将ImageView中的图像缩放到完整大小

Question

I have an ImageView and an extern image which gets load into the ImageView on start. The problem is: the image doesn't have the height of the device. The width is correctly full size. How can I achieve the image to be as high as the deviceheight so that it is fullscreen?

Answer 1

If you don't care about aspect ratio , use

android:adjustViewBounds="false" 
android:scaleType="fitXY"

Or if programatically...

ImageView imageView = (ImageView)v.findViewById(R.id.fullImage);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);

Hope this helps...

Answer 2

Try this

Display mDisplay= activity.getWindowManager().getDefaultDisplay();
int width= mDisplay.getWidth();
int Height= mDisplay.getHeight();

You can get the device height and set the imageview's height programmatically.

imageView.getLayoutParams().height = Height;

Answer 3

First set width and height of your imageview to match_parent

There are few scale type provided by imageview widget in android :

out of which, I use centerCrop very often because it maintains the aspect ratio but you can find what suits you better.

android:scaleType="centerCrop"

also don't forget to write this line in your xml :

android:adjustViewBounds="false"