需求：当你在复用listView的子项带有checkbox控件的view对象时，由于复用的原理是直接复用前面失去焦点的view对象（不懂得具体可看前面的一篇关于listView优化的记录）

那么checkbox的记录也会被复用，这就会产生数据错乱

处理方法：

步骤：1、给listView添加监听点击事件的方法，在监听到listView的子项被点击时，认为的去记录该子项下checkbox的状态

2、我们将在一个业务bean中保存每个listView子项的状态，在复用的时候，检查并设置相应的状态即可

代码如下

子项的布局文件

listView的布局文件

业务bean代码：

package com.zaizai.safty.domain;import android.graphics.drawable.Drawable;/** * 进程信息业务bean * Created by zaizai on 2015/11/15. */public class TaskInfo {    private Drawable icon;    private String name; //应用程序名字    private String packname; //应用程序包名    private long memorysize;//内存占用大小    private boolean userTask;//true用户进程 false系统进程    private boolean checaked;    public boolean isChecaked() {        return checaked;    }    public void setChecaked(boolean checaked) {        this.checaked = checaked;    }    @Override    public String toString() {        return "TaskInfo{" +                "icon=" + icon +                ", name='" + name + '\'' +                ", packname='" + packname + '\'' +                ", memorysize=" + memorysize +                ", userTask=" + userTask +                ", checaked=" + checaked +                '}';    }    public Drawable getIcon() {        return icon;    }    public void setIcon(Drawable icon) {        this.icon = icon;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getPackname() {        return packname;    }    public void setPackname(String packname) {        this.packname = packname;    }    public long getMemorysize() {        return memorysize;    }    public void setMemorysize(long memorysize) {        this.memorysize = memorysize;    }    public boolean isUserTask() {        return userTask;    }    public void setUserTask(boolean userTask) {        this.userTask = userTask;    }}activity代码

package com.zaizai.safty;import android.graphics.Color;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.text.format.Formatter;import android.util.Log;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.CheckBox;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.RelativeLayout;import android.widget.TextView;import com.zaizai.safty.domain.TaskInfo;import com.zaizai.safty.engine.TaskInfoProvider;import com.zaizai.safty.utils.SystemInfoUtils;import java.util.ArrayList;import java.util.List;/** * Created by zaizai on 2015/11/15. */public class TaskManagerActivity extends AppCompatActivity {    private static final String TAG = "zaizai";    private TextView tvProcessCount;    private TextView tvRemainsMemory;    private LinearLayout llLoading;    private ListView lvTaskManager;    private List
    
      allTaskInfos;    private List
     
       userTaskInfos;    private List
      
        systemTaskInfos;    private TaskManagerAdapter taskManagerAdapter;    private TextView tvTaskPromptInfo;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_task_manager);        tvProcessCount = (TextView) findViewById(R.id.tv_process_count);        tvRemainsMemory = (TextView) findViewById(R.id.tv_remains_memory);        llLoading = (LinearLayout) findViewById(R.id.ll_loading);        lvTaskManager = (ListView) findViewById(R.id.lv_task_manager);        tvTaskPromptInfo = (TextView) findViewById(R.id.tv_task_prompt_info);        int processCount = SystemInfoUtils.getRunningProcessCount(this);        tvProcessCount.setText("运行中的进程有：" + processCount + "个");        long availableRemainsMemory = SystemInfoUtils.getAvailableRemainsMemoryCount(this);        long totalRemainsMemory = SystemInfoUtils.getTotalRemainsMemoryCount(this);        tvRemainsMemory.setText("剩余/总内存:" + Formatter.formatFileSize(this, availableRemainsMemory) + "/" + Formatter.formatFileSize(this, totalRemainsMemory));        /*加载数据到listView*/        fillData();        /*监听listView的点击事件，自己保存checkBox的状态*/        lvTaskManager.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView
        parent, View view, int position, long id) {                Log.i(TAG, "TaskManagerListView被点击");                int userTaskCount = 0;                if (userTaskInfos != null) {                    userTaskCount = userTaskInfos.size();                }                int systemtaskCount = 0;                if (systemTaskInfos != null) {                    systemtaskCount = systemTaskInfos.size();                }                TaskInfo taskInfo = null;                if (position == 0) {                /*用户进程的标签*/                    return;                } else if (position == userTaskCount + 1) {                /*系统进程的标签*/                    return;                } else if (position <= userTaskCount && userTaskInfos != null) {                /*用户进程*/                    int newPosition = position - 1;                    taskInfo = userTaskInfos.get(newPosition);                } else if (position >= userTaskCount + 2 && position <= (userTaskCount + systemtaskCount + 2) && systemTaskInfos != null) {                /*position > userTaskCount + 2 加一因为增加一个系统进程标签*/                    int newPostion = position - userTaskCount - 2;                    taskInfo = systemTaskInfos.get(newPostion);                }                if (view instanceof RelativeLayout) {                    ViewHolder holder = (ViewHolder) view.getTag();                    if (taskInfo != null && taskInfo.isChecaked()) {                        Log.i(TAG, "checkBox被选中");                        taskInfo.setChecaked(false);                        holder.cbTaskStatus.setChecked(false);                    } else {                        Log.i(TAG, "checkBox被选中");                        taskInfo.setChecaked(true);                        holder.cbTaskStatus.setChecked(true);                    }                }            }        });        /*监听滚动事件，改变提示文本控件的信息*/        lvTaskManager.setOnScrollListener(new AbsListView.OnScrollListener() {            @Override            public void onScrollStateChanged(AbsListView view, int scrollState) {            }            @Override            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {                if (userTaskInfos != null && systemTaskInfos != null) {                    if (firstVisibleItem >= userTaskInfos.size()) {                        tvTaskPromptInfo.setText("系统进程：" + systemTaskInfos.size() + "个");                    } else {                        tvTaskPromptInfo.setText("用户进程：" + userTaskInfos.size() + "个");                    }                }            }        });    }    /**     * 填充数据     */    private void fillData() {        llLoading.setVisibility(View.VISIBLE);        new Thread(new Runnable() {            @Override            public void run() {                allTaskInfos = TaskInfoProvider.getTaskInfos(TaskManagerActivity.this);                userTaskInfos = new ArrayList
       
        ();                systemTaskInfos = new ArrayList
        
         ();                /*将allTaskInfos中的infos进行分类*/                for (TaskInfo info : allTaskInfos) {                    if (info.isUserTask()) {                        userTaskInfos.add(info);                    } else {                        systemTaskInfos.add(info);                    }                }                /*更新界面*/                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        llLoading.setVisibility(View.INVISIBLE);                        if (taskManagerAdapter == null) {                            taskManagerAdapter = new TaskManagerAdapter();                            lvTaskManager.setAdapter(taskManagerAdapter);                        } else {                            taskManagerAdapter.notifyDataSetChanged();                        }                    }                });            }        }).start();    }    private class TaskManagerAdapter extends BaseAdapter {        @Override        public int getCount() {            int size = 0;            if (userTaskInfos != null) {                size = size + userTaskInfos.size();            }            if (systemTaskInfos != null) {                size = size + systemTaskInfos.size();            }            size = size + 2;            return size;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            TaskInfo taskInfo = null;            int userTaskCount = 0;            if (userTaskInfos != null) {                userTaskCount = userTaskInfos.size();            }            int systemtaskCount = 0;            if (systemTaskInfos != null) {                systemtaskCount = systemTaskInfos.size();            }            if (position == 0) {                /*用户进程的标签*/                TextView tv = new TextView(getApplicationContext());                tv.setBackgroundColor(Color.GRAY);                tv.setTextColor(Color.WHITE);                tv.setText("用户进程：" + userTaskCount + "个");                return tv;            } else if (position == userTaskCount + 1) {                /*系统进程的标签*/                TextView tv = new TextView(getApplicationContext());                tv.setBackgroundColor(Color.GRAY);                tv.setTextColor(Color.WHITE);                tv.setText("系统进程：" + systemtaskCount + "个");                return tv;            } else if (position <= userTaskCount && userTaskInfos != null) {                /*用户进程*/                int newPosition = position - 1;                taskInfo = userTaskInfos.get(newPosition);            } else if (position >= userTaskCount + 2 && position <= (userTaskCount + systemtaskCount + 2) && systemTaskInfos != null) {                /*position > userTaskCount + 2 加一因为增加一个系统进程标签*/                int newPostion = position - userTaskCount - 2;                taskInfo = systemTaskInfos.get(newPostion);            }            View view;            ViewHolder viewHolder;            if (convertView != null && convertView instanceof RelativeLayout) {                view = convertView;                viewHolder = (ViewHolder) view.getTag();            } else {                view = View.inflate(getApplicationContext(), R.layout.list_item_taskinfo, null);                viewHolder = new ViewHolder();                viewHolder.ivTaskIcon = (ImageView) view.findViewById(R.id.iv_task_icon);                viewHolder.tvTaskName = (TextView) view.findViewById(R.id.tv_task_name);                viewHolder.tvTaskMemorySize = (TextView) view.findViewById(R.id.tv_task_memory_size);                viewHolder.cbTaskStatus = (CheckBox) view.findViewById(R.id.cb_task_status);                view.setTag(viewHolder);            }            if (taskInfo != null) {                viewHolder.ivTaskIcon.setImageDrawable(taskInfo.getIcon());                viewHolder.tvTaskName.setText(taskInfo.getName());                viewHolder.tvTaskMemorySize.setText("内存占用：" + Formatter.formatFileSize(getApplicationContext(), taskInfo.getMemorysize()));                viewHolder.cbTaskStatus.setChecked(taskInfo.isChecaked());            }            return view;        }        @Override        public Object getItem(int position) {            return null;        }        @Override        public long getItemId(int position) {            return 0;        }    }    static class ViewHolder {        ImageView ivTaskIcon;        TextView tvTaskName;        TextView tvTaskMemorySize;        CheckBox cbTaskStatus;    }}数据提供类
        
       
      
     
    

package com.zaizai.safty.engine;import android.app.ActivityManager;import android.content.Context;import android.content.pm.ApplicationInfo;import android.content.pm.PackageManager;import android.graphics.drawable.Drawable;import android.os.Debug;import com.zaizai.safty.R;import com.zaizai.safty.domain.TaskInfo;import java.util.ArrayList;import java.util.List;/** * 提供手机里面的进程信息 * Created by zaizai on 2015/11/15. */public class TaskInfoProvider {    public static List
    
      getTaskInfos(Context context) {        //得到任务管理器        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        /*包管理器，用来获得程序的基本信息*/        PackageManager packageManager = context.getPackageManager();        List
     
       appProcessInfos = activityManager.getRunningAppProcesses();        List
      
        taskInfos = new ArrayList
       
        ();        for (ActivityManager.RunningAppProcessInfo appProcessInfo : appProcessInfos) {            TaskInfo taskInfo = new TaskInfo();            /*appProcessInfo.pid;进程id 没有为0            * appProcessInfo.processName;应用程序包名            * */            String packname = appProcessInfo.processName;            taskInfo.setPackname(packname);            Debug.MemoryInfo[] memoryInfos = activityManager.getProcessMemoryInfo(new int[]{appProcessInfo.pid});            long memorysize = memoryInfos[0].getTotalPrivateDirty() * 1024;            taskInfo.setMemorysize(memorysize);            /*通过包管理器获得程序的基本信息*/            try {                ApplicationInfo applicationInfo = packageManager.getApplicationInfo(packname, 0);                Drawable icon = applicationInfo.loadIcon(packageManager);                taskInfo.setIcon(icon);                String name = applicationInfo.loadLabel(packageManager).toString();                taskInfo.setName(name);                if ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {                    /*用户进程*/                    taskInfo.setUserTask(true);                } else {                    /*系统进程*/                    taskInfo.setUserTask(false);                }            } catch (PackageManager.NameNotFoundException e) {                e.printStackTrace();                taskInfo.setIcon(context.getResources().getDrawable(R.drawable.ic_default));                taskInfo.setName(packname);            }            taskInfos.add(taskInfo);        }        return taskInfos;    }}