Android resize imageview based on screen size

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Android resize imageview based on screen size

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Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Hi, can you help me resize the image based on the imageView size?

A guide for Android ImageView ScaleType and adjustViewBounds

If i hardcode in the xml the imageView height or width, the resize work correctly, but if i change the Height inside the javacode and then i load the image the size are not corrected. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

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Sign up. New issue. Jump to bottom. Labels Problem. Copy link Quote reply. Builder getApplicationContext. This comment has been minimized. Sign in to view. Thanks a lot.

How to scale image size depending on an android screen?

It worked perfect for me also. Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment. Linked pull requests. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.In this post, you can learn how to display image full screen when it is clicked.

Since the trigger for full screen display is an image click event, we need to handle this event. In the on click handler, start the activity passing full screen indicator in the intent as extra information. Android app development tutorials and web app development tutorials with programming examples and code samples. Android Drawable Resources Tutorial. Android Capture Image from Camera and Save. Android Fragments Tutorial.

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Android Slices with Examples. Home Android Java. Android Image Full Screen Example October 28, In this post, you can learn how to display image full screen when it is clicked. About Android app development tutorials and web app development tutorials with programming examples and code samples.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I want to show 3x3 sized gridview. I want to set the height and width based on device size. I am taking reference from this link. Do not use screen sizein a multi-windows context this method is invalid. If your grid is a 3x3 items size fixed, so use custom layout ViewGroup like this: and set RelativeLayout items content.

Android Development - 8 - Working With ImageViews

EDIT : see my update in code, you have simply to add your images to the items containers. With this method, no XML layout file needed because you manage content and size yourself.

And for the gridview, I would suggest you to take a look at this awesome library called Staggered Grid View.

android resize imageview based on screen size

And their sample here. I use the following approach when I have to resize my Activity s, I assume the same is valid for your case:. Learn more. Asked 6 years, 1 month ago. Active 6 years, 1 month ago. Viewed 13k times. John R. John R John R 1, 8 8 gold badges 28 28 silver badges 55 55 bronze badges. I know but images in grid view on some screens take only above half screen. Yes but I want to make changes in my code.

I check my code on tablet. Gridview take only half screen. Active Oldest Votes. LayoutParams RelativeLayout. You completely changed my code. Please help me with one thing if I have to send value of image to next activity where I can do this.Typically, images are displayed using the built-in image view. This view takes care of the loading and optimizing of the image, freeing you to focus on app-specific details like the layout and content.

In this guide, we will take a look at how to use an ImageView, how to manipulate bitmaps, learn about the different density folders and more. At the simplest level, an ImageView is simply a view you embed within an XML layout that is used to display an image or any drawable on the screen. The ImageView handles all the loading and scaling of the image for you.

Note the scaleType attribute which defines how the images will be scaled to fit in your layout. In the example, using scaleType "center", the image will be displayed at its native resolution and centered in the view, regardless of how much space the view consumes.

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By default, contents of an ImageView control are of a certain size -- usually the size of the image dimensions. The scaleType above has been set to fitXY which sets the height and the width up or down to fit the maximum dimensions specified. Fixing the width and height however means that the proportions of the width and height of the original image, known as the aspect ratio, will be altered. We can take advantage of the adjustViewBounds parameter to preserve this aspect ratio.

Otherwise, the dimensions cannot be readjusted to meet the required aspect ratio. By combining these properties together we can control the rough size of the image and still adjust the image according to the proper aspect ratio. We can also size an ImageView at runtime within our Java source code by modifying the width or height inside getLayoutParams for the view:.

In certain cases, the image needs to be scaled to fit the parent view's width and the height should be adjusted proportionally. We can achieve this using an extended ResizableImageView class as described in the post. An ImageView can display an image differently based on the scaleType provided. Above we discussed the fitXY type along with adjustViewBounds to match the aspect ratio of the drawable. The following is a list of all the most common types:. Note: The fitXY scale type allows you to set the exact size of the image in your layout.

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However, be mindful of potential distortions of the image due to scaling. Refer to this ImageView ScaleType visual guide for additional reference. Since Android has so many different screen sizes, resolutions and densities, there is a powerful system for selecting the correct image asset for the correct device. There are specific drawable folders for each device density category including: ldpi lowmdpi mediumhdpi highand xhdpi extra high.

Notice that every app has folders for image drawables such as drawable-mdpi which is for "medium dots per inch". To create alternative bitmap drawables for different densities, you should follow the scaling ratio between the four generalized densities. Refer to the chart below:. This means that if you generate a x for mdpi 1x baselinethen you should generate the same resource in x for hdpi 1.

See these density guidelines for additional details.I need to resize an ImageView such that it fits to the screen, maintains the same aspect ratio. The following conditions hold:.

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For example, a tiny 50x50 image on a px width screen would scale the image up to x px. A x image would scale to x I've looked at most of the other threads, and many proposed solutions like simply changing adjustViewBounds and scaleType will only scale down an image, and not scale it up.

I created it with the help of this Bob Lee's answer in this post: Android: How to stretch an image to the screen width while maintaining aspect ratio? Resizing ImageView to fit to aspect ratio 2 I need to resize an ImageView such that it fits to the screen, maintains the same aspect ratio.

The following conditions hold: Images are a fixed width size of the width of screen Images are downloaded from the Internet, i. Context ; import android.

android resize imageview based on screen size

AttributeSet ; import android. I prefer Agarwal's answer with some modifications, because it is resuable: package com. Drawable ; import android. How to scale an Image in ImageView to keep the aspect ratio Android imageview not respecting maxWidth?By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. After clarifications: This cannot be done in xml only. It is not possible to scale both the image and the ImageView so that image's one dimension would always be dp and the ImageView would have the same dimensions as the image. This code scales Drawable of an ImageView to stay in a square like dp x dp with one dimension exactly dp and keeping the aspect ratio.

Then the ImageView is resized to match the dimensions of the scaled image. The code is used in an activity. I tested it via button click handler. May not be answer for this specific question, but if someone is, like me, searching for answer how to fit image in ImageView with bounded size for example, maxWidth while preserving Aspect Ratio and then get rid of excessive space occupied by ImageView, then the simplest solution is to use the following properties in XML:.

The Below code make the bitmap perfectly with same size of the imageview. Get the bitmap image height and width and then calculate the new height and width with the help of imageview's parameters. That give you required image with best aspect ratio.

Anyway, you just set the height to what ever you want in dp, then set the width to wrap content or visa versa. Use scaleType fitCenter to adjust the size of the image. I was looking through this post for how to do it, and finally did what I want, not the way described here though.

And the result is that image fits inside perfectly, keeping aspect ratio, and doesn't have extra leftover pixels from ImageView when the Bitmap is inside. I needed to get this done in a constraint layout with Picasso, so I munged together some of the above answers and came up with this solution I already know the aspect ratio of the image I'm loading, so that helps :.

ImageLoader is my own static class for image loading util methods and constants. My pictures are added dynamically in a gridview. When you make these settings to the imageview, the picture can be automatically displayed in ratio.

Use Simple math to resize the image. Learn more. Fit image into ImageView, keep aspect ratio and then resize ImageView to image dimensions? Ask Question.

android resize imageview based on screen size

Asked 8 years, 4 months ago. Active 1 month ago. Viewed k times. How to fit an image of random size to an ImageView? Janusz k gold badges silver badges bronze badges. Uh, do you mean to change the size of the ImageView to the image size? Or do you mean how to scale the image to the ImageView bounds.

Do you need to maintain aspect ratio? I want the ImageView to have the dimensions of the image, and the image to have its largest dimension equals to dp and to keep its aspect ratio. I'll update my question. Active Oldest Votes.Android is a versatile OS with more than device manufacturers and more than distinct devices. Screen size of android phones vary from 2.

It is difficult for designers to create such designs which work well on all these devices irrespective of the size, density and aspect ratio of device and still stay developer friendly. Android provides basic structure to support these devices by putting them in different density buckets i. Android calculates DP size by using following formula:. Density conversion factor for density buckets are as follows: ldpi: 0. For more details about DIP read here. So in this approach, designer can create a base design and can provide resources drawables for all density buckets.

android resize imageview based on screen size

Developer just need to create the basic layout according to the base design and put the drawables in correct drawable-density folder and thats it, OS will pick the correct resources based on current device and design will look awesome on following screens:. It means Density independent size of devices vary vastly. Fundamentally Samsung Galaxy Mega is dp wider and dp taller than base size. Reason for creating base designs for highest supported density is that we can down scale drawables for lesser density buckets easily.

For scalability designers can utilise following guidelines: 1. Guidelines for background 2. Guidelines for foreground. First of all, its not a recommended approach as it might cause memory issue. Even though if designer needs to use full screen image as background, there are following ways to scale it:. If dimension of the largest supported phone is X px, designer can use the background image of this size.

On smaller devices image will be cropped from center. We can categorise foreground designs in following three types according to the content scrollability: 1 Non scrollable content 2 Vertically scrollable content 3 Horizontally scrollable Content. Most of the splash screens lie in this category. Tips for designer: 1. Can create designs in which some part is non-stretchable logo in above example and other parts are stretchable 5 list items in above example 2. Cannot change the size of text for specific density bucket: it means if the size of text for mdpi is 16px it will remain same for all mdpi devices but for other density buckets Android will automatically scale them according to the density conversion factor, so for hdpi devices text size will be 24 px, for xhdpi devices text size will be 32 px and so on.

Cannot change the size of image for specific density bucket. If content is vertically scrollable, no special arrangement needed to tackle with extra height as more vertical content will be visible. For dealing with extra available width designer can arrange content as follows:. Can keep left and right margins constant for all the devices of same density bucket.

In list row, can keep left and right items with fixed width and can make item in center stretchable. In above list, icon image and distance text are of fixed width.

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Center text item name and description is of variable width, so it will cover the extra width available on larger devices. Can show the images which cover full width of device and can keep the aspect ratio intact. Can make text to cover full width. On wider devices extra content will be visible in one line 3.


Can show buttons, edit texts to cover full width. Only background will be stretched. Text on button or edit text will remain the same size. Background of these elements could be color, gradient, 9-patch drawable or repeating pattern.


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