layout_margintop 百分比_layout marginleft_layout marginend用法(9)

继续看，IMPL.getMeasuredWidthAndState()，方法其实最终就是使用的BaseViewCompatImpl.getMeasuredWidthAndState()方法，接着看它的的源码:

 @Override
        public int getMeasuredWidthAndState(View view) {
            return view.getMeasuredWidth();
        }

最后就是调用了getMeasuredWidth()方法。 没毛病- -!

onMeasure的到这里就分析完了。

那接着来看一下onLayout方法,onLayout方法直接调用了PercentLayoutHelper.restoreOriginalParams，:

/**
     * Iterates over children and restores their original dimensions that were changed for
     * percentage values. Calling this method only makes sense if you previously called
     * {@link PercentLayoutHelper#adjustChildren(int, int)}.
     */
    public void restoreOriginalParams() {
        for (int i = 0, N = mHost.getChildCount(); i < N; i++) {
            View view = mHost.getChildAt(i);
            ViewGroup.LayoutParams params = view.getLayoutParams();
            if (Log.isLoggable(TAG, Log.DEBUG)) {
                Log.d(TAG, "should restore " + view + " " + params);
            }
            if (params instanceof PercentLayoutParams) {
                PercentLayoutInfo info =
                        ((PercentLayoutParams) params).getPercentLayoutInfo();
                if (Log.isLoggable(TAG, Log.DEBUG)) {
                    Log.d(TAG, "using " + info);
                }
                if (info != null) {
                    if (params instanceof ViewGroup.MarginLayoutParams) {
                        info.restoreMarginLayoutParams((ViewGroup.MarginLayoutParams) params);
                    } else {
                        info.restoreLayoutParams(params);
                    }
                }
            }
        }
    }

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