放大viewflipper图片 [英] zoom in viewflipper images

问题描述

我有一个包含3图像viewflipper。对于刷卡action.I要实现放大和缩小影响每个这些图像，对于正确读取影像上的著作，这些图像与onGestureListener有关。有一些办法呢？请帮我用一些例子。谢谢

I have a viewflipper that contain 3 images. these images are associated with onGestureListener for swipe action.I want to implement zoom in and zoom out effect on each of these images, for properly reading the writings on images. Is there some way out? Please help me with some example. Thanks

推荐答案

这个问题已经被问过，但你可以做到这样的：

The question was already asked, but you can do it like this :

iv = (ImageView) findViewById(R.id.imageview);
zc = (ZoomControls) findViewById(R.id.zoom_controls);
zc.setOnZoomInClickListener(new OnClickListener() {
    public void onClick(View v) {
        float oldZoom = currentZoom;
        currentZoom = currentZoom * 1.25;
        zc.setIsZoomOutEnabled(true);
        if (3.0 < currentZoom) {
            zc.setIsZoomInEnabled(false);
        }
        scaleAnim = new ScaleAnimation(oldZoom, currentZoom, oldZoom, currentZoom, 0, 0);
        scaleAnim.setFillAfter(true);
        iv.startAnimation(scaleAnim);
    }
});
zc.setOnZoomOutClickListener(new OnClickListener() {
    public void onClick(View v) {
        float oldZoom = currentZoom;
        currentZoom = currentZoom / 1.25;
        zc.setIsZoomInEnabled(true);
        if (0.33 > currentZoom) {
            zc.setIsZoomOutEnabled(false);
        }
        scaleAnim = new ScaleAnimation(oldZoom, currentZoom, oldZoom, currentZoom, 0, 0);
        scaleAnim.setFillAfter(true);
        iv.startAnimation(scaleAnim);
    }
});

来源：在viewflipper 放大图片

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