私はhtml形式のデータをいくつか持っています。Androidでデータをテキストビューに設定するときに Html.fromHtml(String) を使用しています。また、html データには 2 ~ 3 個の画像が含まれています。html データから画像の名前を取得し、配列に格納したいと考えています。配列内の画像の数に基づいて、画像ビューに設定します。イメージタグの src からイメージ名を取得するにはどうすればよいですか?
つまり、正規表現または部分文字列を使用して、どちらがより良いオプションになりますか?
いくつかの解決策を提案し、いくつかの例を手伝ってください。
私のコード:
public View getView(int position, View convertView, ViewGroup parent)
{
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desc = (TextView) view.findViewById(R.id.description);
URLImageParser p = new URLImageParser(desc, this);
Spanned htmlSpan = Html.fromHtml(listItem.getdesc(), p, null);
desc.setText(htmlSpan);
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}
public class URLDrawable extends BitmapDrawable {
// the drawable that you need to set, you could set the initial drawing
// with the loading image if you need to
protected Drawable drawable;
@Override
public void draw(Canvas canvas) {
// override the draw to facilitate refresh function later
if(drawable != null) {
drawable.draw(canvas);
}
}
}
public class URLImageParser implements ImageGetter {
ListAdapter c;
View container;
/***
* Construct the URLImageParser which will execute AsyncTask and refresh the container
* @param t
* @param listAdapter
*/
public URLImageParser(View t, ListAdapter listAdapter) {
this.c = listAdapter;
this.container = t;
}
public Drawable getDrawable(String source) {
URLDrawable urlDrawable = new URLDrawable();
// get the actual source
ImageGetterAsyncTask asyncTask =
new ImageGetterAsyncTask( urlDrawable);
asyncTask.execute(source);
// return reference to URLDrawable where I will change with actual image from
// the src tag
return urlDrawable;
}
public class ImageGetterAsyncTask extends AsyncTask<String, Void, Drawable> {
URLDrawable urlDrawable;
public ImageGetterAsyncTask(URLDrawable d) {
this.urlDrawable = d;
}
@Override
protected Drawable doInBackground(String... params) {
String source = params[0];
return fetchDrawable(source);
}
@Override
protected void onPostExecute(Drawable result) {
// set the correct bound according to the result from HTTP call
urlDrawable.setBounds(0, 0, 0 + result.getIntrinsicWidth(), 0
+ result.getIntrinsicHeight());
// change the reference of the current drawable to the result
// from the HTTP call
urlDrawable.drawable = result;
// redraw the image by invalidating the container
URLImageParser.this.container.invalidate();
}
/***
* Get the Drawable from URL
* @param urlString
* @return
*/
public Drawable fetchDrawable(String urlString) {
try {
InputStream is = fetch(urlString);
Drawable drawable = Drawable.createFromStream(is, "src");
drawable.setBounds(0, 0, 0 + drawable.getIntrinsicWidth(), 0
+ drawable.getIntrinsicHeight());
return drawable;
} catch (Exception e) {
return null;
}
}
private InputStream fetch(String urlString) throws MalformedURLException, IOException {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet request = new HttpGet(urlString);
HttpResponse response = httpClient.execute(request);
return response.getEntity().getContent();
}
}
}