安卓课程十三 TextView显示表情图像和文字

import java.lang.reflect.Field;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.text.Html;
import android.text.Html.ImageGetter;
import android.text.method.LinkMovementMethod;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		TextView textView = (TextView) findViewById(R.id.textview);
        textView.setTextColor(Color.BLACK);
        textView.setBackgroundColor(Color.WHITE);
        textView.setTextSize(20);
        
        String html = "图像1<img  src='image1'  />";
        	   html += "图像2<img  src='image2' />";
        	   html += "图像3<a href='http://www.baidu.com' ><img  src='image3' /></a>";        	 
        	   
        	   CharSequence charSequence = Html.fromHtml(html, new ImageGetter()
               {
                   public Drawable getDrawable(String source)
                   {
                       //转载图像资源
                       Drawable drawable = getResources().getDrawable(getResourceId(source));
                       if (source.equals("image3"))
                           drawable.setBounds(0, 0, drawable.getIntrinsicWidth() / 2,drawable.getIntrinsicHeight() / 2);
                       else
                           drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight() );
                       return drawable;

                   }
               }, null);
               
               textView.setText(charSequence);
               textView.setMovementMethod(LinkMovementMethod.getInstance());

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	public int getResourceId(String name)//name参数标识R.drawable中的图像文件名
    {
        try
        {
            Field field = R.drawable.class.getField(name);//根据资源ID的变量(也就是资源的文件名)名获取Field对象
            return Integer.parseInt(field.get(null).toString());//取得并返回资源ID字段(静态变量)的值
        }
        catch (Exception e)
        {
        }
        return 0;
    }

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >
    <TextView
        android:id="@+id/textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="" />
</RelativeLayout>