How to resize a ListView programmatically - android

I'm working on a new application and i want to resize a ListView programmatically, for example from a ListView with params of 200x100 to a 100x100.
How can i resize the dimension of the ListView?

public void setListViewHeightBasedOnChildren(ListView listView) {
ArrayAdapter listAdapter = (ArrayAdapter) listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}

Related

How to set the max height of a listView in android

I put the listView in a popupWindow, when it has many items, the popupWindow exceed the screen size, so I want to limit the max height(or max item, show scroll bar if exceed) of the listView, thanks all
Try this it may be help to you
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = listView.getPaddingTop() + listView.getPaddingBottom();
for (int i = 0; i < 5; i++) //here you can set 5 row at a time if row excceded the scroll automatically available
{
View listItem = listAdapter.getView(i, null, listView);
if (listItem instanceof ViewGroup) {
listItem.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}
and you can use like this
YourAdapter mYoursAdapter = new YourAdapter();
mListview.setAdapter(mYoursAdapter);
setListViewHeightBasedOnChildren(mListview);
Create a class AppUtil in your project.Try like this:
public class AppUtil{
public static void setListViewHeightBasedOnChildren(ListView listView) {
if (listView == null) {
return;
}
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = listView.getPaddingTop() + listView.getPaddingBottom();
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
if (listItem instanceof ViewGroup) {
listItem.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}
}
To call the above method in your activity or fragment you can proceed like this:
public class MedicalReportsFragment extends Fragment {
#Bind(R.id.lv_investigative_report)
ListView investigativeReportLV;
private MedicalReportsAdapter mMedicalReportsAdapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mMedicalReportsAdapter = new MedicalReportsAdapter(getActivity(), mMedicalReportOverviews,true);
investigativeReportLV.setAdapter(mMedicalReportsAdapter);
AppUtil.setListViewHeightBasedOnChildren(investigativeReportLV);
}
}
I think you can try this trick in your layout.xml:
<ListView
android:id="#+id/list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="40dp" />
<LinearLayout
android:id="#+id/layout_bottom_button"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginTop="-40dp" />
In fact the marginBottom will reserve 40dp for the layouts below ListView, so your ListView would not cover the whole screen like before.

Infinite RecyclerView inside ScrollView?

I want a layout containing ViewPager and RecyclerView. But inside NestedScrollview, ViewPager doesn't scrolling with RecyclerView.
You have to give fixed height to your RecyclerView depending upon the number of items in a list. Use the following function to calculate ListView height.
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
and
setListViewHeightBasedOnChildren(recyclerView);

placing a StaggeredGridView inside a scrollview in android

In my application i am using StaggeredGridView and it is working fine. But when i placed it inside a scorllview and try to scroll it unfortunately the height of the StaggeredGridView is not matching with the exact grid view.
For controlling the scroll i am dynamically caluculating the height of the gridview and setting it to the gridview programatically by Based On Children items. i think it will be the problem..
here the main problem is item heights will be not same like normal gridview.
Here is my code for setGridViewHeightBasedOnChildren
public static void setListViewHeightBasedOnChildren(StaggeredGridView listView) {
SampleAdapter listAdapter = (SampleAdapter) listView.getAdapter();
if (listAdapter == null)
return;
int desiredWidth = MeasureSpec.makeMeasureSpec(listView.getWidth(), MeasureSpec.UNSPECIFIED);
int totalHeight = 0;
View view = null;
for (int i = 0; i < listAdapter.getCount(); i++) {
view = listAdapter.getView(i, view, listView);
if (i == 0)
view.setLayoutParams(new ViewGroup.LayoutParams(desiredWidth, LayoutParams.WRAP_CONTENT));
view.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
totalHeight += view.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
Can any one help me out to placed a StaggeredGridView inside a scroll view..
Thanks in advance
Try to use below code with passing no of column :
public void setListViewHeightBasedOnChildren(StaggeredGridView staggeredGridView, int columns) {
SampleAdapter listAdapter = (SampleAdapter) staggeredGridView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
int items = listAdapter.getCount();
int rows = 0;
View listItem = listAdapter.getView(0, null, staggeredGridView);
listItem.measure(0, 0);
totalHeight = listItem.getMeasuredHeight();
float x = 1;
if( items > columns ){
x = items/columns;
rows = (int) (x + 1);
totalHeight *= rows;
}
ViewGroup.LayoutParams params = gridView.getLayoutParams();
params.height = totalHeight;
gridView.setLayoutParams(params);
}

Design complex layout(Scrollview, Listview..)

I am just wondering how to create replica of this layout given below
I tried
public class Utility {
public void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}
but it fixes height of ListView.
If you say with HeaderView/FooterView will do the job, then also HOW?.
If you say take custom layout(Linear or Relative) then also i can't take ScrollView within ScrollView.
Any other workaround?
Note: The data in ListView will be dynamic(can be more based on query).

How to force height of listView to be size so that every row is visible?

I have nested listView. How to force height of listView to be size so that every row is visible ?
ListView is nested inside ScrollView so scroll doesn't work for ListView so I need to make that all items are visible inside ListView which is nested ion ScrollView ( there is above and bellow more things).
To calculate hieght of listView
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
int desiredWidth = MeasureSpec.makeMeasureSpec(listView.getWidth(),
MeasureSpec.AT_MOST);
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
Pass listview object to this methode.
setListViewHeightBasedOnChildren(listView)
you can use this code.listview contains this attribute
android:minheight="20dp";

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