Save new positions in Room after recyclerView drag & drop
I've implemented a recyclerView with a drag and drop feature in my app. Everything works fine until the app is relaunched --any drag and drop changes were not saved/remembered by the app.
I've tried:
- Using SharedPreference + GSON
- Reading other SQLite answers here on SO like this one: Store new position of RecyclerView items in SQLite after being dragged and dropped
- Reading Paul Burke's Medium Post
My current code looks like this:
In onCreate
ItemViewModel itemViewModel = ViewModelProviders.of(this).get(ItemViewModel.class);
itemViewModel.getAllItems().observe(this, new Observer<List<Item>>() {
@Override
public void onChanged(List<Item> items) {
adapter.setItemList(items);
itemList = items; //Global variable itemList
}
});
The method called when item is dragged/moved
private void swap(int firstPosition, int secondPosition) {
Collections.swap(itemList, firstPosition, secondPosition);
for(int i = 0; i < itemList.size(); i++) {
Item currentItem = itemList.get(i);
ItemViewModel.update(currentItem );
}
adapter.notifyItemMoved(firstPosition, secondPosition);
}
Any ideas how I can let my app save the reordered recyclerView after drag and drop? Thanks in advance.
android android-recyclerview android-room asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
add a comment |
I've implemented a recyclerView with a drag and drop feature in my app. Everything works fine until the app is relaunched --any drag and drop changes were not saved/remembered by the app.
I've tried:
- Using SharedPreference + GSON
- Reading other SQLite answers here on SO like this one: Store new position of RecyclerView items in SQLite after being dragged and dropped
- Reading Paul Burke's Medium Post
My current code looks like this:
In onCreate
ItemViewModel itemViewModel = ViewModelProviders.of(this).get(ItemViewModel.class);
itemViewModel.getAllItems().observe(this, new Observer<List<Item>>() {
@Override
public void onChanged(List<Item> items) {
adapter.setItemList(items);
itemList = items; //Global variable itemList
}
});
The method called when item is dragged/moved
private void swap(int firstPosition, int secondPosition) {
Collections.swap(itemList, firstPosition, secondPosition);
for(int i = 0; i < itemList.size(); i++) {
Item currentItem = itemList.get(i);
ItemViewModel.update(currentItem );
}
adapter.notifyItemMoved(firstPosition, secondPosition);
}
Any ideas how I can let my app save the reordered recyclerView after drag and drop? Thanks in advance.
android android-recyclerview android-room asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
Does your entity have anorderproperty in it ? If it does, you could access your dao and run anUPDATESQL in theCollections.swapmethod when reordering and than on every load of the list, return the items ordered by that property.
– Igor Ilic
Nov 14 '18 at 9:55
@Igor It doesn't, though I did include an.update(currentItem)to update each item --somehow this doesn't work
– LittleNobody
Nov 15 '18 at 3:10
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Since I don't think there is any other way of keeping that order after the app closes
– Igor Ilic
Nov 15 '18 at 7:35
@Igor Thanks for your suggestion. I was able to make it save according to what you said. If you want, please reply as an answer and I'll accept it :)
– LittleNobody
Nov 15 '18 at 14:42
add a comment |
I've implemented a recyclerView with a drag and drop feature in my app. Everything works fine until the app is relaunched --any drag and drop changes were not saved/remembered by the app.
I've tried:
- Using SharedPreference + GSON
- Reading other SQLite answers here on SO like this one: Store new position of RecyclerView items in SQLite after being dragged and dropped
- Reading Paul Burke's Medium Post
My current code looks like this:
In onCreate
ItemViewModel itemViewModel = ViewModelProviders.of(this).get(ItemViewModel.class);
itemViewModel.getAllItems().observe(this, new Observer<List<Item>>() {
@Override
public void onChanged(List<Item> items) {
adapter.setItemList(items);
itemList = items; //Global variable itemList
}
});
The method called when item is dragged/moved
private void swap(int firstPosition, int secondPosition) {
Collections.swap(itemList, firstPosition, secondPosition);
for(int i = 0; i < itemList.size(); i++) {
Item currentItem = itemList.get(i);
ItemViewModel.update(currentItem );
}
adapter.notifyItemMoved(firstPosition, secondPosition);
}
Any ideas how I can let my app save the reordered recyclerView after drag and drop? Thanks in advance.
android android-recyclerview android-room asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
I've implemented a recyclerView with a drag and drop feature in my app. Everything works fine until the app is relaunched --any drag and drop changes were not saved/remembered by the app.
I've tried:
- Using SharedPreference + GSON
- Reading other SQLite answers here on SO like this one: Store new position of RecyclerView items in SQLite after being dragged and dropped
- Reading Paul Burke's Medium Post
My current code looks like this:
In onCreate
ItemViewModel itemViewModel = ViewModelProviders.of(this).get(ItemViewModel.class);
itemViewModel.getAllItems().observe(this, new Observer<List<Item>>() {
@Override
public void onChanged(List<Item> items) {
adapter.setItemList(items);
itemList = items; //Global variable itemList
}
});
The method called when item is dragged/moved
private void swap(int firstPosition, int secondPosition) {
Collections.swap(itemList, firstPosition, secondPosition);
for(int i = 0; i < itemList.size(); i++) {
Item currentItem = itemList.get(i);
ItemViewModel.update(currentItem );
}
adapter.notifyItemMoved(firstPosition, secondPosition);
}
Any ideas how I can let my app save the reordered recyclerView after drag and drop? Thanks in advance.
android android-recyclerview android-room android android-recyclerview android-room asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
asked Nov 14 '18 at 9:50
LittleNobodyLittleNobody
104
104
Does your entity have anorderproperty in it ? If it does, you could access your dao and run anUPDATESQL in theCollections.swapmethod when reordering and than on every load of the list, return the items ordered by that property.
– Igor Ilic
Nov 14 '18 at 9:55
@Igor It doesn't, though I did include an.update(currentItem)to update each item --somehow this doesn't work
– LittleNobody
Nov 15 '18 at 3:10
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Since I don't think there is any other way of keeping that order after the app closes
– Igor Ilic
Nov 15 '18 at 7:35
@Igor Thanks for your suggestion. I was able to make it save according to what you said. If you want, please reply as an answer and I'll accept it :)
– LittleNobody
Nov 15 '18 at 14:42
add a comment |
Does your entity have anorderproperty in it ? If it does, you could access your dao and run anUPDATESQL in theCollections.swapmethod when reordering and than on every load of the list, return the items ordered by that property.
– Igor Ilic
Nov 14 '18 at 9:55
@Igor It doesn't, though I did include an.update(currentItem)to update each item --somehow this doesn't work
– LittleNobody
Nov 15 '18 at 3:10
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Since I don't think there is any other way of keeping that order after the app closes
– Igor Ilic
Nov 15 '18 at 7:35
@Igor Thanks for your suggestion. I was able to make it save according to what you said. If you want, please reply as an answer and I'll accept it :)
– LittleNobody
Nov 15 '18 at 14:42
Does your entity have an
order property in it ? If it does, you could access your dao and run an UPDATE SQL in the Collections.swap method when reordering and than on every load of the list, return the items ordered by that property.– Igor Ilic
Nov 14 '18 at 9:55
Does your entity have an
order property in it ? If it does, you could access your dao and run an UPDATE SQL in the Collections.swap method when reordering and than on every load of the list, return the items ordered by that property.– Igor Ilic
Nov 14 '18 at 9:55
@Igor It doesn't, though I did include an
.update(currentItem) to update each item --somehow this doesn't work– LittleNobody
Nov 15 '18 at 3:10
@Igor It doesn't, though I did include an
.update(currentItem) to update each item --somehow this doesn't work– LittleNobody
Nov 15 '18 at 3:10
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Since I don't think there is any other way of keeping that order after the app closes
– Igor Ilic
Nov 15 '18 at 7:35
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Since I don't think there is any other way of keeping that order after the app closes
– Igor Ilic
Nov 15 '18 at 7:35
@Igor Thanks for your suggestion. I was able to make it save according to what you said. If you want, please reply as an answer and I'll accept it :)
– LittleNobody
Nov 15 '18 at 14:42
@Igor Thanks for your suggestion. I was able to make it save according to what you said. If you want, please reply as an answer and I'll accept it :)
– LittleNobody
Nov 15 '18 at 14:42
add a comment |
1 Answer
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If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Once added, you could access your dao and run an UPDATE SQL in the Collections.swap method when reordering items and than on every load of the list, return the items ordered by that property.
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
add a comment |
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If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Once added, you could access your dao and run an UPDATE SQL in the Collections.swap method when reordering items and than on every load of the list, return the items ordered by that property.
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
add a comment |
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Once added, you could access your dao and run an UPDATE SQL in the Collections.swap method when reordering items and than on every load of the list, return the items ordered by that property.
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
add a comment |
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Once added, you could access your dao and run an UPDATE SQL in the Collections.swap method when reordering items and than on every load of the list, return the items ordered by that property.
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Once added, you could access your dao and run an UPDATE SQL in the Collections.swap method when reordering items and than on every load of the list, return the items ordered by that property.
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
answered Nov 15 '18 at 14:47
Igor IlicIgor Ilic
1,2081914
1,2081914
add a comment |
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Does your entity have an
orderproperty in it ? If it does, you could access your dao and run anUPDATESQL in theCollections.swapmethod when reordering and than on every load of the list, return the items ordered by that property.– Igor Ilic
Nov 14 '18 at 9:55
@Igor It doesn't, though I did include an
.update(currentItem)to update each item --somehow this doesn't work– LittleNobody
Nov 15 '18 at 3:10
If you wish to preserve the order of your items once you close your app or move to another activity, you will need to add a property to your entity files which will server as an order value for it. Since I don't think there is any other way of keeping that order after the app closes
– Igor Ilic
Nov 15 '18 at 7:35
@Igor Thanks for your suggestion. I was able to make it save according to what you said. If you want, please reply as an answer and I'll accept it :)
– LittleNobody
Nov 15 '18 at 14:42