Android在画布中使用Stroke绘制自定义形状

public class CustomShapeView extends View {
    private Paint mPaint;
    private Path mPath;

    public CustomShapeView(Context context) {
        super(context);
        init();
    }

    public CustomShapeView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CustomShapeView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setColor(Color.BLACK);
        mPaint.setStrokeWidth(5);

        mPath = new Path();
        // 在Path对象中定义自定义形状的路径，例如绘制一个矩形
        mPath.addRect(100, 100, 300, 300, Path.Direction.CW);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        // 绘制自定义形状的边框
        canvas.drawPath(mPath, mPaint);
    }
}