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try {

        DebugUtil.d("test","---activity   finish belong");

        for (Activity activity : mActList) {

            if (activity != null)

                activity.finish();

        }

        DebugUtil.d("test","---activity   finish after");

        DbManager   db = MyDbManager.getInstance(application).getDb();

        if (db != null)

            db.close();

    } catch (Exception e) {

        e.printStackTrace();

    } finally {

        DebugUtil.d("test","---system.exit()");

        System.exit(0);

    }

}