问题描述
我正在构建一个具有大量屏幕的应用.大多数屏幕的顶部都有一个带有背景颜色的视图.
I'm building an app that has plenty of screens. most of the screens have a View at the top with a background color.
我经常使用 view.setBackgroundColor(color) 改变颜色
I often change that color using view.setBackgroundColor(color)
奇怪的事情来了:有时在设置一个视图的颜色后,比如 #f14fb7 ,在应用程序中导航时,其他视图的背景被设置为该颜色,而我不希望它们如此.有时甚至会发生在我没有为其设置 id 的视图中,因此无法在这些视图上调用 setBackgroundColor.
Here comes the weird thing: sometimes after setting the color of one view, say to #f14fb7 , when navigating in the app, other views' backgrounds are set to that color without me wanting them to. It sometimes even happens to views I had not set an id for, so there is no way setBackgroundColor was called on those views.
这种情况很少发生,并且与我尝试过的任何流程都不一致.
This happens rarely and is not consistant to any flow I tried.
当我终止应用程序并重新启动它时,一切正常.
When I kill the app and restart it, everything works as it should.
我唯一的猜测是内存泄漏之王,但我希望有一个更简单的解释.
My only guess is some king of memory leak, but I hope there is a simpler explanation.
有人能想出发生这种情况的原因吗?
Can anyone think of some reason for this to happen?
*它发生在我的 Galaxy S3 上.
*It happens on my Galaxy S3.
推荐答案
没有代码,这并不容易...但我猜你是在多个视图上重用相同的 ColorDrawable
看View.setBackgroundColor()
源码:
Without the code it's not easy... but I guess you are reusing the same ColorDrawable
on multiple views and if you take a look at View.setBackgroundColor()
source code :
public void setBackgroundColor(int color) {
if (mBGDrawable instanceof ColorDrawable) {
((ColorDrawable) mBGDrawable).setColor(color);
} else {
setBackgroundDrawable(new ColorDrawable(color));
}
}
你可以看到它改变了 ColorDrawable
的颜色并且每次都不会创建一个新的.我很确定这就是你有这种奇怪行为的原因.
You can see that it change the color of the ColorDrawable
and don't create a new one each time. I'm pretty sure this is why you have this strange behavior.
编辑
当您使用 android:background
在 xml 中设置初始背景颜色时,您正在执行此操作(根据 android 文档):
When you set the initial background color in xml with android:background
you are doing this (according android doc):
为给定资源设置背景.资源应该引用一个 Drawable 对象
Set the background to a given resource. The resource should refer to a Drawable object
根据我的理解,它会在膨胀期间设置字段 View.mBGDrawable
.我建议你使用 View.setBackgoundDrawable(new ColorDrawable(the_color_int_code)))
而不是 setBackgroung(the_color_int_code)
.它应该可以解决您的问题.
According my understanding it will set the field View.mBGDrawable
during the inflate. I suggest you to use View.setBackgoundDrawable(new ColorDrawable(the_color_int_code)))
instead of setBackgroung(the_color_int_code)
. It should solve your issue.
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