Android : Takes Drawable Object - Scale Image - Save Memory?
Aug 23, 2010
I need to know how he takes drawable object. I'm collecting some ImageView objects in array, they have background images that are rather big in resolution so they take lot of memory...
I have read somewhere that it will automatically create image with resolution that my imageView have, so i think it will take less memory than first one. Please tell me, if i set scaleType property, will it scale that image? Will that help me to save memory?
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Sep 9, 2009
On a layout I want to scale the background image (keeping its aspect ratio) to the space allocated when the page gets created. I am using layout.setBackgroundDrawable() and am using a BitmapDrawable to setGravity for clipping and filling, but don't see any option for scaling.
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Sep 9, 2009
On a layout I want to scale the background image (keeping it's aspect ratio) to the space allocated when the page gets created. Anyone have any idea how to do this?
I am using layout.setBackgroundDrawable() and am using a BitmapDrawable to setGravity for clipping and filling, but don't see any option for scaling.
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Nov 26, 2009
In my application, user can click on a button and then he can select a picture from his gallery. This image is then displayed.
However, when the user performs 3 or 4 times this operation, the following exception is thrown, due to memory allocation problem code...
Here a sample of my code ...
Is it possible to force object (here the Drawable object) to be released from memory?
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Oct 6, 2010
Is there a way to scale the Drawable passed to TextView.setCompoundDrawables ? The following code works very well but of course is set to the full intrinsic size of the drawable. This code is used with the Holder pattern in a ListView where the purpose is to update the drawable without two more Views (LinearLayout and ImageView) to accomplish the same thing. code...
I suppose I can use Drawable.setBounds() and preserve the original aspect ratio with a small function but just wondering if there this a more direct way to do this with the api?
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Apr 14, 2009
I have constructed a Bitmap object in Java. Can you please tell me how can I scale it (x, y with a different ratio) on android?
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Oct 15, 2009
There are several custom-made graphic objects (.png files) included in the project inside res/drawable map.
All elements are normally loaded and displayed in the user interface except two icons and so far haven't figured out what causes the problem.
The code which doesn't affect the user interface as it should is...
In both cases there is only ic_volume_small displayed on the screen and the Variables window in the IDE displays the following:
R.drawable.ic_volume_small = Class not
loaded : net.client.android.R$drawable
R.drawable.ic_volume_of_small = Class
not loaded :
net.client.android.R$drawable
The method (member of IconImage class) which should change the icon image is the following code...
Does anyone know what could cause the described problem?
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Oct 18, 2010
How can i set the opacity of a Drawable object?
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Aug 21, 2010
I'm designing a custom view which is an X/Y Plot. It's a moving graph that scrolls to the left with time and new Y values are continuously coming in at 10 per second.
I've been able to make it work with an array of integers where the array index is the X value and the integer value is the Y value, but this seems horribly inefficient (Because every time it comes time to re-paint, I have to loop 800+ times to paint the graph). Then we do it all again 10 times a second. yuck.
Can anybody think of a paintable object that I can draw points to and perform some kind of scroll transformation and then just draw the new points each time, rather than the whole canvas?
Any other ideas out there?
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Jun 12, 2010
I need to create a map with items on it (the map consists of a drawable object, which represents a room) and I thought about using buttons with background images for the items so that they are clickable.
I guess the AbsoluteLayout fits here the best, but unfortunately it's deprecated. What layout would you recommend me for this kind of application ? Is there another layout which supports X/Y coordinates ?
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Aug 24, 2010
Is there a way to load an image file into an ImageView object, and then define a transparent color for this object?
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Nov 3, 2010
I have a tab layout with drawable resources as tab images.
In landscape mode everything fine. But in portrait mode images doesn't have some margin from tabs. How I can change images scale or how to set some margin to image? I don't want use fixed size, don't think that it is right way.
Here is my layout code...
Here is tab creation code...
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Mar 26, 2010
In android, I defined an ImageView's layoutWidth to be 'fill_parent' (which takes up the full width of the phone). My question is if the Image i put to ImageView is bigger than the layoutWidth, android will scale it, right? But what about the height? when android scale it, will it keeps the aspect ratio? What I find out is, there is some 'white space' at the top/bottom of the ImageView when android scales an image which is bigger than the ImageView. Is that true? If yes, how can I eliminate that white spaces?
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Aug 13, 2010
I'm battling with extending a TextView for my Android app. I'd like to create "bubbles" to display text messages in a conversation, similar to the native iPhone SMS conversations.
Is there a way to implement the resizing of a background image without just stretching it? I'd like to have a single background image that keeps it's corners but get stretched only in defined areas. I think this should be possible because I've seen it in a SMS app, but I wonder how to implement that.
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Oct 19, 2010
Now I'm using the follow code to scale down the image downloaded from internet at runtime. But the result is not good enough.
Bitmap.createScaledBitmap(srcBitmap, dstWidth, dstHeight, true);
Any help?
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Nov 24, 2010
I have an activity which uses android:theme="@android:style/Theme.Dialog". The activity contains an ImageView which can show images of different dimensions. The ImageView should scale the Image so that it entirely fits into the window, at least on axes fits entirely and maintains the original aspect ratio. The size of the dialog should only be as large as the ImageView (plus its border width).
I tried the following but the dialog window always uses the whole available space:
code:............................
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Sep 24, 2010
I have problem with displaying bitmap image on imageview on high density screen (480x800). When the bitmap image loaded from file on sdcard, the image does not scale to fit hdpi screen. On medium density screen it works normal (320x480).code...
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Jul 27, 2010
Can anyone tell me what the desire is like for memory. i know that it takes a micro sd upto 32 gig but what can be saved on that is it just music ext or will the downloaded apps save to this also? what is the phone memory like im sorry im due upgrade and my choice is between this and the samsung galaxy s.
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Sep 2, 2010
Does someone know how to save and restore an object to a file on android ?
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Apr 2, 2010
I have a Timer in my application, and would like to allow the user to set the timer, and maybe cancel it in another execution of the application. To do that, I need to have a reference to the Timer created in the first execution. How can I obtain that? Is there a way of storing/retrieving memory addressed?
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Aug 26, 2010
I am working with android's 9 patch image emulator to create 9 patch image..
Can anyone tell me how it actually works?
On what basis it Scale the image?
What are the parameters it considers to stretch image?
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Oct 19, 2010
Does all resource (all in res folder if on eclipse IDE), specially drawable image, is loaded to memory during runtime? Or it is just like a file which is available when the application need it?
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Dec 1, 2009
I created an application with loging and an arraylist to fill a ListView.
If i am calling or i need to check my mail, sometimes i lost the context of my application (variables and the listview !)
It is a little complex to save arraylist in SharedPreferences and i am not an expert in SQLite.
Do you know a solution to keep persistent my data (variables and the arraylist) during the use of my application?
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Mar 16, 2010
I need to create a object Image from import javax.microedition.lcdui.Image; using a file .png placed in drawable folder. How can i do that?
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May 1, 2010
I have the following drawable which draw a rectangle. Can you please tell me how can I add a 9patch image as the background of this drawable? code...
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Nov 7, 2010
Say I have some simple class and once it's instantiated as an object I want to be able to serialize its contents a file, and retrieve it by loading that file at some later time.. I'm not sure where to start here, what do I need to do to serialize this object to a file?
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Nov 2, 2010
i am implementing puzzle game application in this application create one button in click the button display original image of the puzzle .original image display in dialog box then click ok return in to actual page how can implemented.
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Nov 1, 2010
A number of images are "built in" to my app. They are stored in the drawable folder. I'd like to give the option of sending one of these images via mms (or even email) to someone in the user's address book. All the examples I've seen are sending images that are stored somewhere other then the default Eclipse drawable folders.
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Mar 17, 2010
I have a picture in res/drawable directory: res/drawable/picture.jpeg.
Can I dynamically update this picture.jpeg from code? i.e. I want to use another picture to replace this picture in the drawable directory dynamically. If I can, what path should I use to access the picture? Should I use "res/drawable/picture.jpeg"?
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Nov 15, 2009
I have an app that I started in 1.6. It used images that were specific to portrait and landscape layouts. I put these in the corresponding drawable folders, for example:
drawable/image01,png
drawable-land/image01.png
when I created a new project with 2.0 it gave me the following folders. drawable drawable-hdpi drawable-mdpi drawable-lpdi. when I look at the documentation around these folders it all seems very straight forward. I assumed that you were able to create the following folders. drawable-hdpi-land drawable-mdpi-land drawable-lpdi-land
and everything would work as before. The image directory would swap automagically pulling the appropriately laid out image depending on your screen orientation. Unfortunately it does not. The SDK seems to get confused, and if I clean the project, the folders come up as poorly named.
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