Android自定义可编辑、删除的侧滑LisitView

最近由于项目的需要，自定义了一个具有侧滑功能的listview，侧滑后可以点击编辑、删除。好了，大家先看一下效果图，毕竟是看脸的世界。 

好了，我要先讲一下思路，一次编辑很难完善，有什么问题我后来还会补上，欢迎各位大神拍砖：
1、首先先说一下item：item用的LinearLayout布局，删除、编辑分别是写死了宽度的TextView，左边是一个match_parent的RelativeLayout,内容自己随意搞 

2、上下滑动和左右滑动的处理：当用户手指滑动时，可以进行坐标的判断，如果Y轴移动距离大，则listview上下滑动；否则当X轴移动距离达到或者超过一个TextView的宽度时，动态控制item的marginLeft为负的两倍TextView的宽度，从而实现滑动效果 

3、编辑、删除的点击：编辑、删除在adapter中进行监听，然后自己在adapter中再定义一个监听接口，方便用户在使用listview的activity中进行监听 

下面附上item的布局文件：

Adapter代码： 

package com.lei.slidelistview;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.baseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;


public class ListViewSlideAdapter extends baseAdapter{

 private List bulbList;
 private Context context;
 private onClickListenerEditOrDelete onClickListenerEditOrDelete;

 public ListViewSlideAdapter(Context context, List bulbList){
  this.bulbList=bulbList;
  this.context=context;
 }

 @Override
 public int getCount() {
  return bulbList.size();
 }

 @Override
 public Object getItem(int position) {
  return bulbList.get(position);
 }

 @Override
 public long getItemId(int position) {
  return position;
 }

 @Override
 public View getView(final int position, View convertView, ViewGroup parent) {
  final String bulb=bulbList.get(position);
  View view;
  ViewHolder viewHolder;
  if(null == convertView) {
  view = View.inflate(context, R.layout.item_slide_delete_edit, null);
  viewHolder=new ViewHolder();
  viewHolder.tvName=(TextView)view.findViewById(R.id.tvName);
  viewHolder.img=(ImageView)view.findViewById(R.id.imgLamp);
  viewHolder.tvDelete=(TextView)view.findViewById(R.id.delete);
  viewHolder.tvEdit=(TextView)view.findViewById(R.id.tvEdit);
  view.setTag(viewHolder);//store up viewHolder
  }else {
  view=convertView;
  viewHolder=(ViewHolder)view.getTag();
  }

  viewHolder.img.setImageResource(R.mipmap.ic_launcher);
  viewHolder.tvName.setText(bulb);
  viewHolder.tvDelete.setonClickListener(new View.onClickListener() {
  @Override
  public void onClick(View v) {
   if (onClickListenerEditOrDelete!=null){
   onClickListenerEditOrDelete.onClickListenerDelete(position);
   }
  }
  });
  viewHolder.tvEdit.setonClickListener(new View.onClickListener() {
  @Override
  public void onClick(View v) {
   if (onClickListenerEditOrDelete!=null){
   onClickListenerEditOrDelete.onClickListenerEdit(position);
   }
  }
  });
  return view;
 }

 private class ViewHolder{
  TextView tvName,tvEdit,tvDelete;
  ImageView img;
 }

 public interface OnClickListenerEditOrDelete{
 void onClickListenerEdit(int position);
 void onClickListenerDelete(int position);
 }

 public void setonClickListenerEditOrDelete(onClickListenerEditOrDelete onClickListenerEditOrDelete1){
 this.onClickListenerEditOrDelete=onClickListenerEditOrDelete1;
 }

 }

自定义ListView文件代码：

package com.lei.slidelistview;

import android.content.Context;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.ListView;

public class SlideListView extends ListView {
 private int mScreenWidth; // 屏幕宽度
 private int mDownX; // 按下点的x值
 private int mDownY; // 按下点的y值
 private int mDeleteBtnWidth;// 删除按钮的宽度
 
 private boolean isDeleteShown; // 删除按钮是否正在显示
 
 private ViewGroup mPointChild; // 当前处理的item
 private LinearLayout.LayoutParams mLayoutParams; // 当前处理的item的LayoutParams
 
 public SlideListView(Context context, AttributeSet attrs) {
 this(context, attrs, 0);
 }

 public SlideListView(Context context, AttributeSet attrs, int defStyle) {
 super(context, attrs, defStyle);
 
 // 获取屏幕宽度
 WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
 DisplayMetrics dm = new DisplayMetrics();
 wm.getDefaultDisplay().getMetrics(dm);
 mScreenWidth = dm.widthPixels;
 }
 
 @Override
 public boolean onTouchEvent(MotionEvent ev) {
 switch (ev.getAction()) {
 case MotionEvent.ACTION_DOWN:
 performActionDown(ev);
 break;
 case MotionEvent.ACTION_MOVE:
 return performActionMove(ev);
 case MotionEvent.ACTION_UP:
 performActionUp();
 break;
 }
 
 return super.onTouchEvent(ev);
 }

 // 处理action_down事件
 private void performActionDown(MotionEvent ev) {
 if(isDeleteShown) {
 turnTonormal();
 }
 
 mDownX = (int) ev.getX();
 mDownY = (int) ev.getY();
 // 获取当前点的item
 mPointChild = (ViewGroup) getChildAt(pointToPosition(mDownX, mDownY)
 - getFirstVisiblePosition());
 // 获取删除按钮的宽度
 mDeleteBtnWidth = mPointChild.getChildAt(1).getLayoutParams().width;
 mLayoutParams = (LinearLayout.LayoutParams) mPointChild.getChildAt(0)
 .getLayoutParams();
 mLayoutParams.width = mScreenWidth;
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 }
 
 // 处理action_move事件
 private boolean performActionMove(MotionEvent ev) {
 int nowX = (int) ev.getX();
 int nowY = (int) ev.getY();
 if(Math.abs(nowX - mDownX) > Math.abs(nowY - mDownY)) {
 // 如果向左滑动
 if(nowX < mDownX) {
 // 计算要偏移的距离
 int scroll = (nowX - mDownX) / 2;
 // 如果大于了删除按钮的宽度， 则最大为删除按钮的宽度
 if(-scroll >= mDeleteBtnWidth) {
 scroll = -mDeleteBtnWidth;
 }
 // 重新设置leftMargin
 mLayoutParams.leftMargin = scroll*2;
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 }
 return true;
 }
 return super.onTouchEvent(ev);
 }
 
 // 处理action_up事件
 private void performActionUp() {
 // 偏移量大于button的一半，则显示button
 // 否则恢复默认
 if(-mLayoutParams.leftMargin >= mDeleteBtnWidth / 2) {
 mLayoutParams.leftMargin = -mDeleteBtnWidth*2;
 isDeleteShown = true;
 }else {
 turnTonormal();
 }
 
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 }
 
 public void turnTonormal() {
 mLayoutParams.leftMargin = 0;
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 isDeleteShown = false;
 }
 
 public boolean canClick() {
 return !isDeleteShown;
 }


}

下面附上使用布局代码+使用后台代码（2016年7月7日亲测可用）
布局： 

使用后台代码，这里要注意以下adapter设置监听的位置，放错了会报错哦 

package com.lei.slidelistview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
 private SlideListView listView;
 private List list=new ArrayList();
 private ListViewSlideAdapter listViewSlideAdapter;

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

 private void initView(){
 listView=(SlideListView)findViewById(R.id.list);
 listViewSlideAdapter=new ListViewSlideAdapter(this,list);
 listView.setAdapter(listViewSlideAdapter);
 listViewSlideAdapter.setonClickListenerEditOrDelete(new ListViewSlideAdapter.onClickListenerEditOrDelete() {
  @Override
  public void onClickListenerEdit(int position) {
  Toast.makeText(MainActivity.this, "edit position: " + position, Toast.LENGTH_SHORT).show();
  }

  @Override
  public void onClickListenerDelete(int position) {
  Toast.makeText(MainActivity.this, "delete position: " + position, Toast.LENGTH_SHORT).show();
  }
 });
 }

 private void getData(){
 for (int i=0;i<20;i++){
  list.add(new String("第"+i+"个item"));
 }
 }
}

更多学习内容，可以点击《Android侧滑效果汇总》学习。

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