Android :: Adding Item To View Programatically?

Nov 8, 2010

I am trying to find out how I can add an item (from xml drawable/workaround_item.xml) in a LinearLayout that is vertically aligned.

CODE:.........

At the beggining I was trying to use a ListView but as far I as know there is a bug using listview inside a scrollview. I was doing this because i have more components on the view that should be scrolled together with the list view. So I decided to remove the listview and implement a simple linear layout where i will be adding each element bellow other and so on.

The layout for the activity is as folow (layout/workaround.xml) and i would like to start adding the elements below the top bar.

CODE:........

Thats my java code:

CODE:......

Thats the result i am getting: http://twitpic.com/3562yu

Does android allow us to do this? If so, Hoe can I add the elements and set their values? (this layout will be dispalying results of soccer games).

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Android :: Manually / Programatically Scroll To A Specific Item In Gallery?

Apr 9, 2010

I am currently using a modified Gallery widget to display real-time events coverflow-style. What I now need is some Method to scroll to a specific item within the Gallery. Such method IS available within frameworks/base/core/java/android/ widget/Gallery.java as scrollToChild but is declared as private. Do you know of any manual way to move/scroll around a Gallery / List Widget?

Current workaround would be to inject DPAD_RIGHT using the Instrumentation Framework, which is as really ugly solution.

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Android :: Click In List View Item Changes Status Of Elements Inside Item?

Apr 9, 2010

I don't know exactly how to explain this problem, but I'll try. I have a ListView with several items. Each item has inside a TextView and two ImageView. I want the ImageView change when I click on them, and I want to open a context menu when I press for a long time into the ListView item.For the ImageView, everything works properly. For the whole item, I can show the context menu after a long press, but my problem is that the ImageView changes as well when I am pressing the TextView, for example.I hope you understand my problem. I think that all the children of a view are affected by an event in the parent, but I am not sure.

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Android :: Adding Menu Item To App

Sep 21, 2010

Is it possible to have something similar like Blackberry in Android: link text. I want to add a menu item particularly to the Contacts Option menu.please let me know if this can be done in android.

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Android :: Adding Menu Item To Calendar App

Aug 12, 2010

Is it possible to add a menu item to the default calendar app for Android? if so, how do i go about doing this?

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Android :: Set A New View's Margins Programatically

Sep 4, 2010

I have a FrameView that's created in my XML layout, and in my code, I'm trying to create a series of new ImageViews and add them as children of this FrameView. The ImageViews are small, only about 15 pixels square, and I want them to show up in various positions around the FrameView (I'm trying to implement what looks like a radar screen). I'm able to create them and add them just fine, and they show up on the screen.

However, when I try to set their margins, it doesn't seem to have any effect. No matter what I set, all the ImageViews show up in the top left corner of the FrameView, as opposed to offset by the appropriate margins. My XML layout is listed below, along with the code that generates the child views. Am I doing something wrong? How can I get the margins to show up properly? Or is there a better way to do this than by using margins.

XML:

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

Java:

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

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Android :: Adding Item To Global Context Menu

Feb 18, 2009

When you long press on something in Android, a context menu comes up.I want to add something to this context menu for all TextViews in the system.For example, the system does this with Copy and Paste. I would want to add my own, and have it appear in every application.

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Android :: Adding View To Bottom Of Layout Inside Scroll View

Mar 10, 2010

So my layout looks basically like this:
<ScrollView>
<RelativeLayout>
<BunchOfViews/>
<ImageView android:layout_alignParentBottom="true"/>
</RelativeLayout>
</ScrollView>
I have the ScrollView so all of the layout always is visible no matter the height of the screen. The problem is that on a very high screen, I still want my imageview to be at the bottom. However, a child of a ScrollView dont seem to have a defined bottom. The View is placed at the top of the layout. How can I solve this problem in a neat way?

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Android :: Adding Child View At Particular Location In Parent View

Mar 20, 2010

I need to draw a child view containing a rectangle and button on top of the content view at particular location on the parent (content view). How can I do this? Did not find an explicit way to set origin of child view?

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Android :: How To Programatically Refresh Gallery View?

Sep 17, 2010

I want to programatically refresh Gallery every time I download a video from my application. It doesn't automatically show up in the gallery.

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Android :: Programatically Layout A Button View?

Oct 28, 2010

I am trying to programatically define my program layout and add a button to it at a certain position. I am not using the layout xml as the content view.I have then added a button that I want to apply the properties

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Android :: Setup Unique Id To View Programatically?

Oct 28, 2010

I have checked setId() method of the view, it accepts integer parameter. But there are possibilities of assigning same id to different views, which may create problem for me while i do findViewbyId().

My question is "How to set unique id to the view programatically?"

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Android :: Block List View Item

May 21, 2009

I have the list view which is having 10 Items. I want to block few items (Disable). How do i do this? Can any one help me?

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Android :: How To Run The Focus Item On The View Without Using Onclick

Jul 20, 2009

If I want to execute the focused item on the view, I need to select focused item and press enter. Now I want to find another way to execute it without using click action. Does everyone know the other way? Thank you very much.

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Android :: Adding Menu Item To Any Text Box Menu

Sep 10, 2010

Is it possible to add a custom menu item to the long-press menu that opens in any text box?

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Android :: List Item View With Text And Image

Dec 10, 2009

I'm developing an application which has an listview. I'm currently creating the list item view dynamically from code (linearlayout, which includes 2 textviews and 1 imageview), but i'd like to use an XML resource for this. I read it is resource intensive when getting this view using findViewById within a loop. I thought of using a custom adapter for this, but am not sure on how to include lazy loading of the image then.

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Android :: Change The First Visible Item In A List View

Jan 11, 2010

How can I change the first visible item in a list view (I searched a method such as setFirstVisiblePosition) ?

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Android :: Want To Display Checked Item Of List View

Feb 13, 2010

I have a list view having several items and it is multichoice list. I want to display the checked item of list view. how i can do this.can anyone help me?

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Android :: Best Way To Create A Custom View For Every List Item?

Nov 4, 2010

As I am reviewing and prototyping my android project, I noticed that there is a view that has a list of items that are very customized. I have figured out most of my tools that I plan to use but I need some advice.

I have a list of items which can contain photos, some text to the right, an image to the bottom and more text below that. Very confusing I know. Each of these might be present for an item. The only thing that will always be there is the title.

So my question - what is the best way to create each custom list item view? I am thinking I have to use this getView to create each view. But when creating each view, is it best to 1) create a view dynamically and adding an image, for example, if it exists, or 2) create an xml file with all possible elements and hide them depending on the item?

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Android :: Customize List View Item Spaces Between Them?

Apr 9, 2010

I want to customize list view item spaces between different items. We generally display list item with default space between them to get viewed in list.I want to customize the space difference between them so that more data can be displayed in the list within the display part at a time

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Android : How To Add OnClick Handler To View In List Item

Aug 12, 2010

I have a ListActivity where the list items are defined in another XML layout. The list item layout contains an ImageView, a CheckBox, a TextView and such.

What I want is to set an onClick listener to the CheckBox in each list item. That is easy enough. The trouble is I need that onClick handler to know which position in the list it is.

I'm attaching the listener to the CheckBox in getView after that convertView has been inflated. The getView method has a position parameter, but I cannot reference it in the onClick handler for my CheckBox. I understand why, but I don't know how to get around it. How do I accomplish this?

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Android :: Adding A Custom View Through XML

Apr 22, 2010

I was attempting to add a custom view in XML, but I kept getting force closes. It works fine when I just find the parent and use addView() so it isn't the code. I'm pretty sure I'm just getting the constructors wrong. Does anyone have any experience with this?

Here's what I've got:

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

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Android :: Adding Views To Another View

Oct 9, 2010

Is there a possibility to add a view or derivative (button, textview, imageview etc...) to another view without having to go through layouts?

I have a class called ScreenView, it derives from View (e.g. public class ScreenView extends View).
I wanted to display text into it, labels, images etc..

On an iPhone it's trivial, simply create my objects and use addSubview method ; you can embed any UI objects into another. Most UI toolkits work that way too.

Problem with layouts is that I haven't found an easy way to properly position a subview (say a text view) in a given location of the enclosing View. I want one to contain the other...

I was hoping I had missed something in the documentation (which is far from being intuitive that's for sure) and I could do something like myView.addView(subview). But it ain't so :)

As a side question, what is the closest to iPhone's UILabel in the Android world?
A UILabel can contain a text or a graphic. Right now I've been using TextView and ImageView but they aren't anywhere as flexible when it comes to layout as a UILabel

Edit: Making my View inherit from ViewGoup instead, let me add subview..
However, I want to draw in my view. I found that when ScreenView extends ViewGroup, the onDraw function is never called then.

Something like:

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

Would paint in yellow my view if ScreenView extends View ; but not if it extends ViewGroup.

How do you draw directly in the view then?

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Android :: List View On Item Click Listener Not Working

Sep 6, 2010

What Im trying to do is to create a list (using a list view) of items (which are views inflated from the same layout) what must be clickable. At first I thought that all I had to do was to add an onItemClickListener to the ListView so if the used clicked on any of the views that composed this Item the listener would react. Well, I was wrong. Ive tried a lot of things, including setting focus and focusontouchmode off for each of the views that compose the items view but it still doesnt work. Any tips here? Can I archive this result? Oh, also ... this list view is in a dialog and the listener is in the activity that builds the dialog.

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Android :: Change Backround Of View Embedded In ListView Item

Oct 22, 2009

I have a ListView backed by customized ArrayAdapter where each item has 2 LinearLayouts - one I call head, and the other one - body. The body is hidden (gone) until user clicks on the row at which time it slides out. The second click (on the head) will hide the body. However if user clicks on the body it brings another activity. All of this works just fine, here comes the problem.When user presses on body I want a visual indication of the action just the same way as regular list item will flicker an orange background when pressed. I'm not getting this by default since (my theory) the onPress event is intercepted by body's view and not processed by the list item.The first thing I tried was to execute body.setBackground('#ff00ff') (never mind the color) in onPress event. That didn't work since (I suspect) there's no repainting after the call. Then I dig a little bit more and decided to use <selector/>-based background. I defined body_background.xml in drawable folder and assigned that to the body's background property.

There I noticed that background will only change if the even is processed by the list. For example if I set <item android:state_selected="true" android:drawable="@drawable/selected"/> then when I press on the head - the background of both elements (head and body) will change, however when I press on body - nothing. So to summarize my question.how do I change background of the child element in the list item if I assign custom onClick handler to it?

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Android :: Implement List View With Checkbox , Each Item Should Be Associated With Images

May 20, 2010

I need to implement a list view with checkbox and each item should be associated with images.

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Android :: Remove Item From A List View / Reload It After Removal?

Mar 22, 2010

How to remove item from a list view? how to reload the list after removal?

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Android :: Not Allowing Horizontal Spacing Between Grid View Item

Jan 23, 2009

Not allowing horizontal spacing between grid view item, I am using following for grid view, I don't want horizontal space between grid view item. android:horizontalSpacing="0px"android:verticalSpacing="0px"

By using this there no vertical space between item. But the horizontal space remain there, how to eliminate this horizontal space between grid items.

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Android :: Adding Scrollbars In A Custom View

Mar 5, 2010

I am working on adding vertical and horizontal scrollbars in a custom drawn View. I have overridden the compute*ScrollOffset, compute*ScrollRange, etc methods and have enabled the scrollbars by called set*ScrollBarEnabled. However, I do not see the scrollbars in my View, even after a call to scrollBy, which according to the documentation calls awakenScrollbars (I assumed awakenScrollbars is not required as the scrollbars do not auto-fade - isScrollbarFadingEnabled returns false).

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Android :: Adding View On Runtime To ViewFlippers

Nov 23, 2010

I have defined two views ExampleView1, ExampleView2, ExampleView3 and ExampleView4 in resources. In my Activity I have an empty ViewFlipper. Based on doing some logic I want to add either ExampleView1 and ExampleView2 to the ViewFlipper and show the view. Later I want to add based on internal logic either ExampleView3 and ExampleView4. How do I do this?

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Android :: Refreshing LinearLayout After Adding View

Mar 18, 2010

I'm trying to add views dynamically to a linearlayout. I see through getChildCount() that the views are added to the layout, but even calling invalidate() on the layout doesn't give me the childs showed up.

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Android :: Reg - Error In Adding View To ViewGroup

Nov 25, 2009

I am trying to add a view to a viewgroup but I am getting the following error when I run the application

Error: E/AndroidRuntime( 570): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. Code: public class ExampleApp extends ViewGroup{

private LayoutParams mLAyoutParams; AlbumArtImageView mAlbumArtThumnail;

static final String TAG = "ExampleApp";......................

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Android :: Context Menu Title Get From Clicked List View Item

Sep 16, 2010

Trying to set ContextMenu title according to the ListView clicked item.The ListView contains Bookmarks list -> FAVICON + BOOKMARK TITLE @Override public void onCreate Context Menu (Context Menu menu, View v, ContextMenuInfo menuInfo) {super.onCreateContextMenu(menu, v, menuInfo); menu.add(0, EDIT_ID, 0, R.string.menu_edit); menu.add(0, DELETE_ID, 0, R.string .menu_delete); menu.add(0, SHARE_ID, 0, R.string.menu_share); AdapterView. Adapter ContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)menuInfo; View itemID = (info.targetView); menu.setHeaderTitle("bla" + itemID);when I run this code it shows the android.widget.RelativeLayout@423d2389 or whatever and if I change the itemID to String itemID = ((TextView) info.targetView).getText().toString(); I get force close on long click even though no errors are shown in Eclipse or when I run the app.I also want to get the favicon in the same way.

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Android :: Custom List View / Set On Item Selected Listener Not Working

Sep 2, 2010

I'm just beginning Android development, and I'm working to get a Custom list view with a checkbox working. I've created a base class that extends Activity, Created an Adapter and overrode the getView() method to add the checkbox to the list view. I'm assuming I need to do this because I need something equivalent to didSelectRowIndexAtPath from Obj C to update my model. Please let me know if there's an alternate way of doing this too Code...

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Android :: Changing Background Color On Selected List View Item

Apr 17, 2009

Im trying to change background color when an item is selected. Something like using a color selector, but actually it crashes. I've created a list_selector.xml inside /res/color/.<?xml version="1.0" encoding="UTF-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:state_focused="true" android:color ="@ color/ plain_yellow"/><item android:state_pressed="true" android:state_enabled="false" android:color ="@color /plain _yellow" /><item android:state_enabled="false" android:color="@color/ plain_yellow" /><item android: state_active="true" android:color="@color/ plain_yellow" /><item android:color="@android: color/ transparent" /></selector> plain_yellow is a color i've defined in /res/values. I've tried to assign that selector programatically and using the xml, but the app crashes. Am i doing something wrong?

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Android :: List Item View Order Changes When Scrolling Fast In ListView

Sep 2, 2010

I am new to android, and ended up (have to) ask a question here. Let's make it simple, I simply want to make my own TextView-like (MyView extends View), This is my code:

public class MyView extends View { private Paint mPaint;
private String mText; private Bitmap mBitmap1; private Bitmap mBitmap2;
public MyView(Context context) { super(context); initView(); }
public MyView(Context context, AttributeSet attrs) { super(context, attrs);
initView(); } private final void initView() { mPaint = new Paint(); }
public void setText(String text) { mText = text; }
@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int measuredWidth = measureWidth(widthMeasureSpec);
if (mBitmap1 == null) initBitmap1(measuredWidth);
int measuredHeight = measureHeight(heightMeasureSpec);
setMeasuredDimension(measuredWidth, measuredHeight);
}

private void initBitmap1(int measuredWidth) {
mBitmap1 = Bitmap.createBitmap(measuredWidth, Fonts.getHeight(), Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(mBitmap1 ); canvas.drawText(mText, 0, 0, mPaint);
} private void initBitmap2() {
mBitmap2 = Bitmap.createBitmap(30, Fonts.getHeight(), Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(mBitmap2); canvas.drawText(mText, 0, 0, mPaint);
} private int measureWidth(int widthMeasureSpec) {
int measuredWidth = 0; int specWidthMode = MeasureSpec.getMode(widthMeasureSpec);
int specWidthSize = MeasureSpec.getSize(widthMeasureSpec);

if (specWidthMode == MeasureSpec.EXACTLY) { measuredWidth = specWidthSize;
} else { measuredWidth = getWidth(); if (specWidthMode == MeasureSpec.AT_MOST) {
measuredWidth = Math.min(measuredWidth, specWidthSize);
} } return measuredWidth; }
private int measureHeight(int heightMeasureSpec) {
int measuredHeight = 0; int specHeightMode = MeasureSpec.getMode(heightMeasureSpec);
int specHeightSize = MeasureSpec.getSize(heightMeasureSpec);
if (specHeightMode == MeasureSpec.EXACTLY) { measuredHeight = specHeightSize;
} else { measuredHeight = 80; if (specHeightMode == MeasureSpec.AT_MOST) {
measuredHeight = Math.min(measuredHeight, specHeightSize);
} } return measuredHeight;
} @Override protected void onDraw(Canvas canvas) {
super.onDraw(canvas); canvas.drawBitmap(mBitmap1, getLeft(), 0, mPaint);
initBitmap2(); canvas.drawBitmap(mBitmap2, getLeft(), 30, mPaint);
} }
In my code, I populate some numbers of MyView (let's say 20) in a ListActivity. My question is why mBitmap1's order changes randomly while i scroll (up-down) fastly (if I scroll slowly, this problem not occur)? mBitmap2 stays where those should be.

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Android :: Can't Touch On Screen When Adding View In Arrayadapter

Apr 19, 2009

I want to add some views in each row of list view. When I add text view and image view in getView() of ArrayAdapter,it works. But after I add other kind of views (like Check Box and Image Button...), I can't select the list row touching down screen directly, I only can select by key down, up and ok.

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Android :: Adding Live Background To View / Like Twitter App

Sep 22, 2010

In the official Twitter Android app, the opening activity (the dashboard) and the Tweets tab activity have a live background/wallpaper (clouds moving, etc).How do you accomplish that?Is it as simple as setting your view's background to a live wallpaper drawable?And then adding

<uses-feature android:name="android.software.live_wallpaper" /> to your manifest?

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Android :: Dynamically Adding A View To Activity Layout

Aug 18, 2010

I have a custom view (an extension of a TextView) that I want to dynamically add to my Layout (don't want to include it in the main.xml file).

The book says to fetch the RelativeLayout using findViewById() in my java code then create a new instance of my custom view, then use addView on the RelativeLayout to add the new view.

I'm not getting any errors, but when I click my button to add the new view, nothing is happening (view isn't being added). Do I need to set additional properties on my custom view (layout width, layout height for example) in order for it to be shown?

Adding code

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

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Android :: HowTo Make List View Larger / More Than One Item Visible At Time ?

Jan 14, 2010

Does anyone know how to make a ListView object larger such that more than one Entry item is visible at the same moment ? Both parents are already set with "fill_parent" but the view continues to show one-and- a-half Entries.

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Android :: Adding GestureOverlayView To My SurfaceView Class - How To Add To View Hierarchy

Jul 30, 2010

I was informed in a later answer that I have to add the GestureOverlayView I create in code to my view hierarchy, and I am not 100% how to do that. Below is the original question for completeness.

I want my game to be able to recognize gestures. I have this nice SurfaceView class that I do an onDraw to draw my sprites, and I have a thread thats running it to call the onDraw etc .

This all works great.

I am trying to add the GestureOverlayView to this and it just isn't working. Finally hacked to where it doesn't crash but this is what i have

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

The onGesturePerformed is never called. Their example has the GestureOverlay in the xml, I am not using that, my activity is simple:

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

So I am at a bit of a loss of the missing piece of information here, it doesn't call the onGesturePerformed and the nice pretty yellow "you are drawing a gesture" never shows up.

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Android :: Get Event Of List View Field When Adding Checkbox In Listview

Apr 21, 2010

i have problem to get event of list view field when i am adding checkbox in listview. my problem is to get the status of check box form every row of the list view, either it is check or not, according to that i have to do operation.

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Android :: Adding View Extending From SurfaceView To Layout Gives Blank Screen

Jun 5, 2010

I'm very new to Android programming, so this is probably something pretty basic. I just have an xml layout with a few buttons. I'm trying to follow the model given by the JetBoy demo, so I'm adding a view to the layout which extends SurfaceView. When this new view is put in my xml layout, I just get a blank screen.

Here's the XML layout if it helps. The gameview element is what causes the screen to be blank

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

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Android :: Graphically Represent Multiple List Selections / Dynamically Change List Item View

Apr 23, 2010

I'm trying to create a multiple selection list where the selection is represented graphically rather than with checkboxes.My list has checkboxes, but I want them to serve a different purpose. I'm using a cursor to hold my data and created a custom view binder for the SimpleCursorAdapter. I did this for the checkboxes and general flexibility.So far I haven't even been able to show one line as being selected. I've enabled multiple selection on the list and denied the children of the list item focusability. I've tried manually changing background color with the position fed in through the list item click listener. But the wrong items get changed and they don't even change to the right color. I've enabled touch focusability with no improvement either.Ideally, I'd like the trackball highlight focus bar to appear in multiple places. But I don't think this is possible unless you use the drawable directly. But I don't know how to find or apply it. My next idea was to have a slim view bar that changes color. But I had the same problem with the wrong item being selected so I never finished trying to guess the index position to see if this would work. My most recent idea is to completely swap out the view for another one if it's selected. But I have no idea how to do this either. I'm thinking of using an array list to store the _id s of the items that need a different view to get around the wierd selection problem. I'm also thinking of passing in the ID field as my from and the selection view as the to for my adapter. Then I'd intercept it with my binder and change the view accordingly. But once again, I'm not sure how to do this successfuly.

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Android :: Set View In Right Place From Remove An Item In ListView (Android)

Sep 27, 2009

I choose an item to remove from my ListView. And after the Item was removed, my ListView was scrolled back and display at the first Item. I want my ListView display in right place where the Item I had removed (It like remove a contact in Android Contact list). How can I do that?

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