public class VSession {

    private VSession() {

    }

    public static VSession getInstance() {

        if (session == null)

            session = new VSession();

        return session;

    }

    // 跳转到主Activity

    public void exit(Activity activity) {

        Intent intent = new Intent(activity, MainActivity.class);

        activity.startActivity(intent);

        activity.overridePendingTransition(R.anim.push_right_in,R.anim.push_right_out);

        activity.finish();

    }

}

VSession.getInstance().exit(TextActivity.this);