Set a ListView scrolled to bottom at app start? (android) - android

I dont want to scroll it (becz i think it takes time and perfomance to scroll). I want to set it already scrolled to bottom at the start of the activity like whatsapp.
How could this be done?


If you want your ListView to be always scrolled at the bottom even on updating, you can add these attributes to the list:
android:stackFromBottom="true"
android:transcriptMode="alwaysScroll"
Otherwise use :
listView.setSelection(adapter.getCount() - 1);


listview.setSelection(LastItemIndexInListView);
LastItemIndexInListView : size of listview - 1.


listView.post(new Runnable() {
#Override
public void run() {
listView.scrollTo(0, listView.getBottom());
}
});
Give this a shot.


listView.post(new Runnable() {
#Override
public void run() {
listView.setSelection(listView.getCount() - 1);
}
});
This should work for you

Related

Programmatically make a click or touch an item in recyclerview

How to force a click or touch an item on a recyclerview?
I found people talking to use a command recyclerView.findViewHolderForAdapterPosition(0).itemView.performClick() but recyclerView.findViewHolderForAdapterPosition(0) always returns null!
I want initially that the first recyclerview item is clicked/ touched.

new Handler().postDelayed(new Runnable() {
#Override
public void run() {
recyclerView.findViewHolderForAdapterPosition(position).itemView.performClick();
}
},100);

ListView doesn't scroll to end, when keyboard using

My ListView should automatically scroll to end, when new message received or sent.
But when I use Android keyboard to send message from EditText below ListView, ListView resized and new message, which I want to send, appears out of screen and I have to scroll down to see it, even if keyboard disappears and ListView resizes again.
To scroll ListView I use:
listView.postDelayed(new Runnable() {
#Override
public void run() {
listView.setSelection(listView.getCount());
}
}, 100);
but is not working correctly in my case.
Does anyone know why it may occur? Is there a way, which ALWAYS scroll ListView to end?
Thanks, your help is much appreciated!

Try this insead of your code:
listView.setTranscriptMode(ListView.TRANSCRIPT_MODE_ALWAYS_SCROLL);
(or set it by XML layout).

You can try to add this line of code after you set selection to your list:
listView.smoothScrollToPosition(listView.getCount());
Resulting code should look like this:
listView.postDelayed(new Runnable() {
#Override
public void run() {
listView.setSelection(listView.getCount());
listView.smoothScrollToPosition(listView.getCount());
}
}, 100);

Set android:windowSoftInputMode in manifest for the activity to adjustPan|adjustResize.

how to scroll horizontal scroll view without animation

The problem is that I'm using the fullScroll() and scrollTo() functions to scroll but it is animated and I need it happen without user observation.
Is there a way to solve this problem?
hScrollView.post(new Runnable() {
#Override
public void run() {
hScrollView.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
}
});

Use this
// Disable the animation First
hScrollView.setSmoothScrollingEnabled(false);
// Now scroll the view
hScrollView.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
// Now enable the animation again if needed
hScrollView.setSmoothScrollingEnabled(true);

You can use hScrollView.setSmoothScrollingEnabled(false); before running the Runnable command, this will give you the desired output
// Set smooth scrolling to false
hScrollView.setSmoothScrollingEnabled(false);
// Then call the fullScroll method
hScrollView.post(new Runnable() {
#Override
public void run() {
hScrollView.fullScroll(View.FOCUS_RIGHT);
}
});

Continuously Auto-Scrolling ListView

I have a Listview in Android. I want that the Listview continuously scrolls from top to bottom by itself. It should happen infinitely
And obviously I want to capture the click on any of the items of the Listview, post that the scroll will continue
Anybody having experience with such an implementation. Please help !!

http://groups.google.com/group/android-developers/msg/753a317a8a0adf03
To scroll automatically, you can use this: listView.smoothScrollToPosition(position);
private void scrollMyListViewToBottom() {
myListView.post(new Runnable() {
#Override
public void run() {
// Select the last row so it will scroll into view...
listView.smoothScrollToPosition(myListAdapter.getCount() - 1);
// Just add something to scroll to the top ;-)
}
});
}

how can move scroll bar automatically?

I am using grid view for display images, I want to scroll move automatically, whenever I add another images in gridview, is it possible?

I think you have to read a little bit more :
https://developer.android.com/reference/android/widget/AdapterView.html#setSelection(int)
ListView.setSelection(position);
https://developer.android.com/reference/android/widget/AbsListView.html#smoothScrollToPosition(int)
ListView.smoothScrollToPosition(position).

Either call setSelection() or use smoothScrollToPosition().

I got result using GridView.setSelection(GridView.getCount()),so scroll bar automatically move to last element of Grid View

Use TimerTask to do that since Adapter.notifyDataSetChanged() takes delay to update the grid or list.
Code is below:
new Timer().schedule(new TimerTask()
{
#Override
public void run() {
nameHandler.sendEmptyMessage(0);
}
},500);
//// And in handler::
Handler nameHandler = new Handler()
{
public void handleMessage(Message msg)
{
super.handleMessage(msg);
gridView.setSelection(selectorIndex);
// OR
gridView.smoothScrollToPosition(selectorIndex);
gridView.invalidate();
}
} ;

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