我有一个android应用程序，使用SQLite数据库来存储数据。其中一个字段是match_date，包含日期和时间。
我想要的是创建通知，包括团队名称和日期后比较当前日期与存储在数据库中的日期，如果他们匹配通知必须出现。
应用程序工作完美，但没有得到任何通知，所以我的错误在哪里，如何解决这个错误?
我很感激你的帮助。
这是我的数据库表
CREATE TABLE [match_list] (
[_id] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
[stad_name] VARCHAR(50) NOT NULL,
[team1] VARCHAR(50) NOT NULL,
[team2] VARCHAR(50) NOT NULL,
[stage] varchar(50) NOT NULL,
[match_date] DATETIME NOT NULL,
[flags1] CHAR(255),
[flags2] CHAR(255),
[group_team] CHAR(1));
FirstActivity.java :
public class FirstActivity extends Activity {
TextView txtDate;
private SQLiteDatabase database;
private ExternalDbOpenHelper extDB;
private static final String DB_NAME = "world_cup.db";
// *****Tables name**************************//
private static final String TABLE_NAME = "match_list";
// *****Tbale name******************************
public static final String PLACE_ID = "_id";
public static final String STAD_NAME = "stad_name";
public static final String TEAM1 = "team1";
public static final String TEAM2 = "team2";
public static final String MATCH_DATE = "match_date";
public static final String FLAG1 = "flags1";
public static final String FLAG2 = "flags2";
public static final String[] ALL_KEYS = new String[] { PLACE_ID, STAD_NAME,
TEAM1, TEAM2, MATCH_DATE, FLAG1, FLAG2, };
// *****Tbale name******************************
ItemDetails listdetail;
Cursor c;
private static final int myNotificationId = 1;
///////////////////////
long diffSeconds;
long diffMinutes;
long diffHours;
long diffDays;
///////////////////////
//for the alarm amanager and the notification
public static int eventID = 1;
Date d1 = new Date();
SimpleDateFormat format;
//////////////////////////////////////////////
// private DatabaseHelper dbHelper = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
getDiffDate();
extDB = new ExternalDbOpenHelper(this, DB_NAME);
database = extDB.openDataBase();
showNotification();
Log.e("inside the onCreate", "inside onCreate");
}
public void listTeams(View v) {
Intent in = new Intent(getBaseContext(), MainActivity.class);
startActivity(in);
}
public void listGroups(View v) {
Intent in = new Intent(getBaseContext(), GroupList.class);
startActivity(in);
}
public void DisplaySched(View v) {
Intent in = new Intent(getBaseContext(), MatchScheduleList.class);
startActivity(in);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.first, menu);
return true;
}
public void getDiffDate() {
String dateStop = "06/12/2014 23:00:00";
// HH converts hour in 24 hours format (0-23), day calculation
format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
d1 = new Date();
Date d2 = null;
try {
d2 = format.parse(dateStop);
// in milliseconds
long diff = d2.getTime() - d1.getTime();
long diffSeconds = diff / 1000 % 60;
long diffMinutes = diff / (60 * 1000) % 60;
long diffHours = diff / (60 * 60 * 1000) % 24;
long diffDays = diff / (24 * 60 * 60 * 1000);
System.out.print(diffDays + " days, ");
System.out.print(diffHours + " hours, ");
System.out.print(diffMinutes + " minutes, ");
System.out.print(diffSeconds + " seconds.");
txtDate = (TextView) findViewById(R.id.txtDifDate);
String resultDate = diffDays + "days " + diffHours + "Hours "
+ diffMinutes + "Min " + diffSeconds + "S";
txtDate.setText(resultDate);
} catch (Exception e) {
e.printStackTrace();
}
}
public Cursor getAllRows(PendingIntent notificationIntent) {
String where = null;
c = database.query(true, TABLE_NAME, ALL_KEYS, where, null, null, null,
null, null);
if (c != null) {
c.moveToFirst();
while (!c.isAfterLast()) {
listdetail = new ItemDetails();
listdetail.setTeam1(c.getString(c.getColumnIndex("team1")));
listdetail.setTeam2(c.getString(c.getColumnIndex("team2")));
listdetail.setDate_match(c.getString(c
.getColumnIndex("match_date")));
// if the pick up date from the database is equal to the current date the notification will pop up
long i = (int) (new Date().getTime()/1000);
//// from the internet
int index = c.getColumnIndex("match_date");
long time = c.getLong(index);
////////
Log.e("inside the Shownotification", "index is" + index);
if(time == i){
Log.e("inside the Shownotification", "time is" + time);
NotificationCompat.Builder builder = new Builder(
getApplicationContext());
Notification notification = builder
.setSmallIcon(R.drawable.fifa_2014_4)
.setContentTitle("Up Comming Match")
.setContentText(
c.getString(c.getColumnIndex("match_date"))
+ (c.getColumnIndex("team1"))
+ (c.getColumnIndex("team2"))).build();
displayNotification(notification);
}
c.moveToNext();
}
}
return c;
}
// for the notification
private PendingIntent preparePendingIntent() {
Intent intent = new Intent(getApplicationContext(), FirstActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
PendingIntent pendingIntent = PendingIntent.getActivity(
getApplicationContext(), 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
Log.e("inside the preparePendingIntent", "inside preparePendingIntent");
return pendingIntent;
}
private void showNotification() {
PendingIntent notificationIntent = preparePendingIntent();
getAllRows(notificationIntent);
c.moveToFirst();
}
private void displayNotification(Notification notification) {
Log.e("inside the displayNotification", "inside displayNotification");
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(myNotificationId, notification);
}
}
你比较日期的方式是错误的。
在比较i和time之前，注销它们的值-我认为它们不会相等。
不妨看看这个问题，它展示了在java中比较日期的更好方法:
- 如何在Java中比较日期?
为什么比较的方式是错误的?
- 首先，你现在比较的是毫秒级
- 其次，你正在丢失信息铸造到
(int)
尝试和跟踪这样的问题的一个好方法是首先使用静态数据从任何if..then块外部创建Notification。一旦你能做到这一点，那么你就知道你的Notification技能是好的。
您将能够找出是否通知的东西是错误的，或DB的东西。