Android中发现的方向键旋转定义

最新推荐文章于 2022-06-07 15:57:57 发布

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最新推荐文章于 2022-06-07 15:57:57 发布

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本文链接：https://blog.youkuaiyun.com/tdstds/article/details/19082567

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在frameworks/base/libs/ui/InputReader.cpp中有定义：

static const int32_t keyCodeRotationMap[][4] = {
        // key codes enumerated counter-clockwise with the original (unrotated) key first
        // no rotation,        90 degree rotation, 180 degree rotation, 270 degree rotation
        { AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT, AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT },
        { AKEYCODE_DPAD_RIGHT, AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN },
        { AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT },
        { AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT, AKEYCODE_DPAD_UP },
};

感觉像方向键旋转定义，还未改过，做个记号。