Android的捕捉音量加/减键presses广播接收器？ [英] Android capturing volume up/down key presses in broadcast receiver?

问题描述

我试图让一个应用程序，而用户可以更改音量加/减键的默认行为（以及开/关按钮在屏幕上 - 这可能吗？）。不管怎么说，使用一些code沿下面的线，我可以做到这一点：

  @覆盖
公共布尔的onkeydown（INT键code，KeyEvent的事件）{
super.onKeyUp（键code，事件）;
如果（（钥匙code == KeyEvent.KEY code_VOLUME_UP））{
    //这是我可以做我的东西
    返回true; //因为我处理的事件
}
返回false; //否则系统可以处理它
 

}

不过，我想这是可能的，即使在应用程序不公开，因此为什么我想建立一个广播接收器或者粘东西的服务，使这一切成为可能。

感谢您的帮助。

解决方案

  

，以及在屏幕上/关按钮 - ？是这可能

幸运的是，没有。

  

不过，我想这是可能的，即使在应用程序不公开，因此为什么我想建立一个广播接收器或者粘东西的服务，使之成为可能。

这是不可能的音量按钮。

  

例如，AndroSS您可以覆盖摄像头硬件按钮拍摄的截图。

这是相机按钮。如果前景活动不占用拍照键点击，也被变成了广播意图，这是其它应用程序可以监听。此行为是唯一的照相机和媒体按钮和不与任何其它硬件按钮使用。

I'm trying to make an application where the user can override the default behaviour of the volume up/down buttons (as well as the screen on/off button - is this possible?). Anyways, using some code along the lines of the following I can do this:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
super.onKeyUp(keyCode, event);
if ((keyCode == KeyEvent.KEYCODE_VOLUME_UP)) {
    //this is where I can do my stuff
    return true; //because I handled the event
}
return false; //otherwise the system can handle it        

}

But I would like it to be possible even when the application is not open, hence why I'd like to set up a broadcast receiver or maybe stick something in a service to make this possible.

Thanks for any help.

解决方案

as well as the screen on/off button - is this possible?

Fortunately, no.

But I would like it to be possible even when the application is not open, hence why I'd like to set up a broadcast receiver or maybe stick something in a service to make this possible.

This is not possible for the volume buttons.

For example, AndroSS allows you to override the camera hardware button to take a screenshot.

That is the camera button. If the foreground activity does not consume a camera button click, that gets turned into a broadcast Intent, which other applications can listen for. This behavior is unique to the camera and media buttons and is not used with any other hardware buttons.

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