Resizing ImageView to fit to aspect ratio
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?
package com.yourpackage.widgets;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;
public class AspectRatioImageView extends ImageView {
public AspectRatioImageView(Context context) {
super(context);
}
public AspectRatioImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public AspectRatioImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = width * getDrawable().getIntrinsicHeight() / getDrawable().getIntrinsicWidth();
setMeasuredDimension(width, height);
}
}
Now to use it in the XML:
<com.yourpackage.widgets.AspectRatioImageView android:layout_centerHorizontal="true"
android:src="@drawable/yourdrawable" android:id="@+id/image"
android:layout_alignParentTop="true" android:layout_height="wrap_content"
android:layout_width="match_parent" android:adjustViewBounds="true" />
Have fun!
ImageView mImageView; // This is the ImageView to change
// Use this in onWindowFocusChanged so that the ImageView is fully loaded, or the dimensions will end up 0.
public void onWindowFocusChanged(boolean hasFocus)
{
super.onWindowFocusChanged(hasFocus);
// Abstracting out the process where you get the image from the internet
Bitmap loadedImage = getImageFromInternet (url);
// Gets the width you want it to be
intendedWidth = mImageView.getWidth();
// Gets the downloaded image dimensions
int originalWidth = loadedImage.getWidth();
int originalHeight = loadedImage.getHeight();
// Calculates the new dimensions
float scale = (float) intendedWidth / originalWidth;
int newHeight = (int) Math.round(originalHeight * scale);
// Resizes mImageView. Change "FrameLayout" to whatever layout mImageView is located in.
mImageView.setLayoutParams(new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.WRAP_CONTENT,
FrameLayout.LayoutParams.WRAP_CONTENT));
mImageView.getLayoutParams().width = intendedWidth;
mImageView.getLayoutParams().height = newHeight;
}