Is there a way to animate scaleType="centerCrop"? I need to scale my image to certerCrop so the image can cover the entire area of the imageView. But I need to animate it to show the user the actual look of the image before it is being scaled I was planning to do it this way
imageView.animate().scaleX(2.0f).setDuration(2000)
but the problem is that I will be doing this on multiple image for a slide show so each image will have a different size and orientation.
I also found this library https://github.com/flavioarfaria/KenBurnsView but still having problems using it.
Any help will be much appreciated thanks.
EDITED
Started working on the KenBurnsView still not able to pan the image to center.
I wrote a custom ImageView to support animation between ScaleTypes, Hope it is helpful for you. And forgive my bad English, It is not my first language.
Usage:
AnimatedImageView animatedImageView = new AnimatedImageView(context) or findViewById(R.id.animated_image_view);
animatedImageView.setAnimatedScaleType(ImageView.ScaleType.CENTER_CROP);
animatedImageView.setAnimDuration(1000); // default is 500
animatedImageView.setStartDelay(500);
animatedImageView.startAnimation;
AnimatedImageView
/**
* Custom ImageView that can animate ScaleType
* Originally created by Wflei on 16/5/31.
* Updated by Mike Miller (http://www.mikemilla.com) on 6/15/2017.
* Original StackOverflow Post - https://stackoverflow.com/a/37539692/2415921
*/
public class AnimatedImageView extends android.support.v7.widget.AppCompatImageView {
// Listener values;
private ScaleType mFromScaleType, mToScaleType;
private ValueAnimator mValueAnimator;
private int mStartDelay = 0;
private boolean isViewLayedOut = false;
// Constructors
public AnimatedImageView(Context context) {
this(context, null);
}
public AnimatedImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public AnimatedImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// Set default original scale type
mFromScaleType = getScaleType();
// Set default scale type for animation
mToScaleType = getScaleType();
// Init value animator
mValueAnimator = ValueAnimator.ofFloat(0f, 1f);
// Set resource
updateScaleType(mFromScaleType, false);
}
/**
* Sets the scale type we want to animate to
*
* @param toScaleType
*/
public void setAnimatedScaleType(ScaleType toScaleType) {
mToScaleType = toScaleType;
}
/**
* Duration of the animation
*
* @param animationDuration
*/
public void setAnimDuration(int animationDuration) {
mValueAnimator.setDuration(animationDuration);
}
/**
* Set the time delayed for the animation
*
* @param startDelay The delay (in milliseconds) before the animation
*/
public void setStartDelay(Integer startDelay) {
mStartDelay = startDelay == null ? 0 : startDelay;
}
@Override
public void setScaleType(ScaleType scaleType) {
super.setScaleType(scaleType);
mFromScaleType = scaleType;
}
@Override
public void setImageDrawable(Drawable drawable) {
super.setImageDrawable(drawable);
updateScaleType(mFromScaleType, false);
}
@Override
public void setImageBitmap(Bitmap bm) {
super.setImageBitmap(bm);
updateScaleType(mFromScaleType, false);
}
@Override
public void setImageResource(int resId) {
super.setImageResource(resId);
updateScaleType(mFromScaleType, false);
}
@Override
public void setImageURI(Uri uri) {
super.setImageURI(uri);
updateScaleType(mFromScaleType, false);
}
/**
* Animates the current view
* and updates it's current asset
*/
public void startAnimation() {
// This will run the animation with a delay (delay is defaulted at 0)
postDelayed(startDelay, mStartDelay);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
// View has been laid out
isViewLayedOut = true;
// Animate change when bounds are official
if (changed) {
updateScaleType(mToScaleType, false);
}
}
/**
* animate to scaleType
*
* @param toScaleType
*/
private void updateScaleType(final ScaleType toScaleType, boolean animated) {
// Check if view is laid out
if (!isViewLayedOut) {
return;
}
// Cancel value animator if its running
if (mValueAnimator != null && mValueAnimator.isRunning()) {
mValueAnimator.cancel();
mValueAnimator.removeAllUpdateListeners();
}
// Set the scale type
super.setScaleType(mFromScaleType);
// Get values for the current image matrix
setFrame(getLeft(), getTop(), getRight(), getBottom());
Matrix srcMatrix = getImageMatrix();
final float[] srcValues = new float[9], destValues = new float[9];
srcMatrix.getValues(srcValues);
// Set the scale type to the new type
super.setScaleType(toScaleType);
setFrame(getLeft(), getTop(), getRight(), getBottom());
Matrix destMatrix = getImageMatrix();
if (toScaleType == ScaleType.FIT_XY) {
float sX = ((float) getWidth()) / getDrawable().getIntrinsicWidth();
float sY = ((float) getHeight()) / getDrawable().getIntrinsicHeight();
destMatrix.postScale(sX, sY);
}
destMatrix.getValues(destValues);
// Get translation values
final float transX = destValues[2] - srcValues[2];
final float transY = destValues[5] - srcValues[5];
final float scaleX = destValues[0] - srcValues[0];
final float scaleY = destValues[4] - srcValues[4];
// Set the scale type to a matrix
super.setScaleType(ScaleType.MATRIX);
// Listen to value animator changes
mValueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float value = animation.getAnimatedFraction();
float[] currValues = Arrays.copyOf(srcValues, srcValues.length);
currValues[2] = srcValues[2] + transX * value;
currValues[5] = srcValues[5] + transY * value;
currValues[0] = srcValues[0] + scaleX * value;
currValues[4] = srcValues[4] + scaleY * value;
Matrix matrix = new Matrix();
matrix.setValues(currValues);
setImageMatrix(matrix);
}
});
// Save the newly set scale type after animation completes
mValueAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
// Set the from scale type to the newly used scale type
mFromScaleType = toScaleType;
}
});
// Start the animation
if (animated) {
mValueAnimator.start();
}
}
}
