移动课堂点名APP
一、源代码地址:https://github.com/WreckBear/final
二、对程序涉及到的以下几个类进行简要说明:
CallNameActivity:显示全局点名的界面。
CallNameAll:负责点名选择界面。
CallNameRdmActivity:负责随机点名界面。
CountActivity:负责统计界面。
ImportActivity:负责导入文件的界面。
MainActivity:主界面。
MoreActivity:更多界面。
MyDBOpenHelper:关于和数据库交互的类。
MyInfoActivity:我的信息页。
PersonDao:关于数据库请求类。
SplashActivity:进入Splash界面。
三、部分代码
贴出统计页面的源码,简要说明下:
1 public class CountActivity extends Activity {
2 ListView listView;
3 TextView text;
4 LinearLayout linearLayout;
5
6 @Override
7 protected void onCreate(Bundle savedInstanceState) {
8 super.onCreate(savedInstanceState);
9 setContentView(R.layout.count_layout);
10
11 text = (TextView) findViewById(R.id.toast);
12 linearLayout = (LinearLayout) findViewById(R.id.instudct);
13 listView = (ListView) findViewById(R.id.count);
14 }
15
16 @Override
17 protected void onStart() {
18 super.onStart();
19 if (tabIsExist("kecheng1")) {
20 linearLayout.setVisibility(View.VISIBLE);
21 listView.setVisibility(View.VISIBLE);
22 text.setVisibility(View.GONE);
23 count();
24 } else {
25 linearLayout.setVisibility(View.GONE);
26 listView.setVisibility(View.GONE);
27 text.setVisibility(View.VISIBLE);
28 }
29 }
30
31 public boolean tabIsExist(String tabName) {
32 SQLiteDatabase dbInfo = new MyDBOpenHelper(this).getReadableDatabase();
33 boolean result = false;
34 if (tabName == null) {
35 return false;
36 }
37 Cursor cursor = null;
38 try {
39 String sql = "select count(*) as c from sqlite_master where type =‘table‘ and name =‘"
40 + tabName.trim() + "‘ ";
41 cursor = dbInfo.rawQuery(sql, null);
42 if (cursor.moveToNext()) {
43 int count = cursor.getInt(0);
44 if (count > 0) {
45 result = true;
46 }
47 }
48 } catch (Exception e) {
49 // TODO: handle exception
50 } finally {
51 dbInfo.close();
52 }
53 return result;
54 }
55
56 private void count() {
57 // 存放数据用
58 List<HashMap<String, String>> all = new ArrayList<HashMap<String, String>>();
59 PersonDao per = new PersonDao(this);
60 List<String[]> tmpList = per.getAllPerson();
61 for (String[] tmpAll : tmpList) {
62 HashMap hash = new HashMap<String, String>();
63 hash.put("学号", tmpAll[0]);
64 hash.put("班级", tmpAll[3]);
65 hash.put("姓名", tmpAll[1]);
66 hash.put("缺勤", tmpAll[4]);
67 all.add(hash);
68 }
69 SimpleAdapter simple = new SimpleAdapter(this, all, R.layout.liststyle,
70 new String[] { "学号", "班级", "姓名", "缺勤" }, new int[] { R.id.t1,
71 R.id.t2, R.id.t3, R.id.t4 });
72 listView.setAdapter(simple);
73
74 }
75 }
原文:http://www.cnblogs.com/liuxu8257/p/4576007.html