Question

ImageAdapter班级

public class ImageAdapter extends PagerAdapter implements AdapterView.OnItemClickListener {
    Context context;
    private int[] GalImages = new int[] {//array storing all images used in the 'slideshow' in the main menu
            R.drawable.savedpageex,
            R.drawable.ic_cdi_icon,
            R.drawable.savedpageex,
            R.drawable.ic_cdi_icon
    };

    ImageAdapter(Context context){
        this.context=context;
    }

    @Override
    public int getCount() {
        return GalImages.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == ((ImageView) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ImageView imageView = new ImageView(context);
      //  int padding = context.getResources().getDimensionPixelSize(R.dimen.abc_panel_menu_list_width);
        imageView.setPadding(1, 1, 1, 1);
        imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
        imageView.setImageResource(GalImages[position]);
        ((ViewPager) container).addView(imageView, 0);

        return imageView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        ((ViewPager) container).removeView((ImageView) object);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        final int clickedImage = GalImages[position];
    }
}

在MainActivity中

ViewPager viewPager = (ViewPager)findViewById(R.id.viewpager);

ImageAdapter adapter = new ImageAdapter(this);
wrappedAdapter = new InfinitePagerAdapter(adapter);
viewPager.setAdapter(wrappedAdapter);

viewPager.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        Toast.makeText(getApplicationContext(), "clicked", Toast.LENGTH_LONG).show();
    }
});

现在，图片显示并且循环播放，我确实需要帮助让图片“滑动”。在设定的时间间隔，但主要问题是为每个页面设置onClickListeners＆＃39;。有什么帮助/建议吗？

Answer 1

您可以在onClickListener中添加一个switch语句，如下所示

switch(viewPager.getCurrentItem()){
    case 0:
       //stuff for first page
       break;
    case 1: 
       //stuff for second page
       break;
}

......等等。

或向viewpager添加状态以描述它正在显示的“页面” 并使用该信息在onClickListener中执行不同的操作

如何为viewpager中的每张幻灯片设置onClickListeners？

1 个答案: