Two imageViews vs one imageView and a canvas

Posted by user3009842 on Stack Overflow See other posts from Stack Overflow or by user3009842
Published on 2014-08-25T04:10:58Z Indexed on 2014/08/25 4:20 UTC
Read the original article Hit count: 137

Filed under:

android

|

canvas

|

imageview

I have a bitmap and I want to scale it up to fill an ImageView and overlay the unscaled version of the bitmap on top.

Which would be cheaper (in terms of memory and processor usage)?

Using two ImageViews, one for each version of the bitmap
Using a canvas and drawing on the singular bitmap, using one ImageView

I saw this question about ImageView vs Canvas, but it doesn't address memory/processor concerns. My intuition says two ImageViews may use more RAM, while using a canvas would use more processing power while the drawing occurs.

© Stack Overflow or respective owner

Related posts about android

Please verify my layout: bottom button keeps coming up over keyboard

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi everyone, I have a layout which does almost what I want. There's just one bug regarding the button at the bottom. I should stay at the bottom at all times. But whenever I bring up the soft-keyboard the button will be displayed above the keyboard. This is not what I want but it should become covered… >>> More
Android programming. Application stopped unexpectedly.

as seen on Stack Overflow - Search for 'Stack Overflow'
I've just created a prototype of interface for my android app and tried to run it. Unfortunately I get an error that my app has stopped unexpectedly (my reputation doesn't allow me to post images so follow my links): screenshot of error message This is layout mode of editing. Everything looks as… >>> More
Listview Row Overlap Problem

as seen on Stack Overflow - Search for 'Stack Overflow'
I just updated my app and I am getting some odd complaints from people who update it. I am only getting complaints from people with non-stock android phones (phones that manufacturers have modified...HTC phones, cliq, pulse, etc), other phones like the Droid, Nexus work fine. My app (Photo Frame Deluxe)… >>> More
Why are some of my view not aligned correctly at the bottom of my relative layout?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have problems getting some of my views aligned in a relative layout that I use inside a row of my listview. Here is a screenshot from the layout builder in Eclipse, this is what I think it should look like: The next image is from the emulator. Now the TestTestTest View is at the top and covers… >>> More
Android RatingBar weirdness: Whenever I add a RatingBar to my layout, a bunch of the generated tags,

as seen on Stack Overflow - Search for 'Stack Overflow'
Whenever I use a RatingBar view in my layout, I suddenly get all kinds of compile errors. I'm using Android 2.0, but I've also tried 2.0.1, and 2.1, without joy. I also get a message: Shader 'android.graphics.BitmapShader' is not supported in Layout Editor, and an odd warning which may or maynot be… >>> More

Related posts about canvas

Canvas context used but not updated on canvas

as seen on Stack Overflow - Search for 'Stack Overflow'
I am developing an small html5 game, where I have the following code: if(object.blocks){ var blocks = object.blocks, that = this; each(blocks,function(index){ that.blocks.push(new Block(this[index])); }); } I receive an object with some configuration and instantiate blocks… >>> More
Clearing canvas with Canvas.drawColor()

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm attempting to change the background image of a custom View with some success. The image will change but the problem is that I still see traces of the old image. When I attempt to clear the canvas before drawing the new image, it doesn't appear to work. I create a bitmap to store the image.… >>> More
HTML 5 Canvas - Dynamically include multiple images in canvas

as seen on Stack Overflow - Search for 'Stack Overflow'
I need to include multiple images in a canvas. I want to load them dynamically via a for-loop. I tried a lot but in the best case only the last image is displayed. I check this tread but I still get only the last image. For explanation, here's my latest code(basically the one from the other post): … >>> More
WPF Constrain the resize of a canvas' child object to the dimensions of the canvas

as seen on Stack Overflow - Search for 'Stack Overflow'
Given the following XAML: <Window x:Class="AdornerTesting.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="500" Width="500" Loaded="Window_Loaded"> <Grid… >>> More
place and show pixel in the Cartesian plane graph in JavaFX

as seen on Stack Overflow - Search for 'Stack Overflow'
I have this method to draw the Cartesian plane in JavaFX, using canvas and would like to know if it is possible to place or show the pixel: public class Grafics extends StackPane { private Canvas canvas; public void Grafics(){ GridPane grid = new GridPane(); … >>> More