Android编程开发实现TextView显示表情图像和文字的方法

<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="fill_parent"
  android:layout_height="wrap_content"
  android:layout_margin="10dp"
  android:background="#FFF" />
</RelativeLayout>

package com.example.textview3;
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 {
 public int getResourceId(String name) {
  try {
   // 根据资源的ID的变量名获得Field的对象,使用反射机制来实现的
   Field field = R.drawable.class.getField(name);
   // 取得并返回资源的id的字段(静态变量)的值，使用反射机制
   return Integer.parseInt(field.get(null).toString());
  } catch (Exception e) {
   // TODO: handle exception
  }
  return 0;
 }
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  TextView textView = (TextView) this.findViewById(R.id.textview);
  textView.setTextColor(Color.BLACK);
  textView.setBackgroundColor(Color.WHITE);
  textView.setTextSize(20);// 设置字体的大小
  String html = "图像1<img src='image1'/>图像2<img src='image2'/>图像3<img src='image3'/><p>";
  html += "图像4<a href='http://www.baidu.com'><img src='image4'></a>图像5<img src='image5'/>";
  CharSequence charSequence = Html.fromHtml(html, new ImageGetter() {
   @Override
   public Drawable getDrawable(String source) {
    // TODO Auto-generated method stub
    // 获得系统资源的信息，比如图片信息
    Drawable drawable = getResources().getDrawable(
      getResourceId(source));
    // 第三个图片文件按照50%的比例进行压缩
    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) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }
}