以编程方式设置ListView的高度 [英] Set ListView Height Programmatically
问题描述
我的活动中有一个TextView
和ListView
.ListView
最初设置为Visibility = gone
我需要一个功能,例如用户单击TextView
,ListView
绑定并显示为"Wrap_Content" .到目前为止,我已经编写了代码
I have a TextView
and ListView
in my activity.ListView
intially set to Visibility = gone
I need a functionality like if user click on TextView
, ListView
binds and will show to `Wrap_Content'. I have write the code so far
我的XMl文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/txtDate"
android:textSize="50dp"
android:background="@color/colorSplash"
android:text="20-11-2016"/>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/lstDesc"
android:visibility="gone" />
Java代码
private void BindBookedList(){
final ArrayList<String> arr = new ArrayList<>();
arr.add("21-11-2016");
arr.add("22-11-2016");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.list_collapse, arr){
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.list_collapse, null);
}
final TextView txtDate = (TextView) v.findViewById(R.id.txtDate);
final ListView lstDesc = (ListView) v.findViewById(R.id.lstDesc);
String strItemDAta = arr.get(position);
txtDate.setText(strItemDAta);
String[] arrContries = getResources().getStringArray(R.array.ListOfAirport);
ArrayAdapter<String> adapter = new ArrayAdapter<String>
(getApplicationContext(), R.layout.spinner_item, arrContries);
lstDesc.setAdapter(adapter);
txtDate.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
com.kommlabs.pikmybox.MyUtlilites.ViewAnimationUtils.expand(lstDesc);
}
});
return v;
}
};
ListView listBooked = ((ListView) findViewById(R.id.lstBookedPackages));
listBooked.setAdapter(adapter);
}
ViewAnimationUtils类
public class ViewAnimationUtils {
static View view;
public static void expand(View v) {
view = v;
v.measure(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
final int targtetHeight = v.getMeasuredHeight();
v.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
v.setVisibility(View.VISIBLE);
}
在此代码中,我正在调用ViewAnimationUtils
类的Expand
函数.在扩展功能中,我将布局高度设置为Wrap_Content
,但是Listview渲染高度最多仅显示一项. Listview
绑定有8个项目.
In this code, i am calling Expand
function of ViewAnimationUtils
class. In expand function i have set layout height to Wrap_Content
but Listview render height upto show only one item. Listview
has 8 items on bind.
如何设置ListView
的高度以显示列表中的所有项目?
How to set height of ListView
to show all items in list ?
推荐答案
这将为您提供帮助.
ListAdapter listadp = listview.getAdapter();
if (listadp != null) {
int totalHeight = 0;
for (int i = 0; i < listadp.getCount(); i++) {
View listItem = listadp.getView(i, null, listview);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listview.getLayoutParams();
params.height = totalHeight + (listview.getDividerHeight() * (listadp.getCount() - 1));
listview.setLayoutParams(params);
listview.requestLayout();
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