android:layout_gravity=”0x37”
意思就是
android:layout_gravity=”top|fill_horizontal”
Gravity類提供的常量列表如下：
NO_GRAVITY Constant Value: 0 (0x00000000)
LEFT Constant Value: 3 (0x00000003)
RIGHT Constant Value: 5 (0x00000005)
START Constant Value: 8388611 (0x00800003)
END Constant Value: 8388613 (0x00800005)
TOP Constant Value: 48 (0x00000030)
BOTTOM Constant Value: 80 (0x00000050)
CENTER Constant Value: 17 (0x00000011)
CENTER_HORIZONTAL Constant Value: 1 (0x00000001)
CENTER_VERTICAL Constant Value: 16 (0x00000010)
FILL_HORIZONTAL Constant Value: 7 (0x00000007)
FILL_VERTICAL Constant Value: 112 (0x00000070)
FILL Constant Value: 119 (0x00000077)
CLIP_HORIZONTAL Constant Value: 8 (0x00000008)
CLIP_VERTICAL Constant Value: 128 (0x00000080)
DISPLAY_CLIP_HORIZONTAL Constant Value: 16777216 (0x01000000)
DISPLAY_CLIP_VERTICAL Constant Value: 268435456 (0x10000000)
HORIZONTAL_GRAVITY_MASK Constant Value: 7 (0x00000007)
VERTICAL_GRAVITY_MASK Constant Value: 112 (0x00000070)
RELATIVE_HORIZONTAL_GRAVITY_MASK Constant Value: 8388615 (0x00800007)
RELATIVE_LAYOUT_DIRECTION Constant Value: 8388608 (0x00800000)
AXIS_CLIP Constant Value: 8 (0x00000008)
AXIS_PULL_AFTER Constant Value: 4 (0x00000004)
AXIS_PULL_BEFORE Constant Value: 2 (0x00000002)
AXIS_SPECIFIED Constant Value: 1 (0x00000001)
AXIS_X_SHIFT Constant Value: 0 (0x00000000)
AXIS_Y_SHIFT Constant Value: 4 (0x00000004)
參考：
https://developer.android.com/reference/android/view/Gravity.html