Menu
The src should stretch its width to match_parent, while keeping aspect ratio. When the image is larger than the parent, it scales down correctly. But when the image is smaller, it does not scale up. (illustration shows desired behavior).
<RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" > <ImageView android:id="@+id/banner" android:layout_width="match_parent" android:layout_height="wrap_content" android:scaleType="fitCenter" android:adjustViewBounds="true" android:src="@drawable/foo" /> </RelativeLayout> Using ScaleType.fitXY stretches the width only
788
When you work with background images, you may want an image to stretch to fit the page despite the wide range of devices and screen sizes. The best way to stretch an image to fit the background of an element is to use the CSS3 property, for background-size, and set it equal to cover.
Answer: Use the CSS max-width Property You can simply use the CSS max-width property to auto-resize a large image so that it can fit into a smaller width <div> container while maintaining its aspect ratio.
If your image doesn't fit the layout, you can resize it in the HTML. One of the simplest ways to resize an image in the HTML is using the height and width attributes on the img tag. These values specify the height and width of the image element. The values are set in px i.e. CSS pixels.
You can use the CSS background-size: cover; to stretch and scale an image in the background with CSS only. This scales the image as large as possible in such a way that the background area is completely covered by the background image, while preserving its intrinsic aspect ratio.
I believe that is not possible, at least not with the options provided by scaleType attribute.
Your best option in this case is to use centerCrop, but only the center of the picture will be visible.
However, if you are not ok with this option, then you could scale the image programatically without loosing aspect ratio. In order to achieve this you'll need to calculate a scale factor based on the screen width, and then use this scale factor to know the new height of the image.
Like this:
ImageView imageView = (ImageView)findViewById(R.id.imageView); Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.foo); int imageWidth = bitmap.getWidth(); int imageHeight = bitmap.getHeight(); int newWidth = getScreenWidth(); //this method should return the width of device screen. float scaleFactor = (float)newWidth/(float)imageWidth; int newHeight = (int)(imageHeight * scaleFactor); bitmap = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true); imageView.setImageBitmap(bitmap); Also, you'll need to adjust the declaration of ImageView in layout file:
<ImageView android:id="@+id/imageView" android:layout_width="wrap_content" android:layout_height="wrap_content" /> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
