Android :: Implement Multitouch Image Zooming?
Jun 16, 2010I'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.
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.
So is there a way for a webview control to detect a swipe while capable of doing multitouch zoom and having build-in zoom controls?
View 1 Replies View RelatedSimple question - how is text-zooming implemented on an Android/iPhone device? Do they pre-compute frequently used bitmaps of a font and replace the text as the scale changes? Or do they extract the contours from the font files and render the text as vector graphics?
View 1 Replies View RelatedI have an android application that needs to zoom an image about centre. i implemented the code...
View 1 Replies View RelatedI have a png and a jpg image on disk. I'd like to use any built-in intent (if any are available) to view the image (just a single one at a time). Something like this:
Intent intent = new Intent();
intent.setImagePath("/blah/myimage.jpg");
startActivity(intent);
is there a built-in intent in android to do this, or do I have to write my own image viewing-activity? It would be cool if there was one that had panning/zooming as found in WebView.
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..
View 1 Replies View RelatedI 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.
View 3 Replies View RelatedSample 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?
View 2 Replies View RelatedOk I have been trying to figure this out for a while. I have an application that needs to read images from a folder created by the application on the sdcard. I have no idea what the names of the files are because the user specifies the names of the files. I need to read the images from the folder and make something like the default image viewer, where you can share them delete them and things like that. Im thinking read them into a grid view first but 1) cant figure out how to dynamically read them from a folder 2) how would I implement the image options like the default viewer? If there was a way to open the default viewer on a certain folder that would help.
Anyways any input would be amazing been working on it for a while.
This should be easy, but I'm having trouble figuring out how to zoom an ImageView. I have an ImageView inside of a ScrollView and a HorizontalScrollView. I floated a ZoomControls over the ImageView and now I'm trying to figure out how to actually zoom the image.
I was thinking I would just scale the Drawable inside of the ImageView, but I can't figure out an easy way to do this.
How should I be going about displaying an image that I can both zoom and scroll?
And yes, I know about WebViews, but it seems wasteful to load an entire WebView just to display one image.)
I'm new to android. I'm using webview in scrollview to display my local html page (html has text only). I created two buttons for zoomin and zoomout using behind function zoomIn() & zoomOut() respectively. These functions work fine. The problenm is, when I zoom in, some of the text goes out from both top and bottom and it doesn't appear when I scroll.
View 1 Replies View RelatedWe have developed a GPS based app in which it record the user routes and show it on the map.......but Panning around on the map when reviewing my route is painfully slow, it takes at least 4 or 5 seconds for the map to respond the finger swipes......
Overridden the onDraw() method and drawing the lines to show the routes whenever we zoom on the map, the lat-long is again drawn by calling onDraw()(Overridden) method , which has the geopoints with lat- lon values, and thus it becomes very slower process to display the map .. is there any better way to do this so that panning becomes faster as in "MyTracks"
Following is the code to draw the routes on map...........please look into it and guide me how can i make it more efficient so that the panning and zooming works well......
CODE:........................
I've developed a GPS app in which i record the user routes and show it on the map. But panning around on the map when reviewing my route is painfully slow, it takes at least 4 or 5 seconds for the map to respond the finger swipes.
I've overridden the onDraw() method and drawing the lines to show the routes whenever we zoom on the map, the lat-long is again drawn by calling onDraw()(Overridden) method, which has the geopoints with lat-lon values, and thus it becomes very slow to display the map. Is there any better way to do this so that panning becomes faster as in the application "MyTracks"?
Following is the code to draw the routes on map. Please look into it and show me how I can make it more efficient so that the panning and zooming works well.
CODE:.......................
If a user does a "pinch zoom" on the map, my overlays don't properly size until the end. This has been noted in other posts, so i assume it is a known issue.
Problem is, my client finds it totally unacceptable, as I am tasked with making the android app look as good as the iphone version.
Is there any way to correct this, even if it is a horrible hack? For instance, can I subclass the mapview and handle drawing or override some other method?
I am about to develop a web application for smart phones. This app uses some JavaScript code. While testing it on Android devices (Hero, Desire) I noticed that all JavaScript timers immediately stop when the page is moved or zoomed. They never continue. Let's say you have a site which displays web camera images with 5 fps. As soon as you move this page (I mean scroll with finger) the web camera image will never be loaded again. So you can't center or zoom the image at all without stopping the stream. This behaviour is 100% reproducible on all Android devices I tested (1.5, 2.1). It does not appear on an iPhone which continues execution after moving stopped fine.
View 2 Replies View RelatedI'm creating an app that allows the user to zoom in and out and pan around the screen.
My question is this, how would I allow this to be done with multiple images? Lets say I have a background grid image and 3 market bag images. Is there away of doing this neatly and efficiently in Java?
Here's the code I've got so far:
DesignBoard.java
Code:
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.os.Bundle;
[Code]...
For those interested in pinch zoom, visit this link.
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.
Im using a Hero and was disappointed that I cant zoom in when viewing my presentation in Google Docs mobile using the default browser. When I pinch zoom or double tap, the control buttons on the slide enlarge but the slide stays the same size also, I found out that if I turned off javascript in the browser settings, I can zoom in the slide as usual but then the control buttons stop working.
View 1 Replies View RelatedThe moment renders multi touch zooming obsolete as far as I am concerned. Yeah, it might be neat. But IMHO, the zooming buttons on this browser works better. The centering feature when zooming works better. And you can zoom with one hand. Anyway, I will not miss it at all and I think the zoom feature on this is much better.
View 1 Replies View RelatedI have purchased Xperia X8 yesterday and was trying to use camera and I could not use zooming...
View 4 Replies View RelatedAm I missing something? I can't get the Droid X to zoom in video mode.
View 4 Replies View RelatedWould I be right in thinking that when you are using the video camera you can't use the zoom function? I pressed every button and touched the screen a few times but nothing did it, had to stop filming, zoom in and start again.
View 5 Replies View RelatedSo I used the "one touch" root method that I found in these forums, I think it was from Alldroid. Anyway so now I can no longer multi touch to zoom. Anyone else notice this or have an idea for the fix?
Also I have no cursor while typing in this box...?
One of the things I really like about the Incredible's browser is the fact that when you zoom in on text, it will reformat it so that you don't have to scroll from side to side to read everything, it makes it all in one column and does a very good job. Does the X's browser do this as well?
View 7 Replies View RelatedI got the Vibrant today and the default web browser, although fast, is frustrating to navigate with all the constant zooming and scrolling necessary to read through the content. What's the best mobile web app for this phone?
View 11 Replies View RelatedIt will be helpful if any one can help me out in understanding the concept of radio,flash,system image in android mobile device. Also why are they required? and what is their role in Device?
View 2 Replies View Relatedi am unable to zoom pictures using the phone camera.. mostly all mobiles can zoom using the volume key. but it doesnt happen this way in xperia.. saddest part is that i cant find any option over the screen to zoom my pictures. is there no option at all wid this mobile??? or is there an option of downloading some camera features like these? i dont know. m styuc
View 14 Replies View RelatedI'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.
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)
View 2 Replies View RelatedI'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:........................