====================问题描述====================
异常日志如下：
Caused by: java.lang.IllegalStateException: Cannot perform this operation because the connection pool has been closed. at android.database.sqlite.SQLiteConnectionPool.throwIfClosedLocked(SQLiteConnectionPool.java:962) at android.database.sqlite.SQLiteConnectionPool.waitForConnection(SQLiteConnectionPool.java:599) at android.database.sqlite.SQLiteConnectionPool.acquireConnection(SQLiteConnectionPool.java:348) at android.database.sqlite.SQLiteSession.acquireConnection(SQLiteSession.java:894) at android.database.sqlite.SQLiteSession.executeForCursorWindow(SQLiteSession.java:834) at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:62) at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:143) at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133) at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:196) at android.database.AbstractCursor.moveToNext(AbstractCursor.java:244)
我知道这是数据库连接被关闭导致的，但是怎么解决这个问题呢，网上能找到的解决办法都试了，还是会报这个问题，请教高人指点!
====================解决方案1====================
那就在使用后才关闭啊
====================解决方案2====================
是不是没有关闭cursor，然后再次访问造成的异常
====================解决方案3====================
光这么点代码难办啊，最好能描述下db的使用的流程
====================解决方案4====================
放线程里有问题，放服务里没问题？
是不是线程没执行完（数据库没来得及close）就强制结束了。
====================解决方案5====================
sqllite 是不支持多线程 同时 读写的，是不是这个问题？
数据库操作的异常Cannot perform this operation because the connection pool has been close