Question

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <corners android:radius="@dimen/radius_default"/>
    <solid
        android:color="@color/alpha"/>

    <stroke
        android:width="1dp"
        android:color="@color/red"/>

</shape>

我想在运行时更改笔画的颜色。

我使用了这段代码，但它没有用。

Drawable drawable = getResources().getDrawable(R.drawable.border_red);
        drawable.setColorFilter(Color.BLUE), PorterDuff.Mode.SRC_ATOP);
        container.setBackground(drawable);

如何更改笔画的颜色？

        float[] outerR = new float[] { 12, 12, 12, 12, 0, 0, 0, 0 };
        RectF inset = new RectF(6, 6, 6, 6);
        float[] innerR = new float[] { 12, 12, 0, 0, 12, 12, 0, 0 };
        ShapeDrawable biggerCircle = new ShapeDrawable(new RoundRectShape(outerR,inset, innerR));
        biggerCircle.setIntrinsicHeight( 60 );
        biggerCircle.setIntrinsicWidth( 60);
        biggerCircle.setBounds(new Rect(30, 30, 30, 30));
        biggerCircle.getPaint().setColor(Color.BLUE); 
        border.setBackgroundDrawable(biggerCircle);

我还没有重构，但这段代码对我有用。谢谢

Answer 1

运行时形状看起来不像xml那么好，但我们可以创建形状，我们可以改变它的背景颜色和边框颜色。

我创建了一个可能对你有帮助的方法

   public static LayerDrawable getDrawable(Shape shape, int colorBGNormal, int colorBorderNormal, int defaultStrokeWidth) {

    Drawable[] layers = new Drawable[2];
    ShapeDrawable background = new ShapeDrawable();
    ShapeDrawable backgroundBorder = new ShapeDrawable();

    background.setShape(shape);
    background.getPaint().setColor(colorBGNormal);
    background.getPaint().setAntiAlias(true);

    backgroundBorder.setShape(shape);
    backgroundBorder.getPaint().setColor(colorBorderNormal);
    backgroundBorder.getPaint().setStyle(Style.STROKE);
    backgroundBorder.getPaint().setStrokeWidth(defaultStrokeWidth);
    backgroundBorder.getPaint().setAntiAlias(true);

    layers[0] = background;
    layers[1] = backgroundBorder;

    return new LayerDrawable(layers);
}

Answer 2

这个为我工作，给了我圆形的颜色

 ShapeDrawable biggerCircle= new ShapeDrawable( new OvalShape());
                biggerCircle.setIntrinsicHeight( 60 );
                biggerCircle.setIntrinsicWidth( 60);
                biggerCircle.setBounds(new Rect(30, 30, 30, 30));
                biggerCircle.getPaint().setColor(Color.parseColor(first));//you can give any color here
                holder.firstcolor.setBackgroundDrawable(biggerCircle);

Answer 3

首先使用getbackground（）获取Drawable。

Drawable background = imageView.getBackground();


if (background instanceof ShapeDrawable) {
    // cast to 'ShapeDrawable'
    ShapeDrawable shapeDrawable = (ShapeDrawable)background;
    shapeDrawable.getPaint().setColor(getResources().getColor(R.color.colorToSet));
} else if (background instanceof GradientDrawable) {
    // cast to 'GradientDrawable'
    GradientDrawable gradientDrawable = (GradientDrawable)background;
    gradientDrawable.setColor(getResources().getColor(R.color.colorToSet));
}

如何以编程方式更改形状颜色？

3 个答案: