实现与双指缩放图库 [英] Implementing a Gallery with pinch zoom

问题描述

我有一个图像画廊，我想就可以启用双指缩放。另外，他们的工作就好了。问题是，我不能为我的生活结合他们两个人在一起！我试图在ImageZoomView绑定在ImageAdapter，都无济于事。我应该尝试这样做，当用户点击了图片？没有人有任何其他的想法？ 这是code在ImageAdapter.class返回画廊元素：

I have a gallery of images and I'm trying to enable pinch zoom on it. Separately, they work just fine. The problem is, I can't for the life of me bind the two of them together! I tried to bind the ImageZoomView in the ImageAdapter, to no avail. Should I try doing it when the user clicks the image? Does anyone have any other ideas? This is the code in ImageAdapter.class that returns the gallery elements:

    public View getView(int position, View convertView, ViewGroup parent) {

    ImageView i = new ImageView(mContext);
    Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(),mImageIds[position]);
    i.setLayoutParams(new Gallery.LayoutParams(300, 450));
    i.setScaleType(ImageView.ScaleType.FIT_XY);
    i.setBackgroundResource(mGalleryItemBackground);
    i.setImageBitmap(bitmap);
    return i;
}

这是我如何处理它MainActivity.class：

And this is how I handle it in MainActivity.class:

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gallery);

        Gallery g = (Gallery) findViewById(R.id.gallery);
        g.setAdapter(new ImageAdapter(this));

        Log.i("blah","e ok");

        g.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
    //            mBitmap = ImageAdapter.mImageIds[position];



 //               mZoomView = (ImageZoomView)findViewById(R.id.zoomview);
 //               mZoomView.setZoomState(mZoomControl.getZoomState());
 //               mZoomView.setImage(mBitmap);


 //               Toast.makeText(MainActivity.this, "" + position, Toast.LENGTH_SHORT).show();
            }
        });

正如你所看到的，我试过的东西，但我的应用程序总是崩溃。 :(任何帮助将AP preciated。

As you can see, I tried something, but my app always crashes. :( Any help here would be appreciated.

推荐答案

您应该创建 ImageZoomView 在 getView 法，假设ImageZoomView是你自己的子类ImageView的小部件的部件。

You should create the ImageZoomView in the getView method, assuming the ImageZoomView is a widget of your own subclassing the ImageView widget.

这篇关于实现与双指缩放图库的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！