Invoke onScrollOverThreshold when STATE_DRAGGING only
Signed-off-by: Issac <issac@imid.me>
修正4.3上滑动闪屏的问题

Signed-off-by: Issac <issac@imid.me>
Merge pull request #2 from huahang/master

merge mor flexible signing
新增OverrideExitAnimation方法
使退出动画与滑动返回相同。

Signed-off-by: Issac <issac@imid.me>
修正Activity没有正确Finish的情况

Signed-off-by: Issac <issac@imid.me>