在其中一个网页上安装一个ListView的Android应用程序。 ListView有一个数组，其中包含5个对象，这些对象将传递到要显示的列表适配器中。在列表视图中，它显示5个项目，但底部显示为重复项目。但是，当您单击此项时，它将显示在另一页上不重复的正确数据。下面是代码和截图。
MyJobsFragment.java
private void bidOnList() throws ParseException
{
final ArrayList<String> jobsListArray = new ArrayList<>();
// Iterate through entire bids table
for (DataSnapshot ds : getBidListChildren())
{
// Iterate through the actual bids information
Iterable<DataSnapshot> bidsSnapShot = ds.getChildren();
for (DataSnapshot ds1 : bidsSnapShot)
{
// if the User Id equals the current user added to a list
if (getBidInformation(ds1).getUserID().equals(auth.getCurrentUser().getUid()))
{
boolean active = ds1.child("active").getValue(boolean.class);
if (active)
{
jobsListArray.add(ds.getKey());
}
}
}
}
// Go through the jobs table
for (DataSnapshot ds3 : getJobListChildren())
{
/*
If the job is in the jobsListArray previously and the status is Pending
Add to the jobsList
*/
if (jobsListArray.contains(ds3.getKey()) && getJobInformation(ds3).getJobStatus().equals("Pending"))
{
Date sdf = new SimpleDateFormat("dd/MM/yyyy").parse(genericMethods.getJobInformation(ds3).getCollectionDate());
if (new Date().before(sdf))
{
jobListKey.add(ds3.getKey());
jobList.add(getJobInformation(ds3));
}
}
}
// Display information in ListView
mAdapterBidOn = new MyCustomAdapterForTabViews(getActivity(), isAdded(), host, getLayoutInflater(), getFragmentManager());
mAdapterBidOn.addKeyArray(jobListKey);
mAdapterBidOn.addArray(jobList);
jobListViewBidOn.setAdapter(mAdapterBidOn);
// Press on the object and go view all the Job Information and Bids
jobListViewBidOn.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
BidOnJobsFragment bidOnJobsFragment = new BidOnJobsFragment();
Bundle bundle = new Bundle();
bundle.putSerializable("Job", mAdapterBidOn.mData.get(position));
bundle.putSerializable("JobId", mAdapterBidOn.mDataKeys.get(position));
bidOnJobsFragment.setArguments(bundle);
getFragmentManager().beginTransaction().replace(R.id.content, bidOnJobsFragment).addToBackStack("tag").commit();
}
});
}
上述方法将所有相关数据添加到数组列表中，并将其添加到适配器中。
自定义适配器
public class MyCustomAdapterForTabViews extends BaseAdapter
{
public ArrayList<JobInformation> mData = new ArrayList<>();
public ArrayList<JobInformation> mDataOrig = new ArrayList<>();
public ArrayList<String> mDataKeys = new ArrayList<>();
private TabHost host;
public LayoutInflater mInflater;
private FragmentActivity fragmentActivity;
private LayoutInflater layoutInflater;
private FragmentManager fragmentManager;
public MyCustomAdapterForTabViews(FragmentActivity fragmentActivity, boolean isAdded, TabHost host, LayoutInflater layoutInflater, FragmentManager fragmentManager)
{
if (isAdded)
{
this.fragmentActivity = fragmentActivity;
this.fragmentManager = fragmentManager;
this.layoutInflater = layoutInflater;
mInflater = (LayoutInflater) fragmentActivity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
this.host = host;
}
public void addItem(final JobInformation item)
{
mData.add(item);
mDataOrig.add(item);
}
public void addArray(final ArrayList<JobInformation> j)
{
mData.clear();
mDataOrig.clear();
mData = j;
mDataOrig = j;
}
public void addKeyArray(final ArrayList<String> k)
{
mDataKeys.clear();
mDataKeys = k;
}
@Override
public int getCount()
{
return mData.size();
}
@Override
public Object getItem(int position)
{
return mData.get(position);
}
@Override
public long getItemId(int position)
{
return 0;
}
@Override
public boolean hasStableIds()
{
return false;
}
@Override
public void registerDataSetObserver(DataSetObserver observer)
{
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer)
{
}
@Override
public boolean areAllItemsEnabled()
{
return false;
}
@Override
public boolean isEmpty()
{
return false;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
// Bid on holder
MyCustomAdapterForTabViews.GroupViewHolderBidOn holderBidOn;
// Accepted holder
final MyCustomAdapterForTabViews.GroupViewHolderAccepted holderAccepted;
// Completed holder
MyCustomAdapterForTabViews.GroupViewHolderCompleted holderCompleted;
if (convertView == null)
{
// Bid on
if (host.getCurrentTab() == 0)
{
convertView = mInflater.inflate(R.layout.job_info_bid_on, null);
holderBidOn = new MyCustomAdapterForTabViews.GroupViewHolderBidOn();
holderBidOn.textViewJobName = convertView.findViewById(R.id.textName);
holderBidOn.imageViewCross = convertView.findViewById(R.id.imageViewCross);
holderBidOn.imageViewEditPen = convertView.findViewById(R.id.imageViewEditPen);
holderBidOn.textViewJobDescription = convertView.findViewById(R.id.textDesc);
holderBidOn.textViewAddressFrom = convertView.findViewById(R.id.textAddressFrom);
holderBidOn.textViewAddressTo = convertView.findViewById(R.id.textAddressTo);
holderBidOn.textViewJobName.setText(mData.get(position).getAdvertName());
holderBidOn.textViewJobDescription.setText(mData.get(position).getAdvertDescription());
holderBidOn.textViewAddressFrom.setText(mData.get(position).getColL1() + ", " + mData.get(position).getColTown() + ", " + mData.get(position).getColPostcode());
holderBidOn.textViewAddressTo.setText(mData.get(position).getDelL1() + ", " + mData.get(position).getDelPostcode() + ", " + mData.get(position).getDelPostcode());
holderBidOn.imageViewCross.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
final DatabaseConnections databaseConnections = new DatabaseConnections();
final AlertDialog.Builder alertDialog = new AlertDialog.Builder(fragmentActivity);
View mView = layoutInflater.inflate(R.layout.popup_creator, null);
alertDialog.setTitle("Delete Job");
alertDialog.setView(mView);
final AlertDialog dialog = alertDialog.create();
dialog.show();
TextView customText = mView.findViewById(R.id.textViewCustomText);
customText.setText("Are You Sure You Want To Delete " + mData.get(position).getAdvertName() + "?");
Button yesButton = mView.findViewById(R.id.yesButton);
Button noButton = mView.findViewById(R.id.noButton);
yesButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
// My Adverts
if (mData.get(position).getPosterID().equals(databaseConnections.getCurrentUser()))
{
databaseConnections.getDatabaseReference().child("Jobs").child(mDataKeys.get(position)).addListenerForSingleValueEvent(new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
databaseConnections.getDatabaseReference().child("Jobs").child(mDataKeys.get(position))
.child("jobStatus").setValue("Inactive");
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
});
databaseConnections.getDatabaseReference().child("Bids").child(mDataKeys.get(position)).addListenerForSingleValueEvent(new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
databaseConnections.getDatabaseReference().child("Bids").child(mDataKeys.get(position)).child(mData.get(position)
.getCourierID()).child("active").setValue(false);
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
});
}
// My Jobs
else
{
databaseConnections.getDatabaseReference().child("Bids").child(mDataKeys.get(position)).addListenerForSingleValueEvent(new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
databaseConnections.getDatabaseReference().child("Bids").child(mDataKeys.get(position)).child(databaseConnections.getCurrentUser()).child("active").setValue(false);
mData.remove(position);
mDataKeys.remove(position);
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
});
}
notifyDataSetChanged();
dialog.dismiss();
}
});
noButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
dialog.dismiss();
}
});
}
});
DatabaseConnections databaseConnections = new DatabaseConnections();
// My Adverts
if (mData.get(position).getPosterID().equals(databaseConnections.getCurrentUser()))
{
holderBidOn.imageViewEditPen.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
GenericMethods genericMethods = new GenericMethods();
PostAnAdvertFragment postAnAdvertFragment = new PostAnAdvertFragment();
Bundle bundle = new Bundle();
bundle.putSerializable("JobInfo", mData.get(position));
bundle.putSerializable("JobIdKey", mDataKeys.get(position));
postAnAdvertFragment.setArguments(bundle);
genericMethods.beginTransactionToFragment(fragmentManager, postAnAdvertFragment);
}
});
}
// My Jobs
else
{
holderBidOn.imageViewEditPen.setVisibility(View.GONE);
}
convertView.setTag(holderBidOn);
}
// Accepted
else if (host.getCurrentTab() == 1)
{
convertView = mInflater.inflate(R.layout.job_info_accepted, null);
holderAccepted = new MyCustomAdapterForTabViews.GroupViewHolderAccepted();
holderAccepted.textViewJobName = convertView.findViewById(R.id.textName);
holderAccepted.textViewDescription = convertView.findViewById(R.id.textDesc);
holderAccepted.textViewAddressFrom = convertView.findViewById(R.id.textAddressFrom);
holderAccepted.textViewAddressTo = convertView.findViewById(R.id.textAddressTo);
holderAccepted.textViewBid = convertView.findViewById(R.id.textBid);
holderAccepted.textViewJobName.setText(mData.get(position).getAdvertName());
holderAccepted.textViewDescription.setText(mData.get(position).getAdvertDescription());
holderAccepted.textViewAddressFrom.setText(mData.get(position).getColL1() + ", " + mData.get(position).getColTown() + ", " + mData.get(position).getColPostcode());
holderAccepted.textViewAddressTo.setText(mData.get(position).getDelL1() + ", " + mData.get(position).getDelPostcode() + ", " + mData.get(position).getDelPostcode());
DatabaseConnections databaseConnections = new DatabaseConnections();
databaseConnections.getDatabaseReference().child("Bids").child(mDataKeys.get(position)).child(mData.get(position).getCourierID()).addValueEventListener(new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
String acceptedBid = dataSnapshot.child("userBid").getValue(String.class);
holderAccepted.textViewBid.setText("£" + acceptedBid);
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
});
convertView.setTag(holderAccepted);
}
// Completed
else if (host.getCurrentTab() == 2)
{
convertView = mInflater.inflate(R.layout.job_info_list_completed, null);
holderCompleted = new MyCustomAdapterForTabViews.GroupViewHolderCompleted();
holderCompleted.textViewJobName = convertView.findViewById(R.id.textName);
holderCompleted.imageViewCross = convertView.findViewById(R.id.imageViewCross);
holderCompleted.textViewJobName.setText(mData.get(position).getAdvertName());
holderCompleted.imageViewCross.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
final DatabaseConnections databaseConnections = new DatabaseConnections();
final AlertDialog.Builder alertDialog = new AlertDialog.Builder(fragmentActivity);
View mView = layoutInflater.inflate(R.layout.popup_creator, null);
alertDialog.setTitle("Delete Job");
alertDialog.setView(mView);
final AlertDialog dialog = alertDialog.create();
dialog.show();
TextView customText = mView.findViewById(R.id.textViewCustomText);
customText.setText("Are You Sure You Want To Delete " + mData.get(position).getAdvertName() + "?");
Button yesButton = mView.findViewById(R.id.yesButton);
Button noButton = mView.findViewById(R.id.noButton);
yesButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
// My Adverts
if (mData.get(position).getPosterID().equals(databaseConnections.getCurrentUser()))
{
databaseConnections.getDatabaseReference().child("Jobs").child(mDataKeys.get(position)).addListenerForSingleValueEvent(new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
databaseConnections.getDatabaseReference().child("Jobs").child(mDataKeys.get(position))
.child("jobStatus").setValue("Inactive");
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
});
}
// My Jobs
else
{
databaseConnections.getDatabaseReference().child("Bids").child(mDataKeys.get(position)).addListenerForSingleValueEvent(new ValueEventListener()
{
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
databaseConnections.getDatabaseReference().child("Bids").child(mDataKeys.get(position)).child(databaseConnections.getCurrentUser()).child("active").setValue(false);
}
@Override
public void onCancelled(DatabaseError databaseError)
{
}
});
}
notifyDataSetChanged();
dialog.dismiss();
}
});
noButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
dialog.dismiss();
}
});
}
});
convertView.setTag(holderCompleted);
}
} else
{
if (host.getCurrentTab() == 0)
{
holderBidOn = (MyCustomAdapterForTabViews.GroupViewHolderBidOn) convertView.getTag();
} else if (host.getCurrentTab() == 1)
{
holderAccepted = (MyCustomAdapterForTabViews.GroupViewHolderAccepted) convertView.getTag();
} else if (host.getCurrentTab() == 2)
{
holderCompleted = (MyCustomAdapterForTabViews.GroupViewHolderCompleted) convertView.getTag();
}
}
return convertView;
}
public class GroupViewHolderBidOn
{
public TextView textViewJobName;
public TextView textViewJobDescription;
public TextView textViewAddressFrom;
public TextView textViewAddressTo;
public ImageView imageViewCross;
public ImageView imageViewEditPen;
}
public class GroupViewHolderAccepted
{
public TextView textViewJobName;
public TextView textViewDescription;
public TextView textViewAddressFrom;
public TextView textViewAddressTo;
public TextView textViewBid;
}
public class GroupViewHolderCompleted
{
public TextView textViewJobName;
public ImageView imageViewCross;
}
public void filter(String charText)
{
ArrayList<JobInformation> jobs = new ArrayList<>();
ArrayList<JobInformation> jA = new ArrayList<>();
charText = charText.toLowerCase(Locale.getDefault());
if (charText.length() == 0)
{
mData = mDataOrig;
} else
{
for (JobInformation j : mDataOrig)
{
if (j.getWholeString().toLowerCase(Locale.getDefault()).contains(charText))
{
jobs.add(j);
jA.add(j);
} else
{
jA.add(j);
}
}
mData.clear();
mData = jobs;
mDataOrig = jA;
}
notifyDataSetChanged();
}
}
When you click the bottom Panasonic TV
如果需要，可以提供更多代码。
修改
代码按预期运行，直到它到达数组中的第4个元素，一旦该点被命中，它就会进入我认为适用于适配器的基类java类。就好像它忽略了最后两个并回收了观点。
答案 0 :(得分：0)
@Override
public long getItemId(int position)
{
return 0;
}
我认为问题出在上面的适配器方法中。将此更改为：
@Override
public long getItemId(int position)
{
return position;
}