Android :: Implement Touch Events On Activity And Button On Droid?
Apr 23, 2010
I have an Android activity with an ImageButton. I would like to execute some logic when the button is clicked and show a different image for the pressed state, but also receive the touch event on the activity.
By default only the button receives the touch event. If I set the clickable attribute of the button to false then only the activity receives the touch event.
What's the best way to implement the touch event in the activity and the click in the button?
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Jul 21, 2010
I'm trying to figure out a way to send touch events to the foreground activity. Essentially I want to write something that allows me to run it from the shell and just say "I touched this co-ordinate", so that I can automate some UI tasks for testing. Essentially what Monkey does, but application agnostic.
I think that android.view.MotionEvent holds the key, but I'm not sure how to run something without view so that I don't interfere with what is on the screen. Perhaps with a service, but I'm unclear how that would work.
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Jul 19, 2010
New to android so please bare with me here
Is it possible to detect all touch events in an Activity and capture it and then in return pass that pass event to another View. For example:
Button 1 and Button 2. When Button 1 is pressed I want to capture that touch/click event and automatically pass that touch event to Button 2, basically with one touch/press you get the click generated and that same click is passed on to the second button automatically.
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Jan 28, 2010
I want to place a common banner and menu on each Activity with footer too.
Can anyone guide me how can I implement master and child page like asp.net in Android?
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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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May 31, 2009
I am writing a game using OPENGL, there are several 3D objects in my surface view. My question is: Should each 3D object implement view in order to get touch events? Or there is other way to do this?
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Sep 23, 2010
I need to implement the Image zoom in and zoom out functionality using the finger touch,like we have it in Android phone Image gallery, Please let me know how can i do this in my app.Does any had done this before.
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Apr 27, 2009
I'm developing a game for Android. It's got a lot going on but is running reasonably smoothly. That is, of course, until the user touches the screen.While they're touching it, onTouchEvent is called (with action = ACTION_MOVE, x = 0 and y = 0) roughly once every ten milliseconds at what appears to be a fairly high priority, as it absolutely obliterates the framerate. As soon as the touch ends the framerate returns to its nice state.Has anyone encountered this? Is there a way to reduce the rate at which ACTION_MOVE events are generated, or to ensure that they're only generated when there is actual movement, or use a polling method that just gets the current location of the touch? Or even just a way to disable it entirely?
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Feb 26, 2010
I'm writing an Android game that needs to receive touch events. My problem is that, whenever the user drags their finger along the screen, so many touch events get sent to the touch event handler (which I think runs as a separate thread) that my frame rate plummets! What's the best way I can limit the number of touch events that are handled per second? For example, if my game runs at 60 fps, I really shouldn't need more than 1 touch event being handled every second. Can I do this is a way that doesn't lose any information (i.e. important information about where on the screen the user touched last)?
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Sep 8, 2010
I start monkey like this:
monkey -p <MY PACKAGE> --port 4321
(I have already done a tcp port forwarding).
I then use PuTTY to telnet to 127.0.0.1:4321
I can issue a command like tap 100 100 I get a response OK but I see nothing happening on the UI. I have placed a button at that location but I does not receive the touch event.
When I run monkey like this
monkey -p <MY PACKAGE> --pct-touch 100 -v 10
I see touch events being dispatched to the screen.
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Jul 21, 2010
Wondering here if there is a way I could trigger an event, so that any library listening for these events (e.g. jQTouch, Sencha touch, iUI, ... ).
If I could extend or use jQuery for such task e.g. $(...).trigger('event') that would be great to know.
Usage example:
I need to debug a few web apps by simulating multi touch with my mouse. This seems a little complicated, so if I could trigger the multi-touch events using Javascript I could therefore test the app more efficiently.
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Sep 24, 2010
Purpose of the app:
A simple app that draws a circle for every touch recognised on the screen and follows the touch events. On a 'high pressure reading' getPressure (int pointerIndex) the colour of the circle will change and the radius will increase. Additionally the touch ID with getPointerId (int pointerIndex), x- and y-coordinates and pressure are shown next to the finger touch.
Following a code snipplet of the important part (please forgive me it is not the nicest code ;) I know)
CODE:.............
The problem:
A HTC Desire running Android 2.1 is the test platform. The app works fine and tracks two finger without a problem. But it seems that the two touch points interfere with each other when they get t0o close -- it looks like they circles 'snap'to a shared x and y axle. Sometimes they even swap the input coordinates of the other touch event. Another problem is that even though getPressure (int pointerIndex) refers to an PointerID both touch event have the same pressure reading.
As this is all a bit abstract, find a video here: http://www.youtube.com/watch?v=bFxjFexrclU
My question:
Is my code just simply wrong? Does Android 2.1 not handle the touch events well enough get things mixed up?Is this a hardware problem and has nothing to do with 1) and 2)?
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Oct 4, 2010
How do you disable all touch events in an Android WebView (or scrolling in particular)? I would like the activity to handle all touch events.
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Aug 10, 2009
Just wondering if there is an easier way to simply stop ScrollView from being scrolled via touch inputs? I will programmatically get the ScrollView to scroll to top or bottom.
As a last resort, I guess I will have to inherit from ScrollView and capture all the ontouch events. But wondering if there is an easier way before I take this approach?
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Mar 5, 2009
I have a list activity that creates a header row above the data rows from the adapter. I want to receive click events when the user selects the header or a data row (but my data rows have check boxes in them, so this part is tricky). When I use the touch screen, I get this expected behavior:
1. Tapping on any row causes a click event and a dialog appears.
2. Long-pressing on a data row causes a context menu to appear.
3. Long-pressing on the header row does *not* show the context menu.
However, when I use the arrow keys (emulator) or trackball (G1), I get this unexpected behavior:
1. Selecting any row fails to cause any click events, even though the row's appearance changes like it's being clicked.
2. Long-pressing on the header row *does* show the context menu, which I don't want.
3. Occasionally, it doesn't focus the correct row when I move up or down (e.g. it skips from the header to the last data row).
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Jul 16, 2010
I'm developing an HTML/Javascript mobile web application using Dashcode. Normally I wouldn't use such WYSIWYG stuff, but I've found it a very rapid development process.
Unfortunately it seems like I can't get it to run on Android's browser currently. The main display loads and all the correct data is pulled from web services, but you cannot press on anything to activate it.
I suspect that the android browser is sending different javascript events, which the Dashcode objects are not configured to pick up.
In addition, the adb logcat debugger refuses to output any log messages from the browser on the emulator, and as such I'm having a very hard time sorting this out.
What events I need to be watching for, so I can iterate over all the touch handlers and duplicate them for the android events, or offer help in any other way on this situation?
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Jan 20, 2010
I have an activity defined as:
CODE:...................
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Sep 8, 2010
I have a custom Android view which overrides onTouchEvent(MotionEvent) to handle horizontal scrolling of content within the view. However, when the ScrollView in which this is contained scrolls vertically, the custom view stops receiving touch events. Ideally what I want is for the custom view to continue receiving events so it can handle its own horizontal scrolling, while the containing view hierarchy deals with vertical scrolling.
Is there any way to continue receiving those motion events on scroll? If not, is there any other way to get the touch events I need?
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Jul 4, 2012
My phones' display has been broken and I would like to know if there is a pc software that allows me to simulate touch events via adb bridge.
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Jan 17, 2010
I am just getting started with Android development and I have created a nice little widget that displays some info on my home screen. However, I now want to implement a Button on my widget that updates the info in my widget TextView.
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May 6, 2009
I try to create a widget and I am now wondering how to be able to put a button on my widget and set its "onClickListener". It seems that we are limited to the RemoteViews... OK I can deal with that (but this is a limitat to me) but I'd like to add a button where the user can request an update on the data displayed in the widget. (I get some info on the web but the user only needs to request an update, I can't defined an automatique update, it's useless for my app) I'm sure we can do that since there is an example with a player and obviously with a PLAY/PAUSE button. I was looking for in the remoteViews API btu without finding anything.
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Nov 24, 2010
I want to implement back button functionality in my Android Application similar to the back button in the Browser but without using Intents.
I m going to view a sport listview, in that i click football listview , in that i click my favorite player listview, suppose if the user press back button in football listview then i have to diaplay sport listview.
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Sep 9, 2009
How can you implement a RadioButtonPreference in android? Just like the CheckBoxPreference. Are there any workarounds?
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Sep 14, 2010
Official android dev website says that:You can implement your tab content in one of two ways: use the tabs to swap Views within the same Activity,.....http://developer.android.com/resources/tutorials/views/hello-tabwidget.html
I just wanna use tabs to swap views, no more than one activity. is there any sample code?
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Sep 3, 2010
Im trying to implement an activity that uses ExpandableListView and I have gotten so far but now I have found some strange behavior.
My activity is meant to record food intake as specified by the user. they have a choice of menus (breakfast, lunch and dinner - the outer group) which expand to show their contents.
when a user clicks on an inner menu item a dialog appears asking them for the qty. once they enter a qty and dismiss the dialog the text on the menu item changes to reflect the quantity of that item that has been consumed
The above image shows the list in a closed state.
Below is the list after I have opened the lunch menu and clicked on 'Potato Chips' and indicating a Quantity of 1. As you can see the 'Potato' itemtext has now been changed to reflect the Qty of 1.
The strange part happens now. if I click on 'Lunch' and close the list and then click on it again re-opening it, the 'Qty X 1' text has jumped to another item (Milk)
Each time I open and close the list it jumps back and forth between the two items. Also if I open up other items, such as breakfast, I find that they too have now gotten items with 'Qty X 1' even though I havent clicked them.
The bits of code that are relevant are as such:
The XML for a child element:
CODE:................
The code thats triggered on clicking a child element:
CODE:..................
The above code opens a dialog, accepts a value for quantity, appends the list element to reflect this, also saves to database and sets a textview with the selected item and quantity.
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Aug 16, 2010
So I have the Droid X but I noticed that the Droid 2 now has a themed version of Swype to fit in with the rest of the UI. I like it a lot.
My question is this. When you push the voice-to-text button does it pop up a window like earlier versions of Swype or does it do the really fast and slick thing that the multi touch keyboard does (just replace the keyboard with the audio waveform thing).
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Nov 24, 2010
In my android app development, I have one button, the button text is not a single color text, it is two lines text, with each line uses different color for line text. How to implement this? "Two lines" can be simply implemented by adding " " in the text, I don know how to set different colors for each line text on the button. Anyone can help?
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Feb 15, 2010
I'm working on my first Android app, and would appreciate any guidance to make sure I'm doing this the best way. Basically I want an Activity to list recipes. Eventually I'll have another Activity to display an individual recipe selected from the list, but I'm not worrying about that yet.
The list of recipes should show each recipe's title, description, rating, and date added. For each recipe in the list I'd like the title on the top left of the list entry, rating on the top right, description on the bottom left, and date added on the bottom right. I may want to add photo, icons representing properties of the recipe (e.g. vegetarian), etc. The makes me think that each item in the list should be a TableLayout.
With all that in mind, here's what I'm planning to write:
1. Write class RecipesDataAdapter extends BaseAdapter. Override the getView() method to return an instance of TableLayout. Populate each instance of TableLayout with two TableRows, the first row containing cells for title and rating, and the second row containing cells for description and date added. For now I'll just pass the Recipe instances to the adapter in an array.
2. Write class ListRecipesActivity that extends ListActivity. Override the onCreate() method to obtain instances of the Recipe class and call the setListAdapter() method with an instance of the RecipesDataAdapter class.
Notice that all this is done in code without any layout XML files. All the examples of Activities that I've seen use a layout XML file and call setContentView(R.layout.layout_name) but I'm not sure if I need to do that for this, or even how I would do that considering my main Activity is a list of non-trivial things (TableLayout).
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Sep 28, 2010
Is there any event triggered on an activity when I call startActivity("activity_id", myIntent);
If the Activity exists already. I pass a parameter to the activity via i.putExtra("someID", someSerializableObject ); and would like to call a method to refresh a WebView. Right now, the call on startActivity brings the activity in the foreground but the webview does not display what i want.
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Mar 17, 2010
On iPhone, iPod touch and (presumably) iPad, Apple has multi-touch event handling available via JavaScript in Mobile Safari. I know the Nexus One recently added multi-touch support via an update, and I believe webOS is also multi-touch enabled. Do Android 2.1 and/or webOS have access to multi-touch in the browser, or is this currently exclusive to Apple devices?
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