Question

在我的自定义适配器convertView方法中“缓存”我的getView时遇到问题。使用“缓存”时

if (convertView == null) ...

即使用户未经过验证，有时也会显示我的verifiedView。删除if构造并只使用row = convertView;时，一切都按预期工作。知道如何解决这个问题吗？

@Override
public View getView(int position, View convertView, ViewGroup parent) {     
    View row;

    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE);
        row = inflater.inflate(resource, parent, false);
    } else {
        row = convertView;
    }

     UserProfile user = users.get(position);
    // get views
    TextView usernameView = (TextView) row.findViewById(R.id.username);
    ImageView avatarView = (ImageView) row.findViewById(R.id.avatar);
    ImageView verifiedView = (ImageView) row.findViewById(R.id.verified);

    // check if user has an custom avatar
    if (!user.getAvatar().isEmpty()) {
        // now check if we already downloaded the avatar
        InputStream is = AvatarHandler.getAvatar(this.context, user.getID());
        if (is != null) {
            Bitmap bmp = BitmapFactory.decodeStream(is);
            System.out.println("Avatar already downloaded.");
            avatarView.setImageBitmap(bmp);
        }
    }
    else {
        // set default avatar
        avatarView.setImageResource(R.drawable.avatar);         
    }

    // set username
    usernameView.setText(user.getName());

    // set verified
    if (user.isVerified())
        verifiedView.setVisibility(View.VISIBLE);

    return row;
}

Answer 1

如果用户未经过验证，您应隐藏verifiedView：

// set verified
if (user.isVerified()) {
        verifiedView.setVisibility(View.VISIBLE);
} else {
        verifiedView.setVisibility(View.GONE);
}

ArrayAdater getView＆＃34;缓存＆＃34; convertView

1 个答案: