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RecycleView基本使用

2020年07月23日  | 移动技术网移动技术  | 我要评论

1.布局文件.xml

  <android.support.v7.widget.RecyclerView
            android:id="@+id/regionInfoRecycler"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:visibility="visible"
            android:layout_weight="8"/>

2.子布局文件.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:orientation="vertical">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="48dp"
    android:orientation="horizontal"
   >
    <TextView
        android:id="@+id/orderNum"
        android:layout_width="0dp"
        android:layout_height="48dp"
        android:layout_weight="1"
        android:layout_marginLeft="10dp"
        android:gravity="center"
        android:text="1"></TextView>
    <TextView
        android:id="@+id/regionName"
        android:layout_width="0dp"
        android:layout_height="48dp"
        android:layout_weight="3"
        android:layout_marginLeft="20dp"
        android:gravity="center_vertical"
        android:text="高新供电中心"></TextView>

</LinearLayout>
    <View
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="@color/colorLine" />

</LinearLayout>

3.适配器 Adapter

package rcd.rfidmobile.adapter;

import android.graphics.Region;
import android.support.annotation.Nullable;
import android.widget.TextView;

import com.chad.library.adapter.base.BaseItemDraggableAdapter;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;

import java.util.List;

import rcd.rfidmobile.R;
import rcd.rfidmobile.entity.RegionDTO;

public class RegionAdapter extends BaseItemDraggableAdapter<RegionDTO, BaseViewHolder> {

    public RegionAdapter(@Nullable List<RegionDTO> data){
        super(R.layout.region_item,data);
    }

    @Override
    protected void convert(BaseViewHolder helper, RegionDTO item) {
        TextView  orderNumTV = helper.getView(R.id.orderNum);
        orderNumTV.setText((helper.getAdapterPosition()+1)+"");
        TextView  regionNameTV = helper.getView(R.id.regionName);
        regionNameTV.setText(item.getRegionname());
    }
}

4.Activity

   recyclerView = findViewById(R.id.regionInfoRecycler);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(linearLayoutManager);
        regionAdapter = new RegionAdapter(regionDTOList);

//滑动删除
 ItemDragAndSwipeCallback itemDragAndSwipeCallback = new ItemDragAndSwipeCallback(regionAdapter);
        ItemTouchHelper itemTouchHelper = new ItemTouchHelper(itemDragAndSwipeCallback);
        itemTouchHelper.attachToRecyclerView(recyclerView);

        // 开启拖拽
        regionAdapter.enableDragItem(itemTouchHelper, R.id.textView, true);
        regionAdapter.setOnItemDragListener(new OnItemDragListener() {
            @Override
            public void onItemDragStart(RecyclerView.ViewHolder viewHolder, int pos) {
                //  Toast.makeText(RegionCollectionActivity.this,"onItemDragStart",Toast.LENGTH_SHORT).show();
                Log.i(TAG, "onItemDragStart");
            }

            @Override
            public void onItemDragMoving(RecyclerView.ViewHolder source, int from, RecyclerView.ViewHolder target, int to) {
                // Toast.makeText(RegionCollectionActivity.this,"onItemDragMoving",Toast.LENGTH_SHORT).show();
                Log.i(TAG, "onItemDragMoving");
            }

            @Override
            public void onItemDragEnd(RecyclerView.ViewHolder viewHolder, int pos) {
                // Toast.makeText(RegionCollectionActivity.this,"onItemDragEnd",Toast.LENGTH_SHORT).show();
                Log.i(TAG, "onItemDragEnd");
            }
        });

        //开启滑动删除
        regionAdapter.enableSwipeItem();
        regionAdapter.setOnItemSwipeListener(new OnItemSwipeListener() {
            @Override
            public void onItemSwipeStart(RecyclerView.ViewHolder viewHolder, int pos) {
                //Toast.makeText(RegionCollectionActivity.this,"onItemSwipeStart",Toast.LENGTH_SHORT).show();
                Log.i(TAG, "onItemSwipeStart");
            }

            @Override
            public void clearView(RecyclerView.ViewHolder viewHolder, int pos) {
                // Toast.makeText(RegionCollectionActivity.this,"clearView",Toast.LENGTH_SHORT).show();
                Log.i(TAG, "clearView");
            }

            @Override
            public void onItemSwiped(RecyclerView.ViewHolder viewHolder, final int pos) {
                //Toast.makeText(RegionCollectionActivity.this,"onItemSwiped",Toast.LENGTH_SHORT).show();
//                Toast.makeText(RegionInfoActivity.this, "" + regionDTOList.get(pos).getRegionname() + "数据被删除了", Toast.LENGTH_SHORT).show();
                Log.i(TAG, "onItemSwiped");
                new AlertDialog.Builder(context)
                        .setTitle("确认删除" + regionDTOList.get(pos).getRegionname() + "吗？")
                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                deleteRegion(pos);
                            }
                        })
                        .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                dialogInterface.dismiss();
                                initData();
                                regionAdapter.setNewData(regionDTOList);
                            }
                        }).show();

            }

            @Override
            public void onItemSwipeMoving(Canvas canvas, RecyclerView.ViewHolder viewHolder, float dX, float dY, boolean isCurrentlyActive) {
                //Toast.makeText(RegionCollectionActivity.this,"onItemSwipeMoving",Toast.LENGTH_SHORT).show();
                Log.i(TAG, "onItemSwipeMoving");
            }
        });
        recyclerView.setAdapter(regionAdapter);

本文地址：https://blog.csdn.net/qq_39312230/article/details/107480396

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