1 public class MainActivity extends Activity {
2 private Handler handler;
3 private String html;
4 private TextView tv;
5 private ProgressBar bar;
6 @Override
7 protected void onCreate(Bundle savedInstanceState) {
8 super.onCreate(savedInstanceState);
9 setContentView(R.layout.activity_main);
10 // 网上找的html数据
11 html = "<html><head><title>TextView使用HTML</title></head><body><p><strong>强调</strong></p><p><em>斜体</em></p>"
12 + "<p><a href=\"http://www.jb51.net">超链接HTML入门</a>学习HTML!</p><p><font color=\"#aabb00\">颜色1"
13 + "</p><p><font color=\"#00bbaa\">颜色2</p><h1>标题1</h1><h3>标题2</h3><h6>标题3</h6><p>大于>小于<</p><p>"
14 + "下面是网络图片</p><img src=\"http://www.jb51.net/1207.jpg\"/></body>"
15 + "下面是网络图片</p><img src=\"http://www.jb51.net/207.jpg\"/></body></html>";
16 tv = (TextView) this.findViewById(R.id.id);
17 bar = (ProgressBar) this.findViewById(R.id.id_bar);
18 tv.setMovementMethod(ScrollingMovementMethod.getInstance());// 滚动
19 handler = new Handler() {
20 @Override
21 public void handleMessage(Message msg) {
22 // TODO Auto-generated method stub
23 if (msg.what == 0x101) {
24 bar.setVisibility(View.GONE);
25 tv.setText((CharSequence) msg.obj);
26 }
27 super.handleMessage(msg);
28 }
29 };
30 // 因为从网上下载图片是耗时操作 所以要开启新线程
31 Thread t = new Thread(new Runnable() {
32 Message msg = Message.obtain();
33 @Override
34 public void run() {
35 // TODO Auto-generated method stub
36 bar.setVisibility(View.VISIBLE);
37 /**
38 * 要实现图片的显示需要使用Html.fromHtml的一个重构方法：public static Spanned
39 * fromHtml (String source, Html.ImageGetterimageGetter,
40 * Html.TagHandler
41 * tagHandler)其中Html.ImageGetter是一个接口，我们要实现此接口，在它的getDrawable
42 * (String source)方法中返回图片的Drawable对象才可以。
43 */
44 ImageGetter imageGetter = new ImageGetter() {
45 @Override
46 public Drawable getDrawable(String source) {
47 // TODO Auto-generated method stub
48 URL url;
49 Drawable drawable = null;
50 try {
51 url = new URL(source);
52 drawable = Drawable.createFromStream(
53 url.openStream(), null);
54 drawable.setBounds(0, 0,
55 drawable.getIntrinsicWidth(),
56 drawable.getIntrinsicHeight());
57 } catch (MalformedURLException e) {
58 // TODO Auto-generated catch block
59 e.printStackTrace();
60 } catch (IOException e) {
61 // TODO Auto-generated catch block
62 e.printStackTrace();
63 }
64 return drawable;
65 }
66 };
67 CharSequence test = Html.fromHtml(html, imageGetter, null);
68 msg.what = 0x101;
69 msg.obj = test;
70 handler.sendMessage(msg);
71 }
72 });
73 t.start();
74 }
75 @Override
76 public boolean onCreateOptionsMenu(Menu menu) {
77 // Inflate the menu; this adds items to the action bar if it is present.
78 getMenuInflater().inflate(R.menu.main, menu);
79 return true;
80 }
81 }
