Android:以编程方式选择Gallary图片 [英] Android: programmatically select Gallary image

问题描述

我的应用程序中有一个Gallery视图，可以正常工作.当单击Gallery项目时，我正在ImageView中显示完整图像.首次加载活动时，我想以编程方式在完整图像的ImageView中显示第一张图像，这样用户不必单击图库中的第一项.

I have a Gallery view in my application which is working fine. When clicking on a Gallery item, I'm displaying the full image in an ImageView. When the activity is first loaded, I want to display the first image in the full image's ImageView programmatically, so that the user doesn't have to click the first item in the Gallery.

---编辑----

--- Edit ----

public void onCreate() {
//other code

    ga = (Gallery)findViewById(R.id.photo_gallary);
    imageView = (ImageView)findViewById(R.id.gallary__full_img);

    ga.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            displayFullImg(arg2);               
        }           
    });


ga.setAdapter(new ImageAdapter(this));
ga.setSelection(0);
}//onCreate

private void displayFullImg(int arg2){
  Item item = pics.get(arg2);
  String url = item.getImageUri();
  imageView.setImageBitmap(url);
}

推荐答案

您可以直接使用

imageView.setImageBitmap(pics.get(0).getImageUri());

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