问题描述
我希望我的Codename One应用对音量调高/调低键(位于设备侧的物理键)做出反应.实际上，我已经有一个执行操作的按钮，但我也想提供使用音量键启动操作的可能性.
I would like my Codename One app to react to volume up / down keys (the physical keys that lay on the device side). Actually I already have a button that does the action but I would also like to offer the possibility to use the volume keys to launch the action.
我找到了原型读取的方法 keyPressed()
I found the method keyPressed() which prototype reads
public void keyPressed(int keyCode)
但是我无法真正找到调高音量的keyCode常数.
but I was not able to actually find the keyCode constant for volume up / down.
如何将音量调高/调低键分配给代号为One的动作?
How can I assign the volume up / down keys to an action with Codename One ?
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推荐答案
按下/释放的键将不会被调用以进行音量控制，因为这在本机调用链中太深了，并且非常依赖于设备.音量键始终被视为一种特殊情况，因此我们让它们执行预期的操作"并提供一些量身定制的回调，但是我们不支持重新使用"音量键的用例.
Key pressed/released won't be invoked for volume since that is way too deep in the native call chain and very device dependent. Volume keys are always treated as a special case so we make them do "what's expected" and provide some tailored callbacks but we don't support the use case of "re-purposing" volume keys.
可能可以通过更改 AndroidImplementation 类以使其包含特例(可能通过display属性触发)并为此提交请求请求.
It might be possible by changing the AndroidImplementation class to include a special case (possibly triggered via a display property) and submitting a pull request for that.
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