Android :: Maximum Number Of Multitouch Events
Apr 29, 2010
I am attempting to write an application which will require the user to press, at maximum, four "buttons" (ie regions of the screen) at any one time. I have been looking at the multitouch capabilities of the SDK versions > 5, the MotionEvent.getPointerCount() appears to return the number of presses detected on the screen. *What is the maximum number of presses this function will ever return?*
I went digging through the android source code for the MotionEvent class, and couldn't deduce anything from that, I am wondering if the maximum number of presses is heavily hardware dependent? I modified the MultiTouchVis code by Robert Green (from Battery Powered Games) to report the number of presses reported by MotionEvent.getPointerCount() each frame and on my Milestone it consistently reports a maximum of 2 presses. Is this a hardware thing, or does the sdk limit it to 2 presses?
Is there any way to register more than 2 presses at a time? I'm making a musical application and would like the user, for example, to be able to play chords by pressing multiple keys at any one time.
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May 13, 2010
Can multitouch events be tested on Android Emulator ? Or is there any way to test this without actual device ? I am using 2.0 sdk and want to test zoom-in zoom-out on by two fingers.
Is there a way out ?
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Jan 6, 2010
I have been racking my brain to try to figure out what is going wrong here. I wanted to experiment with multi-touch, so I decided to add the controls for LunarLander to the touchscreen.
Instead of adding buttons, I defined regions on the screen that when touched, would act like the buttons on the keyboard (for example, the gas fires as long as you press the screen in the area defined for the gas button, and stops firing when you release.)
To do this, I added the onTouchEvent override to the LunarView class as follows:
CODE:.....................
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Jul 29, 2009
I've written an application which involves a lot of simultaneous connections to different servers. I've noticed some big stability issues with this as sometimes the program crashes totally (not just ANR, but a segfault type thing). What's the recommended number of maximum simultaneous connections for speed and stability?
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Nov 3, 2010
Is there a way for setting a number of maximum visible rows for a listview?
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Dec 20, 2009
What is the maximum number of threads allowed per application?
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Nov 12, 2009
I want to change the max number of items in the OptionsMenu (3 visible options and More option available). Is that possible?
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Oct 8, 2010
Is there a maximum number of apps that can be installed on the Epic as long as you do not exceed the memory ?
Will the "app" icon show ALL the apps, no matter how many there are ?
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Apr 9, 2010
Just tried to install swype and when I login to the swype installer I get "You have installed Swype Beta the maximum number of times." I am going to email them and see if I can get my account reset or not but if not that sucks. Edit I posted this in the root forum because no stock would be installing this over and over.
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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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Aug 12, 2010
I would like to forward all calls to my number on to the new predefined number automatically. Is it possible to forward incoming call? Probably it is possible for Froyo at least. I found application called Easy Call Forwarding. But many people reckon it dosen't work actually. We can notice forwarded call by onCallForwardingIndicatorChanged() from PhoneStateListener but I have no idea how to set forwarding mode.
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Dec 16, 2009
Google Voice Blog: Upgrade to a Google Number
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Jan 13, 2014
My son decided to lock his tablet with a random number he plucked from the universe! one that he can't remember! I'm pretty sure it's a MID here is the link to where I got it from. 8G 7" Android Tablet 4.1 Dual Cam Keyboard Case | Trade Me. I have tried all the different power volume button combos that were suggested on web, also have tried downloading the program to my pc to share info with the tablet, but the information sharing must not be turned on in the tablet, as when the device showed up in my computer it was empty! Where I purchased it from will send me a Getroot, but I have to pay and I'm not sure if this will even work!
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Nov 19, 2010
I'm developing an application that must handle multitouch. Basically I want single touch for rotating ( this is no problem ). And multitouch for scrolling.
I have the basic code in, but I'm having problems when the shift from single to multitouch, and vice verca, occur. Basically the movement will jolt because the median position of the multitouch ( two fingers ) and the absolute position of the single finger are at a distance. So if I have two fingers on the screen, they make up a median position, and then lift one finger, it would be like a quick movement from that median position to the absolute single finger position. This will be the movement that I don't want.
This is my code:
CODE:........
The onTouchDown function of the camera just sets the first value of the touch move. That's why I also use it in the up movement to set a new begin value for the single touch movement when coming from a multitouch.
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Mar 1, 2010
it should not zoom in too much (x < minZoomLevel etc) or zoom out too much (only one size - width or height - can get smaller than the display size)
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Sep 22, 2010
I'm trying to do is draw circles around two points that are being touched, and as the fingers drag along on the screen, have these circles follow each finger.
However, I'm getting some weird behavior that I can't figure out. So when I place two fingers on the screen I get my circles no problem. When I drag around with the two fingers everything works like I want it. However, if I lift the first finger, everything stops redrawing, and the second finger that is still on the screen stops being tracked. If I place the first finger back on, everything behaves good again. I figure I must be handling the two fingers poorly.
Also, if I have two fingers on the screen, and I lift and touch the second finger, everything behaves well. It's only in the case where I have two fingers and I lift the first one do I see a problem.
CODE:........................
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Sep 6, 2010
it is opening phone contacts and when i choose one contact i can get all detail of the contact but not getting the number type of numbers; more specific >> if the user have four numbers, i can get all number but not getting number type of these numbers i.e. HOME,WORK,MOBILE)
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Jan 10, 2010
I know that there are browsers like dolphin or xscope that allow multitouch zoom, but I was wondering about something else. I actually happen to like the default browser better than those two, I really just want multitouch. I'm no developer, but I was wondering how possible it would be to take the default browser, and add nothing to it but the multitouch zoom.
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Mar 23, 2010
How we can find whether Multitouch support is available or not in various device?
I tried like this:
CODE:............
How we can use that.
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Feb 17, 2010
I'm seeing a bug with overlays on MapView with the Nexus One. Pinch and zoom multitouch gestures don't scale my overlays until the user releases the gesture, at which point the overlay redraws itself. In contrast, the My Location overlay in Google Maps WILL scale during the gesture. Is there a way to fix this in my app, or is this a MapView bug?
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Feb 6, 2010
I have a user complaining about a FC on my app and they were kind enough to post the stacktrace. It's a class that I cannot find anywhere and it sounds like it is related to multi-touch. I don't specifically call this class, MapView does so I don't have any control over it. It kind of looks like his Google API maps package is trying to use an unknown gesture library. Any ideas? I figure other devs using the MapView class might run into the same issue with their users. The user is using a Droid.
02-06 01:08:37.326: ERROR/AndroidRuntime(4231): Caused by: java.lang.reflect.InvocationTargetException 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at com.google.android.maps.MapView.<init>(MapView.java:238) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at java.lang.reflect.Constructor.constructNative(Native Method) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at java.lang.reflect.Constructor.newInstance(Constructor.java:446) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at android.view.LayoutInflater.createView(LayoutInflater.java:500) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): ... 22 more 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): Caused by: java.lang.NoClassDefFoundError: android.view.ScaleGestureDetector 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at com.google.android.maps.MapView.setup(MapView.java:368) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at com.google.android.maps.MapActivity.setupMapView(MapActivity.java:187) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at com.google.android.maps.MapView.<init>(MapView.java:280) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): at com.google.android.maps.MapView.<init>(MapView.java:255) 02-06 01:08:37.326: ERROR/AndroidRuntime(4231): ... 26 more......
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Dec 19, 2009
Is multitouch available to Android app developers? I've heard its on the new 2.0 version but only seen it accomplished on the Internet browser.
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Nov 2, 2009
I had assumed that the Motorola Droid supports the new multitouch APIs in Android 2.0, but the reviews of the device I've seen so far say that it isn't used, at least in the built-in apps like the browser (e.g: http://www.engadget.com/2009/10/30/motorola-droid-review/ ). Apparently though, it is supported on the upcoming GSM version of the same handset [url], so perhaps it is just an issue of whether the driver is included on the Droid version of the software. Can anyone with access to a Droid confirm whether the multitouch API works on it?
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Jul 18, 2009
I need to zoom-in/zoom-out for my app. Multitouch would be the most obvious way to go about this *sigh*. I would prefer not to use the zoom-in/out widget. I have been trying a number of other techniques but am not satisfied with the feel. Looking for suggestions from the community on alternative approaches. A one fingered zoom?
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Jan 17, 2010
I recently discovered that the Android 2.0 SDK supports multitouch through new functions in the MotionEvent class. You can specify a pointer index when retrieving touch properties, and in cases where multiple fingers are on the screen there should be multiple pointers provided.
Unfortunately, I only have a G1 to test on and it's running Android 1.5 and not 2.0.
Is there any way to test multitouch without a 2.0 device? In the iPhone simulator, you can hold down option and shift option to perform two fingered pinch and two fingered drag, respectively. Is there any similar functionality in the Android emulator? Is it something I should expect to see in the future, or should I just suck it up and buy a new test phone?
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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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Jan 27, 2009
via Slashdot ..
http://yro.slashdot.org/article.pl?sid=09%2F01%2F27%2F024242&from=rss
Does this really put the kabosh on multitouch on Android for the next 18 years? Anyone out there have any thoughts on this?
www.smileproject.com
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Apr 26, 2010
If i have implemented a database in an application. So what ever the tables i create in that database will be saved in /data/data/packagename/databasess My question is how many tables i can create or how much data can i insert. How to know capacity of the database.In which factors will it depends.
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Apr 22, 2009
I am implementing notification handler which logs any changes in content provider and it notifies Broadcast Receiver using custom Intent on periodic basis.But problem here is from Provider to Receiver all the values passed through Bundle.
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Aug 3, 2010
My application isn't working when user zoom in more then 18 times. How to set a maximum value to zoom?
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