Remember that if you wish to match the aspect ratio of the actual drawable, adjustViewBounds=true must be declared along with not defining an explicit width and/or height. Refer to this ImageView ScaleType visual guide for additional reference. If you’re creating a photo-viewing application, you will probably want to use the center or fitCenter scale types. However, be mindful of potential distortions of the image due to scaling. Note: The fitXY scale type allows you to set the exact size of the image in your layout. A Matrix class can be used to apply transformations such as rotations to an image. The matrix can be supplied using the setImageMatrix method. Scales the image using a supplied Matrix class. Scales the x and y dimensions to exactly match the view size does not maintain the image aspect ratio. Same as fitCenter but aligned to the bottom right of the view.
Same as fitCenter but aligned to the top left of the view. At least one axis will exactly match the view, and the result is centered inside the view. Scales the image to fit inside the view, while maintaining the image aspect ratio. If the image is already smaller than the view, then this is the same as center. Scales the image such that both the x and y dimensions are greater than or equal to the view, while maintaining the image aspect ratio centers the image in the view. The following is a list of all the most common types: Scale Typeĭisplays the image centered in the view with no scaling. Above we discussed the fitXY type along with adjustViewBounds to match the aspect ratio of the drawable. Scale TypesĪn ImageView can display an image differently based on the scaleType provided. We can achieve this using an extended ResizableImageView class as described in the post. In certain cases, the image needs to be scaled to fit the parent view's width and the height should be adjusted proportionally.
IMAGE ICON RESIZE JAVA CODE
We can also size an ImageView at runtime within our Java source code by modifying the width or height inside getLayoutParams() for the view: imageView. īy combining these properties together we can control the rough size of the image and still adjust the image according to the proper aspect ratio. Otherwise, the dimensions cannot be readjusted to meet the required aspect ratio. by using maxWidth and using wrap_content for the dimension). However, we must either allow the height and/or width to be adjustable (i.e. We can take advantage of the adjustViewBounds parameter to preserve this aspect ratio. The scaleType above has been set to fitXY which sets the height and the width up or down to fit the maximum dimensions specified.įixing 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. They can also be bounded by their layout_width and layout_height attributes: Sizing ImageView Controlsīy default, contents of an ImageView control are of a certain size - usually the size of the image dimensions. 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. Note the scaleType attribute which defines how the images will be scaled to fit in your layout. The ImageView handles all the loading and scaling of the image for you.
The ImageView looks like this in res/layout/activity_main.xml: UsageĪt 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.
IMAGE ICON RESIZE JAVA HOW TO
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. 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. import, images are displayed using the built-in image view. Then we add the jLabel component to jFrame and set the visibility of the frame as true. Now we create a JLabel object and set its icon using tIcon() function. The size can be adjusted according to our needs.
To show the label icon, we need a JFrame object with a FlowLayout and a size of 500 x 500. Now we create an icon to be shown in the JLabel. Next we convert the image to a BufferedImage object using ImageIO.read(). To read the image file, we use the File class and pass the path of the image. JLabel extends JComponent, and we can attach this component to a JFrame. In the first example, we use JLabel class of the Swing library. Below we will see how to display an image in Java using two methods. We can show an image using several ways in Java.
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