blocks|key|1342979|text|这个question讨论了如何更改视图的背景色。在其中一个答案中，这个人解释了如何在运行时更改背景颜色。显然，您将研究如何修改屏幕上的其他对象，但这应该会给您一个良好的开端，至少允许您在单击按钮时修改视图的背景颜色。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1342980|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/2748830/how-to-change-background-color-in-android-app^0|2|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

This <a href="https://stackoverflow.com/questions/2748830/how-to-change-background-color-in-android-app">question</a> talks about changing the background color of a view. In one of the answers, the person explains how to change the background color during runtime. Obviously you are going to look into how to modify other objects on the screen, but this should give you a good start by at least allowing you to modify the background color of the view on button click.

blocks|key|1343013|text|//+set+the+background+to+green
v.setBackgroundColor(0x0000FF00+);
v.invalidate();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1343014|代码未将按钮设置为绿色。相反，它使按钮完全不可见。|unstyled|1343015|说明:颜色的十六进制值是错误的。Alpha值为零时，颜色将不可见。|1343016|对于完全不透明的绿色，正确的十六进制值为0xFF00FF00。00和FF之间的任何Alpha值都会导致透明度。|offset|length|style|CODE|1343017|entityMap^0|0|0|0|K|A|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|F|7|W|8|@]|9|@]|A|$]]]|P|$]]

<pre><code>// set the background to green
v.setBackgroundColor(0x0000FF00 );
v.invalidate();
</code></pre>

The code does not set the button to green. Instead, it makes the button totally invisible.

Explanation: the hex value of the color is wrong. With an Alpha value of zero, the color will be invisible.

The correct hex value is <code>0xFF00FF00</code> for full opacity green. Any Alpha value between 00 and FF would cause transparency.

blocks|key|1127923|text|当你调用setBackgoundColor时，它会覆盖/移除任何现有的背景资源，包括任何边框、边角、填充等。你想要做的是改变现有背景资源的颜色……|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1127924|View+v;
v.getBackground().setColorFilter(Color.parseColor("#00ff00"),+PorterDuff.Mode.DARKEN);|code-block|syntax|javascript|1127925|尝试PorterDuff.Mode。*以获得不同的效果。|1127926|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

When you call setBackgoundColor it overwrites/removes any existing background resource, including any borders, corners, padding, etc.
What you want to do is change the color of the existing background resource...

<pre><code>View v;
v.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
</code></pre>

Experiment with PorterDuff.Mode.* for different effects.

blocks|key|1127983|text|你让你的按钮透明了。第一个字节是alpha。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1127984|试试v.setBackgroundColor(0xFF00FF00);|offset|length|style|CODE|1127985|entityMap^0|0|2|X|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

You made your button transparent. The first byte is the alpha.

Try <code>v.setBackgroundColor(0xFF00FF00);</code>

blocks|key|1343147|text|您可以使用以下命令将十六进制颜色设置为任何资源：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1343148|View.setBackgroundColor(Color.parseColor("#e7eecc"));|code-block|syntax|javascript|1343149|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can set the hex-color to any resource with:

<pre><code>View.setBackgroundColor(Color.parseColor("#e7eecc"));
</code></pre>

blocks|key|1343217|text|要设置屏幕上显示的第一种颜色，您也可以在相关的layout.xml+(更好的设计)中设置，方法是将此属性添加到相关的视图中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1343218|android:background="#FF00FF00"|code-block|syntax|javascript|1343219|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For setting the first color to be seen on screen, you can also do it in the relevant layout.xml (better design) by adding this property to the relevant View:

<pre><code>android:background="#FF00FF00"
</code></pre>

blocks|key|1128083|text|您可以简单地使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1128084|view.setBackgroundColor(Color.parseColor("#FFFFFF"));|code-block|syntax|javascript|1128085|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can simple use :

<pre><code>view.setBackgroundColor(Color.parseColor("#FFFFFF"));
</code></pre>

blocks|key|1343287|text|尝试添加：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1343288|setBackgroundColor(Color.parseColor("#FF0000"));|code-block|syntax|javascript|1343289|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try to add:

<pre><code>setBackgroundColor(Color.parseColor("#FF0000"));
</code></pre>

blocks|key|1128133|text|我在API最少16，目标23使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1128134|Button+WeekDoneButton+=+(Button)+viewWeeklyTimetable.findViewById(R.id.week_done_button);

WeekDoneButton.setBackgroundColor(ContextCompat.getColor(getActivity(),+R.color.colorAccent));|code-block|syntax|javascript|1128135|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I use at API min 16 , target 23

<pre><code>Button WeekDoneButton = (Button) viewWeeklyTimetable.findViewById(R.id.week_done_button);

WeekDoneButton.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.colorAccent));
</code></pre>

blocks|key|1128180|text|在Android6中使用ContextCompact声明|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1128181|++++++++view.setBackgroundColor(+ContextCompat.getColor(this,+R.color.your_color));|code-block|syntax|javascript|1128182|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Stating with Android 6 use ContextCompact 

<pre><code> view.setBackgroundColor( ContextCompat.getColor(this, R.color.your_color));
</code></pre>

blocks|key|1128191|text|mButton.setBackgroundColor(getResources().getColor(R.color.myColor));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1128192|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>mButton.setBackgroundColor(getResources().getColor(R.color.myColor));
</code></pre>

blocks|key|1343382|text|您可以简单地使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1343383|view.setBackgroundColor(Color.rgb(0,+198,+255));|code-block|syntax|javascript|1343384|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can simple use :

<pre><code>view.setBackgroundColor(Color.rgb(0, 198, 255));
</code></pre>

blocks|key|1343439|text|view.setBackgroundColor(R.color.primaryColor);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1343440|将颜色添加到先前的颜色值，因此我具有不同的颜色。|unstyled|1343441|对我有效的是：|1343442|view.setBackgroundResource(R.color.primaryColor);|1343443|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$B|C]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>view.setBackgroundColor(R.color.primaryColor);
</code></pre>

Adds color to previous color value, so i have a different color.

What works for me is :

<pre><code>view.setBackgroundResource(R.color.primaryColor);
</code></pre>

blocks|key|1128296|text|必须在参数中传递int。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1128297|第一个示例：|1128298|view.setBackgroundColor(-500136)|code-block|syntax|javascript|1128299|第二个例子：|1128300|int+colorId+=+R.color.green;

view.setBackgroundResource(colorId);|1128301|entityMap^0|8|3|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

You must pass an <code>int</code> in the argument.

First Example:

<pre><code>view.setBackgroundColor(-500136)
</code></pre>

Second Example:

<pre><code>int colorId = R.color.green;

view.setBackgroundResource(colorId);
</code></pre>

blocks|key|1343515|text|这应该可以很好地工作：v.setBackgroundColor(0xFF00FF00);|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1343516|entityMap^0|B|X|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

This should work fine: <code>v.setBackgroundColor(0xFF00FF00);</code>

blocks|key|1343544|text|我尝试了上面所有的方法。但是我还没有达到我想要的。这是我的尝试。如果您正在使用十六进制的颜色，并希望设置颜色作为图像的背景，那么这是kotlin代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1343545|val+bitmap+=+Bitmap.createBitmap(30,+30,+Bitmap.Config.ARGB_8888)
val+canvas+=+Canvas(bitmap)
val+colorCode+=+"#ffffff"
canvas.drawColor(Color.parseColor(colorCode))
mImageViewLogo.setImageBitmap(bitmap)|code-block|syntax|javascript|1343546|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I tried all the above ways. But I havent achieve what i need. Here is my try.
If you are using hexcode for color and want to set the color as background of image, then this is the kotlin code.

<pre><code>val bitmap = Bitmap.createBitmap(30, 30, Bitmap.Config.ARGB_8888)
val canvas = Canvas(bitmap)
val colorCode = "#ffffff"
canvas.drawColor(Color.parseColor(colorCode))
mImageViewLogo.setImageBitmap(bitmap)
</code></pre>

blocks|key|1343578|text|这对我很管用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1343579|v.getBackground().setTint(Color.parseColor("#212121"));|code-block|syntax|javascript|1343580|这样只会改变背景的颜色，而不会改变背景本身。这是有用的，例如，如果你有一个圆角的背景。|1343581|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This works for me
<pre><code>v.getBackground().setTint(Color.parseColor(&quot;#212121&quot;));
</code></pre>
That way only changes the color of the background without change the background itself. This is usefull for example if you have a background with rounded corners.

I'm trying to set the background color of a View (in this case a Button).

I use this code:

<pre><code>// set the background to green
v.setBackgroundColor(0x0000FF00 );
v.invalidate();
</code></pre>

It causes the Button to disappear from the screen. What am I doing wrong, and what is the correct way to change the background color on any View?

Thanks.

How to set background color of a View

我正在尝试设置视图(在本例中为Button)的背景色。我使用以下代码：// set the background to greenv.setBackgroundColor(0x0000FF00 );v.invalidate();它会使按钮从屏幕上消失。我做错了什么?更改任何视图的背景颜色的正确方法是什么？谢谢。

问如何设置视图的背景色
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