Android TextView 显示HTML加图片(2)

mport java.io.InputStream;

import Android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Environment;
import android.text.Html.ImageGetter;
import android.util.Log;
import android.widget.TextView;

public class HtmlImageGetter implements ImageGetter{
 private TextView _htmlText;
 private String _imgPath;
 private Drawable _defaultDrawable;
 private String TAG = "HtmlImageGetter";
 
 public HtmlImageGetter(TextView htmlText, String imgPath, Drawable defaultDrawable){
  _htmlText = htmlText;
  _imgPath = imgPath;
  _defaultDrawable = defaultDrawable;
 }
 
 @Override
 public Drawable getDrawable(String imgUrl) {
 
  String imgKey = String.valueOf(imgUrl.hashCode());
  String path = Environment.getExternalStorageDirectory() + _imgPath;
  FileUtil.createPath(path);
 
  String[] ss = imgUrl.split("\\.");
  String imgX = ss[ss.length-1];
  imgKey = path+"/" + imgKey+"."+imgX;
 
 
  if(FileUtil.exists(imgKey)){
   Drawable drawable = FileUtil.getImageDrawable(imgKey);
   if(drawable != null){
    drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
    return drawable;
   }else{
    Log.v(TAG,"load img:"+imgKey+":null");
   }
  }
 
  URLDrawable urlDrawable = new URLDrawable(_defaultDrawable);
  new AsyncThread(urlDrawable).execute(imgKey, imgUrl);
  return urlDrawable;
 }
 
 private class AsyncThread extends AsyncTask<String, Integer, Drawable> {
  private String imgKey;
  private URLDrawable _drawable;
 
  public AsyncThread(URLDrawable drawable){
   _drawable = drawable;
  }
 
  @Override
  protected Drawable doInBackground(String... strings) {
   imgKey = strings[0];
   InputStream inps = NetWork.getInputStream(strings[1]);
   if(inps == null) return _drawable;
 
   FileUtil.saveFile(imgKey, inps);
   Drawable drawable = Drawable.createFromPath(imgKey);
   return drawable;
  }
 
  public void onProgressUpdate(Integer... value) {
 
  }
 
  @Override
  protected void onPostExecute(Drawable result) {
   _drawable.setDrawable(result);
   _htmlText.setText(_htmlText.getText());
  }
 }
 
 public class URLDrawable extends BitmapDrawable {
 
  private Drawable drawable;
 
  public URLDrawable(Drawable defaultDraw){
   setDrawable(defaultDraw);
  }
 
  private void setDrawable(Drawable ndrawable){
   drawable = ndrawable;
   drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable
     .getIntrinsicHeight());
   setBounds(0, 0, drawable.getIntrinsicWidth(), drawable
     .getIntrinsicHeight());
  }
 
  @Override
  public void draw(Canvas canvas) {
   drawable.draw(canvas);
  }
 }
}