TextShow.java

package cn.fanfan.common;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.xml.sax.XMLReader;

import cn.fanfan.topic.imageload.FileUtils;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Environment;
import android.text.Editable;
import android.text.Html;
import android.text.Html.ImageGetter;
import android.text.Html.TagHandler;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.text.Spanned;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

public class TextShow{
	private int tag=0;
	private ArrayList<String> urlSpans;
	public TextShow(String text, TextView textView, Context context,float screenW) {
		// TODO Auto-generated constructor stub
		urlSpans = new ArrayList<String>();
		Pattern p = Pattern.compile("<img[^>]+src\\s*=\\s*['\"]([^'\"]+)['\"][^>]*>");
		Matcher m = p.matcher(text);
		while(m.find()){
			text = text.replace(m.group(), "^^#"+m.group()+"<br>");
		}
		String[] sourceStrArray = text.split("\\^\\^#");
		for (int i = 0; i < sourceStrArray.length; i++) {
			AsyncShow asyncShow = new AsyncShow(sourceStrArray[i]+"<br>", textView, context, screenW);
			asyncShow.execute();
		}
	}
	class AsyncShow extends AsyncTask<String, Integer, Spanned> {

		private String text;
		private TextView textView;
		private FileUtils fileUtils;
		private float screenW;
		private  Context context;
		private int start = 0;
		
		

		public AsyncShow(String text, TextView textView, Context context,float screenW) {
			// TODO Auto-generated constructor stub
			this.screenW = screenW;
			this.text = text;
			this.textView = textView;
			this.context = context;			
			fileUtils = new FileUtils(context);
			
		}

		@Override
		protected void onPreExecute() {
			// TODO Auto-generated method stub
			super.onPreExecute();
		}

		@Override
		protected Spanned doInBackground(String... arg0) {
			// TODO Auto-generated method stub
			final Spanned spanned;
		
			ImageGetter imgGetter = new Html.ImageGetter() {
				@SuppressWarnings("deprecation")
				@Override
				public Drawable getDrawable(String source) {
					Drawable d = null;
					Bitmap bm = null;
					urlSpans.add(source);
					String url = source.replaceAll("[^\\w]", "");
					String imageurl = Environment
							.getExternalStorageDirectory()
							+ "/fanfantopic/" + url;
					
					try {
						if (!fileUtils.isFileExists(url)
								|| fileUtils.getFileSize(url) == 0) {
							InputStream is = null;
							HttpResponse httpResponse = new DefaultHttpClient()
									.execute(new HttpGet(source));
							if (httpResponse.getStatusLine().getStatusCode() == 200) {
								is = httpResponse.getEntity()
								.getContent();
							} else {
	                           System.out.println("���粻��");
							}
									
							bm = BitmapFactory.decodeStream(is);
							fileUtils.saveBitmap(source.replaceAll("[^\\w]", ""),
									bm);
							is.close();
						} else {
							//ImageGet imageGet = new ImageGet();
							bm = BitmapFactory.decodeFile(imageurl);
							//bm = imageGet.getBitmap();
						}
						
						d = new BitmapDrawable(bm);
						if (bm.getWidth() >= screenW-100) {
							float so = ((float)(bm.getHeight())/bm.getWidth());
							float h =  (screenW-100)*so;
							d.setBounds(0, 0,(int)(screenW-100),(int)h);
						} else {
							start =  (int) (screenW - bm.getWidth())/2;
							d.setBounds(start, 0,bm.getWidth()+start,bm.getHeight());
						}
						

					} catch (Exception e) {
						e.printStackTrace();
					}
					return d;
				}
			};
			spanned = Html.fromHtml(text, imgGetter, new ImgTaghand());
			return spanned;
		}

		@Override
		protected void onPostExecute(Spanned result) {
			// TODO Auto-generated method stub
			super.onPostExecute(result);
			textView.append(result);;
			textView.setClickable(true);
			textView.setMovementMethod(LinkMovementMethod.getInstance());
			
		}
		

		    private  class ImgTaghand implements TagHandler {


			@Override
			public void handleTag(boolean arg0, String arg1, Editable arg2,
					XMLReader arg3) {
				// TODO Auto-generated method stub
				if (arg1.equalsIgnoreCase("img")) {               
					arg2.setSpan(new GameSpan(tag), arg2.length()-1, arg2.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
					tag++;
				}
				

			}
			private class GameSpan extends ClickableSpan implements OnClickListener {  
				private int tag;
	            public GameSpan(int tag) {
					// TODO Auto-generated constructor stub
	            	this.tag = tag;
				}
		        @Override  
		        public void onClick(View v) {  
		            // ��תijҳ��   
		        	Intent intent = new Intent();
		        	intent.putStringArrayListExtra("images", urlSpans);
		        	intent.putExtra("tag",tag);
		        	intent.setClass(context, ShowPic.class);
		        	context.startActivity(intent);
		        }  
		    }
		}
	}

}