当项目的标志变为 4 时，我尝试从 View 中删除项目。我尝试了 mObjects.remove(position)，然后尝试了 notificationDataSetChanged()。但它不起作用。我们尝试了以下所有方法
if (getItem(position).getFlag().trim().equalsIgnoreCase("4")) {
remove(position);
adapter.notifyDataSetChanged();
matcheslistview.setAdapter(adapter);
also this one
// mObjects.remove(position)
// notifyDataSetChanged();
and this one
// mObjects.remove(position);
//remove(position);
//mainObjects.remove(position);
//notifyDataSetChanged();
and this one
// Object toRemove = adapter.getItem(position);
// mObjects.remove(toRemove);
// mObjects.clear();
并且我们一直得到 java.lang.IndexOutOfBoundsException: Invalid index 1, size is 0.Here 是完整的适配器类
private class MatchedDataAdapter extends BaseAdapter implements Filterable {
private AQuery aQuery;
private Activity mActivity;
private LayoutInflater mInflater;
private SessionManager sessionManager;
private int uflag;
MyFilter mfilter;
DatabaseHandler db;
ArrayList<LikeMatcheddataForListview> mObjects;
ArrayList<LikeMatcheddataForListview> mainObjects;
Context context;
public MatchedDataAdapter(Activity context,
ArrayList<LikeMatcheddataForListview> objects,
int imageHeigthAndWidth[]) {
this.mObjects = objects;
mainObjects = objects;
//Log.e("size", Integer.toString(mObjects.size()));
this.mActivity = context;
try {
mInflater = (LayoutInflater) mActivity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
catch (Exception e)
{
e.printStackTrace();
}
aQuery = new AQuery(context);
db = new DatabaseHandler(context);
}
@Override
public int getCount() {
return mObjects.size();
}
@Override
public LikeMatcheddataForListview getItem(int position) {
return mObjects.get(position);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.matchedlistviewitem,
null);
holder.imageview = (ImageView) convertView
.findViewById(R.id.userimage);
holder.textview = (TextView) convertView
.findViewById(R.id.userName);
holder.lastMasage = (TextView) convertView
.findViewById(R.id.lastmessage);
holder.imgStatus = (ImageView) convertView
.findViewById(R.id.imgStatus);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textview.setText(getItem(position).getUserName());
if (getItem(position).getFlag().trim().equalsIgnoreCase("4")) {
mObjects.remove(position);
adapter.notifyDataSetChanged();
matcheslistview.setAdapter(adapter);
我们想要删除带有标志 4 的项目，我们正在使用来自 db 的服务读取此标志，并且在接收时我们调用 DisplayContentTask 类，如下所示
class GetLikeMatchedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
new DisplayContentTask(intent).execute();
}
}
我们如何获取项目位置以便删除带有标志 4 的项目...或者我是另一种删除带有标志 4 的项目的方法，我们不知道，但感谢您对此的帮助
class DisplayContentTask extends AsyncTask<Void, Void, Void> {
Intent intent;
private Ultilities mUltilities = new Ultilities();
private List<NameValuePair> getuserparameter;
private String likedmatchedata, Unmatchedata;
int match1;
private LikedMatcheData matcheData;
private ArrayList<com.appdupe.flamer.pojo.Likes> likesList;
private LikeMatcheddataForListview matcheddataForListview;
DatabaseHandler mDatabaseHandler = new DatabaseHandler(getActivity());
private boolean isResponseSuccess = true;
ArrayList<LikeMatcheddataForListview> tempArray = new ArrayList<LikeMatcheddataForListview>();
@Override
protected void onPreExecute() {
super.onPreExecute();
AppLog.Log(TAG, "BackgroundTaskForFindLikeMatched onPreExecute ");
}
DisplayContentTask(Intent intent) {
this.intent = intent;
}
@Override
protected Void doInBackground(Void... voids) {
try {
File appDirectory = mUltilities
.createAppDirectoy(getResources().getString(
R.string.appdirectory));
AppLog.Log(TAG,
"BackgroundTaskForFindLikeMatched doInBackground appDirectory "
+ appDirectory);
File _picDir = new File(appDirectory, getResources().getString(
R.string.imagedirematchuserdirectory));
AppLog.Log(TAG,
"BackgroundTaskForFindLikeMatched doInBackground ");
// getuserparameter = mUltilities.getUserLikedParameter(params);
likedmatchedata = intent.getStringExtra("GET_MATCHED_RESPONSE");
// Unmatchedata = intent.getStringExtra("GET_UNMATCHED_RESPONSE");//hadi
AppLog.Log(TAG,
"BackgroundTaskForFindLikeMatched doInBackground likedmatchedata "
+ likedmatchedata);
Gson gson = new Gson();
matcheData = gson.fromJson(likedmatchedata,
LikedMatcheData.class);
AppLog.Log(TAG,
"BackgroundTaskForFindLikeMatched doInBackground matcheData "
+ matcheData);
// "errNum": "51",
// "errFlag": "0",
// "errMsg": "Matches found!",
if (matcheData.getErrFlag() == 0) {
likesList = matcheData.getLikes();
AppLog.Log(TAG,
"BackgroundTaskForFindLikeMatched doInBackground likesList "
+ likesList);
if (tempArray != null) {
tempArray.clear();
}
AppLog.Log(TAG,
"BackgroundTaskForFindLikeMatched doInBackground likesList sized "
+ likesList.size());
Log.v("Matches", "" + likesList.size());
match1 = likesList.size();
for (int i = 0; i < likesList.size(); i++) {
Log.d("likelist", likesList.toString());
matcheddataForListview = new LikeMatcheddataForListview();
String userName = likesList.get(i).getfName();
String facebookid = likesList.get(i).getFbId();
// Log.i(TAG, "Background facebookid......"+facebookid);
String picturl = likesList.get(i).getpPic();
int falg = likesList.get(i).getFlag();
// if (likesList.get(i).getFlag()==4) {
// likesList.remove(getId());
// }
Log.i("komak10",""+likesList.get(i).getFlag());
String latd = likesList.get(i).getLadt();
matcheddataForListview.setFacebookid(facebookid);
matcheddataForListview.setUserName(userName);
matcheddataForListview.setImageUrl(picturl);
matcheddataForListview.setFlag("" + falg);
matcheddataForListview.setladt(latd);
// matcheddataForListview.setFilePath(filePath);
File imageFile = mUltilities.createFileInSideDirectory(
_picDir, userName + facebookid + ".jpg");
// logDebug("BackGroundTaskForUserProfile doInBackground imageFile is profile "+imageFile.isFile());
Utility.addBitmapToSdCardFromURL(likesList.get(i)
.getpPic().replaceAll(" ", "%20"), imageFile);
matcheddataForListview.setFilePath(imageFile
.getAbsolutePath());
if (!preferences.getString(Constant.FACEBOOK_ID, "")
.equals(facebookid)) {
tempArray.add(matcheddataForListview);
}
}
DatabaseHandler mDatabaseHandler = new DatabaseHandler(
getActivity());
// SessionManager mSessionManager = new SessionManager(
// MainActivity.this);
String userFacebookid = preferences.getString(
Constant.FACEBOOK_ID, "");
//
boolean isdataiserted = mDatabaseHandler.insertMatchList(
tempArray, userFacebookid);
} else if (matcheData.getErrFlag() == 1) {
if(tempArray!=null)
{
tempArray.clear();
}
} else {
// do nothing
}
} catch (Exception e) {
AppLog.handleException(
"BackgroundTaskForFindLikeMatched doInBackground Exception ",
e);
// some thing wrong happend
isResponseSuccess = false;
}
return null;
}
最佳答案
不要删除getview中的对象，如果必须过滤它，请在发送到适配器之前过滤它。可能在创建 subview 时，第一个单元格具有标签“4”，现在 View 没有创建(因为没有调用 return)，但您试图删除它的位置，所以它肯定会给您 IndexOutOfBoundsException。
我最好的解决方案是，设置适配器
new ArrayList<LikeMatcheddataForListview>()
每当您启动屏幕时。一旦您的 AsyncTask 完成，过滤掉带有标签“4”的子级(最好仅在 asynctask 中过滤掉它，减少 ui 线程中的任务)，然后刷新适配器，例如
public void refresh(ArrayList<LikeMatcheddataForListview>() arrObjects){
objects = arrObjects;
notifyDataSetChanged();
}
检查一下，应该可以解决问题
关于android - 从适配器内的 View 中删除项目，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39698200/