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我的代码中的适配器如下,我扩展了基础适配器:

@Override
 public View getView(final int position, View convertView, ViewGroup parent) {
  ViewHolder vHolder;

  // if (convertView == null) {
  vHolder = new ViewHolder();
  convertView = mInflater.inflate(R.layout.home_item, null);
  vHolder.albumIcon = (ImageView) convertView
    .findViewById(R.id.albumIcon);
    try {
   Bitmap icon = aws.getAlbumImg(itemInfolist.get(position)
     .getAlbumInfoCol().get(0).getAlbumID(), 0);
   if (icon != null) {
    vHolder.albumIcon.setImageBitmap(icon);
   } else {
    vHolder.albumIcon.setImageBitmap(BitmapFactory.decodeResource(
      context.getResources(), R.drawable.album));
   }
  } catch (Exception e) {
   vHolder.albumIcon.setImageBitmap(BitmapFactory.decodeResource(
     context.getResources(), R.drawable.album));
  }

      convertView.setTag(vHolder);
  return convertView;
 }

但是,我异步下载了想象,

当调用 Bitmap icon = aws.getAlbumImg(itemInfolist.get(position).getAlbumInfoCol().get(0).getAlbumID(), 0);

一些没有下载的图片会使用默认图片,这些图片下载到另一个Web Service Bean后,我希望Web Service bean发送消息调用这个适配器中的getView方法,以实现自动刷新功能。

但是如果我如下更改Web Service Download Bean,就会导致异常

03-19 07:46:33.241: 错误/AndroidRuntime(716): android.view.ViewRoot$CalledFromWrongThreadException: 只有创建视图层次结构的原始线程才能触摸其视图。

HomeAdapter mHomeAdapter;

 public AlbumWS(HomeAdapter homeAdapter) {
  mHomeAdapter = homeAdapter;
 }

And after download,

public boolean getAlbumImgWS(final ArrayList<Integer> albumIDs) {

  new Thread(new Runnable() {

   @Override
   public void run() {
    // TODO Auto-generated method stub
    AlbumInfoWS aiws = new AlbumInfoWS();
    for (int i = 0; i < albumIDs.size(); ++i) {
     if (ABSCENTALBUMIMGS.contains(albumIDs.get(i))) {
      continue;
     }
     if (FunctionUtil.isExist(albumIDs.get(i))) {
      continue;
     }
     String urlPath = aiws.getAlbumImage("en_US",
       Config.IMG_ATTIBUTETYPE, albumIDs.get(i));
     boolean ret = FunctionUtil.simpleDownload(Config.HOST
       + urlPath, "/data/data/com.greysh.amped/img/"
       + albumIDs.get(i) + ".jpg");
     if (!ret) {
      if (!ABSCENTALBUMIMGS.contains(albumIDs.get(i))) {
       ABSCENTALBUMIMGS.add(albumIDs.get(i));
      }
     }
     mHomeAdapter.notifyDataSetChanged();
    }
   }
  }).start();
  return true;
 }
4

1 回答 1

1
android.view.ViewRoot$CalledFromWrongThreadException:
Only the original thread that created a view hierarchy can touch its views.

此异常意味着您正在尝试从另一个线程更新 UI - 在 Android 中这是不允许的。您应该使用 aHandler将更改发布到主 UI 线程。代替

new Runnable() {
    public void run() {
    ...
    }
};

尝试

mHandler.post(new Runnable() {
                  public void run() {
                  ...
                  }
              };);
于 2010-03-19T10:44:02.360 回答