Somehow the name in the first ArrayList position (see Line 6) was
overwritten with that in the second (see Line 13). Can anyone offer a
reason as to what might be happening?
Refer to LogCat section for the numbers:
- Lines 2 and 3 show that the cursor has accessed the DB.
- Lines 4 thru 9 show that the names are retrieved from the DB and passed
to ArrayLists.
- Lines 10 through 14 show the petNameList contents (see A) passed to the
adapter (see B).
- Lines 15 through 18 show petNameList contents passed from MainActivity
(see C).
- Lines 22 through 27 show that the first position of the ArrayList holds
"qwerty".
- Lines 31 through 36 show that the second position of the ArrayList holds
"qwerty".
I will keep experimenting to see if I can find out what happens and post it
if I find the reason.
**LogCat:**
1. !------MainActivity: Starts here-----!
2. DB has: 2 rows
3. cursor has: 2 rows
4. The following should be the same:
5. name from cursor is: fert
6. petNameList[0] is: fert
7. The following should be the same:
8. name from cursor is: qwerty
9. petNameList[1] is: qwerty
10. petNameList is: [com.example.jbiss.petminder.PetName@ea7cc11,
com.example.jbiss.petminder.PetName@3c54176]
11. petNameList count is: 2
12. petNameList elements passed to mAdapter:
13. petNameList[0] passed to the adapter constructor is: qwerty
14. petNameList[1] passed to the adapter constructor is: qwerty
15. made it to: SelectNameAdapter constructor
16. items is: [com.example.jbiss.petminder.PetName@ea7cc11,
com.example.jbiss.petminder.PetName@3c54176]
17. ArrayList[0] passed to the adapter constructor is: qwerty
18. ArrayList[1] passed to the adapter constructor is: qwerty
19. made it to: onCreateViewHolder
20. made it to: ViewHolder
21. made it to: onBindViewHolder
22. position in ArrayList is: 0
23. mItems[0] (pointer) is: com.example.jbiss.petminder.PetName@ea7cc11
24. pNm (pointer) is): com.example.jbiss.petminder.PetName@ea7cc11
25. pNm (String ) is: qwerty
26. NOTE: item should equal mItems[0]
27. onBindViewHolder passed: item.getPetName() qwerty to ViewHolder
28. made it to: onCreateViewHolder
29. made it to: ViewHolder
30. made it to: onBindViewHolder
31. position in ArrayList is: 1
32. mItems[1] (pointer) is: com.example.jbiss.petminder.PetName@3c54176
33. pNm (pointer) is): com.example.jbiss.petminder.PetName@3c54176
34. pNm (String ) is: qwerty
35. NOTE: item should equal mItems[1]
36. onBindViewHolder passed: item.getPetName() qwerty to ViewHolder
**The relevant code in MainActivity:**
Log.d("!------MainActivity", "Starts here-----!");
long numItems = mDbHelper.getPetCount();
Log.d("DB has", String.valueOf(numItems) + " rows");
if (numItems != 0) {
cursor = mDbHelper.getPetNames();
numItems = cursor.getCount();
Log.d("cursor has", String.valueOf(numItems) + " rows");
cursor.moveToFirst();
A)
for (int i = 0; i < numItems; i++) {
PetName name = new PetName(cursor.getString(PET_NAMES));
Log.d("The following should be the same", " ");
Log.d("name from cursor is", name.getPetName());
petNameList.add(name);
//the following is for troubleshooting, it gets the
currently added petname
PN = petNameList.get(i);
pName = PN.getPetName();
Log.d("petNameList[" + i + "] is", pName);
cursor.moveToNext();
}
} else{
//otherwise, if no pet names exist int he DB, make the no pets
found message visible
msgTv.setText(R.string.no_pets);
msgTv.setVisibility(View.VISIBLE);
}
B)
Log.d("petNameList is", String.valueOf(petNameList));
num = petNameList.size();
Log.d("petNameList count is", String.valueOf(num));
Log.d("petNameList elements passed to mAdapter", " ");
for(int j =0; j < num; j++){
PN = petNameList.get(j);
pName = PN.getPetName();
Log.d("petNameList[" + j + "] passed to the adapter constructor
is", pName);
}
//setup the adapter and apply it to the RecyclerView
mAdapter = new SelectNameAdapter(this, petNameList);
mRecyclerView.setAdapter(mAdapter);
**Adapter code:**
private ArrayList<PetName> mItems;
private Context mContext;
public SelectNameAdapter(Context context, ArrayList<PetName> items) {
Log.d("made it to", "SelectNameAdapter constructor");
Log.d("items is", String.valueOf(items));
PetName PN;
String name;
C)
int num = items.size();
for(int j =0; j < num; j++){
PN = items.get(j);
name = PN.getPetName();
Log.d("ArrayList[" + j + "] passed to the adapter constructor
is", name);
}
this.mContext = context;
this.mItems = items;
}
@Override
public SelectNameAdapter.ViewHolder onCreateViewHolder(ViewGroup
parent, int i) {
Log.d("made it to", "onCreateViewHolder");
LayoutInflater inflater = LayoutInflater.from(mContext);
View itemView = inflater.inflate(R.layout.pet_info, parent, false);
ViewHolder viewHolder = new ViewHolder(itemView);
return viewHolder;
}
@Override
public void onBindViewHolder(SelectNameAdapter.ViewHolder holder, int
position) {
Log.d("made it to", "onBindViewHolder");
Log.d("position in ArrayList is", String.valueOf(position));
Log.d("mItems[" + position + "] (pointer) is",
String.valueOf(mItems.get(position)));
PetName pNm = mItems.get(position);
Log.d("pNm (pointer) is)", String.valueOf(pNm));
String n = pNm.getPetName();
Log.d("pNm (String ) is", n);
Log.d("NOTE", "item should equal mItems[" + position + "]");
holder.tvName.setText(pNm.getPetName());
Log.d("onBindViewHolder passed ", "item.getPetName() " +
pNm.getPetName() + " to ViewHolder");
}
@Override
public int getItemCount() {
return mItems.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView tvName;
public ViewHolder(View itemView) {
super(itemView);
Log.d("made it to", "ViewHolder");
tvName = (TextView) itemView.findViewById(R.id.petname);
}
}
}
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