Android之UI学习篇二：TextVeiw显示表情和跑马灯效果

public class Android_TextviewActivity extends Activity {
	private TextView textView1;
	private TextView textView2;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        /*
         * 实现在TextView中显示表情图片和文本
         * */
        textView1=(TextView)findViewById(R.id.textview1);
        String html2="图像1<img src='image1'>图像2<img src='image2'>";
        html2+="图像3<img src='image3'>图像4<a href='http://www.baidu.com'>

<img src='image4'></a>";
        html2+="图像5<img src='image5'>";
        CharSequence charSequence2=Html.fromHtml(html2, 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{//原大小输出
					drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
				}
				return drawable;
			}
		}, null);
        textView1.setText(charSequence2);
        textView1.setMovementMethod(LinkMovementMethod.getInstance());
        
        textView2=(TextView)findViewById(R.id.textview6);
        String html3="诗圣杜甫his的合法ids分三个收视率凉快实得分是的发生的！";
        textView2.setText(html3);
        textView2.setMovementMethod(LinkMovementMethod.getInstance());
    }
    
    public int getResourceId(String name){
    	Field field;
		try {
			//根据资源ID的变量名称来获得Field的对象，使用反射机制来实现的
			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 (SecurityException e) {
			e.printStackTrace();
		} catch (NoSuchFieldException e) {
			e.printStackTrace();
		}catch (Exception e) {
			e.printStackTrace();
		}
    	return 0;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
     
     <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textview1"
        android:layout_margin="10dp"
        android:background="#FFF"/>
     
     <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textview2"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:focusable="true"
        android:background="#FFFFFF"
        android:textColor="#000"
        android:textSize="20dp"
        android:layout_margin="10dp"
        android:padding="10dp"
        android:focusableInTouchMode="true"
        android:singleLine="true"/>

</LinearLayout>