Context c) {
ctx = c;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(ctx);
pd.setMessage("Loading...");
pd.show();
}
@Override
protected Void doInBackground(Void... Params) {
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
pd.cancel();
}
}
public class MyListAdapter extends BaseAdapter {
private ArrayList<All_Request_data_dto> list;
public MyListAdapter(Context mContext,
ArrayList<All_Request_data_dto> list) {
this.list = list;
}
public int getCount() {
return list.size();
}
public All_Request_data_dto getItem(int position) {
return list.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
// if (convertView == null) {
LayoutInflater inflator = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
convertView = inflator.inflate(R.layout.custom_request_data, null);
TextView req_id = (TextView) convertView.findViewById(R.id.req_txt);
TextView date = (TextView) convertView.findViewById(R.id.date_txt);
TextView owner = (TextView) convertView
.findViewById(R.id.owner_txt);
TextView state = (TextView) convertView
.findViewById(R.id.state_txt);
req_id.setText(list.get(position).requestId + " - "
+ list.get(position).title);
date.setText(list.get(position).lastModifiedDate + " - "
+ list.get(position).submitDate);
owner.setText(list.get(position).owner);
state.setText(list.get(position).state);
// }
return convertView;
}
}
}
查找節適配器。 – st0le