android 实现Listview左右滑动删除Item

以下实现如下功能，当我们在某一项，向左或者向右滑动时候，可以在相应item，显示一个删除按钮，用户点击按钮，即可以删除该项item，并且有一个简单动画。

具体代码如下：

package com.hck.listviewdeleteitem;

import java.util.ArrayList;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
private ListView listView; //listview控件
private ArrayList contentStrings = new ArrayList(); //数据源
private ListViewAdpter adapter;  //适配器
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) findViewById(R.id.list);
initData(); //初始化数据
setListener();  //绑定事件
}
private void initData() {
contentStrings.add("第1项");
contentStrings.add("第2项");
contentStrings.add("第3项");
contentStrings.add("第4项");
contentStrings.add("第5项");
contentStrings.add("第6项");
contentStrings.add("第7项");
contentStrings.add("第8项");
contentStrings.add("第9项");
contentStrings.add("第10项");
contentStrings.add("第11项");
contentStrings.add("第12项");
contentStrings.add("第13项");
adapter=new ListViewAdpter(contentStrings, this);
listView.setAdapter(adapter);
}

private void setListener() {

listView.setOnItemClickListener(new OnItemClickListener() { //点击每项item时候执行
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Toast.makeText(MainActivity.this, "点击事件，执行你的操作", Toast.LENGTH_SHORT).show();
}
});

}

}

package com.hck.listviewdeleteitem;

import java.util.ArrayList;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.Animation.AnimationListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.TextView;

public class ListViewAdpter extends BaseAdapter {
public ArrayList data; //数据源
private Context context;
private float downX;  //点下时候获取的x坐标
private float upX;   //手指离开时候的x坐标
private Button button; //用于执行删除的button
private Animation animation;  //删除时候的动画
private View view;
public ListViewAdpter(ArrayList data, Context context) {
this.data = data;
this.context = context;
animation=AnimationUtils.loadAnimation(context, R.anim.push_out);  //用xml获取一个动画
}

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

@Override
public Object getItem(int arg0) {
return data.get(arg0);
}

@Override
public long getItemId(int arg0) {
return arg0;
}

@Override
public View getView(final int position,  View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.item,
null);
holder = new ViewHolder();
holder.textView = (TextView) convertView.findViewById(R.id.text);
holder.button=(Button) convertView.findViewById(R.id.bt);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
convertView.setOnTouchListener(new OnTouchListener() {  //为每个item设置setOnTouchListener事件

@Override
public boolean onTouch(View v, MotionEvent event) {
final ViewHolder holder = (ViewHolder) v.getTag();  //获取滑动时候相应的ViewHolder，以便获取button按钮
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:  //手指按下
downX = event.getX(); //获取手指x坐标
if (button != null) {
button.setVisibility(View.GONE);  //影藏显示出来的button
}
break;
case MotionEvent.ACTION_UP:  //手指离开
upX = event.getX(); //获取x坐标值
break;
}

if (holder.button != null) {
if (Math.abs(downX - upX) > 35) {  //2次坐标的绝对值如果大于35，就认为是左右滑动
holder.button.setVisibility(View.VISIBLE);  //显示删除button
button = holder.button;  //赋值给全局button，一会儿用
view=v; //得到itemview，在上面加动画
return true; //终止事件
}
return false;  //释放事件，使onitemClick可以执行
}
return false;
}

});

holder.button.setOnClickListener(new OnClickListener() {  //为button绑定事件

@Override
public void onClick(View v) {

if (button != null) {
button.setVisibility(View.GONE);  //点击删除按钮后，影藏按钮
deleteItem(view, position);   //删除数据，加动画
}

}
});
holder.textView.setText(data.get(position));  //显示数据
return convertView;
}
public void deleteItem(View view,final int position)
{
view.startAnimation(animation);  //给view设置动画
animation.setAnimationListener(new AnimationListener() {

@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}

@Override
public void onAnimationEnd(Animation animation) { //动画执行完毕
data.remove(position);  //把数据源里面相应数据删除
notifyDataSetChanged();

}
});

}
static class ViewHolder {
TextView textView;  //显示数据的view
Button button;  //删除按钮
}

}