Android 实现用户列表信息的功能，然后选择删除幻灯片删除功能
在项目开发过程中。经常须要对用户列表的信息进行删除的操作。Android中经常使用的删除操作方式有两种 。一种就是类似微信的滑动出现删除button方式，另一种是通过CheckBox进行选择。然后通过button进行删除的方式。本来的实例集成上述的两种操作方式来实现用户列表删除的效果。
设计思路：在适配器类MyAdapter一个滑动删除button显示或隐藏的Map,一个用于CheckBox是否选中的Map和一个与MainAcitivyt进行数据交互的接口ContentsDeleteListener，同一时候该接口包括两个方法，contentsDeleteSelect(int position, boolean isChecked)方法用于将选中或取消内容从选中List中增加或删除，contentDelete(int position)用于删除List中指定位置的列项。
滑动的效果主要是通过当滑动的距离大于40时。显示滑动删除button，再运行删除操作时，将其它全部设置不可见。并设置CheckBox为不选中状态。
一.代码实现效果
二.代码实现
1. 主界面布局 activity_main.xml
<span style="font-size:18px;"><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"
>
<Button
android:id="@+id/my_delete_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="@string/delete"
/>
<ListView
android:id="@+id/my_lv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_above="@id/my_delete_btn"
android:contentDescription="@string/member_list"/>
</RelativeLayout>
</span>主界面布局非常easy。就一个删除Button和一个存放用户信息的ListView
2.用户项布局 activity_main_list_view.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/my_rl"
android:layout_width="match_parent"
android:layout_height="200dp" >
<CheckBox
android:id="@+id/my_select_cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:background="@drawable/my_list_checkbox_selector"
android:button="@null" />
<TextView
android:id="@+id/my_content_tv"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_centerInParent="true"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@id/my_select_cb"
android:gravity="center"
android:text="@string/delete" />
<TextView
android:id="@+id/my_delete_tv"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_marginLeft="5dp"
android:clickable="true"
android:drawableLeft="@drawable/del_icon_normal"
android:gravity="center"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:text="@string/delete"
android:visibility="gone" />
</RelativeLayout></span>该布局包括一个选择的CheckBox，显示内容的TextView 和一个能滑动实现删除的TextView
3.滑动效果anim_right_left.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="200"
android:fromXDelta="320"
android:fromYDelta="0"
android:toXDelta="0"
android:toYDelta="0" />
</set></span>4.CheckBox选择器 my_list_checekbox_selector.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/my_list_check_box_bg_check" android:state_checked="true"></item>
<item android:drawable="@drawable/my_list_check_box_bg_check" android:state_selected="true"></item>
<item android:drawable="@drawable/my_list_check_box_bg_check" android:state_pressed="true"></item>
<item android:drawable="@drawable/my_list__check_box_bg"></item>
</selector>
</span>5.用户列表适配器 MyAdapter.java
<span style="font-size:18px;">package com.example.slideandselectdeletedemo;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.annotation.SuppressLint;
import android.content.Context;
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.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.example.slidedeleteandselectdemo.R;
@SuppressLint("UseSparseArrays")
public class MyAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private List<String> mContentsList;
private Context mContext;
private ContentsDeleteListener mContentsDeleteListener;
//设置滑动删除button是否显示
private Map<Integer, Integer> visibleDeleteTv;
//CheckBox选择和未选择
private Map<Integer, Boolean> selectCb;
//滑动后的X坐标点
private int mLastX = 0;
// private int mLastY = 0;
public MyAdapter(Context mContext, List<String> mContentsList,
ContentsDeleteListener mContentsDeleteListener) {
this.mContext = mContext;
this.mContentsList = mContentsList;
this.mContentsDeleteListener = mContentsDeleteListener;
this.mInflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
visibleDeleteTv = new HashMap<Integer, Integer>();
selectCb = new HashMap<Integer, Boolean>();
// 更新界面时,记录为 未选中和滑动删除button不可见
for (int i = 0; i < mContentsList.size(); i++) {
visibleDeleteTv.put(i, View.GONE);
selectCb.put(i, false);
}
}
public void updateView(List<String> mContentsList) {
this.mContentsList = mContentsList;
this.notifyDataSetChanged();
}
@Override
public int getCount() {
return mContentsList.size();
}
@Override
public Object getItem(int position) {
return mContentsList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final HolderView holderView;
if (convertView == null) {
holderView = new HolderView();
convertView = mInflater.inflate(R.layout.activity_main_list_view,
null);
holderView.listSelectCb = (CheckBox) convertView
.findViewById(R.id.my_select_cb);
holderView.listContentTv = (TextView) convertView
.findViewById(R.id.my_content_tv);
holderView.listDeleteTv = (TextView) convertView
.findViewById(R.id.my_delete_tv);
holderView.listRl = (RelativeLayout) convertView
.findViewById(R.id.my_rl);
convertView.setTag(holderView);
} else {
holderView = (HolderView) convertView.getTag();
if (holderView.listSelectCb.isChecked()) {
holderView.listSelectCb.setChecked(false);
}
}
// 显示内容
holderView.listContentTv.setText(mContentsList.get(position));
if (visibleDeleteTv != null) {
holderView.listDeleteTv
.setVisibility(visibleDeleteTv.get(position));
}
if (selectCb != null) {
holderView.listSelectCb.setChecked(selectCb.get(position));
mContentsDeleteListener.contentsDeleteSelect(position,
selectCb.get(position));
}
// 处理选择事件
holderView.listRl.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (visibleDeleteTv.containsValue(View.VISIBLE)) {//可见时，再次单击设置不可见。未选中
for (int i = 0; i < getCount(); i++) {
visibleDeleteTv.put(i, View.GONE);
selectCb.put(i, false);
mContentsDeleteListener.contentsDeleteSelect(i, false);
}
notifyDataSetChanged();
} else {
boolean isChecked = holderView.listSelectCb.isChecked() ? false
: true;
holderView.listSelectCb.setChecked(isChecked);
mContentsDeleteListener.contentsDeleteSelect(position, isChecked);
}
}
});
holderView.listSelectCb
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mContentsDeleteListener.contentsDeleteSelect(position,
isChecked);
}
});
holderView.listSelectCb.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (visibleDeleteTv.containsValue(View.VISIBLE)) {
for (int i = 0; i < getCount(); i++) {
visibleDeleteTv.put(i, View.GONE);
selectCb.put(i, false);
mContentsDeleteListener.contentsDeleteSelect(i,
false);
}
notifyDataSetChanged();
}
}
});
convertView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
final Animation alpha = AnimationUtils.loadAnimation(mContext,
R.anim.anim_right_left);
int x = (int) event.getX();
// int y = (int) event.getY();
// Log.d(TAG, "x=" + x + " y=" + y);
// press down
if (event.getAction() == MotionEvent.ACTION_DOWN) {
alpha.cancel();
} else if (event.getAction() == MotionEvent.ACTION_MOVE) {
alpha.cancel();
int deltaX = mLastX - x;
// int deltaY = mLastY - y;
// Log.d(TAG, "deltaX=" + deltaX + ",deltaY=" + deltaY);
if (deltaX > 40) {//当滑动距离大于40时，显示该位置的删除按键
for (int i = 0; i < getCount(); i++) {
visibleDeleteTv.put(i, View.GONE);
selectCb.put(i, false);
mContentsDeleteListener.contentsDeleteSelect(i, false);
if (i == position) {
visibleDeleteTv.put(position, View.VISIBLE);
selectCb.put(i, true);
mContentsDeleteListener.contentsDeleteSelect(i, true);
if (visibleDeleteTv.get(position) == View.VISIBLE) {
holderView.listDeleteTv
.startAnimation(alpha);
}
}
}
notifyDataSetChanged();
}
return true;
} else {// other
alpha.cancel();
}
mLastX = x;
// mLastY = y;
return false;
}
});
holderView.listDeleteTv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Log.d(TAG, "onClick:position=" + position);
mContentsList.remove(position);
mContentsDeleteListener.contentDelete(position);
for (int i = 0; i < mContentsList.size(); i++) {
visibleDeleteTv.put(i, View.GONE);
selectCb.put(i, false);
mContentsDeleteListener.contentsDeleteSelect(i, false);
}
notifyDataSetChanged();
}
});
return convertView;
}
public class HolderView {
public TextView listContentTv, listDeleteTv;
public CheckBox listSelectCb;
public RelativeLayout listRl;
}
public void setContentsDeleteListener(
ContentsDeleteListener mContentsDeleteListener) {
this.mContentsDeleteListener = mContentsDeleteListener;
}
/**
* 用于删除内容的接口
*
* @author liangming.deng
*
*/
public interface ContentsDeleteListener {
/**
* 依据isChecked 选择和取消选择的指定位置
* @param position
* @param isChecked
*/
public void contentsDeleteSelect(int position, boolean isChecked);
/**
* 删除指定位置内容
* @param position
*/
public void contentDelete(int position);
}
public void setVisibleDeleteTv(Map<Integer, Integer> visibleDeleteTv) {
this.visibleDeleteTv = visibleDeleteTv;
}
public void setSelectCb(Map<Integer, Boolean> selectCb) {
this.selectCb = selectCb;
}
}
</span>
5.主界面代码MainActivity.java
<span style="font-size:18px;">package com.example.slideandselectdeletedemo;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import com.example.slideandselectdeletedemo.MyAdapter.ContentsDeleteListener;
import com.example.slidedeleteandselectdemo.R;
public class MainActivity extends Activity implements ContentsDeleteListener,OnClickListener{
private ListView myLv;
private Button myDeleteBtn;
private MyAdapter myAdapter;
private String[] myContentsArray;
private List<String> myContentsList = new ArrayList<String>();
private List<String> mySelectedList = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findById();
myContentsArray = this.getResources().getStringArray(R.array.my_contents);
if(myContentsArray != null){
Collections.addAll(myContentsList, myContentsArray);
}
myAdapter = new MyAdapter(this,myContentsList,this);
myLv.setAdapter(myAdapter);
}
private void findById(){
myLv = (ListView) this.findViewById(R.id.my_lv);
myDeleteBtn = (Button) this.findViewById(R.id.my_delete_btn);
myDeleteBtn.setOnClickListener(this);
}
@Override
public void onResume(){
super.onResume();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/*
* 依据isChecked,给选择的List中加入或删除数据
* (non-Javadoc)
* @see com.example.slideandselectdeletedemo.MyAdapter.ContentsDeleteListener#contentsDeleteSelect(int, boolean)
*/
@Override
public void contentsDeleteSelect(int position,boolean isChecked) {
if(isChecked){
mySelectedList.add(myContentsList.get(position));
}else{
mySelectedList.remove(myContentsList.get(position));
}
}
/*
* 删除指定位置的数据
* (non-Javadoc)
* @see com.example.slideandselectdeletedemo.MyAdapter.ContentsDeleteListener#contentDelete(int)
*/
@Override
public void contentDelete(int position) {
// TODO Auto-generated method stub
myContentsList.remove(position);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.my_delete_btn:
myContentsList.removeAll(mySelectedList);
myAdapter.updateView(myContentsList);
break;
}
}
}
</span>分析：当中mySelectedList主要用于存储CheckBox选中的列表信息。方便删除button进行选中的所有删除。
上述主要部分给出了凝视。
源代码地址：http://download.csdn.net/detail/a123demi/7751141
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