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當我使用1.0.0-alpha5版本的房間持久性庫時，一切正常。但是，更新到1.0.0-alpha9版本後，我得到這個錯誤：房間持久性庫：嘗試重新打開已關閉的對象
java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/package_name/databases/app_db
我該如何解決這個問題？
編輯：
我使用的MVP架構匕首2.我有DatabaseHelper類初始化RoomDatabase：
@Singleton
public class DatabaseHelper {
private final AppDatabase appDatabase;
@Inject
public DatabaseHelper(@ApplicationContext Context context) {
appDatabase = Room.databaseBuilder(context, AppDatabase.class, "app_db").build();
}
public List<DifficultyEntity> getAllDifficulties() {
return appDatabase.difficultyDao().getAllDifficulties();
}
我RoomDatabase：
@Database(version = 22, entities = {
DifficultyEntity.class, // ....
})
@Singleton
public abstract class AppDatabase extends RoomDatabase {
public abstract DifficultyDao difficultyDao();
//....
}
當我打電話getAllDifficulties方法，我收到該錯誤。
這裏的logcat的：
java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/package_name/databases/app_db
at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:55)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1783)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1729)
at android.arch.persistence.db.framework.FrameworkSQLiteDatabase.execSQL(FrameworkSQLiteDatabase.java:241)
at android.arch.persistence.room.RoomOpenHelper.createMasterTableIfNotExists(RoomOpenHelper.java:130)
at android.arch.persistence.room.RoomOpenHelper.checkIdentity(RoomOpenHelper.java:106)
at android.arch.persistence.room.RoomOpenHelper.onOpen(RoomOpenHelper.java:99)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$1.onOpen(FrameworkSQLiteOpenHelper.java:64)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:266)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.getWritableSupportDatabase(FrameworkSQLiteOpenHelper.java:106)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper.getWritableDatabase(FrameworkSQLiteOpenHelper.java:82)
at android.arch.persistence.room.RoomDatabase.query(RoomDatabase.java:191)
at uz.iumarov.ieltsspeaking.data.local.database.daos.RecordingDao_Impl.getAllRecordings(RecordingDao_Impl.java:167)
at uz.iumarov.ieltsspeaking.data.local.database.DatabaseHelper.getAllRecording(DatabaseHelper.java:361)
at uz.iumarov.ieltsspeaking.ui.main.recordingsFragment.RecordingsPresenter$1.call(RecordingsPresenter.java:77)
at uz.iumarov.ieltsspeaking.ui.main.recordingsFragment.RecordingsPresenter$1.call(RecordingsPresenter.java:74)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
at rx.internal.schedulers.EventLoopsScheduler$EventLoopWorker$1.call(EventLoopsScheduler.java:172)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
編輯2：
一段時間後，我開始收到不同的錯誤：
java.lang.IllegalStateException: Room cannot verify the data integrity. Looks like you've changed schema but forgot to update the version number. You can simply fix this by increasing the version number.
at android.arch.persistence.room.RoomOpenHelper.checkIdentity(RoomOpenHelper.java:118)
at android.arch.persistence.room.RoomOpenHelper.onOpen(RoomOpenHelper.java:99)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$1.onOpen(FrameworkSQLiteOpenHelper.java:64)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:266)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.getWritableSupportDatabase(FrameworkSQLiteOpenHelper.java:106)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper.getWritableDatabase(FrameworkSQLiteOpenHelper.java:82)
at android.arch.persistence.room.RoomDatabase.query(RoomDatabase.java:191)
at uz.iumarov.ieltsspeaking.data.local.database.daos.RecordingDao_Impl.getAllRecordings(RecordingDao_Impl.java:167)
at uz.iumarov.ieltsspeaking.data.local.database.DatabaseHelper.getAllRecording(DatabaseHelper.java:361)
at uz.iumarov.ieltsspeaking.ui.main.recordingsFragment.RecordingsPresenter$1.call(RecordingsPresenter.java:77)
at uz.iumarov.ieltsspeaking.ui.main.recordingsFragment.RecordingsPresenter$1.call(RecordingsPresenter.java:74)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
at rx.internal.schedulers.EventLoopsScheduler$EventLoopWorker$1.call(EventLoopsScheduler.java:172)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
而當我更新的版本號，我獲取遷移錯誤：
java.lang.IllegalStateException: A migration from 22 to 23 is necessary. Please provide a Migration in the builder or call fallbackToDestructiveMigration in the builder in which case Room will re-create all of the tables.
at android.arch.persistence.room.RoomOpenHelper.onUpgrade(RoomOpenHelper.java:81)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$1.onUpgrade(FrameworkSQLiteOpenHelper.java:49)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:256)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.getWritableSupportDatabase(FrameworkSQLiteOpenHelper.java:106)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper.getWritableDatabase(FrameworkSQLiteOpenHelper.java:82)
at android.arch.persistence.room.RoomDatabase.query(RoomDatabase.java:191)
at uz.iumarov.ieltsspeaking.data.local.database.daos.RecordingDao_Impl.getAllRecordings(RecordingDao_Impl.java:167)
at uz.iumarov.ieltsspeaking.data.local.database.DatabaseHelper.getAllRecording(DatabaseHelper.java:361)
at uz.iumarov.ieltsspeaking.ui.main.recordingsFragment.RecordingsPresenter$1.call(RecordingsPresenter.java:77)
at uz.iumarov.ieltsspeaking.ui.main.recordingsFragment.RecordingsPresenter$1.call(RecordingsPresenter.java:74)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
at rx.internal.schedulers.EventLoopsScheduler$EventLoopWorker$1.call(EventLoopsScheduler.java:172)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
請有人幫助我！
解決
我刪除了我的應用程序並重新安裝。現在，一切工作正常與alpha9 verison。
請提供[mcve]。這將包括整個Java堆棧跟蹤以及觸發堆棧跟蹤的代碼。 – CommonsWare
@CommonsWare我更新了我的問題。請看一看。 – Umarov
@CommonsWare我解決了它。感謝您的關注！ – Umarov