我在做什么 ::
Hashmap对象
一个接一个到ArrayList对象并在日志中打印发生了什么 ::
我可以逐个移动光标并将数据放入HashMap
因此，hashmap对象中添加了5个ArryList个对象
反过来ArrayList有5行，但hashmap对象的最后一个条目在所有行中被替换，所以
前 ::
HashMap包含对象1,2,3,4,5 ArrayList有5,5,5,5,5而不是它
应该是1,2,3,4,5 请检查logcat <-->ArrayListObject<-->多次使用相同的条目，即使我的hashmap对象有不同的条目，我该如何解决这个问题，我是在为arraylist添加值时犯了一些错误，我该如何纠正自己
mFragSortingHome.java
public class mFragSortingHome extends SherlockListFragment implements View.OnTouchListener {
Button ratingButtonId,priceButtonId,distanceButtonId;
String queryString;
ArrayList<HashMap<String, String>> arrayListBuffet=new ArrayList<HashMap<String,String>>();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view=inflater.inflate(R.layout.fragment1, container, false);
//Setting the NavigationTag from AppControllerApplication class
AppController.CURRENT_FRAGMENT="mFragSortingHome";
setRetainInstance(true);
return view;
}
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if (keyCode == KeyEvent.KEYCODE_BACK)
{
WillYouQuitAppDialog();
}
return false;
}
public void WillYouQuitAppDialog(){
//GPS-Dialog
WillYouQuitAppDialog quitAlert;
try {
quitAlert = new WillYouQuitAppDialog();
quitAlert.show(getActivity().getSupportFragmentManager(), "GpsAlert_Tag");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
ratingButtonId=(Button) getActivity().findViewById(R.id.ratingButtonId);
priceButtonId=(Button) getActivity().findViewById(R.id.priceButtonId);
distanceButtonId=(Button) getActivity().findViewById(R.id.distanceButtonId);
ratingButtonId.setOnTouchListener(this);
priceButtonId.setOnTouchListener(this);
distanceButtonId.setOnTouchListener(this);
//getFragmentManager().beginTransaction().replace(R.id.sortBodyContainerId, FragSortParentViewAsList.newInstance("FragRatingAscendingListTag"), "FragRatingAscendingListTag").addToBackStack(null).commit();
ratingButtonId.setBackgroundResource(R.drawable.tab_button_pressed);
priceButtonId.setBackgroundResource(R.drawable.tab_button_default);
distanceButtonId.setBackgroundResource(R.drawable.tab_button_default);
CharSequence styledItemName1,styledItemName2,styledItemName3;
styledItemName1=setMultiStylingSpan("(ASC)",new ForegroundColorSpan(Color.parseColor("#00aeef")));
styledItemName1=TextUtils.concat(ratingButtonId.getText()+"\n",setMultiStylingSpan(styledItemName1,new RelativeSizeSpan(0.6f)));
ratingButtonId.setText(styledItemName1);
styledItemName2=setMultiStylingSpan("(DESC)",new ForegroundColorSpan(Color.parseColor("#00aeef")));
styledItemName2=TextUtils.concat(priceButtonId.getText()+"\n",setMultiStylingSpan(styledItemName2,new RelativeSizeSpan(0.6f)));
priceButtonId.setText(styledItemName2);
styledItemName3=setMultiStylingSpan("(DESC)",new ForegroundColorSpan(Color.parseColor("#00aeef")));
styledItemName3=TextUtils.concat(distanceButtonId.getText()+"\n",setMultiStylingSpan(styledItemName3,new RelativeSizeSpan(0.6f)));
distanceButtonId.setText(styledItemName3);
}
@Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
new LoadNextPage().execute();
FragmentAdapter adapter=new FragmentAdapter(getActivity(),R.layout.display_buffet_adapater, arrayListBuffet);
setListAdapter(adapter);
}
protected class LoadNextPage extends AsyncTask<Integer, Void, Integer>{
@Override
protected Integer doInBackground(Integer... arg0){
/// dA=new DatabaseAdapter(getActivity());
DatabaseHandler mHelper = new DatabaseHandler(getActivity().getApplicationContext());
SQLiteDatabase db = mHelper.getWritableDatabase();
String selectQuery = "SELECT * FROM buffets";
Cursor cursor = db.rawQuery(selectQuery, null);
HashMap<String, String> mapObj = new HashMap<String, String>();
///
try {
cursor.moveToFirst();
if(cursor.moveToFirst()){
do{
mapObj.put("buf_off_id", cursor.getString(1));
mapObj.put("from_time", cursor.getString(2));
mapObj.put("to_time", cursor.getString(3));
mapObj.put("online_price", cursor.getString(4));
mapObj.put("reserved_price", cursor.getString(5));
mapObj.put("buf_image", cursor.getString(6));
mapObj.put("res_name", cursor.getString(7));
mapObj.put("rating", cursor.getString(8));
mapObj.put("latitude", cursor.getString(9));
mapObj.put("longitude", cursor.getString(10));
mapObj.put("buf_type_name", cursor.getString(11));
mapObj.put("from_date", cursor.getString(12));
mapObj.put("to_date", cursor.getString(13));
mapObj.put("city_id", cursor.getString(14));
mapObj.put("city_name", cursor.getString(15));
mapObj.put("meal_type_id", cursor.getString(16));
mapObj.put("meal_type_name", cursor.getString(17));
mapObj.put("distance", cursor.getString(18));
mapObj.put("buf_desc", cursor.getString(19));
Log.d("<-->MapObject<-->", mapObj.toString());
arrayListBuffet.add(mapObj);//Add to arraylist onject(One row i each iteration)
}while(cursor.moveToNext());
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
db.close();
}
//cursor.close();
Log.d("<-->ArrayListObject<-->", arrayListBuffet.toString());
return null;
}
@Override
protected void onPostExecute(Integer offset){
}
}
//Detecting onTouch for the tabButtons
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if(v.getId()==R.id.ratingButtonId)
{
ratingButtonId.setBackgroundResource(R.drawable.tab_button_pressed);
priceButtonId.setBackgroundResource(R.drawable.tab_button_default);
distanceButtonId.setBackgroundResource(R.drawable.tab_button_default);
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN:
{
ratingButtonId.setBackgroundResource(R.drawable.tab_button_focus);
//v.setBackgroundResource(R.drawable.buttonpressed);
if(AppController.RATING_LIST_FLAG==false){
//getFragmentManager().beginTransaction().replace(R.id.sortBodyContainerId, FragSortParentViewAsList.newInstance("FragRatingDescendingListTag"), "FragRatingDescendingListTag").addToBackStack(null).commit();
queryString="SELECT * FROM buffets ORDER BY rating DESC";
AppController.RATING_LIST_FLAG=true;
}else{
//getFragmentManager().beginTransaction().replace(R.id.sortBodyContainerId, FragSortParentViewAsList.newInstance("FragRatingAscendingListTag"), "FragRatingAscendingListTag").addToBackStack(null).commit();
queryString="SELECT * FROM buffets ORDER BY rating ASC";
AppController.RATING_LIST_FLAG=false;
}
v.invalidate();
break;
}
case MotionEvent.ACTION_UP:
{
ratingButtonId.setBackgroundResource(R.drawable.tab_button_pressed);
v.invalidate();
break;
}
}
}else if(v.getId()==R.id.priceButtonId){
ratingButtonId.setBackgroundResource(R.drawable.tab_button_default);
priceButtonId.setBackgroundResource(R.drawable.tab_button_pressed);
distanceButtonId.setBackgroundResource(R.drawable.tab_button_default);
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN:
{
priceButtonId.setBackgroundResource(R.drawable.tab_button_focus);
//v.setBackgroundResource(R.drawable.buttonpressed);
if(AppController.PRICE_LIST_FLAG==false){
//getFragmentManager().beginTransaction().replace(R.id.sortBodyContainerId, FragSortParentViewAsList.newInstance("FragPriceAscendingListTag"), "FragPriceAscendingListTag").addToBackStack(null).commit();
queryString="SELECT * FROM buffets ORDER BY online_price ASC";
AppController.PRICE_LIST_FLAG=true;
}else{
//getFragmentManager().beginTransaction().replace(R.id.sortBodyContainerId, FragSortParentViewAsList.newInstance("FragPriceDescendingListTag"), "FragPriceDescendingListTag").addToBackStack(null).commit();
queryString="SELECT * FROM buffets ORDER BY online_price DESC";
AppController.PRICE_LIST_FLAG=false;
}
v.invalidate();
break;
}
case MotionEvent.ACTION_UP:
{
priceButtonId.setBackgroundResource(R.drawable.tab_button_pressed);
//v.setBackgroundResource(R.drawable.buttonnormal);
v.invalidate();
break;
}
}
}else if(v.getId()==R.id.distanceButtonId) {
ratingButtonId.setBackgroundResource(R.drawable.tab_button_default);
priceButtonId.setBackgroundResource(R.drawable.tab_button_default);
distanceButtonId.setBackgroundResource(R.drawable.tab_button_pressed);
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN:
{
distanceButtonId.setBackgroundResource(R.drawable.tab_button_focus);
//v.setBackgroundResource(R.drawable.buttonpressed);
if(AppController.DISTANCE_LIST_FLAG==false){
//getFragmentManager().beginTransaction().replace(R.id.sortBodyContainerId, FragSortParentViewAsList.newInstance("FragDistanceAscendingListTag"), "FragDistanceAscendingListTag").addToBackStack(null).commit();
queryString="SELECT * FROM buffets ORDER BY distance ASC";
AppController.DISTANCE_LIST_FLAG=true;
}else{
//getFragmentManager().beginTransaction().replace(R.id.sortBodyContainerId, FragSortParentViewAsList.newInstance("FragDistanceDescendingListTag"), "FragDistanceDescendingListTag").addToBackStack(null).commit();
queryString="SELECT * FROM buffets ORDER BY distance DESC";
AppController.DISTANCE_LIST_FLAG=false;
}
v.invalidate();
break;
}
case MotionEvent.ACTION_UP:
{
distanceButtonId.setBackgroundResource(R.drawable.tab_button_pressed);
v.invalidate();
break;
}
}
}
return false;
}
public static CharSequence setMultiStylingSpan(CharSequence text, CharacterStyle... cs){
SpannableStringBuilder ssb = new SpannableStringBuilder(text);
for (CharacterStyle c : cs){
ssb.setSpan(c, 0, text.length(), 0);
}
text = ssb;
return text;
}
}
日志 ::
05-11 15:31:25.941: D/<-->MapObject<-->(554): {city_name=bangalore, buf_type_name=indian, online_price=100, buf_desc=Dilicious food offered, meal_type_id=1, meal_type_name=breakfast, from_date=2013-12-31T18:30:00.000Z, city_id=1, distance=16, res_name=sherton, reserved_price=150, from_time=07:00:00, buf_image=indian_breakfast_sherton.jpg, to_date=2014-03-30T18:30:00.000Z, longitude=77.5554, latitude=13.0127, rating=2, to_time=12:00:00, buf_off_id=1}
05-11 15:31:26.139: D/<-->MapObject<-->(554): {city_name=bangalore, buf_type_name=chinese/thai, online_price=400, buf_desc=Dilicious food offered, meal_type_id=2, meal_type_name=lunch, from_date=2013-12-31T18:30:00.000Z, city_id=1, distance=16, res_name=sherton, reserved_price=100, from_time=12:00:00, buf_image=chinese_lunch_sherton.jpg, to_date=2014-06-29T18:30:00.000Z, longitude=77.5554, latitude=13.0127, rating=2, to_time=16:00:00, buf_off_id=2}
05-11 15:31:26.419: D/<-->MapObject<-->(554): {city_name=bangalore, buf_type_name=chinese/indian/thai, online_price=1500, buf_desc=Dilicious food offered, meal_type_id=3, meal_type_name=dinner, from_date=2013-12-31T18:30:00.000Z, city_id=1, distance=16, res_name=sherton, reserved_price=2500, from_time=12:00:00, buf_image=indian_dinner_sherton.jpg, to_date=2012-12-30T18:30:00.000Z, longitude=77.5554, latitude=13.0127, rating=2, to_time=16:00:00, buf_off_id=3}
05-11 15:31:26.469: D/<-->MapObject<-->(554): {city_name=pune, buf_type_name=rajastani, online_price=345, buf_desc=Food Served Here, meal_type_id=3, meal_type_name=dinner, from_date=2013-12-31T18:30:00.000Z, city_id=4, distance=5, res_name=leela palace, reserved_price=400, from_time=20:00:00, buf_image=rajastani_dinner_leela_palace.jpg, to_date=2014-05-30T18:30:00.000Z, longitude=77.6484, latitude=12.9617, rating=2.5, to_time=23:00:00, buf_off_id=5}
05-11 15:31:26.569: D/<-->MapObject<-->(554): {city_name=washington, buf_type_name=indian, online_price=400, buf_desc=Unique food With Taste, meal_type_id=2, meal_type_name=lunch, from_date=2013-12-31T18:30:00.000Z, city_id=3, distance=9, res_name=novotel, reserved_price=600, from_time=13:00:00, buf_image=indian_lunch_novotel.jpg, to_date=2014-05-30T18:30:00.000Z, longitude=77.607, latitude=12.9751, rating=4.5, to_time=16:00:00, buf_off_id=4}
05-11 15:31:26.799: D/dalvikvm(554): GC_CONCURRENT freed 245K, 6% free 8146K/8583K, paused 6ms+9ms
05-11 15:31:26.839: D/<-->ArrayListObject<-->(554): [{city_name=washington, buf_type_name=indian, online_price=400, buf_desc=Unique food With Taste, meal_type_id=2, meal_type_name=lunch, from_date=2013-12-31T18:30:00.000Z, city_id=3, distance=9, res_name=novotel, reserved_price=600, from_time=13:00:00, buf_image=indian_lunch_novotel.jpg, to_date=2014-05-30T18:30:00.000Z, longitude=77.607, latitude=12.9751, rating=4.5, to_time=16:00:00, buf_off_id=4}, {city_name=washington, buf_type_name=indian, online_price=400, buf_desc=Unique food With Taste, meal_type_id=2, meal_type_name=lunch, from_date=2013-12-31T18:30:00.000Z, city_id=3, distance=9, res_name=novotel, reserved_price=600, from_time=13:00:00, buf_image=indian_lunch_novotel.jpg, to_date=2014-05-30T18:30:00.000Z, longitude=77.607, latitude=12.9751, rating=4.5, to_time=16:00:00, buf_off_id=4}, {city_name=washington, buf_type_name=indian, online_price=400, buf_desc=Unique food With Taste, meal_type_id=2, meal_type_name=lunch, from_date=2013-12-31T18:30:00.000Z, city_id=3, distance=9, res_name=novotel, reserved_price=600, from_time=13:00:00, buf_image=indian_lunch_novotel.jpg, to_date=2014-05-30T18:30:00.000Z, longitude=77.607, latitude=12.9751, rating=4.5, to_time=16:00:00, buf_off_id=4}, {city_name=washington, buf_type_name=indian, online_price=400, buf_desc=Unique food With Taste, meal_type_id=2, meal_type_name=lunch, from_date=2013-12-31T18:30:00.000Z, city_id=3, distance=9, res_name=novotel, reserved_price=600, from_time=13:00:00, buf_image=indian_lunch_novotel.jpg, to_date=2014-05-30T18:30:00.000Z, longitude=77.607, latitude=12.9751, rating=4.5, to_time=16:00:00, buf_off_id=4}, {city_name=washington, buf_type_name=indian, online_price=400, buf_desc=Unique food With Taste, meal_type_id=2, meal_type_name=lunch, from_date=2013-12-31T18:30:00.000Z, city_id=3, distance=9, res_name=novotel, reserved_price=600, from_time=13:00:00, buf_image=indian_lunch_novotel.jpg, to_date=2014-05-30T18:30:00.000Z, longitude=77.607, latitude=12.9751, rating=4.5, to_time=16:00:00, buf_off_id=4}]
答案 0 :(得分：4)
每次在do-while循环中使用相同的对象，从而覆盖其值。
HashMap<String, String> mapObj = new HashMap<String, String>(); //
try {
cursor.moveToFirst();
if(cursor.moveToFirst()){
do{
mapObj.put("buf_off_id", cursor.getString(1));
//...
arrayListBuffet.add(mapObj);//Add to arraylist onject(One row i each iteration)
}while(cursor.moveToNext());
您应该在每次迭代开始时创建一个新地图。
try {
cursor.moveToFirst();
if(cursor.moveToFirst()){
do{
HashMap<String, String> mapObj = new HashMap<String, String>();
mapObj.put("buf_off_id", cursor.getString(1));
//...
arrayListBuffet.add(mapObj);//Add to arraylist onject(One row i each iteration)
}while(cursor.moveToNext());