我有两个片段，在这两个片段中，它将执行使用sqlbrite的代码。虽然应用程序在正常使用情况下不会崩溃，但问题是，如果我在短时间内多次来回加载这两个片段，应用程序将因此错误而崩溃。
E/CursorWindow: Could not allocate CursorWindow '/data/data/com.imincode.meniti/databases/meniti' of size 2097152 due to error -12.
E/CursorWindow: Could not allocate CursorWindow '/data/data/com.imincode.meniti/databases/meniti' of size 2097152 due to error -12.
E/CursorWindow: Could not allocate CursorWindow '/data/data/com.imincode.meniti/databases/meniti' of size 2097152 due to error -12.
W/libc: pthread_create failed: couldn't allocate 1064960-byte stack: Out of memory
W/libc: pthread_create failed: couldn't allocate 1064960-byte stack: Out of memory
W/System.err: android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed.
W/System.err: android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed.
W/System.err: android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed.
E/CursorWindow: Could not allocate CursorWindow '/data/data/com.imincode.meniti/databases/meniti' of size 2097152 due to error -12.
W/System.err: android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed.
E/CursorWindow: Could not allocate CursorWindow '/data/data/com.imincode.meniti/databases/meniti' of size 2097152 due to error -12.
W/System.err: android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed.
E/art: Throwing OutOfMemoryError "pthread_create (1040KB stack) failed: Try again"
E/art: Throwing OutOfMemoryError "pthread_create (1040KB stack) failed: Try again"
W/System.err: at at android.database.CursorWindow.<init>(CursorWindow.java:108)
W/System.err: at at android.database.CursorWindow.<init>(CursorWindow.java:108)
W/System.err: at at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198)
W/System.err: at android.database.CursorWindow.<init>(CursorWindow.java:108)
W/System.err: at at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198)
W/System.err: at android.database.CursorWindow.<init>(CursorWindow.java:108)
W/System.err: at android.database.CursorWindow.<init>(CursorWindow.java:108)
W/System.err: at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:139)
W/System.err: at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198)
W/System.err: at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:139)
W/System.err: at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
W/System.err: at com.imincode.meniti.db.DbHelper$6.call(DbHelper.java:438)
W/System.err: at com.imincode.meniti.db.DbHelper$6.call(DbHelper.java:431)
W/System.err: at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
W/System.err: at rx.observers.Subscribers$5.onNext(Subscribers.java:235)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.emit(OperatorOnBackpressureLatest.java:165)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.onNext(OperatorOnBackpressureLatest.java:131)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestSubscriber.onNext(OperatorOnBackpressureLatest.java:211)
W/System.err: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:224)
W/System.err: at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:230)
W/System.err: android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198)
W/System.err: at at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:139)
W/System.err: at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
W/System.err: at com.imincode.meniti.db.DbHelper$4.call(DbHelper.java:368)
W/System.err: at com.imincode.meniti.db.DbHelper$4.call(DbHelper.java:361)
W/System.err: at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
W/System.err: at rx.observers.Subscribers$5.onNext(Subscribers.java:235)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.emit(OperatorOnBackpressureLatest.java:165)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.onNext(OperatorOnBackpressureLatest.java:131)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestSubscriber.onNext(OperatorOnBackpressureLatest.java:211)
W/System.err: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:224)
W/System.err: at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198)
W/System.err: at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:139)
W/System.err: at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
W/System.err: at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
W/System.err: at com.imincode.meniti.db.DbHelper$6.call(DbHelper.java:438)
W/System.err: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
W/System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
W/System.err: at com.imincode.meniti.db.DbHelper$6.call(DbHelper.java:431)
W/System.err: at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
W/System.err: at rx.observers.Subscribers$5.onNext(Subscribers.java:235)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.emit(OperatorOnBackpressureLatest.java:165)
W/System.err: android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:139)
W/System.err: at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
W/System.err: at com.imincode.meniti.db.DbHelper$4.call(DbHelper.java:368)
W/System.err: at com.imincode.meniti.db.DbHelper$4.call(DbHelper.java:361)
W/System.err: at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
W/System.err: at rx.observers.Subscribers$5.onNext(Subscribers.java:235)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.emit(OperatorOnBackpressureLatest.java:165)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.onNext(OperatorOnBackpressureLatest.java:131)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestSubscriber.onNext(OperatorOnBackpressureLatest.java:211)
W/System.err: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:224)
W/System.err: at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:230)
W/System.err: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
W/System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err: at java.lang.Thread.run(Thread.java:818)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.onNext(OperatorOnBackpressureLatest.java:131)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestSubscriber.onNext(OperatorOnBackpressureLatest.java:211)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err: at java.lang.Thread.run(Thread.java:818)com.imincode.meniti.db.DbHelper$4.call(DbHelper.java:368)
W/System.err: at com.imincode.meniti.db.DbHelper$4.call(DbHelper.java:361)
W/System.err: at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
W/System.err: at rx.observers.Subscribers$5.onNext(Subscribers.java:235)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.emit(OperatorOnBackpressureLatest.java:165)
W/System.err: rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:224)
W/System.err: at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:230)
W/System.err: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
W/System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err: at java.lang.Thread.run(Thread.java:818)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestEmitter.onNext(OperatorOnBackpressureLatest.java:131)
W/System.err: at rx.internal.operators.OperatorOnBackpressureLatest$LatestSubscriber.onNext(OperatorOnBackpressureLatest.java:211)
W/System.err: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:224)
W/System.err: at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:230)
W/System.err: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
W/System.err: rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:230)
W/System.err: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
W/System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err: at java.lang.Thread.run(Thread.java:818)
W/System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
W/System.err: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err: at java.lang.Thread.run(Thread.java:818)
W/libc: pthread_create failed: couldn't allocate 1064960-byte stack: Out of memory
E/art: Throwing OutOfMemoryError "pthread_create (1040KB stack) failed: Try again"
W/libc: pthread_create failed: couldn't allocate 1064960-byte stack: Out of memory
E/art: Throwing OutOfMemoryError "pthread_create (1040KB stack) failed: Try again"
其中一个片段有大约50个Observable，然后使用Observable.combineLatest进行组合。这是片段的代码片段（另一个片段有类似的代码）。下面基本上是我的代码的简化版本。
public class MenuSummary extends Fragment{
private DbHelper dbHelper;
private Observable<?> incomeFromParentJar, getIncomeNecessities, getIncomeSavings, getIncomeEntertainment, getIncomeInvestment, getIncomeEducation, getIncomeCharity;
private Observable<?> getExpensesNecessities, getExpensesSavings, getExpensesEntertainment, getExpensesInvestment, getExpensesEducation, getExpensesCharity;
private Observable<?> getTotalUnpaidMonthlyRecurringExpensesNecessities, getTotalUnpaidMonthlyRecurringExpensesSavings;
private Observable imin;
private Subscription s;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dbHelper = new DbHelper(getContext());
}
@Override
public void onPause(){
super.onPause();
dbHelper.close();
s.unsubscribe();
}
@Override
public void onResume(){
super.onResume();
displaySummary(selectedYear,selectedMonth);
}
@Override
public void onStop() {
super.onStop();
}
@Override
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
}
private void displaySummary(final int selectedYear, final int selectedMonth){
incomeFromParentJar = dbHelper.getParentJarIncomeUpTo(selectedYear,selectedMonth);
getIncomeNecessities = dbHelper.getIndividualJarIncomeUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_NECESSITIES);
getIncomeSavings = dbHelper.getIndividualJarIncomeUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_SAVINGS);
getIncomeEntertainment = dbHelper.getIndividualJarIncomeUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_ENTERTAINMENT);
getIncomeInvestment = dbHelper.getIndividualJarIncomeUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_INVESTMENT);
getIncomeEducation = dbHelper.getIndividualJarIncomeUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_EDUCATION);
getIncomeCharity = dbHelper.getIndividualJarIncomeUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_CHARITY);
getExpensesNecessities = dbHelper.getJarExpensesUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_NECESSITIES);
getExpensesSavings = dbHelper.getJarExpensesUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_SAVINGS);
getExpensesEntertainment = dbHelper.getJarExpensesUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_ENTERTAINMENT);
getExpensesInvestment = dbHelper.getJarExpensesUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_INVESTMENT);
getExpensesEducation = dbHelper.getJarExpensesUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_EDUCATION);
getExpensesCharity = dbHelper.getJarExpensesUpTo(selectedYear,selectedMonth,MySQLiteHelper.JAR_CHARITY);
List<Observable<?>> myObservables = Arrays.asList(incomeFromParentJar,getIncomeNecessities,getIncomeSavings,getIncomeEntertainment, getIncomeInvestment,getIncomeEducation,getIncomeCharity,getExpensesNecessities,getExpensesSavings,getExpensesEntertainment,getExpensesInvestment, getExpensesEducation,getExpensesCharity);
imin = Observable.combineLatest(myObservables, new FuncN<List<BigDecimal>>() {
@Override
public List<BigDecimal> call(Object... args) {
BigDecimal incomeTotal, incomeNecessities, incomeSavings, incomeEntertainment;
BigDecimal incomeInvestment, incomeEducation, incomeCharity;
List<BigDecimal> incomeFromParentJar = (List<BigDecimal>) args[0];
List<BigDecimal> expensesAndBalance = new ArrayList<BigDecimal>();
incomeTotal = incomeFromParentJar.get(0);
incomeNecessities = incomeFromParentJar.get(1);
incomeSavings = incomeFromParentJar.get(2);
incomeEntertainment = incomeFromParentJar.get(3);
incomeInvestment = incomeFromParentJar.get(4);
incomeEducation = incomeFromParentJar.get(5);
incomeCharity = incomeFromParentJar.get(6);
incomeNecessities = incomeNecessities.add((BigDecimal) args[1]);
.....
.....
.....
}
}
).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
s = imin.subscribe(new Action1<List<BigDecimal>>() {
@Override
public void call(List<BigDecimal> expensesAndBalance) {
//do plenty of view.settext here
}});
}
以下是DbHelper类的外观。请注意，我只显示其中一个被调用函数的代码..另一个函数几乎相同（当然除了查询）..
任何人都可以查明我哪里出错了吗？
public class DbHelper {
private MySQLiteHelper mySQLiteHelper;
SqlBrite sqlBrite = new SqlBrite.Builder().build();
BriteDatabase briteDb;
Subscription subscription;
private static DbHelper instance;
public DbHelper(Context context) {
mySQLiteHelper = new MySQLiteHelper(context);
sqlBrite = new SqlBrite.Builder().build();
}
public Observable<BigDecimal> getIndividualJarIncomeUpTo(final int endYear, final int endMonth, final int moneyJar){
briteDb = sqlBrite.wrapDatabaseHelper(mySQLiteHelper,Schedulers.io());
final String[] args = new String[]{moneyJar + "", endYear + "", endMonth + "", endYear + "", };
Observable<BigDecimal> myObservable;
myObservable = briteDb.createQuery(MySQLiteHelper.TABLE_INCOME, "SELECT total FROM " + MySQLiteHelper.TABLE_INCOME +
" WHERE moneyJar = ? AND ((year = ? AND month <= ?) OR (year < ?)) and isDeleted = 0", args)
.map(new Func1<SqlBrite.Query, BigDecimal>() {
@Override
public BigDecimal call(SqlBrite.Query query) {
Cursor cursor = query.run();
BigDecimal income, incomeTotal = new BigDecimal(0);
if (cursor != null) {
try {
if (cursor.getCount() > 0 && cursor.moveToFirst()) {
do {
income = new BigDecimal(cursor.getString(cursor.getColumnIndex("total")));
incomeTotal = incomeTotal.add(income);
} while (cursor.moveToNext());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
cursor.close();
}
if (moneyJar == 1) {
Log.v(FILE_NAME, "imini " + endYear + " " + endMonth + " incomeTotal: " + incomeTotal);
}
}
return incomeTotal;
}
});
return myObservable;
}
public void close(){
if (briteDb != null) {
briteDb.close();
}
}
}
答案 0 :(得分：0)
我重构了我的代码和sql查询，并将可观察数量减少到只有12而不是原来的60，问题就消失了。所以基本上这个问题是由于我的设计不好造成的。