Android :: How To Implement Position In Image Adapter To Return Customized View?
Jul 12, 2010
Sample code there is a method getitem(position) in the class of image adapter which returns null for the sample example. However, this method is important and is supposed to return the corresponding data item of the image adapter. For example the image adapter could generate a series of customized image views by magically calling the getview method. How could we implement the getitem(position) method under this case to help us gain access to these customized image views?
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Dec 7, 2009
I have implemented a custom adapter the extends from the BaseAdapter and implements the getView method. It works fine except for one thing, not once do I get the convert View (a parameter to the getView method) that is not null (that can be reused).
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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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Dec 17, 2009
I custom the BaseAdapter to show image array with full-screen mode. I want the user can flick the images so I use the gallery class.When a image displays on the screen, a correlative sentence should be showed as well. The issue is the position param in getView function jump abnormally, especially when I flick into more one picture at a time. Therefore the string is showed incorrectly, I don't know why the image still displays normally. Here is my code...
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Jul 24, 2010
I have a GridView in my activity, and I want to save current scroll position while user goes to another place and restore it while user comes back. I try to use GridView.getScrollY and GridView.scrollTo methods, but getScrollY method always return 0 instead of right scroll position. Am I using this method in a wrong way?
Could anyone who can teach me how to retrieve the scroll position in a GridView?
I searched the Internet found that someone said we can use getSelectedItemPosition and setSelection methods, but this requires user to select at least one item, how about the case that no items is selected?
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Jan 11, 2010
I want to create an application that loads an image as a map (a building of a floor) and add coordinates to it. Can anyone has an idea how to do it? I can do it maybe with MapView and change the resource of the map to my image but it is still not working.
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Sep 25, 2009
I tries to modify the look of radiobutton: <style name="MyRadioButton" parent="android:Widget.CompoundButton.RadioButton"> <item name="android:textColor">#FF0000</item> <item name="android:background">@drawable/btn_radio</item> </style>
Android:background doesn't seem to be the right property, the radio button image gets stretched and placed in the background of the radio button itself and its label.
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Oct 5, 2010
The emulator screen does not show up with new zImage... The steps I followed are: 1) Downloaded the android kernel from "git clone git://github.com/CyanogenMod/cm-kernel.git" 2) extracted config file from config.gz from /proc/config.gz in emulator 3) copied config file to .config in "cm-kernel" directory 4) export CCOMPILER=${HOME}/android/system/prebuilt/linux-x86/ toolchain/arm-eabi-4.4.0/bin/arm-eabi- 5) make ARCH=arm CROSS_COMPILE=$CCOMPILER oldconfig make ARCH=arm CROSS_COMPILE=$CCOMPILER menuconfig make ARCH=arm CROSS_COMPILE=$CCOMPILER
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May 18, 2010
I have a HorizontalScrollView with a series of CompoundButtons. I want to find the (x,y) for a given child view. I have tried using:
getLocationOnScreen()
getLocalVisibleRect()
getChildVisibleRect()
like this:
View tmpView = this.findViewById(viewId);
Rect hitRect = new Rect();
tmpView.getLocalVisibleRect(hitRect);
the hitRect is always 0,0 - 0,0.
I need the x,y mainly to scroll to a particular child view. Any help is greatly appreciated.
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Jun 6, 2010
If i got a new message, in notification expanded view it shows only time. suppose If i got a message today(i.e on 06/06/2010) it should display simply a string "Today" and tomorrow it should show date on whilch message was received i.e it should display date 06/06/2010
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Jul 21, 2010
I use http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview/3068012#3068012 to load images in a ListView and a GridView. It works but the images are loaded form bpttom to top. How to fix that?
Bonus Question: Can I use a loading animation in a image view while the real image is loaded? Right now it's just a default image.
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Jun 2, 2010
I have a simple task (simple in other platforms, not in Android :-( ): take a photo and return its pathname to the caller. I searched a lot the net and tried many variants to the code. I'm aware of the "thumbnail image" bug and am trying to bypass it. The following code works, but its somewhat dificult to get the photo: the guy has to go to the media picker, click menu button, select "camera capture", take the photo, click back, and finally select the photo from the list. The good thing: the photo returned is BIG.
Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("image/*");
startActivityForResult(intent, TAKE_PHOTO);
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) { case TAKE_PHOTO: if (resultCode == RESULT_OK)
try { Uri uri = data.getData(); java.io.InputStream is = getContentResolver().openInputStream(uri);
java.io.FileOutputStream os = new java.io.FileOutputStream(targetPhotoName);
byte[] buf = new byte[4096]; int r; while ((r = is.read(buf)) > 0) os.write(buf,0,r);
is.close(); os.close(); Launcher4A.pictureTaken(0,null);
} catch (Exception e) { String stack = Log.getStackTraceString(e);
AndroidUtils.debug(stack); } break; }
I also saw a code that (in theory) would do exactly what I need:
sourcePhotoName = Environment.getExternalStorageDirectory() + java.io.File.separator + "tmpPhoto.jpg"; targetPhotoName = s;
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
Uri uri = Uri.fromFile(new java.io.File(sourcePhotoName));
i.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(i, TAKE_PHOTO);
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{ switch (requestCode) { case TAKE_PHOTO: if (resultCode == RESULT_OK)
try { java.io.InputStream is = new FileInputStream(sourcePhotoName);
java.io.FileOutputStream os = new java.io.FileOutputStream(targetPhotoName);
byte[] buf = new byte[4096]; int r; while ((r = is.read(buf)) > 0) os.write(buf,0,r);
is.close(); os.close(); } catch (Exception e) {
String stack = Log.getStackTraceString(e); AndroidUtils.debug(stack);
} break; } }
It works (almost) as expected: the camera application is shown, and after the photo is taken, the photo is returned to the application. However, it has two problems:
1. If I pass a folder inside my application's directory, when I press "done" button, the camera application does not return; it stays in the same screen until I press cancel. Seems that the camera application does not have permissions to write to my folder.
2. The image returned from this code is the Small Image (Thumbnail).
So, I now have a code that works and return a big image, but is somewhat burocratic to the guy to use (and also can lead to errors, if he selects the wrong picture), and a code that does what i want but returns a small picture. I'm using a HTC G2 with Android 1.6, and I have to use it because 1.6 is the requirement for my system. Ok, now the question: is there something I can do in code #2 to make it return the big picture?
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Aug 15, 2010
I m trying to add remove and position an image but i am not able to. The image always shows up at 0, 0 . I am using an image view to do this..
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Oct 19, 2010
How to get image coordinates at mouse hover position.
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Jan 7, 2010
So here's the problem. I am displaying a big image in ImageView and need to find it's position relative to the image.
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Jan 8, 2010
Can anyone give me a tip for how to get the position of a view what is a child of an AbsoluteLayout? I want to do this for drag and drop the selected view.
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Sep 1, 2010
Can I get a View's x/y position (relative to the root layout of my Activity) in Android?
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Feb 3, 2010
I'm trying to do something which seems simple. I want to have a map view, with a menu that slides up from the bottom of the screen where settings (for overlay) can be adjusted. However when I use a TranslateAnimation to affect the y position of the LinearLayout (which holds the menu), the buttons in the LinearLayout move, but there "hit area" stays in the same position as they were before the animation.
CODE:.........
I've also looked into tweening the view's marginTop value, but haven't even been able to determine how that would be done.
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Apr 8, 2010
I want to write a short app for getting some info from contacts, the first list screen I have should display the user Image (or an Image from resources if no such image exists) an the user display name. The problem is I don't seem to find a query that will provide me with the display name and a user id And the image URI in the same query. Moreover I'm aware of the fact that if the user has no image and the URI is empty or null i will most likely to get an exception while the adapter calls setViewImage(). Is there a simple way around it or should I override the setViewImage() or bindView() methods?
Also about the query, any chance I can make a single query for contact URI, _ID, contact_id and display name? my current queries: To get the contacts:
private Cursor getContacts() { Uri uri = ContactsContract.Data.CONTENT_URI;
String[] projection = new String[] ContactsContract.Data._ID,ContactsContract.Data.CONTACT_ID,
ContactsContract.Data.DISPLAY_NAME };
String selection = ContactsContract.Data.MIMETYPE + " = ?";
String[] selectionArgs = {ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_ITEM_TYPE};
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " ASC";
return managedQuery(uri, projection, selection, selectionArgs, sortOrder); }
If I have a contact id and want the image:
int _id = m_cursor.getColumnIndex(ContactsContract.Contacts._ID);
//try to retrieve the photo, if exists.
Uri photoUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI,
m_cursor.getLong(_id)); InputStream is = ContactsContract.Contacts.openContactPhotoInputStream(m_context.getContentResolver(), photoUri);
Here I get from a cursor with _ID column the id and then creating the uri, I know I can get a row number but I'm not familiar enough with contentProvider to know how to join tables to get it all in one query (if even possible).
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Sep 10, 2010
I've got a little problem...Well, let me first state what I'm trying to accomplish. I had a spinner that pulls strings out of a stored array.
Like so, you dont need to read it though:
CODE:...........................
So far I've got a custom SimpleAdapter.
Here is the Problem!! : the text comes up but not the image. Heres the code:
CODE:........
I plan to use a switch statement to set different images to each name. however i stopped here until i can get any image to show. How i'm calling
CODE:........................
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Oct 20, 2011
Im making an app in which the user selects an image and then gets redirected to a new screen in which the drawable name is displayed.
This is the code triggered when the user click an image:
Code:
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intent tabsIntent = new Intent();
tabsIntent.setClassName("com.budisha.app", "com.budisha.app.TabClassActivity");
tabsIntent.putExtra("pic_name", position); //sends picture position
startActivity(tabsIntent);
}
This sends the new activity the drawable position. But i need to get the drawable name.
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Jan 31, 2009
I want to create custom View showing possibly several items. i think using Adapter interface would be good idea.
My question is: should i extend AdapterView? if so, what is the most imortant when doing this (e.g. AdapterView is ViewGroup, so how should i manage children)?
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Jun 16, 2010
I'm displaying an image on full screen now i want to zoom it in or out.
Any one guide on how I can implement multitouch image zooming?
I am using the 2.1 sdk version.
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Nov 17, 2010
I am developing an application,In my application i am display images using ImageView from url using xml parsing,i want to display zoom image,when i double touch on the Image,then again double touch on zoomImage,i want to reset image.How to implement in image using andorid..
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Jan 11, 2010
I have a Adapter View derived class (say GridLayout) in which I arrange views in a grid. When items in the grid exceed the height of the GridLayout( or screen) I want a scrollbar to appear. I have handled scrolling in onTouchEvent. But the problem is the scrollbars don't appear. I have set the vertical scrollbar to be enabled, but no use. The docs say the scrollbar appears every time the scrollTo or scrollBy methods are called.
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Oct 28, 2009
CursorAdapter is great, i'm a big fan. I notice that both newView() and bindView() are passed Cursors, indicating that extracting stuff from the Cursor and sticking it in the view should happen inside those overrides.
however in the source for CursorAdapter.getView() i see that bindView() gets called whether the view is recycled or not. in the new view case, this causes a redundant Cursor to View copy.
IMHO, CursorAdapter should call newView() if the view couldn't be recycled, or bindView() if it could.
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Oct 5, 2010
I have a ListView which is populated using a CursorAdapter. I'd also like to have some separators in my ListView. I have accomplished this with an ArrayAdapter, but I'm not sure how to accomplish this with a CursorAdapter. Are there any strategies for doing so? Or am I out of luck?
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Jul 15, 2010
I have a list and i want to check is the view is returned so i can call loadingAnimation.start() to make a imageview insite listview animate
Let me tell you what i mean.. code...
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Jun 9, 2010
I have table with 3 columns which is binded to an XML document with three text views.
CODE:........
Depending on the value store in the third column, I have to decide whether i should display this row or not
How should, I go about with this.
This is what I have so far :
CODE:...............
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Jul 12, 2010
I am calling one webservice.Result of webservice I am storing in an Array list. Result of webservice I want to display as list view. For ListView I am using SimpleAdapter. and SimpleAdapter is something like this:- SimpleAdapter adapter = new SimpleAdapter(this,hashmap, layout, from, to);
I am not able to put array list into hashmap. Is there anyway to do this?
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