Android :: Drawing Focus Highlight In Custom Widget
Jul 6, 2009
I have made a custom widget, very similar to JTable in Swing. It is not editable, and all data is replaced at once, allowing easy checking for the widest item in each column & custom col sizing at replace time. It is a subclass of LinearLayout, filled with re-usable TableRow Objects, sub-classed directly from View.
TableRow is both Clickable, focusable, & focusable In Touch Mode. TableRow overrides onDraw(Canvas), calling super. It draws the first column in Black with Lt gray underneath. If the TableRow isFocused () , then a filled rectangle is drawn, before the rest of the cols (left or right justified based on data type), and borders. Where do I get the color, orange, to draw the filled rectangle indicating focus? android.R.drawable.list_selector_background seems to be a pointer, value 17301602, not an actual color. Placing any real Color in my code draws things fine. Is this 17301602 transparent or something? Am I doing this wrong, or do I just need to know how to fine the orange?
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Apr 15, 2009
I'm using an ExpandableListActivity and notice that whenever I select a group item (to expand or collapse it), it highlights briefly and then quickly un-highlights.
For my application, I want the group items to remain highlighted. I've tried requestFocus() and several other things but nothing is working.
Anyone know how to keep a selected group item (after expand or collapse) highlighted and focused?
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Feb 1, 2009
I've set the row (view) being used in a ListView as non-focusable along with non-clickable and have set the listview's focusable flag to false as well. However, I still get the yellow highlight when I use the scroll-ball on my device. How can I disable the yellow highlight and use my own special view/color instead upon focus?
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Apr 29, 2010
I have an app widget which runs neatly. However, I am unable to highlight a click on a linked item. I've seen it in the standard app widgets like 'Music' and 'Power Control', for instance. Moreover, I've also been studying the Music app widget's source at album_appwidget.xml. The only thing I could think of is the LinearLayout defined at lines 23-35 which states android:clickable="true".Unfortunately, this does not work for me. So does anyone have a hint on how to highlight a click on an app widget? I've tried the LinearLayout, TextView and Button. None of them displayed a border as a highlight.
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Sep 10, 2010
I want to use a Button in my android app but I want to customize how it looks. However, I want the highlight and selected colors of the button to be the same as the default colors (i.e. the dark and light orange gradients, or whatever the theme color supplies).Is there anyway to get the default highlight/selected drawables and to use that as the fill for my buttons on the selected and highlighted states?
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Sep 25, 2009
Is there a way to highlight the widget in the android home screen by using DPAD, and on selecting the widget using the keypad, launches the app for the widget. Where do I make change in Launcher.java or workspace.java??
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Jul 13, 2009
I have an expandable list with a custom adapter. Everything works great but there are two problems.
First whenever a group or child has a custom background color set the orange selector does not show up. If I dont setup a color the selector draws nicely and also the fade away for context menus works.
Second, some of my text inside a list item is linkified. Whenever a link is present the selector does not draw again. It seems that the click event is handled by the internal link view instead of propagating to the list view.
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Jul 6, 2010
I have a few doubts about view flipper I am using viewflipper to go to another view using scroll_left animation. i have kept 2 linearlayouts inside the ViewFlipper Code...
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Sep 26, 2010
I'm trying to draw a custom border by drawing a custom view. Here is a sample of one side of the border: Code...
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Aug 10, 2010
I created a custom OverlayItem class so that I could essentially have one kind of OverlayItem whose Drawable marker would set itself depending on the state of some data that I pass into it. I have attempted to accomplish this by, on my first attempt, utilizing the setMarker method within the OverlayItem class. Once that did not work I attempt to override the getMarker method and have it return the appropriate marker to represent the data. Both of these attempts ended with nothing being drawn on the map...however if they are commented out the markers draw just fine (except they of course use the default marker, which isn't what I want). Here is my code for my custom OverlayItem class (the commented out methods I have tried and they have not worked):
private class MyOverlayItem extends OverlayItem {
private Context mContext; private MyData mData;
public MyOverlayItem(GeoPoint point, MyData data, Context context) {
super(point, data.getWhat(), data.getWhere()); this.mContext = context; this.mData = data;
/*if(data.getTemp() > 200) this.setMarker(res.getDrawable(R.drawable.icon_data_hot_l));
else if(data.getTemp() > 100) this.setMarker(res.getDrawable(R.drawable.icon_data_neutral_l));
else this.setMarker(res.getDrawable(R.drawable.icon_data_frozen_l));*/ }
/*@Override public Drawable getMarker(int stateBitset) {
Resources res = this.mContext.getResources(); if(this.mData.getTemp() > 200)
return res.getDrawable(R.drawable.icon_data_hot_l); else if(this.mData.getTemp() > 100)
return res.getDrawable(R.drawable.icon_data_neutral_l);
return res.getDrawable(R.drawable.icon_data_frozen_l);
}*/ }
Is there a way to do what I am attempting to do or do I need to make a unique OverlayItem class corresponding to each state of my data?
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Jun 23, 2009
I would like to draw custom images within a ListView, for this I have created a ListView and an ArrayAdapter object. I have specified that each element of the ListView will be an ImageView which is specified by an XML layout file. Now, I would like to draw a custom graphic in each cell depending upon certain paramters.
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Feb 9, 2010
I have a linear layout that I have overridden because I want to > dynamically add other views to it. I am trying to add some textviews > to it and I call addViewToLayout in the onLayout method. Can't you just add your views to the layout using addView()? I have one custom LinearLayout and this is what I do and it works fine. No need to override onLayout() or onDraw(). Maybe try that
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Apr 8, 2010
I am working on something that needed custom drag-and-drop functionality, so I have been subclassing View, doing a bunch of math in response to touch events, and then rendering everything manually through code on the canvas in onDraw. Now, the more functionality I add, the more the code is growing out of control and I find myself writing a ton more code than I would expect to write in a high level environment like Android.
Is this how it's done, or am I missing something? If I'm not doing anything fancy in the UI, the framework handles the majority of my interactions. Built-in controls handle the touches and drags, and my code is pretty much limited to business logic and data. Is there a way to leverage the power of some of the UI controls and things like animations while also doing some of it manually in the onDraw canvas? Is there an accepted standard of when to use one or the other (if indeed the two approaches can be mixed)?
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Jul 19, 2010
I am drawing text in my custom view in android using canvas.drawtext. i need to change back color, and want text right aligned. for example i want to print the text in a 10, 10, 100, 20 rectangle of color yellow and text color red and right aligned. how can i do that ?
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Oct 1, 2010
do you know if it is possible to keep focus in a widget even if other widgets that are partially visible or not visible at all changes its height size?I wouldn't like to have my screen jump vertically in front of the user because some other widget updated itself to accommodate more data.
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Aug 27, 2009
I have made custom view for autocompletetextview, but when I am trying to select any entry from that dropdown using touch or dpad, it is not showing any focus on it, so what can be problem in that?
My code is as under.
Custom view adapter code regarding to UI:
CODE:.....................
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Aug 26, 2010
I'm trying to realize how the focus and selection in the Gallery widget is doing their job. I'm facing weird situations when trying to update information (TextViews and Spinner) upon a selected item in the Gallery. The focus and selection is lost. So, using the resource gallery_item_background will end in showing the "unselected" background for the current selected image. I have used the .xml that came with the android sdk, and I can't realize how this is happening. I have set setFocusable(false) and setFocusableInTouchMode(false) to all other Views to try out (and true for the Gallery) without any luck.
I have also add 'in-situ' debug, that is, a menu that updates differents widgets when onItemSelected() is called. So I can see while using the application how the background resource is applied. When set to 'no update' the obvious thing happens. None of the widgets are updated with new values, and the background resource works as expected. When set to 'manual update' (an update in the listener that do: .setText() on the textview) does work depending the current View that is showing the TextViews (I have a ViewFlipper that display 2 differents Layout of the TextViews)...............
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Jun 18, 2010
I am trying to create custom background selector for my ExpandableListView. It works fine for all states other than focused. I am unable to identify which row is currently focused. Here is the code...
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Nov 10, 2009
I'm writing a appwidget and hope to limit a widget can be added only once on homescreen, and for further trying, i hope to show the correct page of homescreen to show the widget, just like native media player widget.
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Aug 13, 2010
What's the best way to detect when a Home Screen Widget has gained or lost focus? An example of losing focus is if the user navigates to another screen or if another screen popped up in front of the Widget.
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Aug 29, 2010
I loved the camera on the Eris and the Incredible, not only did they have a whole lot more of a crisp high-res detail, the auto-focus absolutely rocked. With my droid x, I can be getting a little artsy and focus on an object with the crosshair but it'll take me 20 tries to get it to lock on, its insane, I know I'm not getting too close to my subject because it will definitely eventually focus on that object if I try over and over and over again. It's not just close ups that I find myself and my buddy with this issue either. macro shooting mode does not help. My buddie's droid X has the same exact behaviors. Eris and incredible just LOCKED ON first try with even very low contrast / detail subjects, on top of that, have a ton better camera GUI when it comes to "click to focus". I know this thing ain't no SLR but, blows me away of how terrible the camera performance is vs. the HTC android based devices. Ihink motorola will fix this? I know this thing ain't no SLR but it just blows me away how the HTC android devices camera performance (except for video) blows the Droid X away.
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Apr 14, 2010
I have an XML file in my layout folder that has how i want my custom widget/view (not sure what correct terminology is here).but how do i make it so that i can programatically, add one or more to an activity
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Nov 19, 2010
Can I use a custom view like com.examples.me.customview in the xml file of a app widget and can then draw in the onDraw of the custom view? Or do I have to draw into the drawing cache of an ImageView instead?
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Aug 2, 2010
i made a extended a View, overwrote the 3 View Contructors and tried to insert it on my xml of a widget.is it possible to use custom views in Widgets?
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Oct 1, 2010
I am writing a clock widget that uses customised bitmaps (so the widget loads the bitmap from the sdcard) Just have a couple of questions regarding how updates work:
1. if i want to display seconds on the clock widget will the widget load the bitmaps off the disk every second or can they be cached somehow so it doesn't reload off the disk each time. or If it does reload a bitmap each second, would this use a lot of power?
2. If i load the customised number bitmaps into a static array and then pass them as bitmaps to the widget would this use less power than just loading off the SD card?
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Oct 28, 2010
I'm attempting to use a custom Android vertical scrollbar widget that seems to work fine in its own example project, but I am having trouble trying to include it into my project. I've exported a .jar from it to use in my project, but it seems to be a minefield of problems, from duplicate resources, to my XML layouts not able to get at styles inside the library, and errors "inflating class" when reading my XML layout file.How should I go about using the widget from another project in my own?Quite new to Java development (know the language, but not much of the overarching project/package management), so if there's some good text regarding that it would be appreciated.
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Mar 11, 2010
I'm writing an app that will host widgets. The app has custom view (which probably is the source of issue).mView.addWidget() basically just remembers this AppWidgetHostView instance and then mView draws it directly onto canvas. Visually everything is fine.I can see the actual widget. But the issue is with reacting on UI events. Please advise what needs to be done in the parent view in order to correctly trigger handlers in the widgets like onClick().I used standard widgets which normally react on click events. None worked.I also created my own test widget with listener and onClick()is successfully triggered if the widget is added on Homescreen, but doesn't work in my app.mView correctly detects click event and I tried to call widget.perform Click there, which returns false meaning onClickListener is not registered in the widget. But according to source .would call updateAppWidget which would register its onClick listener.
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Dec 3, 2009
instead of referring the custom widget by a fully qualified class name, is it possible to map with a shorter name. Like it happens in ant custom tasks (though properties file).
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Apr 25, 2009
I am trying to add a button to a custom imageview. I have created a custom view to display an image to the screen, now i wanted to add a custom button on this veiw and display a layout in onClick. The following is my custom view.
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Nov 12, 2009
I created a multiline textview widget which handles ellipsizing - is it appropriate to post it here in this forum for feedback, or is there an android site dedicated for custom widgets in the community?
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