android ftp多线程多任务下载时的listview滑动列表错乱解决方法

import java.util.ArrayList;import java.util.List;import org.apache.commons.net.ftp.FTPFile;import android.R.bool;import android.annotation.SuppressLint;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.drawable.BitmapDrawable;import android.os.Environment;import android.os.Handler;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.view.ViewGroup.LayoutParams;import android.widget.BaseAdapter;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.ListView;import android.widget.PopupWindow;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.Toast;import com.android.newnotebook.Date;import com.example.listenclass.R;import com.listenclass.common.Constant;import com.listenclass.common.FileInfo;import com.listenclass.common.IRetrieveListener;import com.listenclass.db.DownloadDBManager;import com.listenclass.ftpdown.FTPCfg;import com.listenclass.ftpdown.FTPManager;import com.listenclass.util.Util;import com.llistenclass.service.DownloadService;/** * FTP列表适配器. * * */public class RemoteAdapter extends BaseAdapter {/*** FTP文件列表.*/private List<FTPFile> list = new ArrayList<FTPFile>();private FTPCfg cfg;private static final String LOCAL_PATH = Environment.getExternalStorageDirectory()+"/ftpdownload/";/*** 布局.*/private LayoutInflater inflater;private Context mContext;private ListView mListView;/*** 文件夹显示图片.*/private Bitmap icon1;/*** 文件显示图片.*/private Bitmap icon2;// private boolean mispause = false;/*** 构造函数.* @param context 当前环境* @param li FTP文件列表*/public RemoteAdapter(Context context, List<FTPFile> li,FTPCfg fp,ListView listView) {mContext = context;cfg = fp;this.list = li;this.inflater = LayoutInflater.from(context);mListView = listView;// 文件夹显示图片//icon1 = BitmapFactory.decodeResource(context.getResources(), R.drawable.folder);//// 文件显示图片//icon2 = BitmapFactory.decodeResource(context.getResources(), R.drawable.doc);}@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int position) {return list.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View view, ViewGroup parent) {ViewHolder holder= null;if (view == null){// 设置视图view = this.inflater.inflate(R.layout.item_file_download, null);// 获取控件实例holder = new ViewHolder();// holder.icon = (ImageView) view.findViewById(R.id.image_icon);holder.tvdownloadstate = (TextView) view.findViewById(R.id.txt_download_state);holder.fileName = (TextView) view.findViewById(R.id.txt_download_filename);holder.fileSize = (TextView) view.findViewById(R.id.txt_download_filesize);holder.beginpause = (ImageButton) view.findViewById(R.id.imgbtn_filedownload_opreation);holder.mProgressBar = (ProgressBar) view.findViewById(R.id.proBar_download_peogress);// 设置标签view.setTag(holder);}else{// 获取标签holder = (ViewHolder) view.getTag();}// 获取文件名holder.fileName.setText(list.get(position).getName());holder.tvdownloadstate.setText("");//文件分为四种状态，在列表显示数据时分别判断再处理if (Constant.filestates.get(list.get(position).getName()).getState() == Constant.FILE_DOWNPAUSE){long completesize = Constant.filestates.get(list.get(position).getName()).getCompleteSize();long totalsize = Constant.filestates.get(list.get(position).getName()).getFileSize();String downloadpro = Util.getFormatSize(completesize) + "/"+Util.getFormatSize(totalsize);holder.setPosition(position);holder.beginpause.setBackgroundResource(R.drawable.file_download_start);holder.fileSize.setText(downloadpro);holder.mProgressBar.setProgress(Constant.filestates.get(list.get(position).getName()).getProgress());}else if(Constant.filestates.get(list.get(position).getName()).getState() == Constant.FILE_DOWNLOADING){holder.beginpause.setBackgroundResource(R.drawable.file_download_pause);holder.downloadingInit(position);}else if (Constant.filestates.get(list.get(position).getName()).getState() == Constant.FILE_DOWNOVER){holder.reInit(position,false);long totalsize = Constant.filestates.get(list.get(position).getName()).getFileSize();holder.fileSize.setText("");holder.tvdownloadstate.setText("已完成"+Util.getFormatSize(totalsize));holder.beginpause.setBackgroundResource(R.drawable.file_download_complete);holder.mProgressBar.setProgress(Constant.filestates.get(list.get(position).getName()).getProgress());}else if (Constant.filestates.get(list.get(position).getName()).getState() == Constant.FILE_NOT_DOWNLOAD){System.out.println("—position " +position +"——–name——–"+list.get(position).getName());System.out.println("———state——-"+Constant.filestates.get(list.get(position).getName()).getState());holder.fileSize.setText(Util.getFormatSize(list.get(position).getSize()));//holder.beginpause.setOnClickListener();holder.reInit(position,false);holder.beginpause.setBackgroundResource(R.drawable.file_download_start);holder.mProgressBar.setProgress(0);}System.out.println("——————>getview position "+position+" ——>firstvisibleposition "+mListView.getFirstVisiblePosition() + "—> filename "+list.get(mListView.getFirstVisiblePosition()).getName());return view;}@SuppressLint("NewApi")private void showToolsMenu(PopupWindow mPopupWindow,View locateview) {View view = LayoutInflater.from(mContext).inflate(R.layout.popup_menu_selector, null);float x = locateview.getX();float y = locateview.getY();System.out.println(" x :"+x +" y: "+y);//if (mPopupWindow == null) {////}mPopupWindow = new PopupWindow(view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, true);//view.findViewById(R.id.tools_select).setOnClickListener(this);//view.findViewById(R.id.tools_notebook).setOnClickListener(this);//view.findViewById(R.id.tools_download).setOnClickListener(this);//view.findViewById(R.id.tools_record).setOnClickListener(this);mPopupWindow.setFocusable(true);mPopupWindow.setOutsideTouchable(true);mPopupWindow.setBackgroundDrawable(new BitmapDrawable());//mPopupWindow.setAnimationStyle(R.style.PopupAnimation);view.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);//mPopupWindow.showAtLocation(locateview, Gravity.LEFT, 0, 0);mPopupWindow.showAsDropDown(locateview);}/*** 获取控件.*/private class ViewHolder {//private int mpositon;private ImageView icon;private TextView fileName;private TextView fileSize;private TextView tvdownloadstate;private ImageButton beginpause;private ProgressBar mProgressBar;private int position;private long totalsize = 0;private long mnowOffset = -1;private String strfilesize ;private PopupWindow mPopupWindow;private boolean isstophander = false;//暂停状态的文件调用public void setPosition(int position){this.position = position;totalsize = list.get(position).getSize();strfilesize = Util.getFormatSize(totalsize);isstophander = false;beginpause.setOnClickListener(new btnClickListener());}//下载中的列表item解除复用时调用public void downloadingInit(int position){this.position = position;isstophander = false;totalsize = list.get(position).getSize();strfilesize = Util.getFormatSize(totalsize);mHandler.sendEmptyMessage(2);}//未下载和下载完成的列表复用其他holder时调用public void reInit(int position,boolean isstophander){this.position = position;this.isstophander = isstophander;totalsize = list.get(position).getSize();strfilesize = Util.getFormatSize(totalsize);mHandler.removeMessages(2);beginpause.setOnClickListener(new btnClickListener());}public class btnClickListener implements OnClickListener{@Overridepublic void onClick(View v) {// TODO Auto-generated method stubif (Constant.filestates.get(list.get(position).getName()).getState() != Constant.FILE_DOWNOVER){download();}else{showToolsMenu(mPopupWindow, v);}}}private void download(){//如果当前文件状态不是正在下载，则开始下载if (Constant.filestates.get(list.get(position).getName()).getState() != Constant.FILE_DOWNLOADING){Log.i("FILE_DOWNLOADING", "——-startdownload——-> FILE_DOWNLOADING filename "+list.get(position).getName());beginpause.setBackgroundResource(R.drawable.file_download_pause);Constant.filestates.get(list.get(position).getName()).setState(Constant.FILE_DOWNLOADING);String remotefilename = Util.convertString(list.get(position).getName(), "GBK");Intent intent = new Intent();intent.setClass(mContext, DownloadService.class);intent.putExtra("remotefilename", remotefilename);intent.putExtra("localfilename", list.get(position).getName());intent.putExtra("flag", "startDownload");mContext.startService(intent);mHandler.sendEmptyMessageDelayed(2, 200);}else{Log.i("FILE_DOWNPAUSE", "——-pausedownload——-> FILE_DOWNPAUSE filename "+list.get(position).getName());mHandler.removeMessages(2);Constant.filestates.get(list.get(position).getName()).setState(Constant.FILE_DOWNPAUSE);String remotefilename = Util.convertString(list.get(position).getName(), "GBK");//发送到服务器的文件名需要转码，，否则中文文件无法下载Intent intent = new Intent();intent.setClass(mContext, DownloadService.class);intent.putExtra("remotefilename", remotefilename);intent.putExtra("localfilename", list.get(position).getName());intent.putExtra("flag", "changeState");mContext.startService(intent);beginpause.setBackgroundResource(R.drawable.file_download_start);}}private Handler mHandler = new Handler(){public void handleMessage(android.os.Message msg) {switch (msg.what) {case 2:mnowOffset = Constant.filestates.get(list.get(position).getName()).getCompleteSize();if ((mnowOffset != -1) && mnowOffset != totalsize){// Log.i("—-", "——-position "+position +" isstophander "+isstophander);if (!isstophander){int progress = (int)((mnowOffset /(double) totalsize)*100);// Log.i("progress", "progress :" +progress +" mnowOffset: "+mnowOffset +"totalsize " +totalsize);mProgressBar.setProgress(progress);String downloadpro = Util.getFormatSize(mnowOffset) + "/"+strfilesize;fileSize.setText(downloadpro);sendEmptyMessageDelayed(2, 200);}}else{//如果复用粘合在一起的时候可能会有问题DownloadDBManager dbManager = new DownloadDBManager(mContext);FileInfo fileInfo = new FileInfo();fileInfo.setCoursename("英语");fileInfo.setFilelength(totalsize);fileInfo.setFilename(list.get(position).getName());fileInfo.setDate(new Date().getDate());dbManager.add(fileInfo);mProgressBar.setProgress(100);beginpause.setBackgroundResource(R.drawable.file_download_complete);tvdownloadstate.setText(strfilesize + " 已完成");fileSize.setText("");Toast.makeText(mContext, "下载成功,文件保存路径： " +LOCAL_PATH+list.get(position).getName() , Toast.LENGTH_SHORT).show();}break;default:break;}};};}}

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