java 如何在 Android 中以编程方式更改形状的笔触宽度？
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How to change the stroke width of a shape programmatically in Android?
提问by Taha K?rkem
This is circle.xml
这是 circle.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid android:color="#00000000"/>
<padding android:left="30dp" android:top="30dp"
android:right="30dp" android:bottom="30dp" />
<stroke android:color="#439CC8" android:width="7dp" />
</shape>
This is my code:
这是我的代码：
textview.setBackgroundResource(R.drawable.circle);
I want to change the stroke thickness in my java code. How can I change it programmatically?
我想在我的 java 代码中更改笔画粗细。如何以编程方式更改它？
采纳答案by browep
You may need to create it programmatically
您可能需要以编程方式创建它
ShapeDrawable circle = new ShapeDrawable( new OvalShape() );
you need to set the properties after this, ( padding, color, etc) then change its stroke
您需要在此之后设置属性（填充、颜色等），然后更改其笔划
circle.getPaint().setStrokeWidth(12);
then set it as the background for the view
然后将其设置为视图的背景
textview.setBackgroundDrawable(circle);
回答by eldivino87
Do like this:
这样做：
1) Get the TextViewusing the usual findViewById():
1）获取TextView使用通常的findViewById()：
TextView textView = (TextView) rootView.findViewById(R.id.resourceName);
2) Get the Drawablefrom TextViewusing getBackground()and cast it to GradientDrawable:
2）Drawable从TextViewusing 中获取getBackground()并将其转换为GradientDrawable：
GradientDrawable backgroundGradient = (GradientDrawable) textView.getBackground();
3) Apply it a stroke using setStroke()method (pass it the width in pixel and the color):
3）使用setStroke()方法将其应用为笔触（以像素和颜色为单位传递宽度）：
backgroundGradient.setStroke(5, Color.BLACK);
Whole code:
全码：
TextView textView = (TextView) rootView.findViewById(R.id.resourceName);
GradientDrawable backgroundGradient = (GradientDrawable) textView.getBackground();
backgroundGradient.setStroke(5, Color.BLACK);
