1
這個問題已被問過多次，我想我的情況有點不同。關閉從未明確呼籲數據庫
早些時候 我聲明在類級別我的數據庫對象：
DBAdapter dbHelper;
：
dbHelper = new DBAdapter(this);
我已經關閉了DB在破壞：
@Override
public void onDestroy(){
super.onDestroy();
if (dbHelper != null)
{
dbHelper.close();
}
}
但是，每次寫入數據庫時都會發生錯誤。關閉之後從未明確地調用過數據庫它對數據庫鎖定也有一些例外。
的問題
我有一個異步任務，在此我更新三個表爲其他後每條記錄。 （操作確實很大）但是現在我將DB init的代碼轉換爲我的異步任務。在預執行我初始化數據庫，然後我關閉數據庫在onPostExecute。然而，問題仍然存在，可以解決這個問題呢？下面是我的異步任務的代碼：
private class MagicCall extends AsyncTask<Void, String, String> {
int years;
long secon;
long min;
int hours;
int mon;
int days;
int weeks;
String CONTACT_ID,CONTACT_NAME,CONTACT_IMAGE_URI;
ProgressDialog Asycdialog = new ProgressDialog(LoaderClass.this);
@Override
protected void onPreExecute() {
dbHelper = new DBAdapter(getApplicationContext());
dbHelper.open();
//Init the LoaderDialog
Asycdialog.setMessage("Working");
Asycdialog.getWindow().setGravity(Gravity.CENTER_VERTICAL);
Asycdialog.getWindow().setGravity(Gravity.CENTER_HORIZONTAL);
Asycdialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
Asycdialog.setCancelable(false);
//Dialog Show
Asycdialog.show();
super.onPreExecute();
}
protected void onPostExecute(String result) {
// hide the dialog
dbHelper.close();
Asycdialog.dismiss();
startActivity(new Intent(LoaderClass.this, MainActivity.class));
finish();
super.onPostExecute(result);
}
@Override
protected String doInBackground(Void... args) {
//
// Dear maintainer:
//
// Once you are done trying to 'optimise' this routine,
// and have realized what a terrible mistake that was,
// please increment the following counter as a warning
// to the next guy:
//
// total_hours_wasted_here = 0;
//
int lines = 0;
try{
BufferedReader reader;
if(FLAG ==1){
reader = new BufferedReader(new FileReader("/sdcard/BirthdayReminders/fileone.txt"));
}else{
reader = new BufferedReader(new FileReader("/sdcard/BirthdayReminders/output.txt"));
}
while (reader.readLine() != null) lines++;
reader.close();
}catch(Exception e){
}
dbHelper.NotificationDrop();
int i=0;
File toRead = null;
try{
if(FLAG ==1){
toRead=new File("/sdcard/BirthdayReminders/fileone.txt");
}else{
toRead=new File("/sdcard/BirthdayReminders/output.txt");
}
FileInputStream fis=new FileInputStream(toRead);
Scanner sc=new Scanner(fis);
//read data from file line by line:
String currentLine;
while(sc.hasNextLine()){
currentLine=sc.nextLine();
//now tokenize the currentLine:
StringTokenizer st=new StringTokenizer(currentLine,"=",false);
//put tokens ot currentLine in map
// mapInFile.put(st.nextToken(),st.nextToken());
String dateStr = st.nextToken();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Date date = format.parse(dateStr);
java.sql.Date dx = new java.sql.Date(date.getTime());
Date key = dx;
String dateToInsert = String.valueOf(dx);
// *********
String listStr = st.nextToken();
String cut = listStr.substring(1, listStr.length() - 1);
String[] array = cut.split(",");
CONTACT_ID = (array[0].trim());
CONTACT_NAME = toTitleCase(array[1].trim());
if(array[2].contains(".jp"))
array[2] = array[2].replace(".jp", ".jpg").trim();
CONTACT_IMAGE_URI = (array[2].trim());
if (isCancelled()) {
break;
}
// int k = Sx.size();
String progress = ("" + Character.toUpperCase(CONTACT_NAME.charAt(0)) + CONTACT_NAME.substring(1) + "\n"+i + " of " + lines + " Contacts"); // Progress displayed here.
years = getDiffYear(key); // For years elapsed
secon = seconds(key); // for seconds elapsed
min = seconds(key)/60; // For minutes elapsed
hours = (int) (seconds(key)/60)/60; // For hours elapsed
mon = months(String.valueOf(key)); // for months elapsed
days = daysElapsed(key); // Days elapsed
weeks = daysElapsed(key)/7; // For weeks
//===============================================================================================================
if (dateToInsert.contains("0001-") == true){ //Special Case, we added 0001 to Birthdays Which Have NO Year field.
//===========================================================================================================
dbHelper.insert(dateToInsert, CONTACT_NAME, "","", CONTACT_IMAGE_URI, "", "", "", CONTACT_ID, "", ""); // All other fields will be empty, because we don't have a Year.
int PRIMARY_ID = dbHelper.getPrimaryId();
String FOREIGN_KEY = dbHelper.getHighestID(PRIMARY_ID);
//=====================================================================================================
//In this case we are only interested in fetching the year alert for next birthday of this contact -->
//=====================================================================================================
intCal.yearsToNotify(years, dateToInsert);
int yearsSpecial = intCal.getYearsRegular();
Date dateYearsReg = intCal.getYearsRegDate();
dbHelper.insertNotifications(5, convertDate(dateYearsReg), 0, yearsSpecial,FOREIGN_KEY,PRIMARY_ID);
}
//=========================================================================
//Case when all the Date fields exist and we set up notifications --->
//=========================================================================
else if(dateToInsert != "null" && dateToInsert.contains("0001-") != true){
dbHelper.insert(dateToInsert, CONTACT_NAME, String.valueOf(days), String.valueOf(hours), CONTACT_IMAGE_URI, String.valueOf(min),String.valueOf(mon), String.valueOf(secon), CONTACT_ID, String.valueOf(weeks), String.valueOf(years));
int PRIMARY_ID = dbHelper.getPrimaryId(); // Fetch the PrimaryId (_id) of the above inserted row, its the Foreign key for Notification and SpecialNotifications Table.
String FOREIGN_KEY = dbHelper.getHighestID(PRIMARY_ID); // Same as above, but fetches the Name field of the last inserted row.
//=========================================================================
//**Database Insertions Notifications Table/ SpecialNotifications Table**
//=========================================================================
//=======================================================================================//
//Regular intervals DB Insertions:
//======================================================================================//
//Notification Types:
//1 for months
//2 for weeks
//3 for days
//4 for minutes
//5 for years
//6 for seconds
//7 for hours
//======================================================================================//
//==============================
//For Months
//==============================
intCal.monthsNotify(mon, dateToInsert);
int monSpecial = intCal.getMonthRegular();
Date dateMonReg = intCal.getMonRegDate();
dbHelper.insertNotifications(1, convertDate(dateMonReg), 0, monSpecial,FOREIGN_KEY,PRIMARY_ID);
//===============================
//For Weeks
//===============================
intCal.weeksToNotify(weeks,dateToInsert);
int weekSpecial = intCal.getWeekRegular();
Date dateWeekReg =intCal.getWeekRegDate();
dbHelper.insertNotifications(2, convertDate(dateWeekReg), 0, weekSpecial,FOREIGN_KEY,PRIMARY_ID);
//===============================
//For Days
//===============================
intCal.daysToNotify(days, dateToInsert);
int daysSpecial= intCal.getDaysRegular();
Date dateDaysReg = intCal.getDaysRegDate();
dbHelper.insertNotifications(3, convertDate(dateDaysReg), 0, daysSpecial,FOREIGN_KEY,PRIMARY_ID);
//===============================
//For minutes
//===============================
intCal.minutesToNotify(min,dateToInsert);
long minutesSpecial= intCal.getMinutesRegular();
Date dateMinsReg = intCal.getMinutesRegDate();
dbHelper.insertNotifications(4, convertDate(dateMinsReg), 0,(int) minutesSpecial,FOREIGN_KEY,PRIMARY_ID);
//==============================
//For Years
//==============================
intCal.yearsToNotify(years, dateToInsert);
int yearsSpecial = intCal.getYearsRegular();
Date dateYearsReg = intCal.getYearsRegDate();
dbHelper.insertNotifications(5, convertDate(dateYearsReg), 0, yearsSpecial,FOREIGN_KEY,PRIMARY_ID);
//=============================
//For Seconds
//=============================
intCal.secondsToNotify(secon, dateToInsert);
long secondsSpecial= intCal.getSecondsRegular();
Date dateSecondsReg = intCal.getSecondsRegDate();
dbHelper.insertNotifications(6, convertDate(dateSecondsReg), 0, secondsSpecial,FOREIGN_KEY,PRIMARY_ID);
//=============================
//For Hours
//=============================
intCal.hoursToNotify(hours, dateToInsert);
int hoursSpecial= intCal.getHoursRegular();
Date dateHoursReg= intCal.getHoursRegDate();
dbHelper.insertNotifications(7, convertDate(dateHoursReg), 0, hoursSpecial,FOREIGN_KEY,PRIMARY_ID);
//============================================================================================//
//Special Intervals
//=============================================================================================================//
//Notification Types:
//1 for months
//2 for weeks
//3 for days
//4 for minutes
//5 for years
//6 for seconds
//7 for hours
//For Years
intCal.specialIntervalYears(years, dateToInsert);
int yearsOnceSpecial =intCal.getYearsSpecial();
Date dateYearsSpecial = intCal.getYearsSpDate();
dbHelper.insertSpecialNotifications(5, convertDate(dateYearsSpecial), yearsOnceSpecial,FOREIGN_KEY,PRIMARY_ID);
//For Months
intCal.specialIntervalMonths(mon,dateToInsert);
int monthsOnceSpecial= intCal.getMonthsSpecial();
Date dateMonthsSpecial = intCal.getMonthsSpDate();
dbHelper.insertSpecialNotifications(1, convertDate(dateMonthsSpecial), monthsOnceSpecial,FOREIGN_KEY,PRIMARY_ID);
//For Weeks
intCal.specialIntervalsWeeks(weeks,dateToInsert);
int weeksOnceSpecial= intCal.getWeeksSpecial();
Date dateWeeksSpecial = intCal.getWeeksSpDate();
dbHelper.insertSpecialNotifications(2, convertDate(dateWeeksSpecial), weeksOnceSpecial,FOREIGN_KEY,PRIMARY_ID);
//For Days
intCal.specialIntervalsDays(days, dateToInsert);
int daysOnceSpecial= intCal.getDaysSpecial();
Date dateDaysSpecial = intCal.getDaysSpDate();
dbHelper.insertSpecialNotifications(3, convertDate(dateDaysSpecial), daysOnceSpecial,FOREIGN_KEY,PRIMARY_ID);
//For Hours
intCal.specialIntervalsHours(hours,dateToInsert);
int hoursOnceSpecial= intCal.getHoursSpecial();
Date dateHoursSpecial = intCal.getHoursSpDate();
dbHelper.insertSpecialNotifications(7, convertDate(dateHoursSpecial), hoursOnceSpecial,FOREIGN_KEY,PRIMARY_ID);
//For Minutes
intCal.specialIntervalMinutes(min,dateToInsert);
long minutesOnceSpecial= intCal.getMinutesSpecial();
Date dateMinutesSpecial= intCal.getMinutesSpDate();
dbHelper.insertSpecialNotifications(4, convertDate(dateMinutesSpecial), (int)minutesOnceSpecial,FOREIGN_KEY,PRIMARY_ID);
//For Seconds
intCal.specialIntervalsSeconds(secon,dateToInsert);
long secondsOnceSpecial= intCal.getSecondsSpecial();
Date dateSecondsSpecial= intCal.getSecondsSpDate();
dbHelper.insertSpecialNotifications(6, convertDate(dateSecondsSpecial), secondsOnceSpecial,FOREIGN_KEY,PRIMARY_ID);
}
publishProgress(progress);
Asycdialog.setMax(lines);
Asycdialog.incrementProgressBy(1);
i++;
}
}catch (Exception e){
}
try{
writeToSD();
}catch (Exception e){
System.out.println(""+e);
}
return "";
}
protected void onProgressUpdate(String... values) {
super.onProgressUpdate(values);
Asycdialog.setMessage("" + values[0]);
}
}
這裏是日誌：
01-15 09:22:36.215: E/SQLiteDatabase(728): close() was never explicitly called on database '/data/data/com.exa.birthdayrem/databases/Bdr'
01-15 09:22:36.215: E/SQLiteDatabase(728): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1943)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1007)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:986)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1051)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:770)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:221)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:157)
01-15 09:22:36.215: E/SQLiteDatabase(728): at com.exa.birthdayrem.DBAdapter.<init>(DBAdapter.java:110)
01-15 09:22:36.215: E/SQLiteDatabase(728): at com.exa.birthdayrem.LoaderClass$MagicCall.onPreExecute(LoaderClass.java:378)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:561)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.os.AsyncTask.execute(AsyncTask.java:511)
01-15 09:22:36.215: E/SQLiteDatabase(728): at com.exa.birthdayrem.LoaderClass.onLoadFinished(LoaderClass.java:225)
01-15 09:22:36.215: E/SQLiteDatabase(728): at com.exa.birthdayrem.LoaderClass.onLoadFinished(LoaderClass.java:1)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.app.LoaderManagerImpl$LoaderInfo.callOnLoadFinished(LoaderManager.java:433)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.app.LoaderManagerImpl$LoaderInfo.onLoadComplete(LoaderManager.java:405)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.content.Loader.deliverResult(Loader.java:110)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.content.CursorLoader.deliverResult(CursorLoader.java:88)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.content.CursorLoader.deliverResult(CursorLoader.java:42)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.content.AsyncTaskLoader.dispatchOnLoadComplete(AsyncTaskLoader.java:236)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.content.AsyncTaskLoader$LoadTask.onPostExecute(AsyncTaskLoader.java:76)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.os.AsyncTask.finish(AsyncTask.java:602)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.os.Handler.dispatchMessage(Handler.java:99)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.os.Looper.loop(Looper.java:137)
01-15 09:22:36.215: E/SQLiteDatabase(728): at android.app.ActivityThread.main(ActivityThread.java:4340)
01-15 09:22:36.215: E/SQLiteDatabase(728): at java.lang.reflect.Method.invokeNative(Native Method)
01-15 09:22:36.215: E/SQLiteDatabase(728): at java.lang.reflect.Method.invoke(Method.java:511)
01-15 09:22:36.215: E/SQLiteDatabase(728): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-15 09:22:36.215: E/SQLiteDatabase(728): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-15 09:22:36.215: E/SQLiteDatabase(728): at dalvik.system.NativeStart.main(Native Method)
01-15 09:22:36.215: E/System(728): Uncaught exception thrown by finalizer
01-15 09:22:36.235: E/System(728): java.lang.IllegalStateException: Don't have database lock!
01-15 09:22:36.235: E/System(728): at android.database.sqlite.SQLiteDatabase.verifyLockOwner(SQLiteDatabase.java:2090)
01-15 09:22:36.235: E/System(728): at android.database.sqlite.SQLiteDatabase$1.entryRemoved(SQLiteDatabase.java:2182)
01-15 09:22:36.235: E/System(728): at android.database.sqlite.SQLiteDatabase$1.entryRemoved(SQLiteDatabase.java:2178)
01-15 09:22:36.235: E/System(728): at android.util.LruCache.trimToSize(LruCache.java:197)
01-15 09:22:36.235: E/System(728): at android.util.LruCache.evictAll(LruCache.java:285)
01-15 09:22:36.235: E/System(728): at android.database.sqlite.SQLiteDatabase.deallocCachedSqlStatements(SQLiteDatabase.java:2143)
01-15 09:22:36.235: E/System(728): at android.database.sqlite.SQLiteDatabase.closeClosable(SQLiteDatabase.java:1126)
01-15 09:22:36.235: E/System(728): at android.database.sqlite.SQLiteDatabase.finalize(SQLiteDatabase.java:1914)
01-15 09:22:36.235: E/System(728): at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:182)
01-15 09:22:36.235: E/System(728): at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:168)
01-15 09:22:36.235: E/System(728): at java.lang.Thread.run(Thread.java:856)
open方法中將對DBAdapter：
public DBAdapter open() throws SQLException {
DBHelper = new DatabaseHelper(mCtx);
mDb = DBHelper.getWritableDatabase();
return this;
}
請給一些日誌，它可以被調查！ –
好心地發佈'DBAdapter'類的open（）方法的代碼 –
完成後，請檢查一下！ – Skynet