测量“确定”按钮时的ViewGroup onLayout问题

问题描述

我通过扩展了ViewGroup 创建了键盘。我在 onLayout（）方法上遇到问题。我要将确定按钮从一个正方形更改为三个正方形。怎么做？

public class KeyboardVolume extends ViewGroup {

    @Override
    protected void onLayout(boolean c,int l,int t,int r,int b) {
        int height = b - t;           // view height = view bottom - view top
        int width = r - l;            // view width = view right - view left
        int rows = 4;                 // rows count (4 keys)
        int colums = 4;               // columns count (4 keys)
        int gridW = (width / colums); // key width
        int gridH = (height / rows);  // key height
        int left;
        int top = 1;
        int count = 0;

        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < colums; j++) {
                count++;
                int id = (i * colums) + j;
                View child = this.getChildAt(id);
                if (child == null) {
                    return;
                }
                left = j * (gridW + 1);
                if (gridW != child.getMeasuredWidth() || gridH != child.getMeasuredHeight()) {
                    child.measure(makeMeasureSpec(gridW,EXACTLY),makeMeasureSpec(gridH,EXACTLY));
                }
                if (count < (rows * colums)) {
                    child.layout(left,top,left + gridW,top + gridH);
                } else {
                    left -= 1;
                    top -= 1;
                    child.layout(left,top + gridH);
                }
            }
            top += gridH + 1;
        }
    }

}

以上代码的输出为

预期输出为

解决方法

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