运行taptap v2.2.1_a异常退出

Android N版本设备在运行版本v2.2.1_a 会出现数据库版本问题导致异常退出，异常日志如下：

09-26 11:09:14.701 1595 1630 E AndroidRuntime: FATAL EXCEPTION: pool-2-thread-1

09-26 11:09:14.701 1595 1630 E AndroidRuntime: Process: com.taptap, PID: 1595

09-26 11:09:14.701 1595 1630 E AndroidRuntime:

android.database.sqlite.SQLiteException: Can't downgrade database from

version 19 to 15

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at

android.database.sqlite.SQLiteOpenHelper.onDowngrade(SQLiteOpenHelper.java:360)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at

android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:254)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at

android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at com.play.taptap.apps.db.TapDBHelper.<init>(SourceFile:60)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at com.play.taptap.apps.db.TapDBHelper.a(SourceFile:53)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at com.appreporter.Worker.i(SourceFile:124)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at com.appreporter.Worker.a(SourceFile:32)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at com.appreporter.Worker$1.run(SourceFile:70)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at

java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at

java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)

09-26 11:09:14.701 1595 1630 E AndroidRuntime: at java.lang.Thread.run(Thread.java:761)