I want to achieve a animated scrolling menu options in ANDROID like the following functionality in iOS
https://www.youtube.com/watch?v=1NkuChdWA_I
I have try to do it by onScrollUp and onScrollDown listview, but unable to find the desire result.
private class ParallaxStikkyAnimator extends HeaderStikkyAnimator {
#Override
public AnimatorBuilder getAnimatorBuilder() {
mHeader_image = getHeader().findViewById(R.id.ll_boxeshorizntal);
return AnimatorBuilder.create().applyVerticalParallax(mHeader_image);
}
#Override
public void onScroll(final int scrolledY) {
super.onScroll(scrolledY);
listview.setOnDetectScrollListener(new OnDetectScrollListener() {
#Override
public void onUpScrolling() {
// ll_boxes.setAlpha(1.0f);
Log.e("onUpScrolling", "Up scrolledY==" + scrolledY);
// slideToTop(mHeader_image, scrolledY);
if (scrolledY == 0) {
/* ll_four_boxes.setVisibility(View.VISIBLE);
ll_boxeshorizntal.setVisibility(View.GONE);*/
}
}
#Override
public void onDownScrolling() {
Log.e("onDownScrolling", "scrolledY==" + scrolledY);
// slideToBottom(mHeader_image, scrolledY);
// slideToBottom(mHeader_image, scrolledY);
DownScrolling(scrolledY);
if (scrolledY < 300) {
/* ll_four_boxes.setVisibility(View.GONE);
ll_boxeshorizntal.setVisibility(View.VISIBLE);*/
}
}
});
}
}
I can use the two view for Gone and Visible according to the scroll but how to achieve animation like iOS.
Basically i have to convert a GridView with Two row and Two column to One Row and Four Column with animation.
You can check how much scrolling is done by using scrollView.getScrollY(). And on the basis of the value make the buttons visible or hide or change their width accordingly so that you can fit four buttons in a single row and when it is at top then display 2 buttons per row.
I have two buttons Button 1, Button 2 placed horizontally like tabs. On Click of these button I am adding Linear Layout in Scroll View.
Now suppose I am clicking Button 1 and scroll down and immediately switch or click to Button 2 that scroll applies on newly added layout. I want every time on click of button content should scroll to top.
I have tried scrollview.scrollT0(0,0) and scrollview.scrollTo(0,scrollview.getTop()) but none of them is working.
I've ran into these types of issues before.
I suggest trying the following:
scrollview.post(new Runnable() {
#Override
public void run() {
scrollview.scrollTo(0, 0);
}
});
The reason this works is forces the action in the Main Thread which is where all UI Activity happens (safely, of course).
Try this . Just it is sample
private void scrollMyListViewToBottom() {
your_list.post(new Runnable() {
public void run() {
if (!running) {
// Select the last row so it will scroll into view...
your_list.setSelection(your_list.getCount() - 1);
running = true;
}
}
});
Note :
Before call this method just change Boolean running = false;
I have implemented a ListView that has the functionality that you see in many apps, where user scrolls to bottom and it loads more, that OnScrollListener is this:
public class OnScrolledToEndListener implements AbsListView.OnScrollListener
{
private int prevLast;
#Override
public void onScrollStateChanged(AbsListView absListView, int i)
{
}
#Override
public void onScroll(AbsListView absListView, int first, int visible, int total)
{
int last = first + visible;
if (last == total)
{
if (prevLast != last)
{
prevLast = last;
onScrolledToEnd();
}
}
}
public void onScrolledToEnd()
{
}
}
Now the problem is that when a user has scrolled to the bottom of a list, and hits the refresh button in my app, I want it to start over at the top of the list, because if it stays at the bottom of the list, then the scroll listener will immediately trigger. The best way I've found to solve this is by doing the following before executing the refresh:
mListView.setSelection(0);
mListView.post(
new Runnable()
{
#Override
public void run()
{
mListView.setVisibility(View.GONE);
mLoadingLayout.setVisibility(View.VISIBLE); //this is basically a progressbar
// do the refresh
}
}
);
But there is a slight flicker when the list scrolls to the top. Any ideas on how to make it look better?
I figured out the solution. Apparently setting the ListView to View.GONE makes it not update its layout, so I set it to View.INVISIBLE instead and it worked. I didn't even have to use a Runnable.
mListView.setSelection(0);
mListView.setVisibility(View.INVISIBLE);
mLoadingLayout.setVisibility(View.VISIBLE);
How can I programmatically scroll to a specific position in a ListView?
For example, I have a String[] {A,B,C,D....}, and I need to set the top visible item of the ListView to the index 21 of my String[].
For a direct scroll:
getListView().setSelection(21);
For a smooth scroll:
getListView().smoothScrollToPosition(21);
For a SmoothScroll with Scroll duration:
getListView().smoothScrollToPositionFromTop(position,offset,duration);
Parameters
position -> Position to scroll to
offset ---->Desired distance in pixels of position from the top of the view when scrolling is finished
duration-> Number of milliseconds to use for the scroll
Note: From API 11.
HandlerExploit's answer was what I was looking for, but My listview is quite lengthy and also with alphabet scroller. Then I found that the same function can take other parameters as well :)
Edit:(From AFDs suggestion)
To position the current selection:
int h1 = mListView.getHeight();
int h2 = listViewRow.getHeight();
mListView.smoothScrollToPositionFromTop(position, h1/2 - h2/2, duration);
Put your code in handler as follows,
public void timerDelayRunForScroll(long time) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
try {
lstView.smoothScrollToPosition(YOUR_POSITION);
} catch (Exception e) {}
}
}, time);
}
and then call this method like,
timerDelayRunForScroll(100);
CHEERS!!!
The Listview scroll will be positioned to top by default, but want to scroll if not visible then use this:
if (listView1.getFirstVisiblePosition() > position || listView1.getLastVisiblePosition() < position)
listView1.setSelection(position);
I have set OnGroupExpandListener and override onGroupExpand() as:
and use setSelectionFromTop() method which
Sets the selected item and positions the selection y pixels from the top edge of the ListView. (If in touch mode, the item will not be selected but it will still be positioned appropriately.) (android docs)
yourlist.setOnGroupExpandListener (new ExpandableListView.OnGroupExpandListener()
{
#Override
public void onGroupExpand(int groupPosition) {
expList.setSelectionFromTop(groupPosition, 0);
//your other code
}
});
If someone looking for a similar functionality like Gmail app,
The Listview scroll will be positioned to top by default. Thanks for the hint.
amalBit.
Just subtract it. That's it.
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
int h1 = mDrawerList.getHeight();
int h2 = header.getHeight();
mDrawerList.smoothScrollToPosition(h2-h1);
}
}, 1000);
If you want to jump directly to the desired position in a listView just use
listView.setSelection(int position);
and if you want to jump smoothly to the desired position in listView just use
listView.smoothScrollToPosition(int position);
Handling listView scrolling using UP/ Down using.button
If someone is interested in handling listView one row up/down using button. then.
public View.OnClickListener onChk = new View.OnClickListener() {
public void onClick(View v) {
int index = list.getFirstVisiblePosition();
getListView().smoothScrollToPosition(index+1); // For increment.
}
});
This is what worked for me. Combination of answers by amalBit & Melbourne Lopes
public void timerDelayRunForScroll(long time) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
try {
int h1 = mListView.getHeight();
int h2 = v.getHeight();
mListView.smoothScrollToPositionFromTop(YOUR_POSITION, h1/2 - h2/2, 500);
} catch (Exception e) {}
}
}, time);
}
and then call this method like:
timerDelayRunForScroll(400);
-If you just want the list to scroll up\dawn to a specific position:
myListView.smoothScrollToPosition(i);
-if you want to get the position of a specific item in myListView:
myListView.getItemAtPosition(i);
-also this myListView.getVerticalScrollbarPosition(i);can helps you.
Good Luck :)
You need two things to precisely define the scroll position of a listView:
To get the current listView Scroll position:
int firstVisiblePosition = listView.getFirstVisiblePosition();
int topEdge=listView.getChildAt(0).getTop(); //This gives how much the top view has been scrolled.
To set the listView Scroll position:
listView.setSelectionFromTop(firstVisiblePosition,0);
// Note the '-' sign for scrollTo..
listView.scrollTo(0,-topEdge);
it is easy
list-view.set selection(you pos);
or you can save your position with SharedPreference and when you start activity
it get preferences and setSeletion to that int
I found this solution to allow the scroll up and down using two different buttons.
As suggested by #Nepster I implement the scroll programmatically using the getFirstVisiblePosition() and getLastVisiblePosition() to get the current position.
final ListView lwresult = (ListView) findViewById(R.id.rds_rdi_mat_list);
.....
if (list.size() > 0) {
ImageButton bnt = (ImageButton) findViewById(R.id.down_action);
bnt.setVisibility(View.VISIBLE);
bnt.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(lwresult.getLastVisiblePosition()<lwresult.getAdapter().getCount()){
lwresult.smoothScrollToPosition(lwresult.getLastVisiblePosition()+5);
}else{
lwresult.smoothScrollToPosition(lwresult.getAdapter().getCount());
}
}
});
bnt = (ImageButton) findViewById(R.id.up_action);
bnt.setVisibility(View.VISIBLE);
bnt.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(lwresult.getFirstVisiblePosition()>0){
lwresult.smoothScrollToPosition(lwresult.getFirstVisiblePosition()-5);
}else{
lwresult.smoothScrollToPosition(0);
}
}
});
}
I have a ListView which displays search results. When a search is being performed, I add a footer to the ListView which indicates that a search is in progress. I'd like to programmatically scroll my ListView to the bottom so the footer is visible to the user. Ideas?
My app is targeted to 2.1+
Use this method to scroll the ListView to bottom.
private void scrollMyListViewToBottom() {
myListView.post(new Runnable() {
#Override
public void run() {
// Select the last row so it will scroll into view...
myListView.setSelection(myListAdapter.getCount() - 1);
}
});
}
Taken from Listview Scroll to the end of the list after updating the list
try with this
lv.post(new Runnable() {
#Override
public void run() {
lv.setTranscriptMode(ListView.TRANSCRIPT_MODE_ALWAYS_SCROLL);
lv.setStackFromBottom(true);
}
});