1
我试图做一个HorizontalListView(by DevSmart)
,其中第一项(列)将有Ndp
宽度和所有下一个项目将有N/2dp
宽度。在我的示例N = 300
中。所以我为标准的Android ListView完美地完成了它,并且它非常棒。但是,按照与HorizontalListView完全相同的逻辑,我面临着误解。HorizontalListView缩放内容(项目布局)
所有项目的宽度和高度与HorizontalListView相同。它 doesen't什么宽度/高度我指定在
photo.xml
。 而作为一个结果我得到的物品宽和高大的整个屏幕(因为我com.example.yura.listviewscale.HorizontalListView
有match_parent
宽度和高度)
有人可以帮助我吗?
activity_main.xml中:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.yura.listviewscale.MainActivity" >
<com.example.yura.listviewscale.HorizontalListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/myHzListView" />
</LinearLayout>
photo.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="300dp"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parnet"
android:layout_height="match_parent"
android:id="@+id/photoView" />
</RelativeLayout>
适配器类的存根:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.photo, parent, false);
viewHolder = new ViewHolder();
viewHolder.photoImageView = (ImageView) convertView.findViewById(R.id.photoView);
mInitialWidth = convertView.getLayoutParams().height;
convertView.setTag(viewHolder);
} else
viewHolder = (ViewHolder)convertView.getTag();
Photo photo = mPhotoList.get(position);
if (position != 0) {
RelativeLayout.LayoutParams params = convertView.getLayoutParams();
params.width = (int) (mInitialWidth * 0.5f);
}
viewHolder.photoImageView.setBackgroundDrawable(photo.getDrawable());
return convertView;
}
static final class ViewHolder {
ImageView photoImageView;
}