WorkaroundPercentRelativeLayout.java

import android.content.Context;
import android.support.percent.PercentLayoutHelper;
import android.support.percent.PercentRelativeLayout;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

/**
 * Workaround for Issue 186498
 */
public class WorkaroundPercentRelativeLayout extends PercentRelativeLayout {
    int mLastWidthMeasureSpec, mLastHeightMeasureSpec;

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

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

    public WorkaroundPercentRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        mLastHeightMeasureSpec = heightMeasureSpec;
        mLastWidthMeasureSpec = widthMeasureSpec;
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        if (oldh == 0 && oldw == 0) {
            return;
        }
        boolean reMeasure = false;
        for (int i = 0, N = getChildCount(); i < N; i++) {
            View view = getChildAt(i);
            ViewGroup.LayoutParams params = view.getLayoutParams();
            if (params instanceof PercentLayoutHelper.PercentLayoutParams) {
                PercentLayoutHelper.PercentLayoutInfo info =
                        ((PercentLayoutHelper.PercentLayoutParams) params).getPercentLayoutInfo();
                if (info.widthPercent < 0 && info.heightPercent > 0 && info.aspectRatio > 0) {
                    if (params.width != 0) {
                        params.width = 0;
                        reMeasure = true;
                    }

                }
                if (info.heightPercent < 0 && info.widthPercent > 0 && info.aspectRatio > 0) {
                    if (params.height != 0) {
                        params.height = 0;
                        reMeasure = true;
                    }
                }

            }
        }
        if (reMeasure) {
            measure(mLastWidthMeasureSpec, mLastHeightMeasureSpec);
        }
    }
}