Question

我所拥有的是一个名为FullImageActivity2的类，它显示图像，我可以在此活动中使用寻呼机适配器在图像之间切换我有一个TextView，它应该显示每个图像的项目ID和它从字符串数组中获取值。我可以将TextView与值连接，但是当我翻转图像时值不会改变，我的意思是我希望每个图像都与它的id相关联，当我翻转图像时它应该改变并显示正确的图片。

这是我的活动代码：

public class FullImageActivity2 extends Activity {


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_full_image_activity2);
        String[] nameArray={"Su6670","SU10670","PB6670","PB10670"}; 
        TextView itemid=(TextView)findViewById(R.id.itemid);
         //get intent data

 //Selected image id
Integer[] newArray={R.drawable.bottle1,R.drawable.bottle2,R.drawable.bottle3,R.drawable.bottle4};


    ImageAdapter imageAdapter = new ImageAdapter(this, newArray);
    List<ImageView> images = new ArrayList<ImageView>();

    for (int i1 = 0; i1 < imageAdapter.getCount(); i1++) {
        ImageView imageView = new ImageView(this);

        imageView.setImageResource(imageAdapter.mThumbIds[i1]);

        itemid.setText(nameArray[i1]);

        images.add(imageView);
    }

    // Finally create the adapter
    ImagePagerAdapter imagePagerAdapter = new ImagePagerAdapter(images);
    ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
    viewPager.setAdapter(imagePagerAdapter);
    for (int m=0; m<imagePagerAdapter.getCount();m++){
          itemid.setText(nameArray[m]);
    }

    }
}

这是图像寻呼机适配器代码：

 public class ImagePagerAdapter  extends PagerAdapter{
            private List<ImageView> images;

            public ImagePagerAdapter(List<ImageView> images) {
                this.images = images;
            }

            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                ImageView imageView = images.get(position);
                container.addView(imageView);
                return imageView;
            }

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

            @Override
            public int getCount() {
                return images.size();
            }


            @Override
            public boolean isViewFromObject(View view, Object o) {
                // TODO Auto-generated method stub
                  return view == o;
            }
        }

它始终在PB10670中显示值TextView。我该如何解决这个问题？

Answer 1

您必须将OnPageChangeListener设置为ViewPager

viewPager.setOnPageChangeListener(new OnPageChangeListener()
{

    @Override
    public void onPageSelected(int arg0)
    {
        itemid.setText(nameArray[arg0]);
    }

    @Override
    public void onPageScrolled(int arg0, float arg1, int arg2)
    {
    }

    @Override
    public void onPageScrollStateChanged(int arg0)
    {
    }
});

这样，只要您翻转图片，TextView中的文字就会根据当前位置发生变化。

如何使用图像寻呼机适配器获得正确的值并在文本视图中设置？

1 个答案: