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我已经做了一个自定义列表视图的BaseAdapter.Now的帮助下，我有一个条件来检查，并根据该条件我必须隐藏取消隐藏列表中的按钮。在开始时它工作正常但当我滚动列表中的按钮不在其预期的地方。我知道这是由于列表的refressing，但请你能建议我如何克服它，因为我是新的android。滚动列表给出意想不到的结果
代码
public class RecentDocumentAdapter extends BaseAdapter {
FragmentManager fragmentManager;
Activity activity;
DbHandler dbHandler;
DbModel dbModel;
private Context context;
private AlertDialog.Builder builder;
private String[] shareArray;
private Dialog dialog;
private FragmentTransaction fragmentTransaction;
private ArrayList<DbModel> alGetRecentFiles;
private Bundle bundle;
public RecentDocumentAdapter(Context context, Activity activity, ArrayList<DbModel> alGetRecentFiles) {
this.context = context;
this.activity = activity;
this.alGetRecentFiles = alGetRecentFiles;
bundle = new Bundle();
}
@Override
public int getCount() {
return alGetRecentFiles.size();
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(final int i, View view, ViewGroup viewGroup) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = LayoutInflater.from(context).inflate(R.layout.recent_docs_custom_list, viewGroup, false);
holder.docsImage = (ImageView) view.findViewById(R.id.iv_recent_docs_image);
holder.tvTitle = (TextView) view.findViewById(R.id.tv_recent_name);
holder.tvPostedOn = (TextView) view.findViewById(R.id.tv_recent_posted_on);
holder.btShare = (Button) view.findViewById(R.id.bt_recent_share);
holder.btFav = (Button) view.findViewById(R.id.bt_recent_fav);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
if (alGetRecentFiles.get(i).getCheckType() == 2) {
holder.btShare.setVisibility(View.GONE);
}
holder.tvTitle.setText(alGetRecentFiles.get(i).getTitle() + alGetRecentFiles.get(i).getFileExtension());
holder.tvPostedOn.setText(alGetRecentFiles.get(i).getPostedOn());
if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".jpg") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".jpeg") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".png") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".gif") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".tiff")) {
holder.docsImage.setImageResource(R.drawable.image);
} else if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".doc") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".docx")) {
holder.docsImage.setImageResource(R.drawable.docx);
} else if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".xls") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".xlsx")) {
holder.docsImage.setImageResource(R.drawable.excel);
} else if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".ppt") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".pptx")) {
holder.docsImage.setImageResource(R.drawable.ppt);
} else if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".pdf")) {
holder.docsImage.setImageResource(R.drawable.pdf);
} else if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase(".txt")) {
holder.docsImage.setImageResource(R.drawable.txt);
} else if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("3gp") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("mp4") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("mkv") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("wmv") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("flv") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("avi") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("mpeg") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("mov") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("divx") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("div")) {
holder.docsImage.setImageResource(R.drawable.video);
} else if (alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("mp3") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("wma") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("aac") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("wav") || alGetRecentFiles.get(i).getFileExtension().equalsIgnoreCase("m4a")) {
holder.docsImage.setImageResource(R.drawable.audio);
} else {
holder.docsImage.setImageResource(R.drawable.help);
}
if (alGetRecentFiles.get(i).getFavourites().equals("1")) {
holder.btFav.setVisibility(View.VISIBLE);
} else {
holder.btFav.setVisibility(View.GONE);
}
holder.btShare.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
bundle.putString("docId", alGetRecentFiles.get(i).getDocId());
bundle.putString("title", alGetRecentFiles.get(i).getTitle());
bundle.putString("path", alGetRecentFiles.get(i).getFilePath());
bundle.putString("ext", alGetRecentFiles.get(i).getFileExtension());
bundle.putString("fileName", alGetRecentFiles.get(i).getFileName());
bundle.putInt("hasPassword", alGetRecentFiles.get(i).getHasPassword());
bundle.putString("password", alGetRecentFiles.get(i).getPassword());
fragmentTransaction = activity.getFragmentManager().beginTransaction();
ShareWithinpocketDocs shareWithinpocketDocs = new ShareWithinpocketDocs();
shareWithinpocketDocs.setArguments(bundle);
fragmentTransaction.replace(R.id.frag_container, shareWithinpocketDocs, "shareWithinPocketDocs");
fragmentTransaction.addToBackStack("shareWithinPocketDocsBack").commit();
}
});
return view;
}
private class ViewHolder {
private ImageView docsImage;
private TextView tvTitle, tvPostedOn;
private Button btShare, btFav;
}
}