android：RecyclerView交互动画（上下拖动，左右滑动删除）

效果

RecyclerView交互动画主要使用的是ItemTouchHelper这个类

创建MyItemTouchHelperCallback继承系统ItemTouchHelper.Callback

import android.graphics.Canvas;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;import tsou.cn.studyrecycler.R;/*** Created by Administrator on 2018/10/11 0011.*/public class MyItemTouchHelperCallback extends ItemTouchHelper.Callback {private ItemTouchMoveCallback mMoveCallback;public MyItemTouchHelperCallback(ItemTouchMoveCallback callback) {this.mMoveCallback = callback;}//Callback回调监听时先调用的，用来判断当前是什么动作，比如判断方向（监听哪个方向的拖动）@Overridepublic int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {//放向：up、down、left、right//常量：
//        int up = ItemTouchHelper.UP;//1  0x0001
//        int down = ItemTouchHelper.DOWN;//2 0x0010
//        int left = ItemTouchHelper.LEFT;
//        int right = ItemTouchHelper.RIGHT;//要监听的拖拽方向，不监听为0int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;//要监听的侧滑方向，不监听为0
//        int swipeFlags = 0;int swipeFlags = ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;int flags = makeMovementFlags(dragFlags, swipeFlags);return flags;//即监听向上也监听向下}//是否允许长按拖拽@Overridepublic boolean isLongPressDragEnabled() {return true;}//移动的时候回调的方法（拖拽等）@Overridepublic boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {if (viewHolder.getItemViewType() != target.getItemViewType()) {return false;}//在拖拽的过程中不断地调用adapter.notifyItemMoved(from,to)mMoveCallback.onItemMove(viewHolder.getAdapterPosition(), target.getAdapterPosition());return true;}//侧滑的时候回调的方法@Overridepublic void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {//监听侧滑；1.删除数据，2.调用adapter.notifyItemRemoved(position)mMoveCallback.onItemRemove(viewHolder.getAdapterPosition());}//改变选中的Item@Overridepublic void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {//判断状态if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {viewHolder.itemView.findViewById(R.id.textview).setBackgroundColor(viewHolder.itemView.getContext().getResources().getColor(R.color.black));}super.onSelectedChanged(viewHolder, actionState);}//恢复改变选中的Item@Overridepublic void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {//恢复viewHolder.itemView.findViewById(R.id.textview).setBackgroundColor(viewHolder.itemView.getContext().getResources().getColor(R.color.colorPrimary));//透明度动画viewHolder.itemView.setAlpha(1);//1~0//缩放动画viewHolder.itemView.setScaleX(1);//1~0viewHolder.itemView.setScaleY(1);//1~0super.clearView(recyclerView, viewHolder);}//在拖拽的时候做效果@Overridepublic void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {//dx  水平方向移动的增量（负：向左；正：向右）范围：0~View.getWidthfloat alpha=1 - Math.abs(dX) / viewHolder.itemView.getWidth();if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {//透明度动画viewHolder.itemView.setAlpha(alpha);//1~0//缩放动画viewHolder.itemView.setScaleX(alpha);//1~0viewHolder.itemView.setScaleY(alpha);//1~0}
//        if (alpha==0){
//            //透明度动画
//            viewHolder.itemView.setAlpha(1);//1~0
//            //缩放动画
//            viewHolder.itemView.setScaleX(1);//1~0
//            viewHolder.itemView.setScaleY(1);//1~0
//        }super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);}
}

MainAdapter

import android.content.Context;
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.ImageView;
import android.widget.TextView;import java.util.Collections;
import java.util.List;import tsou.cn.studyrecycler.R;
import tsou.cn.studyrecycler.callback.ItemTouchMoveCallback;
import tsou.cn.studyrecycler.callback.StartDragCallback;/*** Created by Administrator on 2017/7/11 0011.*/public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> implements ItemTouchMoveCallback {private Context mContext;private List<String> mLists;private StartDragCallback mCallback;public MainAdapter(Context context, List<String> lists, StartDragCallback callback) {this.mContext = context;this.mLists = lists;this.mCallback = callback;}@Overridepublic ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {View view = LayoutInflater.from(mContext).inflate(R.layout.item_main, parent, false);return new ViewHolder(view);}@Overridepublic void onBindViewHolder(final ViewHolder holder, int position) {holder.mTextview.setText(mLists.get(position));//解决触摸移动holder.mImageview.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {if (event.getAction() == MotionEvent.ACTION_DOWN) {//传递触摸情况（触摸移动）mCallback.onStartDrag(holder);}return false;}});}@Overridepublic boolean onItemMove(int fromPosition, int toPosition) {//1.数据交换；2.刷新Collections.swap(mLists, fromPosition, toPosition);notifyItemMoved(fromPosition, toPosition);return true;}@Overridepublic boolean onItemRemove(int position) {//1.删除数据,2.刷新mLists.remove(position);notifyItemRemoved(position);return true;}@Overridepublic int getItemCount() {return mLists.size();}class ViewHolder extends RecyclerView.ViewHolder {TextView mTextview;ImageView mImageview;ViewHolder(View view) {super(view);this.mTextview = (TextView) view.findViewById(R.id.textview);this.mImageview = (ImageView) view.findViewById(R.id.imageview);}}}

MainActivity


import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;import java.util.ArrayList;import tsou.cn.lib_hxgioc.HxgBind;
import tsou.cn.lib_hxgioc.HxgContentView;
import tsou.cn.lib_hxgioc.HxgViewUtils;
import tsou.cn.studyrecycler.adatper.MainAdapter;
import tsou.cn.studyrecycler.callback.MyItemTouchHelperCallback;
import tsou.cn.studyrecycler.callback.StartDragCallback;@HxgContentView(R.layout.activity_main)
public class MainActivity extends AppCompatActivity implements StartDragCallback {@HxgBind(R.id.recyclerView)private RecyclerView mRecyclerView;private ArrayList<String> list = new ArrayList<>();private ItemTouchHelper itemTouchHelper;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);HxgViewUtils.getView().inject(this);for (int i = 0; i < 100; i++) {list.add("huangxiaoguo" + i);}mRecyclerView.setLayoutManager(new LinearLayoutManager(this));MainAdapter adapter = new MainAdapter(this, list, this);mRecyclerView.setAdapter(adapter);//条目触摸帮助类ItemTouchHelper.Callback callback = new MyItemTouchHelperCallback(adapter);itemTouchHelper = new ItemTouchHelper(callback);itemTouchHelper.attachToRecyclerView(mRecyclerView);}/*** 解决触摸移动** @param viewHolder*/@Overridepublic void onStartDrag(RecyclerView.ViewHolder viewHolder) {itemTouchHelper.startDrag(viewHolder);}
}

-手指触摸上下滑动监听StartDragCallback


public interface StartDragCallback {public void onStartDrag(RecyclerView.ViewHolder viewHolder);
}

拖拽和侧滑回调 ItemTouchMoveCallback


import android.graphics.Canvas;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;import tsou.cn.studyrecycler.R;/*** Created by Administrator on 2018/10/11 0011.*/public class MyItemTouchHelperCallback extends ItemTouchHelper.Callback {private ItemTouchMoveCallback mMoveCallback;public MyItemTouchHelperCallback(ItemTouchMoveCallback callback) {this.mMoveCallback = callback;}//Callback回调监听时先调用的，用来判断当前是什么动作，比如判断方向（监听哪个方向的拖动）@Overridepublic int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {//放向：up、down、left、right//常量：
//        int up = ItemTouchHelper.UP;//1  0x0001
//        int down = ItemTouchHelper.DOWN;//2 0x0010
//        int left = ItemTouchHelper.LEFT;
//        int right = ItemTouchHelper.RIGHT;//要监听的拖拽方向，不监听为0int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;//要监听的侧滑方向，不监听为0
//        int swipeFlags = 0;int swipeFlags = ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;int flags = makeMovementFlags(dragFlags, swipeFlags);return flags;//即监听向上也监听向下}//是否允许长按拖拽@Overridepublic boolean isLongPressDragEnabled() {return true;}//移动的时候回调的方法（拖拽等）@Overridepublic boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {if (viewHolder.getItemViewType() != target.getItemViewType()) {return false;}//在拖拽的过程中不断地调用adapter.notifyItemMoved(from,to)mMoveCallback.onItemMove(viewHolder.getAdapterPosition(), target.getAdapterPosition());return true;}//侧滑的时候回调的方法@Overridepublic void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {//监听侧滑；1.删除数据，2.调用adapter.notifyItemRemoved(position)mMoveCallback.onItemRemove(viewHolder.getAdapterPosition());}//改变选中的Item@Overridepublic void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {//判断状态if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {viewHolder.itemView.findViewById(R.id.textview).setBackgroundColor(viewHolder.itemView.getContext().getResources().getColor(R.color.black));}super.onSelectedChanged(viewHolder, actionState);}//恢复改变选中的Item@Overridepublic void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {//恢复viewHolder.itemView.findViewById(R.id.textview).setBackgroundColor(viewHolder.itemView.getContext().getResources().getColor(R.color.colorPrimary));//透明度动画viewHolder.itemView.setAlpha(1);//1~0//缩放动画viewHolder.itemView.setScaleX(1);//1~0viewHolder.itemView.setScaleY(1);//1~0super.clearView(recyclerView, viewHolder);}//在拖拽的时候做效果@Overridepublic void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {//dx  水平方向移动的增量（负：向左；正：向右）范围：0~View.getWidthfloat alpha=1 - Math.abs(dX) / viewHolder.itemView.getWidth();if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {//透明度动画viewHolder.itemView.setAlpha(alpha);//1~0//缩放动画viewHolder.itemView.setScaleX(alpha);//1~0viewHolder.itemView.setScaleY(alpha);//1~0}
//        if (alpha==0){
//            //透明度动画
//            viewHolder.itemView.setAlpha(1);//1~0
//            //缩放动画
//            viewHolder.itemView.setScaleX(1);//1~0
//            viewHolder.itemView.setScaleY(1);//1~0
//        }super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);}
}

Demo地址：[https://download.csdn.net/download/huangxiaoguo1/10714254]

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