[英]Gridview repeating images but not the text in android
在ImageView
,我的图像(而不是文本)被重新排列。 这是我的getView()方法:
public View getView(int position, View convertView, ViewGroup parent) {
View v;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mainActivity.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
v = inflater.inflate(R.layout.item_people, parent, false);
} else {
v = (View) convertView;
}
TextView textView = (TextView) v.findViewById(R.id.name);
ImageView imageView = (ImageView) v.findViewById(R.id.image);
if (list.get(position).getClass() == SearchData.Video.class) {
SearchData.Video video = (SearchData.Video) list.get(position);
textView.setText(video.getVideoName());
if (video.getCoverPicture().length > 0)
imageView.setBackground(mainActivity.Base64toImage(video.getCoverPicture()[0].getImg()));
} else if (list.get(position).getClass() == SearchData.Actor.class) {
SearchData.Actor actor = (SearchData.Actor) list.get(position);
textView.setText(actor.getFirstName());
if (actor.getPicture().length > 0)
imageView.setBackground(mainActivity.Base64toImage(actor.getPicture()[0].getImg()));
}
return v;
}
我正在设定演员的形象和文字。 当我向下滚动然后向上滚动时,图像已经打乱了,但是没有文字。 为什么?
您是否尝试过使用ViewHolder进行相同操作
通常,当调用getView()方法时,gridview / listview会作为更改自动通知,因此这就是在gridview中图像改组/更改的原因。
因此,请尝试使用ViewHolder模式实现Gridview并避免那些拖尾的s /重新排序
这是视图持有者模式实现的示例代码。
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolderItem viewHolder;
// The convertView argument is essentially a "ScrapView" as described is Lucas post
// http://lucasr.org/2012/04/05/performance-tips-for-androids-listview/
// It will have a non-null value when ListView is asking you recycle the row layout.
// So, when convertView is not null, you should simply update its contents instead of inflating a new row layout.
if(convertView==null){
// inflate the layout
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
convertView = inflater.inflate(layoutResourceId, parent, false);
// well set up the ViewHolder
viewHolder = new ViewHolderItem();
viewHolder.textViewItem = (TextView) convertView.findViewById(R.id.textViewItem);
// store the holder with the view.
convertView.setTag(viewHolder);
}else{
// we've just avoided calling findViewById() on resource everytime
// just use the viewHolder
viewHolder = (ViewHolderItem) convertView.getTag();
}
// object item based on the position
ObjectItem objectItem = data[position];
// assign values if the object is not null
if(objectItem != null) {
// get the TextView from the ViewHolder and then set the text (item name) and tag (item ID) values
viewHolder.textViewItem.setText(objectItem.itemName);
viewHolder.textViewItem.setTag(objectItem.itemId);
}
return convertView;
}
您的ViewHodler应该是这样的
// ViewHolder.
// caches our TextView
static class ViewHolderItem {
TextView textViewItem;
}
这与您的问题并不完全相同,但是您可以按照自己的方式编辑以上逻辑。
希望能帮助到你 :)
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