MotionEvent

getAction() returns a pointer id and an event (i.e., up, down, move) information.

getActionMasked() returns just an event (i.e., up, down, move) information. Other info is masked out.

For example:

getAction() returns 0x0105.
getActionMasked() will return 0x0005, which is 0x0105 && ACTION_MASK.

    1. The value of ACTION_MASK is 0xFF. It masks the following actions.
      • ACTION_DOWN 0, UP 1, MOVE 2
      • ACTION_POINTER_DOWN 5, UP 6
    2. The value of ACTION_POINTER_ID_MASK is 0xFF00. It masked the pointer ID from following deprecated constants.
      • ACTION_POINTER_1_DOWN 0x0005
      • ACTION_POINTER_2_DOWN 0x0105
      • ACTION_POINTER_3_DOWN 0x0205
posted @ 2014-03-31 15:06  等风来。。  Views(259)  Comments(0)  Edit  收藏  举报
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