android 入门进修条记attr.xml TypedArray obtainStyledAttributes 利用

 需要引入

import android.content.res.Resources; import android.content.res.TypedArray;

obtainStyledAttributes 浸染就是从我们本身界说的attr.xml读取所需信息

public class ImageAdapter extends BaseAdapter { int mGalleryItemBackground; private Context mContext; private Integer[] myImageIds; public ImageAdapter(Context c, Integer[] aid) { mContext = c; myImageIds = aid; TypedArray a = obtainStyledAttributes(R.styleable.Gallery); mGalleryItemBackground = a.getResourceId ( R.styleable.Gallery_android_galleryItemBackground, 0 ); a.recycle(); } @Override public int getCount() { // TODO Auto-generated method stub return myImageIds.length; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return null; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView (int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub /*发生ImageView工具*/ ImageView i = new ImageView(mContext); /*配置图片给imageView工具*/ i.setImageResource(myImageIds[position]); /*从头配置图片的宽高*/ i.setScaleType(ImageView.ScaleType.FIT_XY); /*从头配置Layout的宽高*/ i.setLayoutParams(new Gallery.LayoutParams(138, 108)); /*配置Gallery配景图*/ i.setBackgroundResource(mGalleryItemBackground); /*返回imageView工具*/ return i; } }