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Android ItemTouchHelper 实现账号历史记

Android ItemTouchHelper 实现账号历史记

作者: xq9527 | 来源:发表于2022-12-27 11:50 被阅读0次

    前言：

    各位同学大家好，有段时间没有给大家更新文章了，具体多久我也不记得了。因为最近在工作更新了一些新功能，用到了ItemTouchHelper 所以就记录一下

    效果图

    screenrecorder-2022-12-13-10-57-47-573[00_00_12--00_00_32].gif
    image.png
    image.png
    image.png

    具体实现 ：

    布局文件

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".LoginActivity">
    <LinearLayout
        android:layout_width="360dp"
        android:layout_height="360dp"
        android:layout_centerInParent="true"
        android:orientation="vertical"
        android:layout_gravity="center"
         android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:background="@drawable/activity_background_white">
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="56.89dp"
            android:background="@drawable/activity_head_background_gray">
            <TextView
                android:id="@+id/login_account_headlinetext"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/account_login"
                android:textSize="25.2dp"
                android:layout_centerInParent="true"
                android:textColor="@color/activityTitle"
                android:visibility="visible"
                />


            <RelativeLayout
                android:id="@+id/help_imageview_rl"
                android:layout_width="88.89dp"
                android:layout_height="match_parent"
                android:layout_alignParentRight="true"
                android:visibility="visible"
                >
                <ImageView
                    android:id="@+id/help_imageview"
                    android:layout_width="62.67dp"
                    android:layout_height="16.89dp"
                    android:src="@drawable/help"
                    android:layout_centerVertical="true"
                    android:layout_marginRight="20.44dp"
                    android:visibility="visible"
                    />
            </RelativeLayout>
        </RelativeLayout>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="122.58dp"
            android:layout_marginTop="7.64dp">

            <LinearLayout
                android:layout_width="300dp"
                android:layout_height="match_parent"
                android:orientation="vertical"
                android:layout_centerInParent="true">
                <!---->
                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="59.48dp"
                    android:focusable="true"
                    android:focusableInTouchMode="true"
                    >
                    <ImageView
                        android:layout_width="23.11dp"
                        android:layout_height="23.56dp"
                        android:src="@drawable/user_image"
                        android:id="@+id/user_icon_image"
                        android:layout_centerVertical="true"
                        />
                    <RelativeLayout
                        android:id="@+id/select_loginaccount_rl"
                        android:layout_width="44.45dp"
                        android:layout_height="match_parent"
                        android:layout_alignParentRight="true">
                        <ImageView
                            android:id="@+id/select_loginaccount_image"
                            android:layout_width="16.45dp"
                            android:layout_height="8.89dp"
                            android:layout_alignParentRight="true"
                            android:layout_marginRight="16.89dp"
                            android:layout_centerVertical="true"
                            android:src="@drawable/account_list"/>
                    </RelativeLayout>
                    <ImageView
                        android:id="@+id/account_login_detete"
                        android:layout_width="23.56dp"
                        android:layout_height="23.11dp"
                        android:layout_marginRight="4.45dp"
                        android:visibility="gone"
                        android:layout_centerVertical="true"
                        android:src="@drawable/delete_image"
                        android:layout_toLeftOf="@id/select_loginaccount_rl"
                        />
                    <EditText
                        android:id="@+id/login_account_ed"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_alignParentBottom="true"
                        android:layout_marginLeft="10dp"
                        android:layout_marginBottom="0dp"
                        android:layout_toLeftOf="@id/account_login_detete"
                        android:layout_toRightOf="@id/user_icon_image"
                        android:background="@null"
                        android:editable="true"
                        android:gravity="center_vertical"
                        android:hint="@string/account_input_tips"
                        android:imeOptions="actionNext"
                        android:textColor="@color/activityTitle"
                        android:textColorHint="@color/activityText"
                        android:textSize="20dp" />
                </RelativeLayout>
                <!--  android:layout_marginTop="12.45dp"-->
                <TextView
                    android:id="@+id/login_account_textview"
                    android:layout_width="300dp"
                    android:layout_height="1.78dp"
                    android:background="@color/activityTextLine"
                    />
                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="59.48dp"
                    >


                    <ImageView
                        android:layout_width="23.11dp"
                        android:layout_height="23.56dp"
                        android:src="@drawable/account_password"
                        android:id="@+id/user_password_image"
                        android:layout_centerVertical="true"
                        />
                    <ImageView
                        android:id="@+id/look_psw_image"
                        android:layout_width="33.33dp"
                        android:layout_height="18.22dp"
                        android:layout_alignParentRight="true"
                        android:layout_marginRight="7.56dp"
                        android:layout_centerVertical="true"
                        android:src="@drawable/account_list_eye"
                        />
                    <ImageView
                        android:id="@+id/account_loginpsw_detete"
                        android:layout_width="23.56dp"
                        android:layout_height="23.11dp"
                        android:layout_marginRight="8dp"
                        android:visibility="gone"
                        android:layout_centerVertical="true"
                        android:src="@drawable/delete_image"
                        android:layout_toLeftOf="@id/look_psw_image"
                        />
                    <EditText
                        android:id="@+id/account_login_psw"
                        android:layout_width="182.22dp"
                        android:layout_height="match_parent"
                        android:layout_centerVertical="true"
                        android:hint="@string/password_input_tips"
                        android:textColorHint="@color/activityText"
                        android:layout_marginLeft="35.56dp"
                        android:background="@null"
                        android:gravity="center_vertical"
                        android:imeOptions="actionNext"
                        android:textColor="@color/activityTitle"
                        android:textSize="20dp"
                        android:password="true"
                        />
                </RelativeLayout>
                <TextView
                    android:layout_width="300dp"
                    android:layout_height="1.78dp"
                    android:background="@color/activityTextLine"
                    />

            </LinearLayout>

        </RelativeLayout>


        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="24.45dp"
            android:layout_marginTop="22.22dp"
            >


            <RelativeLayout
                android:id="@+id/automaticlogin_rl"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">


                <ImageView
                    android:id="@+id/automaticlogin_image"
                    android:layout_width="15.11dp"
                    android:layout_height="15.11dp"
                    android:layout_gravity="center"
                    android:src="@drawable/accept_useragreement_true"
                    android:layout_centerVertical="true"
                    android:layout_marginLeft="33.78dp"
                    />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_toRightOf="@id/automaticlogin_image"
                    android:layout_centerVertical="true"
                    android:text="自动登录"
                    android:textSize="18.67dp"
                    android:layout_marginLeft="8.89dp"
                    />
            </RelativeLayout>
            <LinearLayout
                android:id="@+id/forget_password_rl"
                android:layout_width="100.45dp"
                android:layout_height="24.45dp"
                android:orientation="vertical"
                android:layout_marginRight="22.22dp"
                android:layout_alignParentRight="true">

                <TextView
                    android:id="@+id/forget_password_text"
                    android:layout_width="match_parent"
                    android:layout_height="22.22dp"
                    android:textColor="@color/activityYelloButton"
                    android:text="@string/forget_password"
                    android:layout_gravity="center"
                    android:textSize="18.67dp"
                    />


            </LinearLayout>
        </RelativeLayout>
        <RelativeLayout
            android:layout_marginTop="12.45dp"
            android:layout_width="match_parent"
            android:layout_height="53.33dp">
            <Button
                android:id="@+id/promptly_login"
                android:layout_width="310.67dp"
                android:layout_height="56.89dp"
                android:textSize="24dp"
                android:layout_marginLeft="6.22dp"
                android:layout_centerInParent="true"
                android:textColor="@color/activityButtonTextColor"
                android:background="@drawable/blue_button_style"
                android:text="@string/now_login"/>
        </RelativeLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="26.67dp"
            android:layout_marginTop="22.22dp"
            android:orientation="horizontal"
            android:visibility="gone"
            >
            <RelativeLayout
                android:id="@+id/mobile_phone_rl"
                android:layout_width="0px"
                android:layout_height="match_parent"
                android:layout_weight="1"
                >
                <TextView
                    android:id="@+id/mobile_phone_text"
                    android:layout_width="84.44dp"
                    android:layout_height="match_parent"
                    android:textSize="20.44dp"
                    android:layout_alignParentLeft="true"
                    android:textColor="@color/activityTitle"
                    android:layout_marginLeft="33.33dp"
                    android:text="@string/message_register"/>
            </RelativeLayout>
            <RelativeLayout
                android:id="@+id/register_rl"
                android:layout_width="0px"
                android:layout_height="match_parent"
                android:layout_weight="1"
                >
                <TextView
                    android:id="@+id/register_textview"
                    android:layout_width="84.44dp"
                    android:layout_height="match_parent"
                    android:textSize="20.44dp"
                    android:textColor="@color/activityTitle"
                    android:layout_alignParentRight="true"
                    android:layout_marginRight="33.33dp"
                    android:text="手机注册"
                    />
            </RelativeLayout>
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

    布局预览

    image.png

    我们要实现的功能就是要把登录后的数据缓存到一个list 列表里面 然后能够滑动 删除 还可以长按移动每一个子元素 。

    • 1 缓存数据 并用list列表展示出来

    首先缓存逻辑我们要用到 SharedPreferences 来缓存数据 当然你用sqlite 也可以 我后面会补一个这样的版本

    自定义PopupWindow
    package com.example.accountrecord;
import java.util.List;
import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.PopupWindow;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.example.accountrecord.recycler.MessageitemtochCallback;
import com.example.accountrecord.recycler.Myadapter;
import com.example.accountrecord.recycler.OnItemClickCallback;
import com.example.accountrecord.recycler.StartdragCallback;


/**
 * 自定义PopupWindow  主要用来显示ListView
 *
 * @param
 * @param
 * @author Ansen
 * @create time 2015-11-3
 */
public class SpinerPopWindow extends PopupWindow {
    private static final String TAG = "SpinerPopWindow";
    private LayoutInflater inflater;
    private List<SelectPhone> list;
    private Context context;
    private RemoveUserinfoListner removeUserinfoListner;  //删除item 数据响应回调
    private RecyclerView recyclerView;
    private Myadapter myadapter;
    ItemTouchHelper itemTouchHelper;  
    private OnItemClickCallback onItemClickCallback;   //item 点击回调


    public SpinerPopWindow(Context context, List<SelectPhone> list,
                           OnItemClickCallback onItemClickCallback, RemoveUserinfoListner removeUserinfoListner) {
        super(context);
        inflater = LayoutInflater.from(context);
        this.list = list;
        this.context = context;
        this.removeUserinfoListner = removeUserinfoListner;
        this.onItemClickCallback=onItemClickCallback;
        init();
    }
    private void init() {
        View view = inflater.inflate(ResourceUtil.getLayoutId(context, "select_phonedialog"), null);
        setContentView(view);
        setFocusable(true);
        setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
        setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
        ColorDrawable dw = new ColorDrawable(0x00);
        setBackgroundDrawable(dw);
        recyclerView=view.findViewById(R.id.select_listview);
        recyclerView.setLayoutManager(new LinearLayoutManager(context));
        myadapter=new Myadapter(list, context,removeUserinfoListner,onItemClickCallback,new StartdragCallback() {
            @Override
            public void startdrag(RecyclerView.ViewHolder viewHolder) {
                itemTouchHelper.startDrag(viewHolder);
            }
        });
        recyclerView.setAdapter(myadapter);
        ItemTouchHelper.Callback callback=new MessageitemtochCallback(myadapter);
        itemTouchHelper=new ItemTouchHelper(callback);
        itemTouchHelper.attachToRecyclerView(recyclerView);
        if (list != null) {
            recyclerView.setAdapter(myadapter);
        }
    }
}

    自定义popupwindow 布局文件

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >

    <RelativeLayout
        android:layout_width="300dp"
        android:layout_height="200dp"
        android:background="@color/activityTextWhite"
        android:layout_centerHorizontal="true"
        >
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/select_listview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
        </androidx.recyclerview.widget.RecyclerView>
    </RelativeLayout>
</RelativeLayout>
    image.png

    我们这边的想法比较明确就是 我们在点击登录输入框右边图片三角形 我们讲popupwindow 弹出来 然后展示一个列表 显示出我们缓存在本地的账号 信息 那么我们这边用 RecyclerView 来显示这个列表.但是如果我们要处理拖住item 滑动item 等到操作 我们就需要实现 ItemTouchHelper .callback 这个接口

    package com.example.accountrecord.recycler;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.RecyclerView;


public class MessageitemtochCallback extends ItemTouchHelper.Callback {
    private  ItemTouchAdapterCallback itemTouchAdapterCallback;
    public MessageitemtochCallback(ItemTouchAdapterCallback itemTouchAdapterCallback) {
        this.itemTouchAdapterCallback = itemTouchAdapterCallback;
    }


    /**
     * @param recyclerView
     * @param viewHolder
     * @return
     * 判断是否需要监听哪个动作 侧滑 拖拽
     */
    @Override
    public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
       int  dragFlags=ItemTouchHelper.UP|ItemTouchHelper.DOWN;
       int  swipeFlags=ItemTouchHelper.LEFT|ItemTouchHelper.RIGHT;
        return makeMovementFlags(dragFlags,swipeFlags);
    }

    /**
     * @param recyclerView
     * @return
     * 拖拽的时候回调这个方法
     *
     */

    @Override
    public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder srcholder,
                          @NonNull RecyclerView.ViewHolder targethodler) {

        /**
         * 刷新数据
         * 刷新界面(刷新adapter)
         *
         */
       itemTouchAdapterCallback.onitemmove(srcholder.getAdapterPosition(),targethodler.getAdapterPosition());
        return false;
    }
    @Override
    public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int position) {
     itemTouchAdapterCallback.onitemSwiped(viewHolder.getAdapterPosition());
    }
    @Override
    public boolean isLongPressDragEnabled() {
        return true;
    }
}

    我们在 getMovementFlags 这个回调方法里面设置 需要监听那个动作 侧滑 拖拽 然后在 onMove 方法里面处理刷新数据的操作

        /**
     * @param recyclerView
     * @return
     * 拖拽的时候回调这个方法
     *
     */
    @Override
    public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder srcholder,
                          @NonNull RecyclerView.ViewHolder targethodler) {
        /**
         * 刷新数据
         * 刷新界面(刷新adapter)
         *
         */
   itemTouchAdapterCallback.onitemmove(srcholder.getAdapterPosition(),targethodler.getAdapterPosition());
        return false;
    }

    然后是我们的适配器处理

    适配器

    package com.example.accountrecord.recycler;
import android.annotation.SuppressLint;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.example.accountrecord.DeleteaccountDialog;
import com.example.accountrecord.Deleteaccountlistener;
import com.example.accountrecord.R;
import com.example.accountrecord.RemoveUserinfoListner;
import com.example.accountrecord.ResourceUtil;
import com.example.accountrecord.SelectPhone;
import com.example.accountrecord.SharedPreferencesUtils;
import java.util.Collections;
import java.util.List;


public class Myadapter extends RecyclerView.Adapter<Myadapter.MyViewHodler> implements ItemTouchAdapterCallback{
   private List<SelectPhone> data;
   private StartdragCallback satrtdragCallback;
   private Context context;
   private RemoveUserinfoListner removeUserinfoListner;
   private OnItemClickCallback onItemClickListener;


    public Myadapter(List<SelectPhone> data, Context context, RemoveUserinfoListner removeUserinfoListner,
                     OnItemClickCallback onItemClickListener,StartdragCallback satrtdragCallback ) {
        this.data = data;
        this.satrtdragCallback = satrtdragCallback;
        this.context=context;
        this.removeUserinfoListner=removeUserinfoListner;
        this.onItemClickListener=onItemClickListener;
    }



    @NonNull
    @Override
    public Myadapter.MyViewHodler onCreateViewHolder(@NonNull ViewGroup parent, int i) {
       View  view=LayoutInflater.from(parent.getContext()).inflate(R.layout.selectphone_item,parent,false);
        return new MyViewHodler(view);
    }

    @Override
    public void onBindViewHolder(@NonNull final Myadapter.MyViewHodler myViewHodler, @SuppressLint("RecyclerView") final int position) {
        final SelectPhone selectPhone = (SelectPhone) data.get(position);
        myViewHodler.phonetextview.setText(selectPhone.getName());
          myViewHodler.account_rl.setOnTouchListener(new View.OnTouchListener() {
             @Override
             public boolean onTouch(View v, MotionEvent event) {
                satrtdragCallback.startdrag(myViewHodler);
                 return false;
             }
         });

        myViewHodler.deleterl.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // data.remove(position);
                DeleteaccountDialog deleteaccountDialog = new DeleteaccountDialog(context, selectPhone.getName(), new Deleteaccountlistener() {
                    @Override
                    public void deleteaccountsuccess() {
                        notifyDataSetChanged();
                        removeUserinfoListner.removeuserinfosuccess(position,
                                (List<SelectPhone>)data);
                    }
                });
                deleteaccountDialog.show();

            }
        });


        myViewHodler.account_rl.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                onItemClickListener.onClick(  myViewHodler.account_rl, position);
            }
        });

    }
    @Override
    public int getItemCount() {
        return data.size();
    }

    public class  MyViewHodler extends RecyclerView.ViewHolder{
        TextView phonetextview;
        ImageView imageview;
        RelativeLayout deleterl;
        RelativeLayout account_rl;

        public MyViewHodler(@NonNull View itemView) {
            super(itemView);
            phonetextview = itemView.findViewById(ResourceUtil.getId(context, "account_textview"));//account_textview   //account_image
            imageview = itemView.findViewById(ResourceUtil.getId(context, "account_image"));
            deleterl = itemView.findViewById(ResourceUtil.getId(context, "delete_account_rl"));
            account_rl=itemView.findViewById(ResourceUtil.getId(context,"account_rl"));
        }
    }

    @Override
    public boolean onitemmove(int fromposition, int toposition) {
          Collections.swap(data ,fromposition,toposition);
          SharedPreferencesUtils.putSelectBean(context,data,"qqmessage");
           notifyItemMoved(fromposition,toposition);
           return false;
    }
    @Override
    public void onitemSwiped(int position) {
        data.remove(position);
        notifyItemRemoved(position);
    }
}

    我们的适配器实现了 ItemTouchAdapterCallback 这个接口然后onitemmove 方法和 onitemSwiped 方法，然后分别 处理侧滑监听和拖拽监听的

     @Override
    public boolean onitemmove(int fromposition, int toposition) {
            Collections.swap(data ,fromposition,toposition);
            SharedPreferencesUtils.putSelectBean(context,data,"qqmessage");
            notifyItemMoved(fromposition,toposition);
            return false;
      }
    @Override
    public void onitemSwiped(int position) {
        data.remove(position);
        notifyItemRemoved(position);
    }

    LoginActivity 实现

    package com.example.accountrecord;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.example.accountrecord.recycler.OnItemClickCallback;
import java.util.ArrayList;
import java.util.List;



public class LoginActivity extends AppCompatActivity implements View.OnClickListener {
    private static final String TAG = "LoginActivity";
    private EditText account_ed ,password_ed;
    private String  account, password;
    private  Boolean flag=false;
    private Button  loginbtn;
    List<SelectPhone> getdata=null;
    private Context mContext=LoginActivity.this;
    private TextView  textView;
    private RelativeLayout select_loginaccount_rl;
    private String  cacheaccount ,cachepsw;
    private SpinerPopWindow mSpinerPopWindow;
    List<SelectPhone> data=new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        initview();

    }

    private void initview() {
        account_ed=findViewById(R.id.login_account_ed);
        password_ed=findViewById(R.id.account_login_psw);
        loginbtn=findViewById(R.id.promptly_login);
        loginbtn.setOnClickListener(this);
        textView=findViewById(R.id.login_account_textview);
        select_loginaccount_rl=findViewById(R.id.select_loginaccount_rl);
        select_loginaccount_rl.setOnClickListener(this);
        getdata = SharedPreferencesUtils.getSelectBean(mContext, "selectphone");
        if (getdata != null && getdata.size() > 0) {
            SelectPhone phone = getdata.get(0);
            cacheaccount = phone.getName();
            cachepsw=phone.getPassword();

            if (!TextUtils.isEmpty(cacheaccount)) {
                account_ed.setText(cacheaccount);
                password_ed.setText(cachepsw);
            } else {
                account_ed.setText(null);
                password_ed.setText(null);
            }
        }

        mSpinerPopWindow = new SpinerPopWindow(LoginActivity.this,
                getdata, onItemClickListener, removeUserinfoListner);
        mSpinerPopWindow.setOnDismissListener(dismissListener);
    }

    //删除用户缓存信息
    private RemoveUserinfoListner removeUserinfoListner = new RemoveUserinfoListner() {
        @Override
        public void removeuserinfosuccess(int position, List<SelectPhone> data) {
            if (data != null && data.size() > 0) {
                data.remove(position);
                SharedPreferencesUtils.putSelectBean(mContext, data, "selectphone");
                flag = false;
                List<SelectPhone> getdata = SharedPreferencesUtils.
                        getSelectBean(LoginActivity.this, "selectphone");
                if (getdata != null && getdata.size() > 0) {
                    SelectPhone selectPhone = getdata.get(0);
                    account_ed.setText(selectPhone.getName());
                    password_ed.setText(selectPhone.getPassword());
                } else {
                    account_ed.setText(null);
                    password_ed.setText(null);

                }
            } else {
                Toast.makeText(mContext,"缓存数据为空",Toast.LENGTH_LONG).show();
            }
        }

    };

    /**
     * 监听popupwindow取消
     */
    private PopupWindow.OnDismissListener dismissListener = new PopupWindow.OnDismissListener() {
        @Override
        public void onDismiss() {
            flag = false;

        }
    };

    /**
     * popupwindow显示的ListView的item点击事件
     */

    private OnItemClickCallback onItemClickListener=new OnItemClickCallback() {
        @Override
        public void onClick(View parent, int position) {
            mSpinerPopWindow.dismiss();
            flag = false;
            SelectPhone selectPhone = getdata.get(position);
            String getusername = selectPhone.getName();
            String psw = selectPhone.getPassword();
            account_ed.setText(getusername);
            password_ed.setText(psw);
        }
    };
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.promptly_login:
                login();
                break;
            case R.id.select_loginaccount_rl:
                if (flag) {
                    flag = false;
                    if (mSpinerPopWindow != null) {
                        mSpinerPopWindow.dismiss();
                    } else {

                    }
                } else {
                    flag = true;
                    if (mSpinerPopWindow != null) {
                        mSpinerPopWindow.showAsDropDown(textView);
                    } else {
                    }

                }
                break;
          default:
              break;
        }
    }

    private  void  login(){
        account=account_ed.getText().toString();
        password=password_ed.getText().toString();
        if(TextUtils.isEmpty(account)||TextUtils.isEmpty(password)){
            Toast.makeText(mContext,"账号或者密码输入不能为空",Toast.LENGTH_LONG).show();
        }
        SelectPhone selectPhone=new SelectPhone();
        selectPhone.setName(account);
        selectPhone.setPassword(password);
        List<SelectPhone> getdata = SharedPreferencesUtils.getSelectBean(LoginActivity.this, "selectphone");
        if (getdata != null && getdata.size() > 0) {
            getdata.add(0,selectPhone);
            SharedPreferencesUtils.putSelectBean(LoginActivity.this, getdata, "selectphone");
        } else {
            data.add(selectPhone);
            SharedPreferencesUtils.putSelectBean(LoginActivity.this, data, "selectphone");
        }
        Toast.makeText(mContext,"登录成功数据缓存成功",Toast.LENGTH_LONG).show();
        finish();

    }
}

    我们在 LoginActivity 界面的逻辑就比较简单了 我们只需要缓存数据以及在点击登录button的时候 缓存数据到本地即可.

    最后总结：

    这个demo 主要是对recyclerview 里面的 ItemTouchHelper.Callback 类里面拖拽方法和侧滑时间方法的处理 ,然后配合recyclerview 来实现这样的一个本地数据缓存的列表的效果 。 最后希望我都文章能帮助各位同学工作和学习 。如果觉得文章还不错希望能给我一个star 和转发

    项目地址：

    码云 https://gitee.com/qiuyu123/item-touch-helperdemo

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