RecyclerView交互动画主要使用的是ItemTouchHelper这个类
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)
@Override
public 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0
int 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
@Override
public boolean isLongPressDragEnabled() {
return true;
}
//移动的时候回调的方法(拖拽等)
@Override
public 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
@Override
public 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
@Override
public 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
@Override
public 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);//1~0
viewHolder.itemView.setScaleY(1);//1~0
super.clearView(recyclerView, viewHolder);
}
//在拖拽的时候做效果
@Override
public 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.getWidth
float 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);//1~0
viewHolder.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);
}
}
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 implements ItemTouchMoveCallback {
private Context mContext;
private List mLists;
private StartDragCallback mCallback;
public MainAdapter(Context context, List lists, StartDragCallback callback) {
this.mContext = context;
this.mLists = lists;
this.mCallback = callback;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.item_main, parent, false);
return new ViewHolder(view);
}
@Override
public 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() {
@Override
public 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;
}
});
}
@Override
public boolean onItemMove(int fromPosition, int toPosition) {
//1.数据交换;2.刷新
Collections.swap(mLists, fromPosition, toPosition);
notifyItemMoved(fromPosition, toPosition);
return true;
}
@Override
public boolean onItemRemove(int position) {
//1.删除数据,2.刷新
mLists.remove(position);
notifyItemRemoved(position);
return true;
}
@Override
public 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);
}
}
}
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 list = new ArrayList<>();
private ItemTouchHelper itemTouchHelper;
@Override
protected 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
*/
@Override
public 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);
}
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)
@Override
public 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0
int 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
@Override
public boolean isLongPressDragEnabled() {
return true;
}
//移动的时候回调的方法(拖拽等)
@Override
public 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
@Override
public 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
@Override
public 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
@Override
public 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);//1~0
viewHolder.itemView.setScaleY(1);//1~0
super.clearView(recyclerView, viewHolder);
}
//在拖拽的时候做效果
@Override
public 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.getWidth
float 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);//1~0
viewHolder.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]