Android :: ListView Jump To Cursor Position

Aug 10, 2010

I have a ListView that is controlled by a standard BaseAdapter.When the user clicks a button, I want the ListView to Scroll into view the 100th record.How is that done?

Android :: ListView Jump to cursor position


Android :: An App To Display Cursor Position

May 29, 2009

I am new in Android application programming.I need to develop an android application which simply displays the cursor position (co ordinates) very urgently.If any has some pointers in same would be a great help to me.

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Android :: Cursor Position At The End Of Text

Aug 26, 2009

When i try to edit and already stored notepad ,i see the cursor at the end of first line.I want to make it appear to the end of the text.Please help me in this.

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Android :: How To Input Cursor Position On Tap?

Feb 18, 2010

I want to read my cursor position so that, after a tap, I can convert the screen x,y coordinates to a Geopoint for distance calculations.I found a snippet to convert x,y coordinates to a Geopoint and probably could use Projection instead, but how do I input those screen x,y values in the first place? This is probably straightforward, but I'm confused.The class Cursor seems to be something different than what I need

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Android :: EditText's Cursor Position

Aug 10, 2010

User wrote some text in EditText, then touched it somewhere in its field. Cursor position changed.I need to determine changed cursor position, and do some code. How can I do this?

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Android :: Moving Cursor Position To A Certain ID

Sep 23, 2010

My user can flick through a set of records.I save the last seen record _ID in Preferences, so that they can start off from where they left when they access the application next time.The cursor that I have extracts _ID field too.However, I don't know how to move cursor to that particular row.The following functions of the cursor need a specific position to go to :- The _ID may not be sequential (due to deletes etc).Any way to do this?

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Android :: Cursor Position In The EditText

Jul 15, 2009

I was going through the notepad tutorials.the cursor was placed in the middle of edit text.i tried to make the cursor to point in the first line as shown in the pic but not able to find the solution for it.Kindly look at the pic and give favorable reply.

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Android :: Get A Line Number Under Cursor Position?

Oct 27, 2010

Given a multi-line EditText, how can I know the line number at cursor position?

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Android :: EditText Listener For Cursor Position Change

Sep 6, 2010

I'm looking for a way to detect a cursor position changed in an EditText.I couldn't find anything in the documentation so far. Has anyone solved this already?

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Samsung Fascinate :: How To Position Cursor In Text Box?

Sep 17, 2010

How do you position the cursor in a text box? Evidently, some of the other Galaxy S models have an alternate keypad pop up when you press and hold the ?123 key in a text box.I have not been able to make it work on my Fascinate. See this article for details and do a search for "?123": Galaxy S Tips and Tricks (works w/ Captivate, Epic 4G, Fascinate, Vibrant)Is there some other method to accurately position the cursor as shown above?

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Android :: Set Scroll Position Of ListView?

Jul 30, 2010

I have a listview displaying my data.Ok. I want to set the scroll position in a position of my choice, but I just cant do it. I used :

myListView.setSelection( anyPosition ); myListView.setSelected(true); and has not worked. I also tried : myListView.scrollTo(0, PositionY); and myListView.scroolBy(0, PositionY);

and there's a strange behavior, this two methods doesn't put the scrool in the "PositionY", it made the "PositionY" be the first position in the list, cutting everything that exist before.

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Android :: Scroll To Position In ListView

Jun 10, 2010

I have a long listView that the user scrolls around and then returns to the previous menu. What I want is that when the user opens this list View again the list to be scrolled to where the it was previously left. Any ideas on how this can be achieved ?

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Android :: Filter Rows From Cursor - Don't Show Up In ListView

Jun 12, 2010

I have a Cursor that returns rows I use with a SimpleCursorAdapter to populate a ListView. I would like to filter some of the rows so they don't get displayed in my ListView. I use the data from the rows elsewhere in my Activity so I don't want to change my SQL to filter them with a WHERE clause. What is the best way to keep a row from being displaying in my ListView? Ideally I would check a column in my row and then only add rows to the ListView that satisfy a condition.

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Android :: Checkbox In Listview With Custom Cursor Binding

Feb 14, 2010

I think I've tried everything(made focusable:false!!) and I cant capture in anyway the selected checkbox on my list item. Even OnItemClickListener, doesn't respond to any click. How can I retrieve checked checkboxes in my list item? My list item included: image view, 4 textviews and the checkbox. Some code:

this is in my ListActivity class:
final String columns[] = new String[] { MyUsers.User._ID, MyUsers.User.MSG, MyUsers.User.LOCATION }; int[] to = new int[] { R.id.toptext, R.id.bottomtext,R.id.ChkBox, R.id.Location}; Uri myUri = Uri.parse("content://com.idan.datastorageprovider/users"); Cursor cursor = getContentResolver().query(myUri, columns, null, null, null); startManagingCursor(cursor); ListCursorAdapter myCursorAdapter=new ListCursorAdapter(this, R.layout.listitem, cursor, columns, to); this.setListAdapter(myCursorAdapter);

And this is my Custom Cursor adapter class:
public class ListCursorAdapter extends SimpleCursorAdapter { private Context context; private int layout; public ListCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to) { super(context, layout, c, from, to); this.context = context; this.layout = layout;
} @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { Cursor c = getCursor(); final LayoutInflater inflater = LayoutInflater.from(context); View v = inflater.inflate(layout, parent, false); return v;
} @Override public void bindView(View v, Context context, Cursor c) { TextView topText = (TextView) v.findViewById(R.id.toptext); if (topText != null) { topText.setText("");
} int nameCol = c.getColumnIndex(MyUsers.User.MSG); String name = c.getString(nameCol); TextView buttomTxt = (TextView) v.findViewById(R.id.bottomtext); if (buttomTxt != null) { buttomTxt.setText("Message: "+name); } nameCol = c.getColumnIndex(MyUsers.User.LOCATION);
name = c.getString(nameCol); TextView location = (TextView) v.findViewById(R.id.Location);
if (locationLinkTxt != null) { locationLinkTxt.setText(name);
}
I've tried many ways. many listeners, can't figure how to capture listener to my checkboxes. The data I am binding to the list items from the database, isn't concerned about the checkbox.. only the textviews. There isn't any connection between the database and the checkbox I have in the list's item.

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="100sp" android:focusable="false" android:focusableInTouchMode="false"> android:padding="6dip">
<ImageView android:layout_width="wrap_content"
android:layout_height="fill_parent" android:src="@drawable/icon"
android:id="@drawable/icon" android:layout_marginLeft="6dip"
android:focusable="false" android:focusableInTouchMode="false">

</ImageView> <LinearLayout android:id="@+id/LinearLayout01"
android:orientation="vertical" android:layout_width="1sp"
android:layout_height="fill_parent" android:layout_weight="1"
android:focusable="false" android:focusableInTouchMode="false">
<TextView android:id="@+id/toptext" android:layout_weight="1"
android:gravity="center_vertical" android:text="OrderNum"
android:singleLine="true" android:layout_height="0dp"
android:layout_width="wrap_content" android:focusable="false"
android:focusableInTouchMode="false">

</TextView> <TextView android:id="@+id/bottomtext" android:layout_height="wrap_content"
android:layout_width="wrap_content" android:focusable="false"
android:focusableInTouchMode="false" android:text="TweetMsg">
</TextView> <TextView android:id="@+id/twittLocation"
android:layout_weight="1" android:text="location" android:singleLine="true"
android:layout_width="fill_parent" android:layout_height="0dip"
android:focusable="false" android:focusableInTouchMode="false">
</TextView> <TextView android:layout_weight="1" android:id="@+id/twittLocationlink"
android:text="locationlink" android:gravity="fill_horizontal"
android:layout_width="fill_parent" android:layout_height="0dip"
android:focusable="false" android:focusableInTouchMode="false">
</TextView> </LinearLayout>
<CheckBox android:id="@+id/deleteTwittChkBox" android:text="Delete"
android:layout_width="wrap_content" android:layout_marginRight="2dp"
android:focusable="false" android:checked="false"
android:focusableInTouchMode="false" android:layout_height="fill_parent"></CheckBox>

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Android :: Maintaining Scroll Position Of ListView

Apr 7, 2009

In my app, my main class extends ListActivity and calls a fillData() function to reload the list whenever changes are made. I'm still getting the hang of this, so I borrowed that concept from the Android Notepadv1-Notepadv3 tutorials. Everything works great, however whenever I need to change the list (remove an item, re-sort it, edit an item), the ListView refreshes and loses its scroll position. The scroll position is reset to the top after each fillData() call.

It appears to be resetting the scroll position to the top because I'm using setListAdapter() each time in fillData(), setting it to a new SimpleCursorAdapter. How can I get the list to "update in place", where the scroll position is seamlessly maintained to the user? I tried heading down the "items.changeCursor(cursor)" path, but that didn't seam to do much for me.......................

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Android :: ItermId To Position In A ListView/Adapter

Jan 7, 2010

In a ListView/CursorAdapter, it is easy to go from a position to an itemId

CODE:..........

Is there any way to do the reverse mapping? From an itemId, get its position in the list?

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Android :: ListView Header Taking Up A Position?

Oct 26, 2010

I've just added a header to my ListView and I have to change a bunch of code because the header essentially becomes position 0 (Meaning the Cursor indices of my CursorAdapter do not line up with the indicies of the list. They are off by 1 now). Why? This seems a bit silly to me.

The only reason I can come up with is that a developer may want to access the header. Fine. Provide something like getListView().getHeader().

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Android :: Adding Headers To Listview For Cursor With Grouped Results

Jul 30, 2010

Requirement: Display query results in a list with a header view atop each group. (results grouped from database) Looking at Mark's MergeAdapter. Wondering if I might be able to use a single cursor and have each adapter filter on the group field? That a viable approach?

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Android :: Show Cursor Data In A Listview With Subsection Headings

Feb 3, 2010

I have not found an example yet with a solution to the following task.

I have a SQLite database with two tables- BOOK and AUTHOR. I execute a query on the DB that uses a join and results in a cursor that looks like this. code...

New authors and books can be added to the database at any time, and I also need the user to be able to remove books, hence the [ ] checkboxes.

So i have two row layouts, row_author.xml & row_book.xml. I detect when I need to show a row_author subheading by seeing when the current author has changed compared to the previous row. But I have realized that the rendering of an Author Row will then move the cursor forward one row and jump over their first book.

Can anyone suggest a good approach to presenting data like this? Is there a much better way to do this?

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Android :: ListView - Index And Position Behavior Upon Restart()

May 19, 2010

I am using a ListView with an ArrayAdapter that holds objects. When I select an item, I am capturing the position and index of the selected item. If I scroll down prior to selection, the position and index represent the location of the item in the list. Selecting that items takes me to another activity. When I use the back button to return to the list, it seems that the ListView gets a new position and index for the visible items.

As a result, I can't figure out how to reference the selected item during the restart() of the ListView Activity. I have tried to capture position and index, but as I've said, they change upon returning to the Activity.

Is my understanding of the ListView "redraw" correct? Does it renumber my items based on what's visible? -When in the life cycle is getView() called? Is there a way to force an update to the ListView so that my captured index still points to the same object?

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Android :: Move To A Certain Position In A ListView Upon Creation In Droid?

Apr 21, 2010

I was wondering if it is possible to start a ListActivity and in real time decide how far down the list it should be focused on. (Example: When the activity is started it checks for certain conditions and then it may scroll down to a row partially through the list.)

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Android : Maintain Position Of ListView / Another Intent And Back

Apr 27, 2010

How can I maintain the position of my ListView in my activity when I go to another activity (by launching another intent) and then come back (press the back button)?

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Android : Detect Scroll Position Inside A ListView?

Oct 10, 2009

I'm building a chat room application where new events are being polled for every X seconds. Every time that happens, this code updates the RoomAdapter (a custom subclass of ArrayAdapter) with the new data and scrolls it to the bottom:

RoomAdapter adapter = (RoomAdapter) getListAdapter();
for (int i=0; i<newEvents.size(); i++)
adapter.add(newEvents.get(i));
getListView().setSelection(events.size()-1);

This is fine, except that if the user is scrolling up to glance at the room's history, it's going to jump her down to the bottom when the poll happens. What I'd like to do is have it so that if the user is already at the bottom of the list, it stays there after a poll for new events. If the user's intentionally scrolled upwards, I'd like the user not to be disturbed.

How do I detect when I'm already scrolled to the bottom of a ListView?

Note: I can't do getListView().getSelectedItemPosition(), because as the docs note, calling setSelection when in touch mode does not actually select the item, just scrolls to it.

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Android :: Cursor Adapter - Binding Multiple Item Values In ListView

Jan 12, 2010

I have the following code to intantiate a SimpleCursorAdapter to use with a ListView. As you can see I have passed the R.layout.log_item to display the list items, and one value/control to bind to (TripDate).

SimpleCursorAdapter sca = new SimpleCursorAdapter(this, R.layout.log_item,c,new String[] {DBAdapter.KEY_LOG_TRIPDATE},new int[]{R.id.txtTripDate});

This works. I currently only have one widget in the layout xml, a TextView to hold the TripDate.
How do I pass multiple binding parameters for the additional widgets in the layout? So I can also display other info.

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Android :: Proper Implementation Of Changing ListView Data With Cursor Adapter

Sep 3, 2010

I have a ListView populated via a CursorAdapter. I give my user the ability to alter the data in the list. For example, the user can mark a row as being unread (the data are messages).

Suppose my user marked a row unread. Would a proper implementation mark the row in the database as read and then requery the Cursor?

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Android :: Droid Save Checkbox State In ListView With Cursor Adapter

Mar 9, 2010

I cant find a way to save the checkbox state when using a Cursor adapter. Everything else works fine but if i click on a checkbox it is repeated when it is recycled. Ive seen examples using array adapters but because of my lack of experience im finding it hard to translate it into using a cursor adapter. Could someone give me an example of how to go about it.code...

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Android : Setup ListView Scroll Position Nicely In Droid?

Jul 22, 2010

I am aware of setSelection(), setSelectionFromTop(), and setSelectionAfterHeaderView(), but none of them seems to do what I want.

Given an item in the list, I want to scroll so that it is in view. If the item is above the visible window of the list, I want to scroll until the item is the first visible item in the list; if the item is below the visible window, I want it to scroll up until it is the last visible item in the list. If the item is already visible, I don't want any scrolling to occur. How do I go about this?

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Android :: Moving Cursor Adapter Cursor Creation To Background Thread

Mar 29, 2010

The structure of some of my activities is a simple ListView with a custom CursorAdapter. The cursor is created in onCreate() on the activity from a SQLite database. The problem is that querying the SQLite database can be quite slow at times with lots of data (and let's assume I've already optimized the sql query as much as possible). Because it occurs in onCreate() on the UI thread, I get ugly black screens when opening the activity, which sometimes turn into ANRs, on a slow phone like the G1. I want to load the cursor in a background and show "Loading.." on screen while doing so. I saw AsyncQueryHandler used extensively in the framework, but this seems a solution geared more towards Content Providers and not application-local SQLite databases. I then thought of trying to load the cursor in a background thread, but realize that this might be problematic, as the CursorAdapter should be instantiated in onCreate() and should take a cursor as a parameter. The latest thought I had was to instantiate an empty MatrixCursor in onCreate() and pass that to the cursor adapter, while kicking off a thread/TimerTask to query the database. Then, on database cursor load, call cursorAdapter.change Cursor to the properly filled cursor. This doesn't seem very elegant and seems quite wasteful, however.

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Android :: Join ContentResolver Cursor With A Database Cursor

Mar 21, 2010

I get records from the system by quering a ContentResolver. I maintain the order of the items in the database. So I want to display the items in the order taken from my database.

How do I merge these two informations?

I am looking after an alternative way now. As what I ideally want is:

Get order of contacts by a custom order held in my database (this involves joining CR with my DB cursor, and doing an order by, later seams it's not possible with CursorJoiner) but there is more, if the join is not unique I want to sort by contact's name as last measure

Which is impossible using Cursor and Joiners, because of the missing feature of order bys, also I need to return a Cursor, as I will be using the in an ExpandableList

Also this translated to TSQL it would look like

select * from contactsdata
left join category on contactsdata.catid=category.id
order by category.pos asc, contact.display_name asc

So I am looking now after an alternative. I have in mind to load in a temporary DB table all data from CR, then do the query on the temporary table where I can join tables and do order bys? How does this sound to you?

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HTC EVO 4G :: Screen Rotation - Delay When Switch From Horizontal Position To Vertical Position

Sep 29, 2010

On my htc i was looking through display, i see g sensor calibration and i perform this calibration and after i do so the screen seems to have a delay when switch from the horizontal position to the vertical position. its weird because when i switch to the phone horizontally it switch normally and responds fast. but when i switch back to vertically it takes almost 7 seconds to actually switch back, sometimes it switch within 2 or 3 secs but never as quick as switching horizontally.

MQuote:

Originally Posted by Rigmaster

Make sure you have the latest updates, which impact speed on the device in some unpredictable and unexpected ways. During system updates, your Evo may reboot and will take the g-sensor changes as last calibrated.

If you're already updated, shut down and repower (soft reboot) should do the trick. I actually updated my phone and after it started to do this. I restarted the phone plenty of times i even took the battery out for 30 seconds. It only does it when im texting on the browser, basically everything but the camera. He camera screen rotation is perfect. I even rooted the phone but i havent figured out how to use the root to fix the problem. Should i do a firmware update? Because i just did the htc software update.

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