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Added in API level 1

public static interface SeekBar.OnSeekBarChangeListener

android.widget.SeekBar.OnSeekBarChangeListener

当进程级别发生变化时通知客户端的回调。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`	`onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)` 通知进展水平已经改变。
`abstract void`	`onStartTrackingTouch(SeekBar seekBar)` 通知用户已经开始触摸手势。
`abstract void`	`onStopTrackingTouch(SeekBar seekBar)` 通知用户已完成触摸手势。

Added in API level 1

void onProgressChanged (SeekBar seekBar, 
                int progress, 
                boolean fromUser)

通知进展水平已经改变。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。

Parameters
`seekBar`	`SeekBar`: The SeekBar whose progress has changed
`progress`	`int`: The current progress level. This will be in the range 0..max where max was set by `setMax(int)`. (The default value for max is 100.)
`fromUser`	`boolean`: True if the progress change was initiated by the user.

Added in API level 1

void onStartTrackingTouch (SeekBar seekBar)

通知用户已经开始触摸手势。客户可能想要使用它来禁用前进的搜索栏。

Parameters
`seekBar`	`SeekBar`: The SeekBar in which the touch gesture began

Added in API level 1

void onStopTrackingTouch (SeekBar seekBar)

通知用户已完成触摸手势。客户可能想要使用它来重新启用搜索栏。

Parameters
`seekBar`	`SeekBar`: The SeekBar in which the touch gesture began