流式布局

最新推荐文章于 2024-11-02 14:53:53 发布

jun_qiang

最新推荐文章于 2024-11-02 14:53:53 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/jun_qiang/article/details/88735902

//左边距和上边距
int mleftMargin=20;
int mtopMargin=20;

public MyView(Context context) {
    super(context);
}

public MyView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public MyView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
}



@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    measureChildren(widthMeasureSpec,heightMeasureSpec);
    //定义
    int leftMargin=mleftMargin;
    int topMargin=mtopMargin;


    //布局初始化
    int viewHeigth=0;
    int viewWidth=0;

    //父控件传进来的宽和高度以及对应的测量模式
    int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
    int modewidth = MeasureSpec.getMode(widthMeasureSpec);
    int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
    int modeHeight = MeasureSpec.getMode(heightMeasureSpec);
    switch (modeHeight){
        case MeasureSpec.AT_MOST:
           int measuredHeight =0;
            for (int i = 0; i <getChildCount() ; i++) {
                int measuredWidth = getChildAt(i).getMeasuredWidth();
                    measuredHeight = getChildAt(i).getMeasuredHeight();
                    if(leftMargin+measuredWidth+mleftMargin>getMeasuredWidth()){
                        leftMargin=mleftMargin;
                        topMargin+=measuredHeight+mtopMargin;
                    }
                    leftMargin+=measuredWidth+mleftMargin;
            }
            topMargin+=measuredHeight+mtopMargin;
            break;

    }
    Log.e("aaa",""+topMargin);
    setMeasuredDimension(sizeWidth,topMargin);
}

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    int leftMargin=mleftMargin;
    int topMargin=mtopMargin;
    for (int i = 0; i < getChildCount(); i++) {
        int measuredWidth = getChildAt(i).getMeasuredWidth();
        int measuredHeight = getChildAt(i).getMeasuredHeight();
        if(leftMargin+measuredWidth+mleftMargin>getWidth()){
            leftMargin=mleftMargin;
            topMargin+=measuredHeight+mtopMargin;
            getChildAt(i).layout(leftMargin,topMargin,leftMargin+measuredWidth,topMargin+measuredHeight);
        }else{
           getChildAt(i).layout(leftMargin,topMargin,leftMargin+measuredWidth,topMargin+measuredHeight);
        }
            leftMargin+=measuredWidth+mleftMargin;
    }
}