Android:ImageView 上的矩阵运算，动画？

Question

我正在使用矩阵来平移/缩放 ImageView，设置 ImageMatrix 后，结果直接显示，是否有任何方式使其动画化？

谢谢!

Answer 1

放大将是平移和缩放的组合:

// zooms in to the center of the screen
mZoomIn = new AnimationSet(true);

mTranslate = new TranslateAnimation(
                Animation.ABSOLUTE, 0.0f, Animation.ABSOLUTE, -imageViewXCoord/(mScreenWidth/mImageViewWidth),
                Animation.ABSOLUTE, 0.0f, Animation.ABSOLUTE, -imageViewYCoord/(mScreenWidth/mImageViewWidth)
            );
mTranslate.setDuration(200);

mScale = new ScaleAnimation(1, mScreenWidth/mImageViewWidth, 1, mScreenWidth/mImageViewWidth);
mScale.setDuration(200);

mZoomIn.addAnimation(mTranslate);
mZoomIn.addAnimation(mScale);
mZoomIn.setFillAfter(true);
mZoomIn.setFillEnabled(true);

mImageView.startAnimation(mZoomIn);

缩小将涉及放大时的反向插值器，之后您可以按照正常方式在 ImageView 上调用 startAnimation:

mZoomIn.setInterpolator(new ReverseInterpolator())