Android的查看后台意外更改 [英] Android View background changes unexpectedly

问题描述

我要建一个应用程序，有很多的屏幕。 大部分的屏幕有一个观点，在与背景颜色的顶端。

I'm building an app that has plenty of screens. most of the screens have a View at the top with a background color.

我经常用改变颜色view.setBackgroundColor（彩色）

I often change that color using view.setBackgroundColor(color)

下面来了奇怪的事情：有时会设置一个视图的颜色之后，说＃f14fb7，在应用程序导航时，其他视图的背景被设置为颜色没有我想他们。 它有时甚至会发生意见我没有设定一个id，所以也没有办法setBackgroundColor拜访了这些看法。

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.

这种情况很少见，而不是一致的任何流量我试过了。

This happens rarely and is not consistant to any flow I tried.

当我杀了应用程序，并重新启动它，一切正常，因为它应该。

When I kill the app and restart it, everything works as it should.

我唯一的猜测是内存泄漏的一些国王，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.

谁能想到某种原因，要做到这一点？

Can anyone think of some reason for this to happen?

*它发生在我的Galaxy S3。

*It happens on my Galaxy S3.

推荐答案

无C吧$ C $是不容易的......但我猜你是重复使用相同的 Col​​orDrawable 在多个视图，如果你看看 View.setBackgroundColor（）源$ C ​​$ C：

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));
    }
}

您可以看到，它改变了 Col​​orDrawable 的颜色，不要每次都创建一个新的。我是pretty的肯定，这就是为什么你有这样奇怪的行为。

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.

修改

当您设置XML中的初始背景颜色与安卓背景你这样做（据<一href="http://developer.android.com/reference/android/view/View.html#attr_android%3abackground">android DOC ）：

When you set the initial background color in xml with android:background you are doing this (according android doc):

将背景设为一个给定的资源。资源应该是指一个可绘制对象

Set the background to a given resource. The resource should refer to a Drawable object

据我的理解，将在充气过程中设置的字段 View.mBGDrawable 。我建议你​​使用 View.setBackgoundDrawable（新ColorDrawable（the_color_int_ code）））而不是 setBackgroung（the_color_int_ code）。它应该解决您的问题。

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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