Application did not close the cursor or database object that was opened here
这两天调试程序的时候,发现LogCat里时不时的会打出"DatabaseObjectNotClosedException"这个异常,异常的详细堆栈信息如下：close() was never explicitly called on database '/data/data/cn.eric.sqlitedbdemo/databases/people.db'
android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1827)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:820)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:854)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:847)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:541)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:118)
at cn.eric.sqlitedbdemo.SQLiteDatabaseHelper.query(SQLiteDatabaseHelper.java:61)
at cn.eric.sqlitedbdemo.SQLiteDatabaseDemo$1$1.run(SQLiteDatabaseDemo.java:53)
但是这个异常的抛出并没有让程序崩溃。
这些异常信息来源于SQLiteDatabase类的finalize方法。从异常的信息＂close() was never explicitly called on database ，Application did not close the cursor or database object that was opened here
＂可以知道这是由于程序中使用到的游标或SQLiteDatabase对象没有close所导致。也就是说在程序中创建的Cursor对象或者SQLiteDatabase对象，在使用完后没有关闭，而当它们都变成“垃圾"被ＧＣ时，就会打出以上的信息。
@Override protected void finalize() { if (isOpen()) { Log.e(TAG, "close() was never explicitly called on database '" + mPath + "' ", mStackTrace); closeClosable(); onAllReferencesReleased(); } }
所以要想不发生这样的错误，在编码时一定要记住，当你不在使用Cursor或SQLiteDatabase对象时，将它们close()，
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