我的Android案例签到日历

2015年的Android案例之旅

案例八：签到日历

知识点：

GridView的使用SQLite的使用

涉及文件：

res->layout->activity_main.xml 主布局文件res->layout->date.xml 布局文件src->db->DBHelper.java java文件src->db->SignDAO.java java文件src->activity->MainActivity.java java文件

activity_main.xml

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01.<!-- 线性布局 -->

02.<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

03.android:layout_height="match_parent"

04.android:layout_width="match_parent"

05.android:orientation="vertical">

06.<!-- 文本控件

07.显示当前月份 -->

08.<TextView

09.android:id="@+id/show"

10.android:gravity="center"

11.android:layout_width="match_parent"

12.android:layout_height="wrap_content"

13.android:text="月份"/>

14.<!-- 网格视图

15.-->

16.<GridView

17.android:id="@+id/myDate"

18.android:layout_width="match_parent"

19.android:layout_height="355dp"

20.android:numColumns="7"></GridView>

21.<Button

22.android:id="@+id/sign"

23.android:layout_width="match_parent"

24.android:layout_height="wrap_content"

25.android:text="签到"/>

26.</LinearLayout>

date.xml

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01.<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

02.android:layout_width="match_parent"

03.android:layout_height="match_parent"

04.android:orientation="vertical">

05.

06.<TextView

07.android:id="@+id/txtWeekDateMB"

08.android:layout_width="wrap_content"

09.android:layout_height="wrap_content"

10.android:layout_marginLeft="10dp"

11.android:layout_marginTop="10dp"

12.android:visibility="gone" />

13.

14.<TextView

15.android:id="@+id/txtDayDateMB"

16.android:layout_width="wrap_content"

17.android:layout_height="wrap_content"

18.android:layout_marginLeft="10dp"

19.android:layout_marginTop="10dp" />

20.</LinearLayout>

MainActivity.java

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001.public class MainActivity extends Activity {

002.//Log标签

003.private static final String TAG = "SIGN";

004.//声明对象

005.private Button sign;

006.private TextView show;

007.private GridView myDate;

008.//获取本地时间

009.Time nowTime = new Time();

010.//一个月内的天数

011.private int dayMaxNum;

012.private int year,month,day,ym;

013.private SignDAO sdao;

014.//查询结果

015.private List<String> list = new ArrayList<String>();

016.private ArrayList<HashMap<String, Object>> sinalist,alisttmp;

017.@SuppressLint("NewApi")

018.@Override

019.protected void onCreate(Bundle savedInstanceState) {

020.super.onCreate(savedInstanceState);

021.setContentView(R.layout.activity_main);

022.Log.i(TAG, "SIGN is onCreate");

023.

024.//初始化对象

025.init();

026.//初始化数据库信息

027.initdata();

028.

029.myDate.setOnItemClickListener(new OnItemClickListener(){

030.

031.@Override

032.public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,

033.long arg3) {

034.//判断是否已经签到 从服务器获取签到信息

035.//模拟从本地数据库获取信息

036.if(day==arg2+1)//只能当天签到

037.{

038.sinalist = sdao.findSinInfo("zhangsan",year+"-"+month+"-"+(arg2+1),"0");

039.if(sinalist.size()>0)

040.{

041.Toast.makeText(getApplicationContext(), "已经签过到不能重复签到", 200).show();

042.Log.d("", "已签到");

043.}

044.else

045.{

046.//在数据库插入一条数据

047.sdao.insertSinInfo("zhangsan", "张三", year+"-"+month+"-"+(arg2+1),year+""+month);

048.initdata();

049.}

050.}

051.

052.}

053.});

054.}

055.

056./**

057.* @param   初始化对象

058.*/

059.private void init(){

060.sign = (Button)this.findViewById(R.id.sign);

061.show = (TextView)this.findViewById(R.id.show);

062.myDate = (GridView)this.findViewById(R.id.myDate);

063.//取本地时间（时间应该从服务器获取）

064.nowTime.setToNow();

065.year = nowTime.year;

066.month = nowTime.month+1;

067.day = nowTime.monthDay;

068.show.setText(year+"-"+month+"-"+day);

069.}

070.

071./**

072.* @param   初始化数据库信息

073.*/

074.private void initdata(){

075.sdao = new SignDAO(MainActivity.this);

076.sdao.open();

077.sinalist = sdao.findSinInfo("zhangsan","",year+""+month);//查询当月已签到的日期

078.list.clear();

079.dayMaxNum = getCurrentMonthDay();

080.for(int i=0;i<dayMaxNum;i++)

081.{

082.list.add(i, i+1+"");

083.}

084.myDate.setSelector(new ColorDrawable(Color.TRANSPARENT));

085.myDate.setAdapter(new getDayNumAdapter(getApplicationContext()));

086.}

087.

088.class getDayNumAdapter extends BaseAdapter{

089.

090.Context c;

091.public getDayNumAdapter(Context c)

092.{

093.this.c = c;

094.}

095.

096.@Override

097.public int getCount() {

098.return list.size();

099.}

100.

101.@Override

102.public Object getItem(int position) {

103.return list.get(position);

104.}

105.

106.@Override

107.public long getItemId(int arg0) {

108.return 0;

109.}

110.

111.@Override

112.public View getView(int position, View convertView, ViewGroup parent) {

113.View v = LinearLayout.inflate(c, R.layout.date, null);

114.TextView txtWeek = (TextView)v.findViewById(R.id.txtWeekDateMB);

115.TextView txtDay = (TextView)v.findViewById(R.id.txtDayDateMB);

116.switch (position)

117.{

118.case 0:

119.txtWeek.setText("一");

120.break;

121.case 1:

122.txtWeek.setText("二");

123.break;

124.case 2:

125.txtWeek.setText("三");

126.break;

127.case 3:

128.txtWeek.setText("四");

129.break;

130.case 4:

131.txtWeek.setText("五");

132.break;

133.case 5:

134.txtWeek.setText("六");

135.break;

136.case 6:

137.txtWeek.setText("日");

138.break;

139.}

140.if(position<7)

141.{

142.txtWeek.setVisibility(View.VISIBLE);

143.}

144.int lstDay = Integer.parseInt(list.get(position));

145.//标记当前日期

146.if(day==lstDay)

147.{

148.txtDay.setText(list.get(position).toString());

149.txtDay.setTextColor(Color.RED);

150.}else

151.txtDay.setText(list.get(position).toString());

152.//标记已签到后的背景

153.for(int i=0;i<sinalist.size();i++)

154.{

155.String nowdate = sinalist.get(i).get("sindate").toString();

156.String[] nowdatearr = nowdate.split("-");

157.if(lstDay==Integer.parseInt(nowdatearr[2])){

158.txtDay.setBackgroundColor(Color.BLUE);

159.++ym;

160.}

161.sign.setText("已经签到天数:"+ym);

162.}

163.return v;

164.}

165.

166.}

167.

168.

169.//获取当月的 天数

170.public  int getCurrentMonthDay() { 

171.Calendar a = Calendar.getInstance(); 

172.a.set(Calendar.DATE, 1); 

173.a.roll(Calendar.DATE, -1); 

174.int maxDate = a.get(Calendar.DATE); 

175.return maxDate; 

176.}

177.

178.

179.

180.

181.}

DBHelper.java

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01.public class DBHelper extends SQLiteOpenHelper {

02.

03.public DBHelper(Context context) {

04.super(context, "sign.db", null, 1);

05.}

06.

07./**

08.* @param   创建表

09.*/

10.@Override

11.public void onCreate(SQLiteDatabase db) {

12.String sql="create table sinTB(" +

13."sin_id integer primary key autoincrement," +

14."userid varchar(20)," +

15."usernmae varchar(20)," +

16."sindate varchar(20)," +

17."yearmonth varchar(20)," +

18."nowdate integer" +

19.")";

20.db.execSQL(sql);

21.}

22.

23./**

24.* @param   数据库版本更新时，会调用此方法

25.*/

26.@Override

27.public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

28.

29.}

30.

31.}

SignDAO.java

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01.public class SignDAO {

02.//声明对象

03.Context context;

04.SQLiteDatabase db;

05.DBHelper dbHelper;

06.

07.public SignDAO(Context context){

08.this.context = context;

09.}

10.

11./**

12.* @param 打开数据库连接

13.*/

14.public boolean open(){

15.dbHelper = new DBHelper(context);

16.db = dbHelper.getWritableDatabase();

17.if(db == null){

18.return false;

19.}

20.return true;

21.}

22.

23./**

24.* @param   关闭连接

25.*/

26.public void close(){

27.dbHelper.close();

28.}

29.

30./**

31.* @param   插入信息

32.* @param uid

33.* @param name

34.* @param date

35.* @param ym

36.*/

37.public void insertSinInfo(String uid,String name,String date,String month){

38.String sql="insert into sinTB(userid,usernmae,sindate,yearmonth,nowdate) values(?,?,?,?,?)";

39.db.execSQL(sql,new Object[]{uid,name,date,month,System.currentTimeMillis()});

40.}

41.

42./**

43.* @param   查询信息

44.* @param uid

45.* @param date

46.* @param ym

47.* @return

48.*/

49.public ArrayList<HashMap<String, Object>> findSinInfo(String uid,String date,String month){

50.ArrayList<HashMap<String,Object>> alist = new ArrayList<HashMap<String,Object>>();

51.alist.clear();

52.HashMap<String, Object> rowMap;

53.String sql;

54.try{

55.if("0".equals(month))

56.{

57.sql="select * from sinTB where userid=‘"+uid+"‘ and sindate=‘"+date+"‘";

58.}

59.else

60.{

61.sql="select * from sinTB where userid=‘"+uid+"‘ and yearmonth=‘"+month+"‘";

62.}

63.Cursor cur = db.rawQuery(sql, null);

64.cur.moveToFirst();

65.while(cur.moveToNext()){

66.rowMap = new HashMap<String, Object>();

67.rowMap.put("sin_id", cur.getInt(cur.getColumnIndex("sin_id")));

68.rowMap.put("userid", cur.getString(cur.getColumnIndex("userid")));

69.rowMap.put("usernmae", cur.getString(cur.getColumnIndex("usernmae")));

70.rowMap.put("sindate", cur.getString(cur.getColumnIndex("sindate")));

71.long aa = cur.getLong(cur.getColumnIndex("nowdate"));

72.SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

73.Date now = new Date(aa);

74.String date1 = format.format(now);

75.rowMap.put("nowdate", date1);

76.Log.e("", cur.getString(cur.getColumnIndex("sindate")));

77.alist.add(rowMap);

78.}

79.return alist;

80.}catch(Exception e){

81.return alist;

82.}

83.

84.}

85.}

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