getView（）在GridView控件的多个电话 [英] Multiple calling of getView() in GridView
问题描述
我的活动由GridView中持有超过40元的。开始活动的用户可以看到最大的15个项目（3行，5项在每一行）之后。我写的getView（）的身体传递给越来越查看LogCat中号：
My Activity consists of GridView which holds 40+ elements. After starting activity user could see maximum 15 items (3 rows, 5 items in each row). I wrote in getView() body to pass to the LogCat number of getting View:
Log.i("getView()", "GETTING VIEW_POSITION[" + String.valueOf(position) + "]" + (convertView != null?convertView.toString():"null"));
启动我的应用程序后，我得到这样的日志：
After launching my app I get such log:
02-09 14:34:56.900: INFO/getView()(388): GETTING VIEW_POSITION[0]null
02-09 14:34:57.300: INFO/getView()(388): GETTING VIEW_POSITION[0]android.widget.FrameLayout@44c7a9c0
02-09 14:34:57.300: INFO/getView()(388): GETTING VIEW_POSITION[1]null
02-09 14:34:57.400: INFO/getView()(388): GETTING VIEW_POSITION[2]null
02-09 14:34:57.510: INFO/getView()(388): GETTING VIEW_POSITION[3]null
02-09 14:34:57.620: INFO/getView()(388): GETTING VIEW_POSITION[4]null
02-09 14:34:57.720: INFO/getView()(388): GETTING VIEW_POSITION[5]null
02-09 14:34:57.840: INFO/getView()(388): GETTING VIEW_POSITION[6]null
02-09 14:34:57.930: INFO/getView()(388): GETTING VIEW_POSITION[7]null
02-09 14:34:58.273: DEBUG/dalvikvm(388): GC freed 3530 objects / 322744 bytes in 270ms
02-09 14:34:58.280: INFO/getView()(388): GETTING VIEW_POSITION[8]null
02-09 14:34:58.300: INFO/getView()(388): GETTING VIEW_POSITION[9]null
02-09 14:34:58.320: INFO/getView()(388): GETTING VIEW_POSITION[10]null
02-09 14:34:58.340: INFO/getView()(388): GETTING VIEW_POSITION[11]null
02-09 14:34:58.360: INFO/getView()(388): GETTING VIEW_POSITION[12]null
02-09 14:34:58.380: INFO/getView()(388): GETTING VIEW_POSITION[13]null
02-09 14:34:58.400: INFO/getView()(388): GETTING VIEW_POSITION[14]null
02-09 14:34:59.220: INFO/getView()(388): GETTING VIEW_POSITION[0]null
02-09 14:34:59.490: INFO/getView()(388): GETTING VIEW_POSITION[0]android.widget.FrameLayout@44c69ef0
我也红了这个发布有关这类问题。但是，我的GridView的高度XML描述设置填充母：
I also red this post about such kind of issue. But My GridView's height in XML description set as fill parent:
<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/grid"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:horizontalSpacing="10dp"
android:verticalSpacing="10dp"
android:columnWidth="140dp"
android:gravity="center"
android:scrollbars="none"
/>
和最终消除所有疑虑，这是我的适配器code：
And finally to remove all doubts, here is my Adapter code:
public class ImageAdapter extends BaseAdapter
{
private Activity activity;
private LayoutInflater inflater = null;
private ArrayList<Photo> photoes;
public ImageAdapter(Activity a, ArrayList<Photo> pictures)
{
photoes = pictures;
activity = a;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
Log.i("getView()", "GETTING VIEW_POSITION[" + String.valueOf(position) + "]" + (convertView != null?convertView.toString():"null"));
View mViewSlice = convertView;
if(convertView == null) {
mViewSlice = inflater.inflate(R.layout.photo_preview, null);
((TextView) mViewSlice.findViewById(R.id.name_of_photo)).setText(photoes.get(position).getName());
mViewSlice.setPadding(5, 5, 5, 5);
mViewSlice.setLayoutParams(new GridView.LayoutParams(-2, -2));
}
return mViewSlice;
}
@Override
public int getCount() {
return photoes.size();
}
@Override
public Object getItem(int position) {
return photoes.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
}
我希望有人会回应我的问题，并会帮助我解决这个问题。
I hope somebody will respond at my problem and will help me to solve it.
等待你的建议。亚历克斯。
Waiting for your suggestions. Alex.
推荐答案
该链接的响应，如果很清楚，我认为
The response on that link if quite clear I think
绝对没有任何保证的 次数）的数目getView（将 对于任何给定的位置调用
There is absolutely no guarantee on the number of times getView() will be invoked for any given position
现在这句话也意味着你不应该使用 WRAP_CONTENT
Now this remark also implies you shouldn't use wrap_content
通常发生在列表和网格 具有高度设置为WRAP_CONTENT
usually occurs with lists and grids that have a height set to wrap_content
但是，这并不意味着它不会发生的其他情形。该错误已关闭，WorkingAsIntended，所以我不认为你可以做的太多。这只是事情都有可能发生。
But that does not mean it would not happen for other situations. The bug was closed as "WorkingAsIntended", so I don't think you can do too much. It's just something that can happen.
这篇关于getView（）在GridView控件的多个电话的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
