Android RecyclerViewSwipeDismiss:水平、垂直方向的拖曳删除item



Android RecyclerViewSwipeDismiss:水平、垂直方向的拖曳删除item

RecyclerViewSwipeDismiss是一种支持RecyclerView的水平、垂直方向拖曳删除RecyclerView里面条目item的第三方开源项目,RecyclerViewSwipeDismiss在gitbub上的项目主页是:https://github.com/CodeFalling/RecyclerViewSwipeDismiss
我在以前写过类似的项目内容,最典型的就是腾讯QQ的消息列表,见附录文章1所简介,QQ的消息列表中某一个条目左滑以后会滑出一系列选项,比如删除、置顶等。同样,也有像附录文章2那样左滑右滑可以删除ListView内容的开源项目。
这篇文章要介绍的RecyclerViewSwipeDismiss,除了支持RecyclerView这个最新的“ListView”外,RecyclerViewSwipeDismiss还支持垂直方向的上滑/下滑,以及水平方向的左滑/右滑删除,这和附录文章1,2的开源项目相比较有其应用场景特色,假设有一个水平方向的RecyclerView,那么我可以设置成垂直方向的滑动删除;假设是一个垂直方向的RecyclerView,那么我可以设置成水平方向的左滑/右滑删除。
写一个简单的例子,测试的MainActivity.java:

package zhangphil.demo;

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import java.util.LinkedList;
import java.util.List;

import io.github.codefalling.recyclerviewswipedismiss.SwipeDismissRecyclerViewTouchListener;

public class MainActivity extends Activity {

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

        final RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);

        LinearLayoutManager horizontalLayoutManager = new LinearLayoutManager(this);
        horizontalLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
        mRecyclerView.setLayoutManager(horizontalLayoutManager);

        List<String> data = new LinkedList<String>();
        for (int i = 0; i < 100; i++)
            data.add("数据:" + i);

        final MyAdapter adapter = new MyAdapter(data);
        mRecyclerView.setAdapter(adapter);

        SwipeDismissRecyclerViewTouchListener listener = new SwipeDismissRecyclerViewTouchListener.Builder(
                mRecyclerView,
                new SwipeDismissRecyclerViewTouchListener.DismissCallbacks() {
                    @Override
                    public boolean canDismiss(int position) {
                        return true;
                    }

                    @Override
                    public void onDismiss(View view) {
                        int id = mRecyclerView.getChildPosition(view);
                        adapter.data.remove(id);
                        adapter.notifyDataSetChanged();
                        Toast.makeText(getApplication(), String.format("删除 %d", id), Toast.LENGTH_SHORT).show();
                    }
                })
                .setIsVertical(true) /**true为垂直方向拖曳删除,如果是false,那么是水平方向的拖曳删除*/
                .create();

        mRecyclerView.setOnTouchListener(listener);
    }

    public class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {

        public List<String> data;

        public MyAdapter(List<String> data) {
            super();
            this.data = data;
        }

        @Override
        public MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
            View view = View.inflate(viewGroup.getContext(), android.R.layout.simple_list_item_1, null);
            MyViewHolder holder = new MyViewHolder(view);
            return holder;
        }

        @Override
        public void onBindViewHolder(MyViewHolder viewHolder, int i) {
            viewHolder.mTextView.setText(data.get(i));
        }

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

    private class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView mTextView;

        public MyViewHolder(View itemView) {
            super(itemView);
            mTextView = (TextView) itemView;
        }
    }
}


布局文件:

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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="vertical" />

</RelativeLayout>


运行结果:


在设计时候要注意一些常识,比如,如果设计的是一个水平的RecyclerView,那么比较自然的滑动删除方向是垂直的上滑/下滑;而如果是一个垂直方向的RecyclerView,那么比较自然的滑动删除方向是水平的左滑/右滑。RecyclerViewSwipeDismiss通过setIsVertical(boolean b)布尔值控制,true为垂直方向的上下滑动删除,false则是水平方向的左右滑动删除,开发者应该设计相配套的RecyclerView方向。



附录文章:
1,《Android SwipeMenuListView》链接地址:http://blog.csdn.net/zhangphil/article/details/46999127
2,《Android SwipeToDismiss:左滑/右滑删除ListView条目Item》链接地址:http://blog.csdn.net/zhangphil/article/details/47081863

posted on 2016-06-06 16:08  疯子123  阅读(262)  评论(0编辑  收藏  举报

导航