I have a custom ViewPager inside of an RecyclerView. I made wrap_content height of ViewPager and put onMeasure() function inside of CustomViewPager. But when I scroll down and up the RecyclerView, sometimes ViewPager is disappear. I look many SO answers but onMeasure() function not working every time for me. Method:
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec); //Deneme
int height = 0;
for(int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int h = child.getMeasuredHeight();
if(h > height) height = h;
}
if (height != 0) {
heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
ViewPager XML:
<com.monster.vpagerapp.Utils.ViewPagerFixedPost
android:id="#+id/postsViewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
Also I use this in constructor of RecylerView:
setHasStableIds(true);
And use this in MainFragment
recyclerView.getRecycledViewPool().setMaxRecycledViews(1, 0); //for unnecessary refresh
I am creating a custom ViewGroup. I does need to have 2 FrameLayout one above the other; the one that stays to the bottom must be 20dp, while the other one must cover the rest of the view.
onMeasure
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
setMeasuredDimension(widthSize, heightSize);
final View content = getChildAt(CONTENT_INDEX);
final View bar = getChildAt(BAR_INDEX);
content.measure(
MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(heightSize - getPixels(BAR_HEIGHT), MeasureSpec.EXACTLY)
);
bar.measure(
MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(getPixels(BAR_HEIGHT), MeasureSpec.EXACTLY)
);
onLayout
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
mInLayout = true;
final View content = getChildAt(CONTENT_INDEX);
final View bar = getChildAt(BAR_INDEX);
if (content.getVisibility() != GONE) {
content.layout(0, 0, content.getMeasuredWidth(), content.getMeasuredHeight());
}
if (bar.getVisibility() != GONE) {
bar.layout(0, content.getMeasuredHeight(), bar.getMeasuredWidth(), 0);
}
mInLayout = false;
mFirstLayout = false;
}
}
The views I am adding to this custom ViewGroup
LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
mContentContainer = new FrameLayout(getContext());
mContentContainer.setLayoutParams(lp);
mBarContainer = new FrameLayout(getContext());
mBarContainer.setLayoutParams(lp);
// ... adding stuff to both containers ....
addView(mContentContainer, 0);
addView(mBarContainer, 1);
The issue
mContentContainer gets rendered correctly (from top=0 to bottom=(totalHeight - bar height) and match parent for the width), while the bar is not rendered.
The last parameter in the View#layout() method is the bottom of the View. For your bar, you're passing 0, but it should be the height of your custom View, which you can figure from the t and b values passed into onLayout().
bar.layout(0, content.getMeasuredHeight(), bar.getMeasuredWidth(), b - t);
I am trying to get the view's height that would be after expending it. I am using below View.MeasureSpec to measure.
public static void expand(View summary) {
//set Visible
summary.setVisibility(View.VISIBLE);
summary.measure(
View.MeasureSpec.makeMeasureSpec(((View)summary.getParent()).getMeasuredWidth(), View.MeasureSpec.EXACTLY),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
ValueAnimator mAnimator = slideAnimator(0, summary.getMeasuredHeight(), summary);
mAnimator.start();
}
Folling this Android getMeasuredHeight returns wrong values ! and http://developer.android.com/reference/android/view/View.MeasureSpec.html
If I get the correct height the layout will be like below
But right now I am getting like below
Please suggest me some solution.
Try using the ViewTreeObserver to notify you when the View has finished measurments and layouting; it should be able to tell you it's exact size then.
Sample code:
ViewTreeObserver vto = view.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
int bodyOffset = 0;
if (textPart != null) {
bodyOffset = textPart.getTop();
}
Log.d(Constants.LOGTAG, "body bottom = " + (body.getBottom() + bodyOffset));
Log.d(Constants.LOGTAG, "ok button top = " + okButton.getTop());
if (body.getBottom() + bodyOffset > okButton.getTop()) {
body.setVisibility(View.GONE);
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
}
});
I am implementing custom layout.
I put ImageViews to my layout and in onMeasure() method call all children child.measure(w, h)
Everything works fine instead of wrap_content behavior.
Views behave like they are match_parent and are full screen size instead of wrap content.
When I want to make view to be wrap_content doing this
if (boxSize == MyBox.RATIO_MEASURE) {
spec = MeasureSpec.AT_MOST;
size = containerSize;
code:
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
for (int i = 0; i < getChildCount(); i++) {
View v = getChildAt(i);
// custom layout logic
MyBox box = getBox(v);
int width = getMeasuredSpec(box.getWidth(), widthMeasureSpec);
int height = getMeasuredSpec(box.getHeight(), heightMeasureSpec);
v.measure(width, height);
}
}
private int getMeasuredSpec(float boxSize, int containerSpec) {
int containerSize = MeasureSpec.getSize(containerSpec);
int spec;
int size;
if (boxSize == MyBox.RATIO_MEASURE) {
spec = MeasureSpec.AT_MOST;
size = containerSize;
} else if (boxSize == 1) {
spec = MeasureSpec.AT_MOST;
size = containerSize;
} else {
spec = MeasureSpec.EXACTLY;
size = (int) (MyBox.isScreenDependent(boxSize)
? containerSize * boxSize
: boxSize);
}
return MeasureSpec.makeMeasureSpec(size, spec);
}
Hrm.... this seems tricky b/c you are doing it from inside Java.
I think the magical class that you want is LayoutParams
https://developer.android.com/reference/android/view/ViewGroup.LayoutParams.html#MATCH_PARENT
int WRAP_CONTENT= -2;
LayoutParams params= new ViewGroup.LayoutParams(WRAP_CONTENT, WRAP_CONTENT);
ImageView bNext_Word = (ImageView) rootView.findViewById(R.id.myimage);
mImage.setLayoutParams( params);
I am using expandable list view to make 3 - level hierarchy, would like to know how to set internal list height and width.
I knew we have onMeasure for this purpose but in my case it not allowing me to capture whole space of parent list view.
may be I am giving wrong value to it, here is the code which is I am using for setting height and width of child expandable list.
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
widthMeasureSpec = MeasureSpec.makeMeasureSpec(960,MeasureSpec.AT_MOST);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(800,MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
Currently it appearing as follow
<ParentGroup1 >
<ChildParentGroup>
<Child1>
<Child2>
<child3>
<ParentGroup2 >
and it should appear like below.
<ParentGroup1 >
<ChildParentGroup >
<Child1 >
<Child2 >
<child3 >
<ParentGroup2 >
Please advise/suggest for the same.
Thanks for your time.
Not sure if you're still looking for an answer, but this is how I did it: pass a reference to the parent view and a height measure (in this case, I used the size of the child list) in the constructor to create the child custom list.
public CustomExpandableList(Context context, View the_parentView, int the_heightMeasure)
{
super(context);
WIDTH = the_parentView!=null?the_parentView.getWidth():LayoutParams.MATCH_PARENT;
HEIGHT = the_heightMeasure * 500;
}
EDIT: Or to make the code more consistent, you could pass the width of the parentView and height measure to the constructor instead of passing the parent view itself.
CustomExpandableList(Context the_context, int the_width, int the_heightMeasure)
use this code to calculate expandable list view dynamically:
// calculate the height of expandable listView without expanded
private void setListViewHeight(ExpandableListView expListView) {
ListAdapter listAdapter = expListView.getAdapter();
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, expListView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
System.out.println("i " + i);
}
ViewGroup.LayoutParams params = expListView.getLayoutParams();
params.height = totalHeight
+ (expListView.getDividerHeight() * (listAdapter.getCount() - 1));
System.out.println("params.height = " + params.height);
expListView.setLayoutParams(params);
expListView.requestLayout();
}
// calculate the height of expandable listview dynamically
private void setListViewHeight(ExpandableListView expListView, int group) {
ExpandableListAdapter listAdapter = expListView
.getExpandableListAdapter();
int totalHeight = 0;
int desiredWidth = MeasureSpec.makeMeasureSpec(expListView.getWidth(),
MeasureSpec.UNSPECIFIED);
for (int i = 0; i < listAdapter.getGroupCount(); i++) {
View groupItem = listAdapter.getGroupView(i, false, null,
expListView);
groupItem.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
totalHeight += groupItem.getMeasuredHeight();
if (((expListView.isGroupExpanded(i)) && (i == group))
|| ((!expListView.isGroupExpanded(i)) && (i == group))) {
for (int j = 0; j < listAdapter.getChildrenCount(i); j++) {
View listItem = listAdapter.getChildView(i, j, false, null,
expListView);
Log.e("Count", listAdapter.getChildrenCount(i) + "");
listItem.setLayoutParams(new ViewGroup.LayoutParams(
desiredWidth, MeasureSpec.UNSPECIFIED));
// listItem.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
listItem.measure(MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED), MeasureSpec
.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
totalHeight += listItem.getMeasuredHeight();
System.out.println("totalHeight" + totalHeight);
Log.e("TEST", "gshdkfmjfy,");
}
}
}
ViewGroup.LayoutParams params = expListView.getLayoutParams();
int height = totalHeight
+ (expListView.getDividerHeight() * (listAdapter
.getGroupCount() - 1));
if (height < 10) {
height = 100;
}
params.height = height;
expListView.setLayoutParams(params);
expListView.requestLayout();
}
I succeeded in some days ago by doing this. It's a little bit more compact and without any additionnal parameter, and it works perfectly.
public static void setExpandableListViewHeightBasedOnChildren(ExpandableListView expandableListView){
ExpandableNotesListAdapter adapter = (ExpandableNotesListAdapter) expandableListView.getExpandableListAdapter();
if (adapter == null){
return;
}
int totalHeight = expandableListView.getPaddingTop() + expandableListView.getPaddingBottom();
for (int i = 0 ; i < adapter.getGroupCount() ; i++){
View groupItem = adapter.getGroupView(i, false, null, expandableListView);
groupItem.measure(View.MeasureSpec.UNSPECIFIED,View.MeasureSpec.UNSPECIFIED);
totalHeight += groupItem.getMeasuredHeight();
if (expandableListView.isGroupExpanded(i) ){
for( int j = 0 ; j < adapter.getChildrenCount(i) ; j++) {
View listItem = adapter.getChildView(i, j, false, null, expandableListView);
listItem.setLayoutParams(new LayoutParams(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED));
listItem.measure(View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
totalHeight += listItem.getMeasuredHeight();
}
}
}
ViewGroup.LayoutParams params = expandableListView.getLayoutParams();
int height = totalHeight + expandableListView.getDividerHeight() * (adapter.getGroupCount() - 1);
if (height < 10)
height = 100;
params.height = height;
expandableListView.setLayoutParams(params);
expandableListView.requestLayout();
}
Don't forget to add this when you init your View, set your adapter, etc. :
Functions.setExpandableListViewHeightBasedOnChildren(listView);
listView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
#Override
public void onGroupExpand(int groupPosition) {
Functions.setExpandableListViewHeightBasedOnChildren(listView);
}
});
Create one layout xml file for ParentGroup and ChildParentGroup , another layout xml file for Child. Now you are problem is reduced to two level hierarchy. Then In Expandable listview we have Parent view and childview methods to inflate and use the Parent and Child layouts. So in that mehods you can do whatever you want.
Simply remove the width code and it should work fine.
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
heightMeasureSpec = MeasureSpec.makeMeasureSpec(999999, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
I know its late, but if anyone has the same issue. You can solve it by creating a Custom ExpandableListView and using "MeasureSpec.EXACTLY":
public class CustomExpListView extends ExpandableListView{
public CustomExpListView(Context context){
super(context);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
widthMeasureSpec = MeasureSpec.makeMeasureSpec(960, MeasureSpec.EXACTLY);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(20000, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
Hope this helps to anyone. For me its working.
Adding to muhammadSalem's answer. This is how I solved my problem by calculating the height of expandableListView's children's total height.
private fun getSubItemTotalHeight(groupPosition: Int): Int {
val children: Int = mAdapter.getChildrenCount(groupPosition)
val desiredWidth: Int = View.MeasureSpec.makeMeasureSpec(mExpandableListView.width,
View.MeasureSpec.UNSPECIFIED)
var subItemTotalHeight = 0
repeat(children) {
val child = mAdapter.getChildView(groupPosition, it, true, null, null)
child.layoutParams = ViewGroup.LayoutParams(
desiredWidth, View.MeasureSpec.UNSPECIFIED)
child.measure(View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED))
subItemTotalHeight += child.measuredHeight
}
val dividerCount = children - 1
val dividerTotalCount = (dividerCount * mExpandableListView.dividerHeight).toFloat()
showToast(mExpandableListView.dividerHeight.toString())
val totalDividerPixels = TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dividerTotalCount,
resources.displayMetrics
)
return subItemTotalHeight + totalDividerPixels.toInt()
}
One thing to note is that if you added a divider height for your expandableListview, you should include the calculations for it. What I did is convert the total divider height which is in dp into pixels and added it into the totalHeight. This solved the clipping issues I encountered.
Then to use it would be just :
mExpandableListView.setOnGroupExpandListener { groupPosition ->
mExpandableListView.layoutParams.height += getSubItemTotalHeight(groupPosition)
mExpandableListView.requestLayout()
}
mExpandableListView.setOnGroupCollapseListener { groupPosition ->
mExpandableListView.layoutParams.height -= getSubItemTotalHeight(groupPosition)
mExpandableListView.requestLayout()
}