Android TextView解析HTML内容

package com.example.textimage;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LevelListDrawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Html;
import android.text.Spanned;
import android.view.Gravity;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {

private String html = "欧盟<br><img src=\"http://y1.ifengimg.com/2014/03/20/09045132.jpg\"><br/>"
+ "乌克兰<br>"
+ "<img src=\"http://y3.ifengimg.com/2014/03/20/11255332.jpg\"><br>俄罗斯<br>"
+ "<img src=\"http://tp4.sinaimg.cn/1794530711/180/5656394191/1\"><br>美国"
+ "<br><img src=\"http://y3.ifengimg.com/2014/03/20/11255332.jpg\">";
private TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

tv = (TextView) findViewById(R.id.textTV);
NetworkImageGetter imageGetter = new NetworkImageGetter();
Spanned spanned = Html.fromHtml(html, imageGetter, null);
// 图片文字居中显示
tv.setGravity(Gravity.CENTER_HORIZONTAL);
tv.setText(spanned);

}

private final class NetworkImageGetter implements Html.ImageGetter {

@Override
public Drawable getDrawable(String source) {
// TODO Auto-generated method stub

LevelListDrawable d = new LevelListDrawable();
new LoadImage().execute(source, d);
return d;
}

}

/**** 异步加载图片 **/
private final class LoadImage extends AsyncTask<Object, Void, Bitmap> {

private LevelListDrawable mDrawable;

@Override
protected Bitmap doInBackground(Object... params) {
String source = (String) params[0];
mDrawable = (LevelListDrawable) params[1];

try {
InputStream is = new URL(source).openStream();
return BitmapFactory.decodeStream(is);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

@Override
protected void onPostExecute(Bitmap bitmap) {

if (bitmap != null) {
BitmapDrawable d = new BitmapDrawable(bitmap);
mDrawable.addLevel(1, 1, d);
mDrawable
.setBounds(0, 0, bitmap.getWidth(), bitmap.getHeight());
// mDrawable.setBounds(0, 0,
// getWindowManager().getDefaultDisplay().getWidth(),
// bitmap.getHeight());
mDrawable.setLevel(1);
CharSequence t = tv.getText();
tv.setText(t);
}
}
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}