android 如何随时获取光线传感器值和电池电量?
我正在编写一个程序,我能够获取光传感器值和当前电池电量,但只有光值发生变化以及电池电量何时发生变化。有没有办法随时获取这两个值?就像当用户运行我的程序时,我想立即获取当前值,而不必等待它们更改。
I am writing a program and I am able to get the light sensor value and current battery level, but only the light value changes and when the battery level changes. Is there a way to get these two values anytime? Like when a user runs my program, I would like to grab the current values right away instead of having to wait for them to change.
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如果您有代码可以在值更改时接收该值,则可以将该值存储在变量中,并且在每次更改时只需使用 setter 方法更新该变量。然后,每当您需要当前值时,只需使用 getter 方法调用该变量即可。
因此,如果您的方法如下所示,
您可以使用 getter 方法来返回当前电池电量
rawlevel
,并且您可以对光传感器值执行相同的操作。If you have the code to receive the value when it changes, you could store the value in a variable and when on every change just update the variable with a setter method. Then, whenever you need the current value anytime, just call the variable using a getter method.
So if your method looks like this
You can have a getter method to return the currentl battery level,
rawlevel
, and you can do the same for the light sensor value.把它放在你的 mainActivity 中:
这仅适用于光传感器值,因为我看到其他人发布了有关电池电量的信息。
编辑:我再次阅读您的问题,发现您想随时手动获取它。每当值发生更改时,该值都会更新,因此您始终可以获得最新的信息。
您可以尝试将延迟设置更改为
SensorManager.SENSOR_DELAY_FASTEST
,刷新率会快很多。put this in your mainActivity:
this is for the light sensor value only because I see someone else has posted about the battery level.
EDIT: i read your question again and see that you want to get it manually anytime. Well this value gets updated whenever the value is changed, so you are always getting the most recent information.
You can try setting changing the delay to
SensorManager.SENSOR_DELAY_FASTEST
and the refresh rate will be a lot faster.