以编程方式创建 ShapeDrawable

Question

我正在尝试以编程方式创建 ShapeDrawable，但以下代码没有显示任何内容。

ImageView image = new ImageView (context);
image.setLayoutParams (new LayoutParams (200, 200));
ShapeDrawable badge = new ShapeDrawable (new OvalShape());
badge.setBounds (0, 0, 200, 200);
badge.getPaint().setColor(Color.RED);
ImageView image = new ImageView (context);
image.setImageDrawable (badge);
addView (image);

我可以使用 xml。

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <size
        android:width="200px"
        android:height="200px" />
    <solid
        android:color="#F00" />
</shape>

ImageView image = new ImageView (context);
image.setLayoutParams (new LayoutParams (200, 200));
image.setImageResource (R.drawable.badge);
addView (image);

但我想以编程方式创建它。 xml 工作得很好，所以问题不可能出在 ImageView 上，一定是在创建 ShapeDrawable 时。

Answer 1

您可能需要创建一个 Class 扩展 ShapeDrawable 以覆盖 onDraw，然后创建一个 class.

的实例

示例：（Source - 查看 link 以获得完整示例）

private static class MyShapeDrawable extends ShapeDrawable {
            private Paint mStrokePaint = new Paint(Paint.ANTI_ALIAS_FLAG);

            public MyShapeDrawable(Shape s) {
                super(s);
                mStrokePaint.setStyle(Paint.Style.STROKE);
            }

            public Paint getStrokePaint() {
                return mStrokePaint;
            }

            @Override protected void onDraw(Shape s, Canvas c, Paint p) {
                s.draw(c, p);
                s.draw(c, mStrokePaint);
            }
        }

Answer 2

使用 setIntrinsicWidth 和 setIntrinsicHeight 而不是 setBounds 来设置宽度和高度。

ImageView image = new ImageView (context);
image.setLayoutParams (new LayoutParams (200, 200));
ShapeDrawable badge = new ShapeDrawable (new OvalShape());
badge.setIntrinsicWidth (200);
badge.setIntrinsicHeight (200);
badge.getPaint().setColor(Color.RED);
image.setImageDrawable (badge);
addView (image);

以编程方式创建 ShapeDrawable

Programmatically create ShapeDrawable

android

drawable