Android 多线程小结

1、启动欢迎界面

 1 @Override
 2 protected void onCreate(Bundle savedInstanceState) {
 3     // TODO Auto-generated method stub
 4     super.onCreate(savedInstanceState);
 5     setContentView(R.layout.welcome);
 6     new Handler().postDelayed(r, 1000);// 1秒后关闭，并跳转到主页面
 7 }
 8
 9 Runnable r = new Runnable() {
10
11     @Override
12     public void run() {
13     // TODO Auto-generated method stub
14     Intent intent = new Intent();
15     intent.setClass(WelcomeActivity.this, MainActivity.class);
16     startActivity(intent);
17     finish();
18     }
19 };

2、远程数据库查询

 1 // 主线程启动数据库查询线程
 2         Thread t = new Thread(QueryDB);
 3         t.start();
 4         // 等待子线程结束
 5         try {
 6             ((Thread) t).join();
 7         } catch (InterruptedException e) {
 8             e.printStackTrace();
 9         }
10         listview.setAdapter(adapter);
11         listview.setVisibility(View.VISIBLE);
12         listview.setItemsCanFocus(false);
13
14
15     // 数据库查询子线程，共享数据
16     Runnable QueryDB = new Runnable()
17     {
18         @Override
19         public void run()
20         {
21             // 此处写访问  webservice 代码
22             List<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
23             list = dbUtil.getAllInfo();
24             // ListItem
25             adapter = new SimpleAdapter(
26                     SpeLineListActivity.this,
27                     list,
28                     R.layout.v1_speline_item,
29                     new String[] { "Cno", "Cname", "Cnum" },
30                     new int[] { R.id.txt_company_name, R.id.txt_sl_line, R.id.txt_sl_contact }
31                     );
32
33         }
34     };

3、多线程查询

1 List<Thread> tList = new ArrayList<Thread>();
2 for (int i = 0; i < tList.size(); i++) {
3 try {
4     tList.get(i).join();
5     } catch (InterruptedException e) {
6     e.printStackTrace();
7     }
8 }