Android(安卓)recycleview实现左右切换时的条目滑动效果，条目是固定的，不让滑动，在代码里面有个滑动开关，自己设置即可，需求再花里胡哨，也总是有解决的办法

首先导入Recycleview依赖包

    implementation 'com.android.support:recyclerview-v7:24.2.1'

这个点击左边当前条目就会从左到右滚动至前一条数据，（右边就是从右边滚到左边），需要的就赶紧来，记得关注

my_activity.xml

<?xml version="1.0" encoding="utf-8"?>

item_home.xml

<?xml version="1.0" encoding="utf-8"?>

HomeAdapter.class

package android_robot.com.example.luping.testadapter;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import java.util.ArrayList;import android_robot.com.example.luping.R;/** * Created by Administrator on 2019/11/1. */public class HomeAdapter extends RecyclerView.Adapter {    private Context context;    private ArrayList list;    public HomeAdapter(Context context, ArrayList list) {        this.context=context;        this.list=list;    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        MyViewHolder holder = new MyViewHolder(LayoutInflater.from(                context).inflate(R.layout.item_home, parent,                false));        return holder;    }    @Override    public void onBindViewHolder(MyViewHolder holder, int position) {        holder.tv.setText(list.get(position));    }    @Override    public int getItemCount() {        return list.size();    }    //  添加数据    public void addData(int position) {        // 只有加上这句话，点击的时候才会让条目动起来        notifyItemChanged(position);    }    //  删除数据    public void removeData(int position) {        //   同上，刷新当前条目数据        notifyItemChanged(position);    }    /**     * ViewHolder的类，用于缓存控件     */    class MyViewHolder extends RecyclerView.ViewHolder {        TextView tv;        public MyViewHolder(View view) {            super(view);            tv = (TextView) view.findViewById(R.id.time);        }    }}

禁止条目滑动的工具类

CustomLinearLayoutManager

import android.content.Context;import android.support.v7.widget.LinearLayoutManager;/** * Created by Administrator on 2019/11/1. */public class CustomLinearLayoutManager extends LinearLayoutManager {    private boolean isScrollEnabled = true;    public CustomLinearLayoutManager(Context context) {        super(context);    }    public void setScrollEnabled(boolean flag) {        this.isScrollEnabled = flag;    }    /**     * 禁止滑动     * canScrollHorizontally（禁止横向滑动）     * @return     */    @Override    public boolean canScrollHorizontally() {        return isScrollEnabled && super.canScrollVertically();    }    /**     * 禁止滑动     * canScrollVertically（禁止竖向滑动）     * @return     */    @Override    public boolean canScrollVertically() {        return isScrollEnabled && super.canScrollVertically();    }}

MyActivity

import android.app.Activity;import android.os.Bundle;import android.support.v7.widget.DefaultItemAnimator;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.Log;import android.view.View;import android.widget.ImageView;import java.util.ArrayList;import android_robot.com.example.luping.R;import android_robot.com.example.luping.adapter.CustomLinearLayoutManager;import android_robot.com.example.luping.utils.ToastUtil;public class MyActivity extends Activity {    private RecyclerView mRecyclerView;    HomeAdapter honmeAdapter = null;    private ArrayList datas;    private ImageView mImg_right;    private ImageView mImg_left;    private View mView_right, mView_left;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.my_activity);        mImg_right = findViewById(R.id.mImg_right);        mImg_left = findViewById(R.id.mImg_left);        mView_left = findViewById(R.id.mView_left);        mView_right = findViewById(R.id.mView_right);        mView_left.setVisibility(View.GONE);        mImg_left.setVisibility(View.GONE);//      初始化RecyclerView        mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);        //禁止滑动        CustomLinearLayoutManager customLinearLayoutManager=new CustomLinearLayoutManager(this);        customLinearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);        //滑动开关        customLinearLayoutManager.setScrollEnabled(false);        mRecyclerView.setLayoutManager(customLinearLayoutManager);//      获取数据，向适配器传数据，绑定适配器        datas = initData();        honmeAdapter = new HomeAdapter(MyActivity.this, datas);        mRecyclerView.setAdapter(honmeAdapter);//      添加动画        mRecyclerView.setItemAnimator(new DefaultItemAnimator());        myOnClick();    }    private int index = 0;//控制跳转页的标识    private void myOnClick() {        mImg_right.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (index < datas.size() - 1) {                    index++;                    Log.d("aaaa", "indext++=" + index);                    honmeAdapter.addData(index);                    mRecyclerView.scrollToPosition(index);                    mView_left.setVisibility(View.VISIBLE);                    mImg_left.setVisibility(View.VISIBLE);                } else {                    ToastUtil.show(MyActivity.this, "已经到底了");                }                if (index + 1 == datas.size()) {                    mView_right.setVisibility(View.GONE);                    mImg_right.setVisibility(View.GONE);                }            }        });        mImg_left.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (index > 0) {                    index--;                    Log.d("aaaa", "indext--=" + index);                    honmeAdapter.removeData(index);                    mRecyclerView.scrollToPosition(index);                    mView_right.setVisibility(View.VISIBLE);                    mImg_right.setVisibility(View.VISIBLE);                } else {                    ToastUtil.show(MyActivity.this, "已经到底了");                }                if (index == 0) {                    mView_left.setVisibility(View.GONE);                    mImg_left.setVisibility(View.GONE);                }            }        });    }    /**     * 编写一套假数据     */    protected ArrayList initData() {        ArrayList mDatas = new ArrayList();        for (int i = 0; i < 20; i++) {            mDatas.add("我是条目" + i);        }        return mDatas;    }}

更多相关文章

随机推荐