目前，我的列表视图显示了当前数据。在滑动时，它将从服务器加载旧数据并存储第一个旧数据和当前数据之后。在刷卡以刷新数据的同时在顶部加载服务器数据。它没有顶级的更新数据。帮我解决这个问题。每次加载数据都在上面。并在刷卡时从上到下刷新数据。
提前谢谢你。我在这里发布我的代码以供审核
public class CommmentActivity extends Activity{
String Curl;
boolean mBuzy;
String UserId;
String VidoId;
String strComment;
EditText etComment;
String mPositionId = "";
String strfriendsSyncDate;
ArrayAdapter<String> mentionList;
ListCommentAdapter commentAdapter;
AutoCompleteTextView aCompletView;
DatabaseHandler db = new DatabaseHandler(this);
List<CommentListInfo> list_CommentInfo = new ArrayList<CommentListInfo>();
ArrayList<MentionBeanClass> mList;
MentionBeanClass addMention;
List<String> SuggetionList;
ImageView IvAddComment;
ListView CommentList;
SessionCreator m_session;
boolean m = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.commentvideo_main);
SuggetionList = new ArrayList<String>();
Curl = GlobalMethod.TokenGenerator() + "&action=getCommentsVideo";
Intent data = getIntent();
UserId = data.getStringExtra("userId");
VidoId = data.getStringExtra("videoId");
init();
strfriendsSyncDate = m_session.getfriendsSyncDate();
new CommentsDetail().execute(UserId,VidoId,strfriendsSyncDate,mPositionId,Curl,"1");
ArratListBeans.setArMentionList(mList);
commentAdapter = new ListCommentAdapter(getApplicationContext(), list_CommentInfo);
CommentList.setAdapter(commentAdapter);
CommentList.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
switch (scrollState) {
case OnScrollListener.SCROLL_STATE_IDLE:{
Log.d("ScrollStateCheck", ""+scrollState);
break;
}
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
{
mBuzy = true;
int count = CommentList.getCount();
if(CommentList.getFirstVisiblePosition()==0){
CommentListInfo c;
c = (CommentListInfo) CommentList.getAdapter().getItem(CommentList.getFirstVisiblePosition());
mPositionId = c.CommentId;
Log.d("mpositionId", mPositionId);
String strUrl = GlobalMethod.TokenGenerator() + "&action=getCommentsVideo";
new CommentsDetail().execute(UserId,VidoId,strfriendsSyncDate,c.CommentId,strUrl,"1");
}
break;
}
case OnScrollListener.SCROLL_STATE_FLING:{
mBuzy = true;
break;
}
default:
break;
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub
}
});
IvAddComment.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
strComment = etComment.getText().toString();
etComment.getText().clear();
String strUrl = GlobalMethod.TokenGenerator() + "&action=addCommentsVideo";
new CommentsDetail().execute(UserId,VidoId,strComment,strUrl,"0");
new CommentsDetail().execute(UserId,VidoId,strfriendsSyncDate,Curl,"1");
commentAdapter.notifyDataSetChanged();
}
});
}
private void init() {
// TODO Auto-generated method stub
m_session = new SessionCreator(getApplicationContext());
etComment = (EditText)findViewById(R.id.etComments);
CommentList = (ListView)findViewById(R.id.lvLatestComments);
IvAddComment = (ImageView)findViewById(R.id.addComment);
mList = new ArrayList<MentionBeanClass>();
}
public class CommentsDetail extends AsyncTask<String, String, String>{
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
ServiceHandler serviceClient;
String mJsonString;
try{
String userId = (String)params[0];
String vId = (String)params[1];
String syncdate = (String)params[2];
String startPosition = (String)params[3];
String strUrl = (String)params[4];
List<NameValuePair> paramsNameValuePairs = new ArrayList<NameValuePair>();
paramsNameValuePairs.add(new BasicNameValuePair("userId", userId));
paramsNameValuePairs.add(new BasicNameValuePair("videoId", vId));
paramsNameValuePairs.add(new BasicNameValuePair("startFrom", startPosition));
paramsNameValuePairs.add(new BasicNameValuePair("friendsSyncDate", syncdate));
serviceClient = new ServiceHandler();
mJsonString = serviceClient.makeServiceCall(strUrl,
ServiceHandler.POST, paramsNameValuePairs);
Log.i("---->>>>>>>>>>", paramsNameValuePairs + "");
Log.d("Response Json-----------------------",mJsonString );
return mJsonString;
}catch (Exception e) {
e.getStackTrace();
}
return null;
}
@SuppressWarnings({ "unchecked", "unchecked", "unchecked" })
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
try{
if (result != null) {
JSONObject responsJsonObj = new JSONObject(result);
JSONObject jsonObj = (JSONObject) responsJsonObj
.optJSONObject("data");
try {
String str = jsonObj.getString("error");
if ( str != null || str.length() != 0) {
// error
//Toast.makeText(NewsfeedActivity.this, jsonObj.getString("error"),Toast.LENGTH_LONG).show();
return;
}
} catch (JSONException je) {
Log.d("jex ------>", "" + je.getMessage());
try {
String str = jsonObj.getString("message");
Log.d("message=", "" + str);
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("comments")) {
JSONArray colArray = jsonObj.getJSONArray("comments");
Log.d("Colunm Array", ""+colArray);
int nComments = colArray.length();
Log.d("# comments", "" + nComments);
for(int i=0; i<nComments; i++){
JSONObject obj = colArray.getJSONObject(i);
Gson Comments = new Gson();
String strComments = Comments.toJson(obj);
Log.d("# obj=", "" + obj.toString());
CommentListInfo cmtInfo = new CommentListInfo();
cmtInfo.c_userId = obj.getString("userId");
cmtInfo.c_name = obj.getString("name");
cmtInfo.DateAdded = obj.getString("dateAdded");
cmtInfo.CommentId = obj.getString("commentId");
cmtInfo.CommentText = obj.getString("text");
cmtInfo.ImageUrl = obj.getString("imageLink");
list_CommentInfo.add(cmtInfo);
}
}
}
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("addPosition")) {
Log.d("# obj=", "" + jsonObj.toString());
Log.d("Add Position", jsonObj.getString("addPosition"));
}
}
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("mentions")) {
JSONArray colArray = jsonObj.getJSONArray("mentions");
Log.d("Colunm Array", ""+colArray);
int nMention = colArray.length();
Log.d("# mentions", "" + nMention);
for(int i=0; i<nMention; i++){
JSONObject obj = colArray.getJSONObject(i);
Log.d("# obj=", "" + obj.toString());
mList.add(new MentionBeanClass(obj.getString("id"), obj.getString("name")));
Log.d("Mention Info", "Id : "+obj.getString("id")+" Name : "+obj.getString("name"));
}
}
}
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("videoUserData")) {
Log.d("# obj=", "" + jsonObj.toString());
Log.d("videoUserData"," "+ jsonObj.getString("videoUserData"));
}
}
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("friendsAdded")) {
JSONArray colArray = jsonObj.getJSONArray("friendsAdded");
String json = colArray.toString();
Log.d("Colunm Array", ""+colArray);
int nfriendsAdded = colArray.length();
Log.d("# friendsAdded", "" + nfriendsAdded);
for(int i=0; i<nfriendsAdded; i++){
JSONObject obj = colArray.getJSONObject(i);
Log.d("# obj=", "" + obj.toString());
String id = obj.getString("userId");
String name = obj.getString("name");
String imgUrl = obj.getString("imageLink");
db.addCustomer(new FriendListInfo(id, name, imgUrl));
}
}
}
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("friendsDeleted")) {
JSONArray colArray = jsonObj.getJSONArray("friendsDeleted");
Log.d("Colunm Array", ""+colArray);
int nfriendsDeleted = colArray.length();
Log.d("# friendsDeleted", "" + nfriendsDeleted);
for(int i=0; i<nfriendsDeleted; i++){
JSONObject obj = colArray.getJSONObject(i);
Log.d("# obj=", "" + obj.toString());
}
}else{
Log.d("Delete Friends", " No Deleted List");
}
}
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("friendsUpdated")) {
JSONArray colArray = jsonObj.getJSONArray("friendsUpdated");
Log.d("Colunm Array", ""+colArray);
int nfriendsUpdated = colArray.length();
Log.d("# friendsDeleted", "" + nfriendsUpdated);
for(int i=0; i<nfriendsUpdated; i++){
JSONObject obj = colArray.getJSONObject(i);
Log.d("# obj=", "" + obj.toString());
}
}else{
Log.d("Update Friends", " No Updated List");
}
}
if ( str != null || str.length() != 0) {
// VALID RESPONSE, NOW PARSE IT
if (jsonObj.has("friendsSyncDate")) {
Log.d("# friendsDeleted", "" + jsonObj);
Log.d("# obj=", "" + jsonObj.toString());
String myString = m_session.getfriendsSyncDate();
Log.d("myString", myString);
m_session.putfriendsSyncDate(jsonObj.getString("friendsSyncDate"));
Log.d("Sync Date "," "+jsonObj.getString("friendsSyncDate"));
}
}
} catch (JSONException je2) {
je2.printStackTrace();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
答案 0 :(得分：0)
添加adapter-listview更新代码
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
{
mBuzy = true;
int count = CommentList.getCount();
if(CommentList.getFirstVisiblePosition()==0){
CommentListInfo c;
c = (CommentListInfo) CommentList.getAdapter().getItem(CommentList.getFirstVisiblePosition());
mPositionId = c.CommentId;
Log.d("mpositionId", mPositionId);
String strUrl = GlobalMethod.TokenGenerator() + "&action=getCommentsVideo";
new CommentsDetail().execute(UserId,VidoId,strfriendsSyncDate,c.CommentId,strUrl,"1");
CommentList.setAdapter(commentAdapter); //update code
}