Example usage for android.widget ImageView getGlobalVisibleRect

Introduction

In this page you can find the example usage for android.widget ImageView getGlobalVisibleRect.

Prototype

public final boolean getGlobalVisibleRect(Rect r) 

Source Link

Usage

From source file:Main.java

public static Rect getBitmapRectFromImageView(ImageView imageView) {
    Drawable drawable = imageView.getDrawable();
    Bitmap bitmap = null;/*ww  w .j av  a2s  .c  om*/
    if (drawable instanceof BitmapDrawable) {
        bitmap = ((BitmapDrawable) drawable).getBitmap();
    }

    Rect rect = new Rect();
    boolean isVisible = imageView.getGlobalVisibleRect(rect);
    if (!isVisible) {
        int[] location = new int[2];
        imageView.getLocationOnScreen(location);

        rect.left = location[0];
        rect.top = location[1];
        rect.right = rect.left + imageView.getWidth();
        rect.bottom = rect.top + imageView.getHeight();
    }

    if (bitmap != null) {

        int bitmapWidth = bitmap.getWidth();
        int bitmapHeight = bitmap.getHeight();

        int imageViewWidth = imageView.getWidth() - imageView.getPaddingLeft() - imageView.getPaddingRight();
        int imageviewHeight = imageView.getHeight() - imageView.getPaddingTop() - imageView.getPaddingBottom();

        float startScale;
        if ((float) imageViewWidth / bitmapWidth > (float) imageviewHeight / bitmapHeight) {
            // Extend start bounds horizontally
            startScale = (float) imageviewHeight / bitmapHeight;
        } else {
            startScale = (float) imageViewWidth / bitmapWidth;
        }

        bitmapHeight = (int) (bitmapHeight * startScale);
        bitmapWidth = (int) (bitmapWidth * startScale);

        int deltaX = (imageViewWidth - bitmapWidth) / 2;
        int deltaY = (imageviewHeight - bitmapHeight) / 2;

        rect.set(rect.left + deltaX, rect.top + deltaY, rect.right - deltaX, rect.bottom - deltaY);

        return rect;
    } else {
        return null;
    }
}

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From source file:MainActivity.java

private void zoomFromThumbnail(final ImageView imageViewThumb) {
    if (mCurrentAnimator != null) {
        mCurrentAnimator.cancel();//from   w  w w  .  j ava 2  s  . co  m
    }

    final Rect startBounds = new Rect();
    final Rect finalBounds = new Rect();
    final Point globalOffset = new Point();

    imageViewThumb.getGlobalVisibleRect(startBounds);
    findViewById(R.id.frameLayout).getGlobalVisibleRect(finalBounds, globalOffset);
    mImageViewExpanded
            .setImageBitmap(loadSampledResource(R.drawable.image, finalBounds.height(), finalBounds.width()));

    startBounds.offset(-globalOffset.x, -globalOffset.y);
    finalBounds.offset(-globalOffset.x, -globalOffset.y);

    float startScale;
    if ((float) finalBounds.width() / finalBounds.height() > (float) startBounds.width()
            / startBounds.height()) {
        startScale = (float) startBounds.height() / finalBounds.height();
        float startWidth = startScale * finalBounds.width();
        float deltaWidth = (startWidth - startBounds.width()) / 2;
        startBounds.left -= deltaWidth;
        startBounds.right += deltaWidth;
    } else {
        startScale = (float) startBounds.width() / finalBounds.width();
        float startHeight = startScale * finalBounds.height();
        float deltaHeight = (startHeight - startBounds.height()) / 2;
        startBounds.top -= deltaHeight;
        startBounds.bottom += deltaHeight;
    }

    imageViewThumb.setVisibility(View.GONE);
    mImageViewExpanded.setVisibility(View.VISIBLE);
    mImageViewExpanded.setPivotX(0f);
    mImageViewExpanded.setPivotY(0f);

    AnimatorSet animatorSet = new AnimatorSet();
    animatorSet.play(ObjectAnimator.ofFloat(mImageViewExpanded, View.X, startBounds.left, finalBounds.left))
            .with(ObjectAnimator.ofFloat(mImageViewExpanded, View.Y, startBounds.top, finalBounds.top))
            .with(ObjectAnimator.ofFloat(mImageViewExpanded, View.SCALE_X, startScale, 1f))
            .with(ObjectAnimator.ofFloat(mImageViewExpanded, View.SCALE_Y, startScale, 1f));
    animatorSet.setDuration(1000);
    animatorSet.setInterpolator(new AccelerateInterpolator());
    animatorSet.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            mCurrentAnimator = null;
        }

        @Override
        public void onAnimationCancel(Animator animation) {
            mCurrentAnimator = null;
        }
    });
    animatorSet.start();
    mCurrentAnimator = animatorSet;
}

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