我想学习android sqlite,所以我创建了一个即时标记应用程序,用户可以在其中标记他的照片并将其上传到他的网络(google +,fb,twitter)问题是我有一个ListFragment
其中用户可以看到他所做的所有标记,列表中的图像元素存储在一个隐藏的文件夹和单词存储在一个sqlite数据库..问题是滚动向上或向下一些项目只是随机切换,即使我有更多比8个项目多8个第一项显示重复(即1-8而不是9-12我再次看到1-4) 唯一的问题可能是在适配器,但在调试会话的会话后,我无法找到问题我的适配器代码是 -listfragment中的奇怪错误
public class FlowAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, List<String>>> data;
private static LayoutInflater layoutInflater = null;
public FlowAdapter(Activity activityContext,
ArrayList<HashMap<String, List<String>>> data) {
this.activity = activityContext;
this.data = data;
this.layoutInflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return data.get(position);
}
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// method variables
ViewHolder cacheView;
HashMap<String, List<String>> photos = null;
photos = data.get(position);
ImageView iv;
FlowLayout flow;
ArrayList<String> subjects = new ArrayList<String>();
if (convertView == null) {
cacheView = new ViewHolder();
convertView = layoutInflater.inflate(R.layout.list_item, null);
flow = (FlowLayout) convertView.findViewById(R.id.flow_tags);;
// add the tags to the flowlayout
int size = photos.get(DatabaseHandler.KEY_TAGS).size();
for (int i = 0; i < size; i++) {
String name = String.format("#%s",
photos.get(DatabaseHandler.KEY_TAGS).get(i));
Bubble.getBubble(name, flow, subjects, activity, photos
.get(DatabaseHandler.KEY_THUMBNAILPATH).get(1), false);
}
cacheView.image = (ImageView)convertView.findViewById(R.id.list_image);//iv;
cacheView.tags = flow;
convertView.setTag(cacheView);
}
cacheView = (ViewHolder) convertView.getTag();
cacheView.image.setImageBitmap(null);
DecodeTask task = new DecodeTask(cacheView.image);
task.execute(photos.get(DatabaseHandler.KEY_THUMBNAILPATH).get(1));
cacheView.image.setTag(R.id.list_image, task);
return convertView;
}
static class ViewHolder {
static FlowLayout tags;
static ImageView image;
public static FlowLayout getFlowLayout() {
return tags;
}
}
}
的流布局是从这里开始 - http://nishantvnair.wordpress.com/2010/09/28/flowlayout-in-android/ 泡沫布局就是从这里开始 - http://nishantvnair.wordpress.com/2010/09/28/android-create-bubble-like-facebook/ 我用这个SO线程至后台加载图像 - Large ListView containing images in Android 任何帮助吗? = \ p.s 我知道已经有这样的应用程序[但实际上,但最好的学习来编写代码,因此我做了=]]
如何放置此行** cacheView =(ViewHolder)convertView.getTag(); **在else条件内?不知道它是否会有帮助,但你可以试试看? –
仍然没有效果...我怀疑它有某种方式连接到flowlayout或bubbleview,因为它们是动态的(换句话说,没有id附加到泡泡布局我只是将它们添加到运行时的flowlayout看看他们在我添加的链接上的实施) – crazyPixel