This article shares the specific code for RecyclerView to implement the side-sliding drag function for your reference. The specific content is as follows
Prepare
ItemDragListener
package slideslipdrag;
import .;
/**
* Created on 2018/7/22.
*
* @desc ItemDragListener
*/
public interface ItemDragListener {
/**
* Drag and drag
*
* @param viewHolder viewHolder
*/
void onStartDrag( viewHolder);
}
ItemTouchHelperAdapter
package slideslipdrag;
/**
* @decs: ItemTouchHelperAdapter
* @date: 2018/7/22 13:23
* @version: v 1.0
*/
public interface ItemTouchHelperAdapter {
/**
* move
*
* @param fromPosition Start position
* @param toPosition Termination bit
*/
void onItemMove(int fromPosition, int toPosition);
/**
* Sliding ends
*
* @param position
*/
void onItemSlideSlipEnd(int position);
}
ItemTouchHelperViewHolder
package slideslipdrag;
import ;
/**
* @decs: ItemTouchHelperViewHolder
* @date: 2018/7/22 13:24
* @version: v 1.0
*/
public interface ItemTouchHelperViewHolder {
/**
* Sliding starts
*
* @param context context
*/
void onItemSlideSlipStart(Context context);
/**
* Sliding stop
*
* @param context context
*/
void onItemSlideSlipStop(Context context);
}
SimpleItemTouchHelperCallback
package slideslipdrag;
import ;
import ;
import ;
import ;
import ;
import .;
import .;
import .;
import ;
import ;
import ;
/**
* @decs: SimpleItemTouchHelperCallback
* @date: 2018/7/22 13:34
* @version: v 1.0
*/
public class SimpleItemTouchHelperCallback extends {
private final ItemTouchHelperAdapter mAdapter;
private Context context;
private Paint paint = new Paint();
public SimpleItemTouchHelperCallback(ItemTouchHelperAdapter adapter, Context context) {
mAdapter = adapter;
= context;
}
@Override
public boolean isLongPressDragEnabled() {
return false;
}
@Override
public boolean isItemViewSwipeEnabled() {
return true;
}
@Override
public int getMovementFlags(RecyclerView recyclerView, viewHolder) {
// Enable drag up and down and right swipe in right direction
final int dragFlags = | ;
final int swipeFlags = ;
// final int swipeFlags = | ; Enable swipe in both direction
return makeMovementFlags(dragFlags, swipeFlags);
}
@Override
public long getAnimationDuration(RecyclerView recyclerView, int animationType, float animateDx, float animateDy) {
// return animationType == ItemTouchHelper.ANIMATION_TYPE_DRAG ? DEFAULT_DRAG_ANIMATION_DURATION : DEFAULT_SWIPE_ANIMATION_DURATION;
return animationType == ItemTouchHelper.ANIMATION_TYPE_DRAG ? DEFAULT_DRAG_ANIMATION_DURATION : 350;
}
@Override
public boolean onMove(RecyclerView recyclerView, source, target) {
if (() != ()) {
return false;
}
// Notify the adapter of the move
((), ());
return true;
}
@Override
public void onChildDrawOver(Canvas c, RecyclerView recyclerView, viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
@Override
public void onSwiped(final viewHolder, int i) {
// Notify the adapter of the dismissal
(());
}
@Override
public int getBoundingBoxMargin() {
return ();
}
@Override
public void onChildDraw(final Canvas c, RecyclerView recyclerView, viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
// Fade out the view as it is swiped out of the parent's bounds
if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
View itemView = ;
Bitmap icon;
if (dX > 0) {
icon = ((), );
// Set color for right swipe
((context, ));
// Draw Rect with varying right side, equal to displacement dX
((float) () + (0), (float) (), dX + (0),
(float) (), paint);
// Set the image icon for right swipe
(icon, (float) () + (16), (float) () +
((float) () - (float) () - ()) / 2, paint);
();
}
}
}
@Override
public void onSelectedChanged( viewHolder, int actionState) {
if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
// Let the view holder know that this item is being moved or dragged
ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
(context);
}
(viewHolder, actionState);
/*final boolean swiping = actionState == ItemTouchHelper.ACTION_STATE_SWIPE;
(!swiping);*/
}
@Override
public void clearView(RecyclerView recyclerView, viewHolder) {
(recyclerView, viewHolder);
// Tell the view holder it's time to restore the idle state
ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
(context);
}
@Override
public float getMoveThreshold( viewHolder) {
/*return (viewHolder);*/
return 0.1f;
/*return (0.5f);*/
}
@Override
public float getSwipeThreshold( viewHolder) {
/*if (viewHolder instanceof ) {
return 1f;
}
return (viewHolder);*/
return 0.9f;
}
}
use
layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro
xmlns:tools="/tools"
android:
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/white_gray_button_en_r_selector"
android:descendantFocusability="blocksDescendants"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="@dimen/d18"
android:paddingLeft="@dimen/d12"
android:paddingRight="@dimen/d12"
android:paddingTop="@dimen/d18">
<TextView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:textColor="@color/fontInput"
android:textSize="@dimen/s14"
tools:text="First Project Department" />
<ImageView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:contentDescription="@string/toDo"
android:src="@drawable/dehaze"
android:visibility="invisible" />
<CheckBox
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:button="@drawable/checkbox_image_selector" />
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="@dimen/px1"
android:layout_marginLeft="@dimen/d12"
android:layout_marginStart="@dimen/d12"
android:background="@color/gray" />
</LinearLayout>
adapter
package ;
import ;
import ;
import ;
import ;
import .;
import .;
import ;
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/**
* Created on 2018/6/27.
*
* @desc Parameter Configuration Selection (Stratigraphic)
*/
public class ParaConfigChooseGroundAdapter extends <> implements , , ItemTouchHelperAdapter {
private Context context;
private List<Ground> groundList;
private int viewStateReceive;
private OnRecyclerViewItemClickListener mOnItemClickListener;
private OnRecyclerViewItemLongClickListener mOnItemLongClickListener;
private final ItemDragListener dragStartListener;
private int selectPosition = -1;
/**
* constructor
*
* @param context context
* @param viewState view shape (0 select 1 without selection)
* @param dragStartListener Drag and listen
*/
public ParaConfigChooseGroundAdapter(Context context, int viewState, ItemDragListener dragStartListener) {
= context;
= dragStartListener;
groundList = new ArrayList<>();
viewStateReceive = viewState;
}
private void setSelectPosition(int selectPosition) {
= selectPosition;
}
public void setParaConfigChooseGroundData(List<Ground> list) {
= list;
}
@Override
public int getItemCount() {
if (groundList != null && () > 0) {
return ();
}
return 0;
}
@Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
// Method getTag which get data.
(v, (Ground) ());
}
}
@Override
public boolean onLongClick(View v) {
if (mOnItemLongClickListener != null) {
// Method getTag which get data.
(v, (Ground) ());
}
return true;
}
public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
= listener;
}
public void setOnItemLongClickListener(OnRecyclerViewItemLongClickListener listener) {
= listener;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// If inflate(.list_item_record,parent,false) is not written like this, the cardview will not be wide View view = (context).inflate(.basic_config_choose_item, parent, false);
// Register click event for the created View (this);
(this);
return new ViewHolder(view);
}
@SuppressLint("ClickableViewAccessibility")
@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {
final Ground ground = (position);
// Store the data in itemView tag for clicking (ground);
// Value (());
switch (viewStateReceive) {
case 0:
// Select No if (selectPosition == position) {
(true);
} else {
(false);
}
// CheckBox
(new () {
@Override
public void onClick(View v) {
if (selectPosition == ()) {
// Select Cancel setSelectPosition(-1);
(ground, false);
} else {
// If not selected, select setSelectPosition(());
(ground, true);
}
notifyDataSetChanged();
}
});
// ConvertView
(new () {
@Override
public void onClick(View v) {
if (selectPosition == ()) {
// Select Cancel setSelectPosition(-1);
(ground, false);
} else {
// If not selected, select setSelectPosition(());
(ground, true);
}
notifyDataSetChanged();
}
});
break;
case 1:
();
();
break;
default:
break;
}
(new () {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (()) {
case MotionEvent.ACTION_DOWN:
(holder);
break;
default:
break;
}
return false;
}
});
}
@Override
public void onItemMove(int fromPosition, int toPosition) {
if (fromPosition < toPosition) {
for (int i = fromPosition; i < toPosition; i++) {
(groundList, i, i + 1);
}
} else {
for (int i = fromPosition; i > toPosition; i--) {
(groundList, i, i - 1);
}
}
notifyItemMoved(fromPosition, toPosition);
}
@Override
public void onItemSlideSlipEnd(int position) {
Ground ground = (position);
switch (()) {
case 1:
notifyItemRemoved(position);
(position);
notifyItemRangeChanged(0, getItemCount());
();
break;
default:
notifyItemRangeChanged(0, getItemCount());
(());
break;
}
}
public interface OnRecyclerViewItemClickListener {
/**
* Shorter
*
* @param view view
* @param ground data
*/
void onItemClick(View view, Ground ground);
/**
* Short point (select)
*
* @param ground data
* @param choose No
*/
void onItemChoose(Ground ground, boolean choose);
}
public interface OnRecyclerViewItemLongClickListener {
/**
* Longer
*
* @param view view
* @param ground data
*/
void onItemLongClick(View view, Ground ground);
}
/**
* Custom ViewHolder (holds all elements per Item page)
*/
class ViewHolder extends implements ItemTouchHelperViewHolder {
@BindView()
LinearLayout llBasicConfigChoose;
@BindView()
TextView tvBasicConfigChoose;
@BindView()
ImageView ivBasicConfigChoose;
@BindView()
CheckBox cbBasicConfigChoose;
ViewHolder(final View view) {
super(view);
(this, view);
}
@Override
public void onItemSlideSlipStart(Context context) {
((context, ));
((context, ));
((context, ), .SRC_IN);
}
@Override
public void onItemSlideSlipStop(Context context) {
((context, ));
((context, ));
((context, ), .SRC_IN);
}
}
}
Main code
package ;
import ;
import ;
import ;
import ;
import .;
import .;
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import ;
import ;
import ;
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import ;
/**
* Created on 2018/6/27.
*
* @author Zheng Shaopeng
* @desc Parameter Configuration Selection (Stratigraphic)
*/
public class ParaConfigChooseGroundAdapter extends <> implements , , ItemTouchHelperAdapter {
private Context context;
private List<Ground> groundList;
private int viewStateReceive;
private OnRecyclerViewItemClickListener mOnItemClickListener;
private OnRecyclerViewItemLongClickListener mOnItemLongClickListener;
private final ItemDragListener dragStartListener;
private int selectPosition = -1;
/**
* constructor
*
* @param context context
* @param viewState view shape (0 select 1 without selection)
* @param dragStartListener Drag and listen
*/
public ParaConfigChooseGroundAdapter(Context context, int viewState, ItemDragListener dragStartListener) {
= context;
= dragStartListener;
groundList = new ArrayList<>();
viewStateReceive = viewState;
}
private void setSelectPosition(int selectPosition) {
= selectPosition;
}
public void setParaConfigChooseGroundData(List<Ground> list) {
= list;
}
@Override
public int getItemCount() {
if (groundList != null && () > 0) {
return ();
}
return 0;
}
@Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
// Method getTag which get data.
(v, (Ground) ());
}
}
@Override
public boolean onLongClick(View v) {
if (mOnItemLongClickListener != null) {
// Method getTag which get data.
(v, (Ground) ());
}
return true;
}
public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
= listener;
}
public void setOnItemLongClickListener(OnRecyclerViewItemLongClickListener listener) {
= listener;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// If inflate(.list_item_record,parent,false) is not written like this, the cardview will not be wide View view = (context).inflate(.basic_config_choose_item, parent, false);
// Register click event for the created View (this);
(this);
return new ViewHolder(view);
}
@SuppressLint("ClickableViewAccessibility")
@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {
final Ground ground = (position);
// Store the data in itemView tag for clicking (ground);
// Value (());
switch (viewStateReceive) {
case 0:
// Select No if (selectPosition == position) {
(true);
} else {
(false);
}
// CheckBox
(new () {
@Override
public void onClick(View v) {
if (selectPosition == ()) {
// Select Cancel setSelectPosition(-1);
(ground, false);
} else {
// If not selected, select setSelectPosition(());
(ground, true);
}
notifyDataSetChanged();
}
});
// ConvertView
(new () {
@Override
public void onClick(View v) {
if (selectPosition == ()) {
// Select Cancel setSelectPosition(-1);
(ground, false);
} else {
// If not selected, select setSelectPosition(());
(ground, true);
}
notifyDataSetChanged();
}
});
break;
case 1:
();
();
break;
default:
break;
}
(new () {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (()) {
case MotionEvent.ACTION_DOWN:
(holder);
break;
default:
break;
}
return false;
}
});
}
@Override
public void onItemMove(int fromPosition, int toPosition) {
if (fromPosition < toPosition) {
for (int i = fromPosition; i < toPosition; i++) {
(groundList, i, i + 1);
}
} else {
for (int i = fromPosition; i > toPosition; i--) {
(groundList, i, i - 1);
}
}
notifyItemMoved(fromPosition, toPosition);
}
@Override
public void onItemSlideSlipEnd(int position) {
Ground ground = (position);
switch (()) {
case 1:
notifyItemRemoved(position);
(position);
notifyItemRangeChanged(0, getItemCount());
();
break;
default:
notifyItemRangeChanged(0, getItemCount());
(());
break;
}
}
public interface OnRecyclerViewItemClickListener {
/**
* Shorter
*
* @param view view
* @param ground data
*/
void onItemClick(View view, Ground ground);
/**
* Short point (select)
*
* @param ground data
* @param choose No
*/
void onItemChoose(Ground ground, boolean choose);
}
public interface OnRecyclerViewItemLongClickListener {
/**
* Longer
*
* @param view view
* @param ground data
*/
void onItemLongClick(View view, Ground ground);
}
/**
* Custom ViewHolder (holds all elements per Item page)
*/
class ViewHolder extends implements ItemTouchHelperViewHolder {
@BindView()
LinearLayout llBasicConfigChoose;
@BindView()
TextView tvBasicConfigChoose;
@BindView()
ImageView ivBasicConfigChoose;
@BindView()
CheckBox cbBasicConfigChoose;
ViewHolder(final View view) {
super(view);
(this, view);
}
@Override
public void onItemSlideSlipStart(Context context) {
((context, ));
((context, ));
((context, ), .SRC_IN);
}
@Override
public void onItemSlideSlipStop(Context context) {
((context, ));
((context, ));
((context, ), .SRC_IN);
}
}
}
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.