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저는 Rooms에서 app에있는 이전 sqlite db를 마이그레이션 중이며 사용자의 90 %에서 작동합니다. 문제는 100 %가 아니라는 것입니다. 충돌 보고서에 따르면 기기에는 많은 여유 공간과 RAM이 있으며 대부분 Android 4.4의 Samsung Note 2입니다. 또한 응용 프로그램에서 DB를 닫지 않을 것입니다.이전에 회의실 데이터베이스가 폐쇄되었습니다.
충돌 :
Fatal Exception: java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/com.szyk.myheart/databases/database.db
at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:55)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1648)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1594)
at android.arch.persistence.db.framework.FrameworkSQLiteDatabase.execSQL(SourceFile:240)
at com.szyk.myheart.data.room.Migrations$1.migrate(SourceFile:16)
at android.arch.persistence.room.RoomOpenHelper.onUpgrade(SourceFile:73)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.onUpgrade(SourceFile:118)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:257)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.getWritableSupportDatabase(SourceFile:93)
at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper.getWritableDatabase(SourceFile:54)
at android.arch.persistence.room.RoomDatabase.inTransaction(SourceFile:305)
at android.arch.persistence.room.InvalidationTracker$1.run(SourceFile:281)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)
룸이 대거 모듈 초기화된다
@Provides
@ApplicationScope
public static Database provideDatabase(Context context) {
return Room
.databaseBuilder(context, Database.class, "database.db")
.allowMainThreadQueries()
.addMigrations(Migrations.MIGRATION_25_to_26)
.addMigrations(Migrations.newDummyMigration(26, 27))
.build();
}
마이그레이션 코드 :
public class Migrations {
public static final Migration MIGRATION_25_to_26 = new Migration(25, 26) {
@Override
public void migrate(@NonNull SupportSQLiteDatabase database) {
Timber.d("Migrating to room");
Timber.d("Migration - creating new tables");
// Create the new table - it fails on first call to db
database.execSQL(
"CREATE TABLE IF NOT EXISTS users_new (_id INTEGER PRIMARY KEY AUTOINCREMENT, user_name TEXT NOT NULL, user_birth_date INTEGER, is_diabetes INTEGER NOT NULL)");
...
Timber.d("Migration - completed");
}
};
public static Migration newDummyMigration(int from, int to) {
return new Migration(from, to) {
@Override
public void migrate(@NonNull SupportSQLiteDatabase database) {
}
};
}
}