如何排序＆amp; Android中的群组？
我有ArrayList，我想按Android中的标题对所有数据进行排序和分组。 如何在Android中实现？请帮助我。让我从所有者和设置标题我和乔经理从所有者和设置列表视图中的标题。如何在Android中执行此操作？
我的代码在下面::
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;
}
}
}
4 个答案:
答案 0 :(得分：1)
你可以为每个类别制作单独的列表，并列出这些列表，并为类别名称制作另一个列表，而不是使用ExpandableListView和Adapter，就像下面这样。在这个示例中，它使用的是二维数组，您可以将其替换为您的列表。
public class ExpAdapter extends BaseExpandableListAdapter {
private Context myContext;
String[][] arrChildelements;
String[] arrGroup;
public ExpAdapter(Context context, String[] arrGroup, String[][] arrChild) {
myContext = context;
this.arrGroup = arrGroup;
this.arrChildelements = arrChild;
}
public Object getChild(int groupPosition, int childPosition) {
return null;
}
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
public int getChildrenCount(int groupPosition) {
return arrChildelements[groupPosition].length;
}
public Object getGroup(int groupPosition) {
return null;
}
public int getGroupCount() {
return arrGroup.length;
}
public long getGroupId(int groupPosition) {
return 0;
}
public boolean hasStableIds() {
return false;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.group_row, null);
}
TextView tvGroupName = (TextView) convertView
.findViewById(R.id.tvGroupName);
tvGroupName.setText(arrGroup[groupPosition]);
return convertView;
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.child_row, null);
}
TextView tvPlayerName = (TextView) convertView
.findViewById(R.id.tvPlayerName);
tvPlayerName.setText(arrChildelements[groupPosition][childPosition]);
return convertView;
}
}
答案 1 :(得分：0)
你必须写下你自己的Adapter。例如，您可以扩展BaseAdapter并覆盖以下方法：
-
getCount()它将返回数据集中的项目数 -
getView()它会让您的视图膨胀 -
getItemViewType()获取将由getView（）（示例中的组元素Baroque / Classic）或“普通”项创建的View类型。 -
getViewTypeCount ()您拥有的观看类型的数量。
答案 2 :(得分：0)
我不确定，但如果您尝试缩短列表，请尝试使用此字符串
public void sort(List<arraylist> itemLocationList) {
if(itemLocationList!=null)
{
Collections.sort(itemLocationList, new Comparator<arraylist>() {
@Override
public int compare(list o1, list o2) {
return o1.res_name.compareToIgnoreCase(o2.res_name);
}
});
}
}
答案 3 :(得分：0)
我的问题解决了。谢谢Jignesh !!!
public class Request extends Activity {
private String assosiatetoken;
private ArrayList<All_Request_data_dto> list = new ArrayList<All_Request_data_dto>();
ListView lv;
ExpandableListView exlistView;
ArrayList<String> catOwner = new ArrayList<String>();
ArrayList<String> uniCatOner = new ArrayList<String>();
ArrayList<ArrayList<All_Request_data_dto>> masterOwner = new ArrayList<ArrayList<All_Request_data_dto>>();
ArrayList<String> catState = new ArrayList<String>();
ArrayList<String> uniCatState = new ArrayList<String>();
ArrayList<ArrayList<All_Request_data_dto>> masterState = new ArrayList<ArrayList<All_Request_data_dto>>();
Button back;
private Spinner spndata;
String[] reqspinner = { "Request Date", "Last Update", "Type", "Owner",
"State" };
ArrayAdapter<String> adapter;
ExpAdapter expAdapter;
private void setOwner() {
for (int i = 0; i < list.size(); i++) {
catOwner.add(list.get(i).owner);
}
HashSet<String> hasSetstate = new HashSet<String>(catOwner);
uniCatOner = new ArrayList<String>(hasSetstate);
for (String str : uniCatOner) {
ArrayList<All_Request_data_dto> cats = new ArrayList<All_Request_data_dto>();
masterOwner.add(cats);
}
for (int i = 0; i < list.size(); i++) {
for (int j = 0; j < uniCatOner.size(); j++) {
if (uniCatOner.get(j).equals(list.get(i).owner)) {
masterOwner.get(j).add(list.get(i));
}
}
}
}
private void setState() {
for (int i = 0; i < list.size(); i++) {
catState.add(list.get(i).state);
}
HashSet<String> hasSetstate = new HashSet<String>(catState);
uniCatState = new ArrayList<String>(hasSetstate);
for (String str1 : uniCatState) {
ArrayList<All_Request_data_dto> cats = new ArrayList<All_Request_data_dto>();
masterState.add(cats);
}
for (int i = 0; i < list.size(); i++) {
for (int j = 0; j < uniCatState.size(); j++) {
if (uniCatState.get(j).equals(list.get(i).state)) {
masterState.get(j).add(list.get(i));
}
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.request);
assosiatetoken = MyApplication.getToken();
list = DBAdpter.requestUserData(assosiatetoken);
exlistView = (ExpandableListView) findViewById(R.id.ExpList);
setOwner();
setState();
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);
exlistView.setFocusable(false);
// 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);
exlistView.setVisibility(View.GONE);
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);
exlistView.setVisibility(View.GONE);
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:
lv.setVisibility(View.GONE);
expAdapter = new ExpAdapter(Request.this, uniCatOner,
masterOwner);
exlistView.setAdapter(expAdapter);
break;
case 4:
lv.setVisibility(View.GONE);
expAdapter = new ExpAdapter(Request.this, uniCatState,
masterState);
exlistView.setAdapter(expAdapter);
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;
}
}
}
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