创建不需要在XML中设置layout_width/height的自定义视图

public class CustomView extends View {
    public CustomView(Context context) {
        super(context);
        // 设置视图的宽度和高度
        setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // 在onMeasure方法中测量视图的宽度和高度
        int width = measureWidth(widthMeasureSpec);
        int height = measureHeight(heightMeasureSpec);
        setMeasuredDimension(width, height);
    }

    private int measureWidth(int measureSpec) {
        int result = 0;
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);

        if (specMode == MeasureSpec.EXACTLY) {
            // 确定模式下，直接使用指定的尺寸
            result = specSize;
        } else {
            // 非确定模式下，根据视图的内容计算尺寸
            // TODO: 根据视图的内容计算宽度
        }

        return result;
    }

    private int measureHeight(int measureSpec) {
        // 类似measureWidth方法，根据需要实现
        return 0;
    }
}