Android在ListView异步线程获取网络图片

zqchn 2013-04-12 09:43:11

根据目前服务器的设置，我需要先发一些信息，去获取图片的名称。然后再发信息到服务器，获取各个图片，我目前所有图片只会在最后一行循环刷新。。。这几天也试了很多方法，一直不成功。求指教了。



public class FileListAdapter extends BaseAdapter {

        private Context context; // 运行上下文

        private List<Files> groupList = new ArrayList<Files>(); // 所有文件及文件夹

        // private List<List<String>> childList = new

        // ArrayList<List<String>>();//文件集合

        private LayoutInflater listContainer; // 视图容器

        private Files files;

        private boolean isOk;

        private boolean isFirst = true;

        private Handler handler;

        private ImageView imgfile;

        private ListItemView listItemView;

 

        public final class ListItemView { // 自定义控件集合

                public Button downButton, friendButton, shareButton, renameButton;

                public Button deleteButton;

                private Button select_img;

                public ImageView img_isView;

                public TextView fileName, fileDate;

        }

 

        public FileListAdapter(Context context, List<Files> groups) {

                this.context = context;

                this.groupList = groups;

                listContainer = LayoutInflater.from(context);

                listItemView = new ListItemView();

                handler = new Handler() {

 

                        @Override

                        public void handleMessage(Message msg) {

                                // TODO Auto-generated method stub

                                switch (msg.what) {

 

                                case 2:

                                        notifyDataSetChanged();

                                        break;

 

                                default:

                                        break;

                                }

                                super.handleMessage(msg);

                        }

 

                };

 

        }

 

        @Override

        public int getCount() {

                // TODO Auto-generated method stub

                return groupList.size();

        }

 

        @Override

        public Object getItem(int position) {

                // TODO Auto-generated method stub

                return groupList.get(position);

        }

 

        @Override

        public long getItemId(int position) {

                // TODO Auto-generated method stub

                return position;

        }

 

        @Override

        public View getView(int position, View convertView, ViewGroup parent) {

                // TODO Auto-generated method stub

 

                if (convertView == null) {

                        convertView = listContainer.inflate(R.layout.item_filelist, null);

                }

                imgfile = (ImageView) convertView.findViewById(R.id.img_fileimg);

                // 初始化绑定控件

                listItemView.deleteButton = (Button) convertView

                                .findViewById(R.id.btn_delete);

                listItemView.downButton = (Button) convertView

                                .findViewById(R.id.btn_download);

                listItemView.friendButton = (Button) convertView

                                .findViewById(R.id.btn_friend);

                listItemView.renameButton = (Button) convertView

                                .findViewById(R.id.btn_rename);

                listItemView.shareButton = (Button) convertView

                                .findViewById(R.id.btn_share);

                listItemView.fileName = (TextView) convertView

                                .findViewById(R.id.txt_fileName);

                listItemView.fileDate = (TextView) convertView

                                .findViewById(R.id.txt_fileDate);

                listItemView.select_img = (Button) convertView

                                .findViewById(R.id.btn_select);

 

                listItemView.img_isView = (ImageView) convertView

                                .findViewById(R.id.img_checkimg);

 

                // 进行初始化赋值

                initData(convertView, position);

                setListener(convertView, position, parent);

 

                return convertView;

        }

 

        private void setListener(final View convertView, final int position,

                        final ViewGroup parent) {

                // TODO Auto-generated method stub

                final Files Cur_file = groupList.get(position);

                final String Cur_fileName = groupList.get(position).getFileName();

               

 

        }

 

        private void initData(View convertView, final int position) {

                // TODO Auto-generated method stub

                Files files = new Files();

                files = groupList.get(position);

                listItemView.fileName.setText(files.getFileName());

 

                // 判断是文件

                if (files.isFile()) {

                        String fileType = files.getFileName().substring(

                                        files.getFileName().lastIndexOf("."),

                                        files.getFileName().length());

                        listItemView.fileDate.setText(files.getLastModified() + " "

                                        + files.getLength());

                        listItemView.downButton.setText("下载");

                        listItemView.downButton.setTag("下载");

                        if (fileType.equals(".jpg") || fileType.equals(".png")

                                        || fileType.equals(".gif") || fileType.equals(".Jpeg")

                                        || fileType.equals(".bmp")) {

//我现在就是要在这里，如果是图片。我就要去服务器获取文件名，文件名的获取是通过

//HttpCookieUtils httpCookieUtils = new HttpCookieUtils(); 

//httpCookieUtils.preview( groupList.get(position).getPath(),

// "40", "40"); 

//这个返回的是一个字符串，就是文件名。然后再设置缩略图，但是一直不成功，只会在最后一行循环刷新图片。而且线程一直在跑

//下面注释的都是我之前写的代码

 

                                /*

                                 * new Thread() {

                                 * 

                                 * @Override public void run() { // TODO Auto-generated method

                                 * stub HttpCookieUtils httpCookieUtils = new HttpCookieUtils();

                                 * String msg = null; Bitmap bitmap = null; try { msg =

                                 * httpCookieUtils.preview( groupList.get(position).getPath(),

                                 * "40", "40"); bitmap = BitmapUtils

                                 * .getHttpBitmap(Constants.API_HOST + Constants.API_SHOW +

                                 * msg); } catch (NotLoginException e) { // TODO Auto-generated

                                 * catch block e.printStackTrace(); } catch (IOException e) { //

                                 * TODO Auto-generated catch block e.printStackTrace(); }

                                 * Message m = handler.obtainMessage(1, 1, 1, bitmap);

                                 * handler.sendMessage(m); super.run(); }

                                 * 

                                 * 

                                 * }.start();

                                 */

 

                        }

 

                } else {

                        listItemView.fileDate.setText(files.getLastModified());

                        listItemView.downButton.setText("打开");

                        listItemView.downButton.setTag("打开");

                        groupList.get(position).setFileImg("file");

                        imgfile.setBackgroundResource(R.drawable.img_filelist);

                }

        }