android 在EditText中显示表情图片

public class MainActivity extends Activity 
{
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        EditText editText=(EditText) this.findViewById(R.id.edittext);
        
        //src中的图片的名字必须在drawable中存在该图片
        String html="<img src='sleep'>";
        
        CharSequence text=Html.fromHtml(html, new ImageGetter() 
        {
            public Drawable getDrawable(String source)
            {
                Drawable drawable=getResources().getDrawable(getImageID(source));
                drawable.setBounds(0, 0, drawable.getIntrinsicWidth()/3, drawable.getIntrinsicHeight()/3);
                return drawable;
            }
        }, null);

        editText.setText(text);
    }

    /*
     * 
     * 获取图片资源的ID
     */
    public int getImageID(String name) 
    {
        
        try 
        {
            Field field=R.drawable.class.getField(name);
            return Integer.valueOf(field.getInt(name));
        } catch (Exception e) 
        {
            e.printStackTrace();
        }
        return 0;
    }

}