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Added in API level 1

public static interface RatingBar.OnRatingBarChangeListener

android.widget.RatingBar.OnRatingBarChangeListener

当评级已更改时通知客户的回调。这包括用户通过触摸手势或箭头键/轨迹球发起的更改以及以编程方式启动的更改。

Public methods
`abstract void`	`onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser)` 通知，评级已更改。

Added in API level 1

void onRatingChanged (RatingBar ratingBar, 
                float rating, 
                boolean fromUser)

通知，评级已更改。客户端可以使用fromUser参数来区分用户发起的更改和编程发生的更改。只有当用户通过抬起触摸来完成评定时，才会在用户拖动时连续调用此方法。

Parameters
`ratingBar`	`RatingBar`: The RatingBar whose rating has changed.
`rating`	`float`: The current rating. This will be in the range 0..numStars.
`fromUser`	`boolean`: True if the rating change was initiated by a user's touch gesture or arrow key/horizontal trackbell movement.