(我有res / drawable中的图像,数据库中的图像名称) 我已经完成了从res / drawable到listview显示图像,但图像显示相同的图片.. 我希望显示其他人的差异图像......
如何从drawable文件夹中更改图像ID(使用setImageResource())。我的drawable文件夹包含多个图像,我想使用已存储的数据库中的名称更改这些图像..
这是我的教程代码......
//来自数据库的结果(image2.jpg)
public KontakItemListBaseAdapter(Context context, ArrayList<KontakItemDetails> results) {
itemDetailsrrayList = results;
l_Inflater = LayoutInflater.from(context);
}
public int getCount() {
return itemDetailsrrayList.size();
}
public Object getItem(int position) {
return itemDetailsrrayList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
try{
ViewHolder holder;
if (convertView == null) {
convertView = l_Inflater.inflate(R.layout.kontak_details_view, null);
holder = new ViewHolder();
holder.txt_itemName = (TextView) convertView.findViewById(R.id.name);
holder.txt_itemDescription = (TextView) convertView.findViewById(R.id.itemDescription);
holder.itemImage = (ImageView) convertView.findViewById(R.id.photo);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txt_itemName.setText(itemDetailsrrayList.get(position).getName());
holder.txt_itemDescription.setText(itemDetailsrrayList.get(position).getItemDescription());
holder.itemImage.setImageResource(R.drawable.iddy);
}catch (Exception ex) {
throw new Error("kontakitemlistadapter :"+ex.toString());
}
return convertView;
}
static class ViewHolder {
TextView txt_itemName;
TextView txt_itemDescription;
TextView txt_itemPrice;
ImageView itemImage;
}
我认为我的问题在这里..
holder.itemImage.setImageResource(R.drawable.iddy);
如何将R.drawable.iddy更改为路径名?
答案 0 :(得分:1)
你可以将Arrays中的所有Drawables id作为:
private Integer[] images;
Field[] list = R.drawable.class.getFields();
int count = 0, index = 0, j = list.length;
images = new Integer[count];
try {
for(int i=0; i < j; i++)
images[index++] = list[i].getInt(null);
} catch(Exception e) {}
现在使用images Array在Adapter的getView方法中将Image src设置为:
holder.itemImage.setImageResource(images[position]);
答案 1 :(得分:0)
根据上下文更改可绘制参考
holder.itemImage.setImageResource(R.drawable.iddy);