An Android Library that provide drag & drop and swipe-to-dismiss with list state maintain functionality for RecyclerView items
Add this to your project build.gradle
Project-level build.gradle (/build.gradle):
allprojects {
repositories {
google()
jcenter()
maven { url 'https://jitpack.io' }
}
ext {
appcompat = '1.1.0-alpha01'
retrofit_version = '2.3.0'
}
}Add this to your project build.gradle
Module-level build.gradle (/build.gradle):
dependencies {
implementation 'com.github.appsfeature:swipe-drag-helper:x.y'
} In your activity class:
public class ExampleActivity extends AppCompatActivity {
private List<User> usersList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_list);
RecyclerView userRecyclerView = findViewById(R.id.recyclerview_user_list);
userRecyclerView.setLayoutManager(new LinearLayoutManager(this));
AdvanceListAdapter adapter = new AdvanceListAdapter(this, usersList);
SwipeDragHelper swipeAndDragHelper = SwipeDragHelper.Builder(userRecyclerView, adapter)
.setDisableDragPositionAt(0)
.setEnableSwipeOption(false)
.setEnableGridView(false);
adapter.setSwipeDragHelper(swipeAndDragHelper);
userRecyclerView.setAdapter(adapter);
usersList.addAll(getHomePageList());
adapter.notifyDataSetChanged();
}
public List<User> getHomePageList() {
HashMap<Integer, Integer> rankList = getRankList(this);
-Or-
Note: User model extend RankModel
HashMap<Integer, Integer> rankList = SwipeDragHelper.getRankHashMap(context, new TypeToken<List<User>>() {});
List<User> homeList = new UsersData().getUsersList();
if (homeList != null) {
for(User item : homeList){
Integer rank = rankList.get(item.getId());
if(rank != null){
item.setRanking(rank);
}
}
sortArrayList(homeList);
}
return homeList;
}
public HashMap<Integer, Integer> getRankList(Context context) {
HashMap<Integer, Integer> map = new HashMap<>();
List<User> rankList = SwipeDragHelper.getRankList(context, new TypeToken<List<User>>() {
});
if(rankList != null){
for (User item : rankList){
map.put(item.getId(), item.getRanking());
}
}
return map;
}
private void sortArrayList(List<User> list) {
Collections.sort(list, new Comparator<User>() {
@Override
public int compare(User item, User item2) {
Integer value = item.getRanking();
Integer value2 = item2.getRanking();
return value.compareTo(value2);
}
});
}
}
In your Adapter class:
public class UserListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements
SwipeDragActionListener {
...
...
private SwipeDragHelper swipeDragHelper;
public void setSwipeDragHelper(SwipeDragHelper swipeDragHelper) {
this.swipeDragHelper = swipeDragHelper;
}
@Override
@SuppressLint("ClickableViewAccessibility")
public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder holder, int position) {
SecondViewHolder viewHolder = (SecondViewHolder) holder;
...
...
holder.setDragTouchListener(holder, item.isChangePosition());
}
public class SecondViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
, View.OnTouchListener{
...
...
TextView tvChangePosition;
SecondViewHolder(View itemView) {
super(itemView);
...
...
tvChangePosition = itemView.findViewById(R.id.tv_change_position);
tvChangePosition.setOnClickListener(this);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
final int position = getAdapterPosition();
if(view.getId() == R.id.tv_change_position) {
usersList.get(position).setChangePosition(!usersList.get(position).isChangePosition());
//add this method for disable click when drag option is active
// subAdapter.setChangePosition(usersList.get(position).isChangePosition());
setDragTouchListener(SecondViewHolder.this, usersList.get(position).isChangePosition());
if (usersList.get(position).isChangePosition()) {
Toast.makeText(context,"Drag and drop where you want.", Toast.LENGTH_SHORT).show();
}
}else {
User item = usersList.get(getAdapterPosition());
Toast.makeText(context, item.getName(), Toast.LENGTH_SHORT).show();
}
}
@Override
@SuppressLint("ClickableViewAccessibility")
public boolean onTouch(View v, MotionEvent event) {
if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
swipeDragHelper.getTouchHelper().startDrag(SecondViewHolder.this);
}
return false;
}
@SuppressLint("ClickableViewAccessibility")
public void setDragTouchListener(SecondViewHolder viewHolder, boolean isEnableTouch) {
viewHolder.tvChangePosition.setText(isEnableTouch ? "Stop" : "Change Position");
if (isEnableTouch) {
viewHolder.itemView.setOnTouchListener(this);
swipeDragHelper.makeMeShake(viewHolder.itemView, 80, 5);
} else {
viewHolder.itemView.setOnTouchListener(null);
viewHolder.itemView.clearAnimation();
}
}
}
@Override
public void onViewMoved(RecyclerView.ViewHolder viewHolder, int oldPosition, int newPosition) {
User item = usersList.get(oldPosition).getClone();
usersList.remove(oldPosition);
usersList.add(newPosition, item);
notifyItemMoved(oldPosition, newPosition);
if (viewHolder instanceof SecondViewHolder) {
((SecondViewHolder) viewHolder).setDragTouchListener(((SecondViewHolder) viewHolder), false);
}
}
@Override
public void onStateChanged(@Nullable RecyclerView.ViewHolder viewHolder, int actionState) {
if(actionState == ItemTouchHelper.ACTION_STATE_IDLE) {
for (int i=0; i < usersList.size(); i++){
usersList.get(i).setRanking(i + 1);
usersList.get(i).setChangePosition(false);
}
//No need to notifyDataSetChanged
//Update list ranking and save in preferences
swipeDragHelper.getListUtil().saveRankList(context, usersList,new TypeToken<List<User>>() {});
}
}
@Override
public void onViewSwiped(int position) {
usersList.remove(position);
notifyItemRemoved(position);
}
}
- If Drag and Drop not moving properly i.e dropping slot automatically than check your adapter code
//Wrong code
@Override
public int getItemViewType(int position) {
super.getItemViewType(position);
return position;
}
//Correct code
@Override
public int getItemViewType(int position) {
super.getItemViewType(position);
return position == 0 ? 0 : 1;
}