如何以编程方式更改图层列表中形状的颜色(#000000
)?
这是我的图层列表:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<solid android:color="#000000" /> // CHANGE THIS COLOR
</shape>
</item>
<item android:left="5dp">
<shape android:shape="rectangle">
<solid android:color="@color/bg" />
</shape>
</item>
</layer-list>
答案 0 :(得分:52)
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/gradientDrawble"> // Give id
<shape android:shape="rectangle">
<solid android:color="#000000" /> // CHANGE THIS COLOR
</shape>
</item>
<item android:left="5dp">
<shape android:shape="rectangle">
<solid android:color="@color/bg" />
</shape>
</item>
</layer-list>
然后在你的代码中添加
LayerDrawable layerDrawable = (LayerDrawable) getResources()
.getDrawable(R.drawable.my_drawable);
GradientDrawable gradientDrawable = (GradientDrawable) layerDrawable
.findDrawableByLayerId(R.id.gradientDrawble);
gradientDrawable.setColor(color); // change color
2016年10月更新
getDrawable()
现已弃用,您应该使用ContextCompat.getDrawable(context, color)
。
此外,如果您通过LayerDrawable
获得findDrawableByLayerId()
,那么您必须致电view.setBackground(layerDrawable)
才能生效。或者,通过layerDrawable
实例化view.getBackground()
也有效。
答案 1 :(得分:6)
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/outer">
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size android:height="40dp" android:width="40dp"/>
<padding android:top="3dp" android:bottom="3dp" android:right="3dp" android:left="3dp"/>
<stroke
android:width="1dp"
android:color="#ffffff"/>
</shape>
</item>
<item android:id="@+id/middle">
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size android:height="40dp" android:width="40dp"/>
<padding android:top="2dp" android:bottom="2dp" android:right="2dp" android:left="2dp"/>
<stroke
android:width="3dp"
android:color="#ffffff"/>
</shape>
</item>
<item android:id="@+id/inner">
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size android:height="40dp" android:width="40dp"/>
<solid
android:color="#ffffff"/>
</shape>
</item>
</layer-list>
找到您的看法
LayerDrawable layerDrawable = (LayerDrawable) yourView.getBackground();
GradientDrawable outer = (GradientDrawable) layerDrawable.findDrawableByLayerId(R.id.outer);
GradientDrawable middle = (GradientDrawable) layerDrawable.findDrawableByLayerId(R.id.middle);
GradientDrawable inner = (GradientDrawable) layerDrawable.findDrawableByLayerId(R.id.inner);
设置颜色
outer.setColor(Color.parseColor(#000000));
inner.setColor(Color.parseColor(#FFFFFF));
答案 2 :(得分:0)
您还可以获取视图的可绘制或背景,并将其设置如下。
LayerDrawable layerDrawable = (LayerDrawable) view.getDrawable(); //view.getBackground()
GradientDrawable gradientDrawable = (GradientDrawable) layerDrawable
.findDrawableByLayerId(R.id.layer_list_item_id);
gradientDrawable.setColor(ContextCompat.getColor(getContext(), R.color.colorPrimary));