Zooming With Multiple Images?
Jan 23, 2012
I'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.
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Nov 13, 2009
I have a folder on sd-card in which I keep photos edited in my application. Im trying to force deafult android image viewer to see all pictured in that folder. Unfortunately I am able to see only one picture. The "next" and "previous" arrows are disabled.
The code i use to see only one picture:
CODE:.....
How to activate the browsing option? how to call the intent so that every picture in that folder would be visible?
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Jul 28, 2009
I build an email application using intents. I can send a email with one image attachment. I tried to attach multiple images using "putExtra ()" method.But it still send only a single image.
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Oct 14, 2010
I need to include multiple images in my Android app. It's like an image viewer/slideshow. Currently I switch between pictures from /drawable-mdpi dir simply with ImageView and adapter, using gestures to left/right. Works but nothing impresive :/
Basically I could use something like Android (2.1) gallery with some image show animation.
1st question: what's the best way to include many (50-100) fullscreen images in App?
2nd: is it possible to use ViewFlipper animations directly to images? or do i have to somehow populate Views?
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Aug 22, 2010
During my game loop I am constantly loading images using BitmapFactory.decodeResource(getResources(), R.drawable.objectx); Most of the time I'm calling images that have already been decoded earlier. Am I slowing down execution by decoding the resource every time? Is it better to store every image into a Map (or Dictionary) at the beginning of the program? If so, how do you get the resource IDs for all images in the drawable folder?
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Jun 17, 2010
I was just wondering if Android had built in code so that I could select multiple images in a gallery-view and then have those images exported as filenames in a string array(ex /sdcard/~f1.jpg, /sdcard/~f2.jpg,...).
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Sep 9, 2010
I am basically trying to send more then one image at once through text message is that possible? I know of slideshows but how do i go about creating one and sending it through text message.
I also tried using the search engine on this forum and not a great one in my opinion compare to other search engines i have used in car forums. So if there is already a thread just like the one i have create please redirect me and close my thread Mods.
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Oct 12, 2010
i want to create a bitmap / image which has many images like "Collage" which has more then one images in a single picture. I have stored all my images in a grid view but now i want to create a single image from all those images. And even i want to make few images click able so what can be the road map to do this ? any sort of help / example will be helpful. search for a for collage image image in google . one can see what it is exactly.
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Jul 19, 2012
Does the built in sms app fix the receiving 1 or multiple images as a slideshow? I know it isn't really a bug and is just how the app works, but I was wondering if there were any changes to the sms app in Jelly Bean for those who may not want that feature.
I am currently using Handcent but sometimes I still get images as a slideshow. I'm also having to click on the message to download it before I can view the slideshow.
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Jun 16, 2010
I need a small help on rotating one image around its center of axis among multiple images which are drawn to canvas in android.
I am loading images to canvas like below.
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Feb 4, 2009
Here is the problem, I am building an application and have multiple images that need to switch when the user touches the screen, doesn't matter where the users touches. The press the screen and the images switch randomly. I purchased the ebook "Professional Android Application Development" and have torn though it. I am stumped. I'm thoroughly confused at this point. Any ideas on where I can go or how I can accomplish this?
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Jun 1, 2010
I want do display some images that I load from a remote source in a gallery. The gallery should let the user do the following things:
-zoom the image (preferably also by pinch-zoom) -pan the image -switch between the different images
Of course most built-in gallery applications can do all of that. So my first idea was to use an ACTION_VIEW intent in order to delegate the task to some gallery application. This however won't work for me since you can only pass the URI of the image you want to display but not the actual bitmap data itself. I can't just pass the URL of the remote image because I need to manage the loading and caching of the data myself. A way around this would be to write the data to a local file and then pass the URI of that file (and deleting the file again afterward). Besides this being less than elegant it won't even do the trick because with an intent like this you can only pass one image at a time.
The built-in Facebook application on the Nexus One actually does exactly what I have in mind for displaying photo albums. It looks like a custom gallery activity they built into their application. Does anyone know whether there are templates available for something like this somewhere that one could reuse? Building something like this from scratch by myself seems too time consuming.
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Sep 11, 2010
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.)
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Feb 25, 2010
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.
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May 27, 2010
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.
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Nov 1, 2009
The 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.
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Feb 15, 2010
We 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:........................
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Nov 24, 2010
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:.......................
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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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Oct 21, 2010
I have purchased Xperia X8 yesterday and was trying to use camera and I could not use zooming...
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Sep 13, 2010
Am I missing something? I can't get the Droid X to zoom in video mode.
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Jul 15, 2010
Would 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.
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Feb 26, 2010
I 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.
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Jul 28, 2010
So 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...?
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Jul 15, 2010
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?
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Oct 26, 2010
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?
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Jul 18, 2010
I 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?
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Jun 8, 2010
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.
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Apr 30, 2010
Simple 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?
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Nov 2, 2009
I'm basically using the same method of loading bitmaps in OpenGL that the SpriteMethodTest example uses and have been unable to get rid of an annoying outline that appears around all of my images.
For example, If I were to load an image of a white circle on a white background, I would expect to see nothing. Instead, I would see my circle because its edge would be gray. In SpriteMethodTest, I replaced the background image with white and was able to see that the edges of the android images flying around also don't seem to be rendered correctly.
Does anyone know how to load images in OpenGL without having a thin outline appear around the images?
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