RecyclerView实现侧滑拖拽功能
本文实例为大家分享了RecyclerView实现侧滑拖拽功能的具体代码，供大家参考，具体内容如下
准备
ItemDragListener
package slideslipdrag;
import android.support.v7.widget.RecyclerView;
/**
* Created on 2018/7/22.
*
* @desc ItemDragListener
*/
public interface ItemDragListener {
/**
* 拖拽
*
* @param viewHolder viewHolder
*/
void onStartDrag(RecyclerView.ViewHolder viewHolder);
}
ItemTouchHelperAdapter
package slideslipdrag;
/**
* @decs: ItemTouchHelperAdapter
* @date: 2018/7/22 13:23
* @version: v 1.0
*/
public interface ItemTouchHelperAdapter {
/**
* 移动
*
* @param fromPosition 起始位
* @param toPosition 终止位
*/
void onItemMove(int fromPosition, int toPosition);
/**
* 侧滑结束
*
* @param position 位置
*/
void onItemSlideSlipEnd(int position);
}
ItemTouchHelperViewHolder
package slideslipdrag;
import android.content.Context;
/**
* @decs: ItemTouchHelperViewHolder
* @date: 2018/7/22 13:24
* @version: v 1.0
*/
public interface ItemTouchHelperViewHolder {
/**
* 侧滑开始
*
* @param context 上下文
*/
void onItemSlideSlipStart(Context context);
/**
* 侧滑停止
*
* @param context 上下文
*/
void onItemSlideSlipStop(Context context);
}
SimpleItemTouchHelperCallback
package slideslipdrag;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;
import android.view.View;
import com.self.zsp.dfs.R;
import util.DensityUtils;
/**
* @decs: SimpleItemTouchHelperCallback
* @date: 2018/7/22 13:34
* @version: v 1.0
*/
public class SimpleItemTouchHelperCallback extends ItemTouchHelper.Callback {
private final ItemTouchHelperAdapter mAdapter;
private Context context;
private Paint paint = new Paint();
public SimpleItemTouchHelperCallback(ItemTouchHelperAdapter adapter, Context context) {
mAdapter = adapter;
this.context = context;
}
@Override
public boolean isLongPressDragEnabled() {
return false;
}
@Override
public boolean isItemViewSwipeEnabled() {
return true;
}
@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
// Enable drag up and down and right swipe in right direction
final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
final int swipeFlags = ItemTouchHelper.END;
// final int swipeFlags = ItemTouchHelper.END | ItemTouchHelper.START; 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, RecyclerView.ViewHolder source, RecyclerView.ViewHolder target) {
if (source.getItemViewType() != target.getItemViewType()) {
return false;
}
// Notify the adapter of the move
mAdapter.onItemMove(source.getAdapterPosition(), target.getAdapterPosition());
return true;
}
@Override
public void onChildDrawOver(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
super.onChildDrawOver(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
@Override
public void onSwiped(final RecyclerView.ViewHolder viewHolder, int i) {
// Notify the adapter of the dismissal
mAdapter.onItemSlideSlipEnd(viewHolder.getAdapterPosition());
}
@Override
public int getBoundingBoxMargin() {
return super.getBoundingBoxMargin();
}
@Override
public void onChildDraw(final Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
super.onChildDraw(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 = viewHolder.itemView;
Bitmap icon;
if (dX > 0) {
icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.delete);
// Set color for right swipe
paint.setColor(ContextCompat.getColor(context, R.color.red));
// Draw Rect with varying right side, equal to displacement dX
c.drawRect((float) itemView.getLeft() + DensityUtils.dpToPxFour(0), (float) itemView.getTop(), dX + DensityUtils.dpToPxFour(0),
(float) itemView.getBottom(), paint);
// Set the image icon for right swipe
c.drawBitmap(icon, (float) itemView.getLeft() + DensityUtils.dpToPxFour(16), (float) itemView.getTop() +
((float) itemView.getBottom() - (float) itemView.getTop() - icon.getHeight()) / 2, paint);
icon.recycle();
}
}
}
@Override
public void onSelectedChanged(RecyclerView.ViewHolder 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;
itemViewHolder.onItemSlideSlipStart(context);
}
super.onSelectedChanged(viewHolder, actionState);
/*final boolean swiping = actionState == ItemTouchHelper.ACTION_STATE_SWIPE;
swipeRefreshLayout.setEnabled(!swiping);*/
}
@Override
public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
super.clearView(recyclerView, viewHolder);
// Tell the view holder it's time to restore the idle state
ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
itemViewHolder.onItemSlideSlipStop(context);
}
@Override
public float getMoveThreshold(RecyclerView.ViewHolder viewHolder) {
/*return super.getMoveThreshold(viewHolder);*/
return 0.1f;
/*return super.getMoveThreshold(0.5f);*/
}
@Override
public float getSwipeThreshold(RecyclerView.ViewHolder viewHolder) {
/*if (viewHolder instanceof RecyclerView.ViewHolder) {
return 1f;
}
return super.getSwipeThreshold(viewHolder);*/
return 0.9f;
}
}
使用
布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/llBasicConfigChoose"
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:id="@+id/tvBasicConfigChoose"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:textColor="@color/fontInput"
android:textSize="@dimen/s14"
tools:text="第一项目部" />
<ImageView
android:id="@+id/ivBasicConfigChoose"
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:id="@+id/cbBasicConfigChoose"
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>
适配器
package adapter.parameterconfiguration;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.PorterDuff;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.self.zsp.dfs.R;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import entity.sync.Ground;
import butterknife.BindView;
import butterknife.ButterKnife;
import slideslipdrag.ItemDragListener;
import slideslipdrag.ItemTouchHelperAdapter;
import slideslipdrag.ItemTouchHelperViewHolder;
import util.ToastUtils;
/**
* Created on 2018/6/27.
*
* @desc 参数配置选择（地层）
*/
public class ParaConfigChooseGroundAdapter extends RecyclerView.Adapter<ParaConfigChooseGroundAdapter.ViewHolder> implements View.OnClickListener, View.OnLongClickListener, 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 上下文
* @param viewState 视图状（0选择1无选择）
* @param dragStartListener 拖拽监听
*/
public ParaConfigChooseGroundAdapter(Context context, int viewState, ItemDragListener dragStartListener) {
this.context = context;
this.dragStartListener = dragStartListener;
groundList = new ArrayList<>();
viewStateReceive = viewState;
}
private void setSelectPosition(int selectPosition) {
this.selectPosition = selectPosition;
}
public void setParaConfigChooseGroundData(List<Ground> list) {
this.groundList = list;
}
@Override
public int getItemCount() {
if (groundList != null && groundList.size() > 0) {
return groundList.size();
}
return 0;
}
@Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
// Method getTag which get data.
mOnItemClickListener.onItemClick(v, (Ground) v.getTag());
}
}
@Override
public boolean onLongClick(View v) {
if (mOnItemLongClickListener != null) {
// Method getTag which get data.
mOnItemLongClickListener.onItemLongClick(v, (Ground) v.getTag());
}
return true;
}
public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
this.mOnItemClickListener = listener;
}
public void setOnItemLongClickListener(OnRecyclerViewItemLongClickListener listener) {
this.mOnItemLongClickListener = listener;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// inflate(R.layout.list_item_record,parent,false)不这么写则cardview不适宽
View view = LayoutInflater.from(context).inflate(R.layout.basic_config_choose_item, parent, false);
// 为所创View注册点击事件
view.setOnClickListener(this);
view.setOnLongClickListener(this);
return new ViewHolder(view);
}
@SuppressLint("ClickableViewAccessibility")
@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {
final Ground ground = groundList.get(position);
// 数据存itemView之Tag以便点获
holder.itemView.setTag(ground);
// 值
holder.tvBasicConfigChoose.setText(ground.getDcmc());
switch (viewStateReceive) {
case 0:
// 选否
if (selectPosition == position) {
holder.cbBasicConfigChoose.setChecked(true);
} else {
holder.cbBasicConfigChoose.setChecked(false);
}
// CheckBox
holder.cbBasicConfigChoose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (selectPosition == holder.getAdapterPosition()) {
// 选则取消
setSelectPosition(-1);
mOnItemClickListener.onItemChoose(ground, false);
} else {
// 未选则选
setSelectPosition(holder.getAdapterPosition());
mOnItemClickListener.onItemChoose(ground, true);
}
notifyDataSetChanged();
}
});
// ConvertView
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (selectPosition == holder.getAdapterPosition()) {
// 选则取消
setSelectPosition(-1);
mOnItemClickListener.onItemChoose(ground, false);
} else {
// 未选则选
setSelectPosition(holder.getAdapterPosition());
mOnItemClickListener.onItemChoose(ground, true);
}
notifyDataSetChanged();
}
});
break;
case 1:
holder.cbBasicConfigChoose.setVisibility(View.INVISIBLE);
holder.ivBasicConfigChoose.setVisibility(View.VISIBLE);
break;
default:
break;
}
holder.ivBasicConfigChoose.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
dragStartListener.onStartDrag(holder);
break;
default:
break;
}
return false;
}
});
}
@Override
public void onItemMove(int fromPosition, int toPosition) {
if (fromPosition < toPosition) {
for (int i = fromPosition; i < toPosition; i++) {
Collections.swap(groundList, i, i + 1);
}
} else {
for (int i = fromPosition; i > toPosition; i--) {
Collections.swap(groundList, i, i - 1);
}
}
notifyItemMoved(fromPosition, toPosition);
}
@Override
public void onItemSlideSlipEnd(int position) {
Ground ground = groundList.get(position);
switch (ground.getLocalAdd()) {
case 1:
notifyItemRemoved(position);
groundList.remove(position);
notifyItemRangeChanged(0, getItemCount());
ground.delete();
break;
default:
notifyItemRangeChanged(0, getItemCount());
ToastUtils.shortShow(context.getString(R.string.localMaintainedDataDeleteHint));
break;
}
}
public interface OnRecyclerViewItemClickListener {
/**
* 短点
*
* @param view 视图
* @param ground 数据
*/
void onItemClick(View view, Ground ground);
/**
* 短点（选）
*
* @param ground 数据
* @param choose 选否
*/
void onItemChoose(Ground ground, boolean choose);
}
public interface OnRecyclerViewItemLongClickListener {
/**
* 长点
*
* @param view 视图
* @param ground 数据
*/
void onItemLongClick(View view, Ground ground);
}
/**
* 自定ViewHolder（持每Item页全元素）
*/
class ViewHolder extends RecyclerView.ViewHolder implements ItemTouchHelperViewHolder {
@BindView(R.id.llBasicConfigChoose)
LinearLayout llBasicConfigChoose;
@BindView(R.id.tvBasicConfigChoose)
TextView tvBasicConfigChoose;
@BindView(R.id.ivBasicConfigChoose)
ImageView ivBasicConfigChoose;
@BindView(R.id.cbBasicConfigChoose)
CheckBox cbBasicConfigChoose;
ViewHolder(final View view) {
super(view);
ButterKnife.bind(this, view);
}
@Override
public void onItemSlideSlipStart(Context context) {
llBasicConfigChoose.setBackgroundColor(ContextCompat.getColor(context, R.color.blue));
tvBasicConfigChoose.setTextColor(ContextCompat.getColor(context, R.color.background));
ivBasicConfigChoose.setColorFilter(ContextCompat.getColor(context, R.color.background), PorterDuff.Mode.SRC_IN);
}
@Override
public void onItemSlideSlipStop(Context context) {
llBasicConfigChoose.setBackgroundColor(ContextCompat.getColor(context, R.color.background));
tvBasicConfigChoose.setTextColor(ContextCompat.getColor(context, R.color.fontInput));
ivBasicConfigChoose.setColorFilter(ContextCompat.getColor(context, R.color.blue), PorterDuff.Mode.SRC_IN);
}
}
}
主代码
package adapter.parameterconfiguration;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.PorterDuff;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.self.zsp.dfs.R;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import entity.sync.Ground;
import butterknife.BindView;
import butterknife.ButterKnife;
import slideslipdrag.ItemDragListener;
import slideslipdrag.ItemTouchHelperAdapter;
import slideslipdrag.ItemTouchHelperViewHolder;
import util.ToastUtils;
/**
* Created on 2018/6/27.
*
* @author 郑少鹏
* @desc 参数配置选择（地层）
*/
public class ParaConfigChooseGroundAdapter extends RecyclerView.Adapter<ParaConfigChooseGroundAdapter.ViewHolder> implements View.OnClickListener, View.OnLongClickListener, 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 上下文
* @param viewState 视图状（0选择1无选择）
* @param dragStartListener 拖拽监听
*/
public ParaConfigChooseGroundAdapter(Context context, int viewState, ItemDragListener dragStartListener) {
this.context = context;
this.dragStartListener = dragStartListener;
groundList = new ArrayList<>();
viewStateReceive = viewState;
}
private void setSelectPosition(int selectPosition) {
this.selectPosition = selectPosition;
}
public void setParaConfigChooseGroundData(List<Ground> list) {
this.groundList = list;
}
@Override
public int getItemCount() {
if (groundList != null && groundList.size() > 0) {
return groundList.size();
}
return 0;
}
@Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
// Method getTag which get data.
mOnItemClickListener.onItemClick(v, (Ground) v.getTag());
}
}
@Override
public boolean onLongClick(View v) {
if (mOnItemLongClickListener != null) {
// Method getTag which get data.
mOnItemLongClickListener.onItemLongClick(v, (Ground) v.getTag());
}
return true;
}
public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
this.mOnItemClickListener = listener;
}
public void setOnItemLongClickListener(OnRecyclerViewItemLongClickListener listener) {
this.mOnItemLongClickListener = listener;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// inflate(R.layout.list_item_record,parent,false)不这么写则cardview不适宽
View view = LayoutInflater.from(context).inflate(R.layout.basic_config_choose_item, parent, false);
// 为所创View注册点击事件
view.setOnClickListener(this);
view.setOnLongClickListener(this);
return new ViewHolder(view);
}
@SuppressLint("ClickableViewAccessibility")
@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {
final Ground ground = groundList.get(position);
// 数据存itemView之Tag以便点获
holder.itemView.setTag(ground);
// 值
holder.tvBasicConfigChoose.setText(ground.getDcmc());
switch (viewStateReceive) {
case 0:
// 选否
if (selectPosition == position) {
holder.cbBasicConfigChoose.setChecked(true);
} else {
holder.cbBasicConfigChoose.setChecked(false);
}
// CheckBox
holder.cbBasicConfigChoose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (selectPosition == holder.getAdapterPosition()) {
// 选则取消
setSelectPosition(-1);
mOnItemClickListener.onItemChoose(ground, false);
} else {
// 未选则选
setSelectPosition(holder.getAdapterPosition());
mOnItemClickListener.onItemChoose(ground, true);
}
notifyDataSetChanged();
}
});
// ConvertView
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (selectPosition == holder.getAdapterPosition()) {
// 选则取消
setSelectPosition(-1);
mOnItemClickListener.onItemChoose(ground, false);
} else {
// 未选则选
setSelectPosition(holder.getAdapterPosition());
mOnItemClickListener.onItemChoose(ground, true);
}
notifyDataSetChanged();
}
});
break;
case 1:
holder.cbBasicConfigChoose.setVisibility(View.INVISIBLE);
holder.ivBasicConfigChoose.setVisibility(View.VISIBLE);
break;
default:
break;
}
holder.ivBasicConfigChoose.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
dragStartListener.onStartDrag(holder);
break;
default:
break;
}
return false;
}
});
}
@Override
public void onItemMove(int fromPosition, int toPosition) {
if (fromPosition < toPosition) {
for (int i = fromPosition; i < toPosition; i++) {
Collections.swap(groundList, i, i + 1);
}
} else {
for (int i = fromPosition; i > toPosition; i--) {
Collections.swap(groundList, i, i - 1);
}
}
notifyItemMoved(fromPosition, toPosition);
}
@Override
public void onItemSlideSlipEnd(int position) {
Ground ground = groundList.get(position);
switch (ground.getLocalAdd()) {
case 1:
notifyItemRemoved(position);
groundList.remove(position);
notifyItemRangeChanged(0, getItemCount());
ground.delete();
break;
default:
notifyItemRangeChanged(0, getItemCount());
ToastUtils.shortShow(context.getString(R.string.localMaintainedDataDeleteHint));
break;
}
}
public interface OnRecyclerViewItemClickListener {
/**
* 短点
*
* @param view 视图
* @param ground 数据
*/
void onItemClick(View view, Ground ground);
/**
* 短点（选）
*
* @param ground 数据
* @param choose 选否
*/
void onItemChoose(Ground ground, boolean choose);
}
public interface OnRecyclerViewItemLongClickListener {
/**
* 长点
*
* @param view 视图
* @param ground 数据
*/
void onItemLongClick(View view, Ground ground);
}
/**
* 自定ViewHolder（持每Item页全元素）
*/
class ViewHolder extends RecyclerView.ViewHolder implements ItemTouchHelperViewHolder {
@BindView(R.id.llBasicConfigChoose)
LinearLayout llBasicConfigChoose;
@BindView(R.id.tvBasicConfigChoose)
TextView tvBasicConfigChoose;
@BindView(R.id.ivBasicConfigChoose)
ImageView ivBasicConfigChoose;
@BindView(R.id.cbBasicConfigChoose)
CheckBox cbBasicConfigChoose;
ViewHolder(final View view) {
super(view);
ButterKnife.bind(this, view);
}
@Override
public void onItemSlideSlipStart(Context context) {
llBasicConfigChoose.setBackgroundColor(ContextCompat.getColor(context, R.color.blue));
tvBasicConfigChoose.setTextColor(ContextCompat.getColor(context, R.color.background));
ivBasicConfigChoose.setColorFilter(ContextCompat.getColor(context, R.color.background), PorterDuff.Mode.SRC_IN);
}
@Override
public void onItemSlideSlipStop(Context context) {
llBasicConfigChoose.setBackgroundColor(ContextCompat.getColor(context, R.color.background));
tvBasicConfigChoose.setTextColor(ContextCompat.getColor(context, R.color.fontInput));
ivBasicConfigChoose.setColorFilter(ContextCompat.getColor(context, R.color.blue), PorterDuff.Mode.SRC_IN);
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。
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在平时开发应用的时候,经常会遇到列表排序.滑动删除的需求.如果列表效果采用的是 ListView 的话,需要经过自定义 View 才能实现效果:但是如果采用的是 RecyclerView 的话,系统 API 就已经为我们提供了相应的功能. 接下来,我们就来看一下怎么用系统 API 来实现排序和删除的效果. 创建 ItemTouchHelper 创建一个 ItemTouchHelper 对象,然后其调用 attachToRecyclerView 方法: RecyclerView recyclerV
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RecyclerView进阶：使用ItemTouchHelper实现拖拽和侧滑删除效果
前言 现在RecyclerView的应用越来越广泛了,不同的应用场景需要其作出不同的改变.有时候我们可能需要实现侧滑删除的功能,比如知乎首页的侧滑删除,又或者长按Item进行拖动与其他Item进行位置的交换,但RecyclerView没有提供现成的API供我们操作,所幸SDK提供了ItemTouchHelper这样一个工具类帮助我们快速实现以上功能.不多说别的,我们来介绍一下ItemTouchHelper. 什么是ItemTouchHelper This is a utility class t
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RecyclerView实现侧滑拖拽功能
本文实例为大家分享了RecyclerView实现侧滑拖拽功能的具体代码,供大家参考,具体内容如下 准备 ItemDragListener package slideslipdrag; import android.support.v7.widget.RecyclerView; /** * Created on 2018/7/22. * * @desc ItemDragListener */ public interface ItemDragListener { /** * 拖拽 * * @par
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Android利用RecyclerView实现全选、置顶和拖拽功能示例
前言 今天给大家分享是如何在RecyclerView实现全选,ItemTouchHelper实现侧滑删除,拖拽功能.比较基础.关于RecyclerView的强大,就不多说了.在Android L SDK发布的新API中最有意思的就是RecyclerView 和 CardView了, 按照官方的说法, RecyclerView 一个ListView 的一个更高级更灵活的一个版本, 可以自定义的东西太多了. 效果: RecyclerView实现全选,ItemTouchHelper实现侧滑删除,拖拽功
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Android中RecyclerView实现滑动删除与拖拽功能
前言 从Android 5.0开始,谷歌推出了新的控件RecyclerView,相对于早它之前的ListView,优点多多,功能强大,也给我们的开发着提供了极大的便利,今天自己学习一下RecyclerView轻松实现滑动删除及拖拽的效果. 如下图. 相信研究过RecyclerView的同学,应该很清楚该怎么实现这样的效果,若是用ListView,这样的效果实现起来可能就有点麻烦,但是在强大的RecyclerView面前这样的的效果只需很少的代码,因为谷歌给我们提供了强大的工具类ItemTouch
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Android用RecyclerView实现图标拖拽排序以及增删管理
1. 效果图 2. 基本的功能 在非编辑状态下可以直接点击图标进行跳转 在编辑状态可以拖拽.添加.删除操作 已被添加过的不能再次添加 3. 实现的思路 用两个RecyclerView实现,同时维护两个数据源,上部是常用应用,最多可以放8个:下部是全部应用. 1. 每个应用图标的状态用枚举Option表示 // 当前的操作状态 enum class Option { ADD, REMOVE, NONE } 2. 在处于编辑状态时创建ItemTouchHelper对象并attch到RecyclerV
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JS基于面向对象实现的拖拽功能示例
本文实例讲述了JS基于面向对象实现的拖拽功能.分享给大家供大家参考,具体如下: <html xmlns="http://www.w3.org/1999/xhtml"> <head> <style> #div1 {width:100px; height:100px; background:red; position:absolute;} #div2 {width:100px; height:100px; background:yellow; posit
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java swing中实现拖拽功能示例
java实现拖拽示例 Swing中实现拖拽功能,代码很简单,都有注释,自己看,运行效果如下图: 复制代码 代码如下: package com; import java.awt.*;import java.awt.datatransfer.DataFlavor;import java.awt.dnd.DnDConstants;import java.awt.dnd.DropTarget;import java.awt.dnd.DropTargetAdapter;import java.awt.dn
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Swift下使用UICollectionView 实现长按拖拽功能
导读 简单用Swift写了一个collectionview的拖拽点击排序效果; 拖拽排序是新闻类的App可以说是必有的交互设计,如今日头条,网易新闻等. GitHub地址:https://github.com/wangliujiayou/Swift-dragLabel 欢迎Star. 效果 主要代码 手势长按移动 1.给CollectionViewCell添加一个长按手势. private lazy var collectionView: UICollectionView = { let clv
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原生js实现弹出层登录拖拽功能
在WEB开发过程中,总会遇到一些从未接触过的需求,总是想尽一切办法去研究,最终实现效果,在实现效果的那一刻成就感爆棚,有木有? 留言墙.弹出框等一些常见地方都有拖拽功能,方便用户体验嘛. 实现拖拽功能 ,三个事件 mousemove , mouseup ,mousedown, 偏移量(offsetLeft, offsetTop , offsetWidth ,offsetHeight),窗口坐标位置(clientX ,clientY ) 以及获取可视区域方法的兼容性处理. 之前做的比较多的留言墙效
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基于JavaScript实现右键菜单和拖拽功能
下面先给大家介绍下js实现的右键菜单功能,具体详情如下所示: 这一章解决的问题 1.实现右键菜单功能代码. 2.阻止默认事件的实际应用. <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>右键菜单</title> <style type="text/css"> #menu {
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vue2.0使用Sortable.js实现的拖拽功能示例
简介 在使用vue1.x之前的版本的时候,页面中的拖拽功能,我在项目中是直接用的jquery ui中的sortable.js,只是在拖拽完成后,在update的回调函数中又重新排序了存放数据的数组.但是当把vue升级到2.0以上后发现拖拽功能失效了,于是使用了下面代码. 该案例主要是在用于vuejs2.0中实现的拖拽功能,用到的的js有Sortable.js,vuedraggable.js,当然还有vue.min.js,提供的案例使用的require.js加载. 实现效果 实现后的效果如图所示: