在gallery中，如何为android中的每个图像提供不同的背景

您好，我在这里做一个应用程序，我需要水平显示图像。所以使用gallery我显示图像。但我需要gallery中每个图像的不同背景。我不知道怎么做。 我给了图库背景，但整个图库只有一个相同的背景。但我需要每个图像有不同的背景。任何人都可以帮助我。我使用下面的代码创建树

       example .class:
        public class example extends Activity {
/** Called when the activity is first created. */
  private Gallery gallery;
           private ImageView imgView;
      private Integer[] Imgid = {
        R.drawable.popup2, R.drawable.a_2, R.drawable.a_3, R.drawable.a_4, R.drawable.a_5, R.drawable.a_6, R.drawable.a_7};
            @Override
           public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    gallery = (Gallery) findViewById(R.id.examplegallery);
    gallery.setAdapter(new AddImgAdp(this));
     }
        public class AddImgAdp extends BaseAdapter {

    int GalItemBg;

    private Context cont;


    public AddImgAdp(Context c) {

        cont = c;

        TypedArray typArray = obtainStyledAttributes(R.styleable.GalleryTheme);

        GalItemBg = typArray.getResourceId(R.styleable.GalleryTheme_android_galleryItemBackground, 0);

        typArray.recycle();

    }


    public int getCount() {

        return Imgid.length;

    }


    public Object getItem(int position) {

        return position;

    }


    public long getItemId(int position) {

        return position;

    }

            @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
          ImageView imgView = new ImageView(cont);
                    imgView.setImageResource(Imgid[position]);
            imgView.setLayoutParams(new Gallery.LayoutParams(80, 70));
               imgView.setScaleType(ImageView.ScaleType.FIT_XY);
              imgView.setBackgroundResource(GalItemBg);
                return imgView;
    }
       }
    }

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我认为

GalItemBg

变量是在适配器类的构造函数中初始化的，在调用

getView

方法时它没有改变，因此您得到了相同的背景

试一试

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查看这个ImageAdapter示例。您应该有一些对drawables中图像的引用的sorf列表，并使用imageView.setImageResource（mimageId[position]）在适配器的getView方法中设置它们

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您必须使用适配器的getView方法来设置不同Imageview的背景图像 //存储背景图像 整数[]backGroundImage={R.drawable.background1，R.drawable.background2，R.drawable.background3}

公共视图getView（int位置、视图转换视图、视图组父视图）{

//后退地面图像 setBackgroundResource（backGroundImage[count]）； }

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    ImageView imgView = new ImageView(cont);
    imgView.setImageResource(Imgid[position]);
    imgView.setLayoutParams(new Gallery.LayoutParams(80, 70));
    imgView.setScaleType(ImageView.ScaleType.FIT_XY);
    imgView.setBackgroundResource(Imgid[position]);
    return imgView;
}

public class ImageAdapter extends BaseAdapter {
    int mGalleryItemBackground;
    private Context mContext;

    private Integer[] mImageIds = {
            R.drawable.sample_1,
            R.drawable.sample_2,
            R.drawable.sample_3,
            R.drawable.sample_4,
            R.drawable.sample_5,
            R.drawable.sample_6,
            R.drawable.sample_7
    };

    public ImageAdapter(Context c) {
        mContext = c;
        TypedArray attr = mContext.obtainStyledAttributes(R.styleable.HelloGallery);
        mGalleryItemBackground = attr.getResourceId(
                R.styleable.HelloGallery_android_galleryItemBackground, 0);
        attr.recycle();
    }

    public int getCount() {
        return mImageIds.length;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView = new ImageView(mContext);

        imageView.setImageResource(mImageIds[position]);
        imageView.setLayoutParams(new Gallery.LayoutParams(150, 100));
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        imageView.setBackgroundResource(mGalleryItemBackground);

        return imageView;
    }
}

ImageView imageView = new ImageView(cont);
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