问题描述
我有一个arrayadapter.I我列出这个项目。
I have a arrayadapter.I am listing items with this.
我的code:
static class ViewHolder {
TextView nameView;
ImageView imageView;
BadgeView badge;
}
public void placeRandomUsers(final String search) {
randomAdapter = new ArrayAdapter<JsonObject>(this, 0) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = getLayoutInflater().inflate(R.layout.random_bars, null);
holder = new ViewHolder();
holder.nameView=(TextView)convertView.findViewById(R.id.tweet);
holder.badge = new BadgeView(getContext(), holder.nameView);
holder.badge.setTextColor(Color.WHITE);
holder.badge.setBadgeBackgroundColor(Color.parseColor("#FF0019"));
holder.imageView=(ImageView)convertView.findViewById(R.id.image);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if (position >= getCount() - 3 && search.equals("") == true) {
loadRandomUsers("");
}
JsonObject user=getItem(position);
String name=user.get("name").getAsString();
String image_url="http://dd.com/profile/thumb/"+user.get("photo").getAsString();
holder.nameView.setText(name);
Ion.with(holder.imageView)
.placeholder(R.drawable.twitter)
.load(image_url);
holder.badge.setText("1");
holder.badge.hide();
return convertView;
}
};
ListView listView = (ListView)findViewById(R.id.list);
listView.setAdapter(randomAdapter);
}
正如你所看到的,我用badge.But徽章装载是不可见的,我想从具体项目另一种方法表现出来。
As you can see,I am loading with badge.But badge is not visible,I want to show it from another method for specific item.
例如: randomAdapter(position_id).holder.badge.show(); 我要一个code像this.How我可以做到这一点。
Example:randomAdapter(position_id).holder.badge.show();
I want a code like this.How can I do this ?
推荐答案
试试这个(未测试)code:
Try this (not tested) code :
int visiblePosition = position_id - listView.getFirstVisiblePosition();
View rowView = listView.getChildAt(visiblePosition);
if (rowView != null) {
ViewHolder holder = (ViewHolder) rowView.getTag();
holder.badge.show();
} else {
//Sorry the row is not visible
}
更新:这只适用于可见行结果
如果你想改变是不可见的行徽章,你应该考虑到ViewHolders存储在适配器列表,并从那里访问它们。
UPDATE: this only works for visible rows
If you want to change the badge for rows that are not visible you should consider to store the ViewHolders in a list in the adapter and accessing them from there.
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