大家好，又见面了，我是你们的朋友全栈君。
我在我的项目中使用了一个画廊,其中我添加了四个图像,我希望它从右侧和左侧都是无限的.我该如何做到这一点？
解决方法:
主要思想是在你的getView方法中,你必须使用
position = position % imagesArray.length;
if (position < 0)
position = position + imagesArray.length;
imagesArray是将图像保存在res文件夹中的数组.例如：
public class CircularGallery extends Activity {
/** Called when the activity is first created. */
private Integer[] imagesArray = { R.drawable.picture1, R.drawable.picture2, R.drawable.picture3, R.drawable.picture4, R.drawable.picture5, R.drawable.picture6 , R.drawable.picture7 };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Gallery g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this));
g.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
if (position >= imagesArray.length) {
position = position % imagesArray.length;
}
Toast.makeText(CircularGallery.this, “” + position, Toast.LENGTH_SHORT).show();
}
});
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
mGalleryItemBackground = a.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 0);
a.recycle();
}
public int getCount() {
return Integer.MAX_VALUE;
}
public Object getItem(int position) {
if (position >= imagesArraylength) {
position = position % mImageIds.length;
}
return position;
}
public long getItemId(int position) {
if (position >= imagesArray.length) {
position = position % imagesArray.length;
}
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
if (position >= imagesArray.length) {
position = position % imagesArray.length;
}
i.setImageResource(imagesArray[position]);
i.setLayoutParams(new Gallery.LayoutParams(80, 80));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
return i;
}
public int checkPosition(int position) {
if (position >= imagesArray.length) {
position = position % imagesArray.length;
}
return position;
}
}}
此外,一些开发人员已经完成了这样的功能,您可以在他们的博客上找到来源
标签：android-gallery,android
来源： https://codeday.me/bug/20191007/1867746.html
发布者：全栈程序员-站长，转载请注明出处：https://javaforall.net/130233.html原文链接：https://javaforall.net
