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Android实现可拖动排序的ListView实例代码

分类:移动开发 来源:网络收集 发布:学长源码 时间:2017-11-27

Android实现可拖动排序的ListView实例代码。分享给大家供大家参考,具体如下:

一、上图

二、简述

1、需要实现的效果是长按右侧可拖动部分布局实现列表项的拖动排序
2、当点击列表项前面的单选按钮时,在该条目右侧显示删除图标,点击该图标删除当前条目。

三、实现思路

借助github上的开源代码drag-sort-listview-master加以改造。

四、主要源码展示

1、Activity代码

package com.gengducun.dslvdemo;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import com.mobeta.android.dslv.DragSortListView;
public class MainActivity extends Activity {
 protected static final String TAG = "MainActivity";
 /**产品信息列表**/
 private ArrayList<ProductInfoBean> productInfoList;
 /**产品列表控件**/
 private DragSortListView mDslvProductList;
 /**产品信息列表*/
 private ProductListAdapter mProductListAdapter;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  mDslvProductList = (DragSortListView) findViewById(R.id.dslv_product_list);
  initProductList();
  mProductListAdapter = new ProductListAdapter(productInfoList, this);
  mDslvProductList.setAdapter(mProductListAdapter);
  mDslvProductList.setDropListener(onDrop);
  mDslvProductList.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
 }
 private DragSortListView.DropListener onDrop = new DragSortListView.DropListener() {
  @Override
  public void drop(int from, int to) {
   if (from != to) {
    ProductInfoBean item = (ProductInfoBean) mProductListAdapter.getItem(from);
    mProductListAdapter.remove(item);
    mProductListAdapter.insert(item,from, to);
    mDslvProductList.moveCheckState(from, to);
   }
  }
 };
 private void initProductList() {
  productInfoList = new ArrayList<ProductInfoBean>();
  ProductInfoBean productInfo1 = new ProductInfoBean("EURUSD1");
  ProductInfoBean productInfo2 = new ProductInfoBean("EURUSD2");
  ProductInfoBean productInfo3 = new ProductInfoBean("EURUSD3");
  ProductInfoBean productInfo4 = new ProductInfoBean("EURUSD4");
  ProductInfoBean productInfo5 = new ProductInfoBean("EURUSD5");
  ProductInfoBean productInfo6 = new ProductInfoBean("EURUSD6");
  ProductInfoBean productInfo7 = new ProductInfoBean("EURUSD7");
  productInfoList.add(productInfo1);
  productInfoList.add(productInfo2);
  productInfoList.add(productInfo3);
  productInfoList.add(productInfo4);
  productInfoList.add(productInfo5);
  productInfoList.add(productInfo6);
  productInfoList.add(productInfo7);
 }
}

2、Adapter代码

package com.gengducun.dslvdemo;
import java.util.ArrayList;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.TextView;
public class ProductListAdapter extends BaseAdapter {
 private static final String TAG = "ProductListAdapter1";
 /**产品信息列表*/
 private ArrayList<ProductInfoBean> productInfoList;
 /**上下文*/
 private Context mContext;
 /**布局加载器*/
 private LayoutInflater mInflater;
 /**布局缓存*/
 private ViewHolder mHolder;
 /**本类适配器对象**/
 private ProductListAdapter mProductListAdapter1;
 /**选中项位置**/
 private int mSelectPosition = -1;
 public ProductListAdapter(ArrayList<ProductInfoBean> productInfoList, Context context) {
  super();
  this.productInfoList = productInfoList;
  this.mContext = context;
  this.mInflater = LayoutInflater.from(context);
  this.mProductListAdapter1 = this;
 }
 @Override
 public int getCount() {
  return null == productInfoList ? 0 : productInfoList.size();
 }
 @Override
 public Object getItem(int position) {
  return productInfoList.get(position);
 }
 @Override
 public long getItemId(int position) {
  return position;
 }
 public int getmSelectPosition() {
  return mSelectPosition;
 }
 public void setmSelectPosition(int mSelectPosition) {
  this.mSelectPosition = mSelectPosition;
 }
 /**
  * 删除产品
  * @param productInfoBean
  */
 public void remove(ProductInfoBean productInfoBean) {
  synchronized (this) {
   productInfoList.remove(productInfoBean);
  }
  notifyDataSetChanged();
 }
 /**
  * 将产品移动到指定的位置
  * @param productInfoBean
  * @param from 移动之前的位置
  * @param to 移动完成之后,该产品所在的位置
  */
 public void insert(ProductInfoBean productInfoBean, int from, int to) {
  synchronized (this) {
   Log.i(TAG, "from=" + from + "  to =" + to);
   if (mSelectPosition != -1) {//有选中项的前提下
    if ((from < mSelectPosition && to < mSelectPosition) || (from > mSelectPosition && to > mSelectPosition)) {
     //在选中项之前的位置进行拖拉或者在选中项之后的区域拖拉,不会影响选中项
    } else if (from < mSelectPosition && to > mSelectPosition) {
     //将选中项之前的移动到选中项之后的位置,则选中项的索引需要发生变化,应该是选中项的位置-1
     mSelectPosition = mSelectPosition - 1;
    } else if (from > mSelectPosition && to < mSelectPosition) {
     //将选中项之后的项移动到选中项之前的位置,索引也需要变化,应该是选中项的位置+1
     mSelectPosition = mSelectPosition + 1;
    } else if ((from == mSelectPosition && from > to) || (from == mSelectPosition && from < to)) {
     //如果将选中项往选中项前面的方向拖,则选中项的索引也需要变化,应该是拖动到的位置
     mSelectPosition = to;
    } else if ((from < mSelectPosition && to == mSelectPosition)) {
     //将选中项之前的移动到当前选中项的位置,索引需要变化,选中项的索引应该是 选中项的值-1
     mSelectPosition = mSelectPosition - 1;
    } else if (from > mSelectPosition && to == mSelectPosition) {
     //将选中项之后的移动到当前项的位置,索引需要变化,选中项的索引应该是选中项的值+1
     mSelectPosition = mSelectPosition + 1;
    }
   }
   productInfoList.add(to, productInfoBean);
  }
  notifyDataSetChanged();
 }
 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  if (null == convertView) {
   convertView = mInflater.inflate(R.layout.list_item_product_list_1, null);
   mHolder = new ViewHolder();
   mHolder.rbSelect = (RadioButton) convertView.findViewById(R.id.rb_select);
   mHolder.tvPurductName = (TextView) convertView.findViewById(R.id.tv_product_name);
   mHolder.llDragLayout = (LinearLayout) convertView.findViewById(R.id.drag_handle);
   mHolder.ivDrag = (ImageView) convertView.findViewById(R.id.iv_drag);
   mHolder.ivDeleteProduct = (ImageView) convertView.findViewById(R.id.iv_product_delete);
   convertView.setTag(mHolder);
  } else {
   mHolder = (ViewHolder) convertView.getTag();
  }
  ProductInfoBean productInfoBean = productInfoList.get(position);
  if (null != productInfoBean) {
   //设置单选按钮的选中状态
   if (mSelectPosition == position) {
    mHolder.rbSelect.setChecked(true);
    mHolder.ivDrag.setVisibility(View.GONE);
    mHolder.ivDeleteProduct.setVisibility(View.VISIBLE);
    mHolder.ivDeleteProduct.setOnClickListener(new RemoveItemClickListener(mSelectPosition));
   } else {
    mHolder.rbSelect.setChecked(false);
    mHolder.ivDrag.setVisibility(View.VISIBLE);
    mHolder.ivDeleteProduct.setVisibility(View.GONE);
   }
   mHolder.rbSelect.setOnClickListener(new ProductClickListener(position));
   //设置产品名称
   if (null != productInfoBean.getProductName() && !("".equals(productInfoBean.getProductName()))) {
    mHolder.tvPurductName.setText(productInfoBean.getProductName());
   }
  }
  return convertView;
 }
 class ViewHolder {
  RadioButton rbSelect;
  TextView tvPurductName;
  LinearLayout llDragLayout;
  ImageView ivDrag;
  ImageView ivDeleteProduct;
 }
 /**
  * 单选按钮事件监听
  * @author Wilson
  */
 class ProductClickListener implements OnClickListener {
  private int position;
  public ProductClickListener(int position) {
   super();
   this.position = position;
  }
  @Override
  public void onClick(View v) {
   if (mSelectPosition == position) {
    mSelectPosition = -1;
   } else {
    mSelectPosition = position;
   }
   Log.i(TAG, "mSelectPosition=" + mSelectPosition + " position=" + position);
   mProductListAdapter1.notifyDataSetChanged();
  }
 }
 /**
  * 删除当前产品项监听事件
  */
 class RemoveItemClickListener implements OnClickListener {
  private int position;
  public RemoveItemClickListener(int position) {
   super();
   this.position = position;
  }
  @Override
  public void onClick(View v) {
   //1、删除集合中的数据
   productInfoList.remove(position);
   //2、删除服务器端的数据
   mProductListAdapter1.notifyDataSetChanged();
   //
   mSelectPosition = -1;
  }
 }
}

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