【发布时间】:2015-12-21 21:57:36
【问题描述】:
我正在尝试创建一个HorizontalListView(by DevSmart),其中第一项(列)将具有Ndp 宽度,所有下一项将具有N/2dp 宽度。在我的例子中N = 300。所以我为标准的 Android ListView 完美地完成了它,它工作得很好。但是遵循与 HorizontalListView 完全相同的逻辑,我面临着误解。
所有项目的宽度和高度都与 HorizontalListView 相同。它 我在
photo.xml中指定的宽度/高度无关紧要。 结果,我的项目在整个屏幕上都变得又宽又高(因为我的com.example.yura.listviewscale.HorizontalListView有match_parent的宽度和高度)
有人可以帮我吗?
activity_main.xml:
<?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;
}
【问题讨论】:
标签: java android listview horizontallistview