FixedLayout.java

package org.protocoderrunner.apprunner.api.widgets;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;

public class FixedLayout extends ViewGroup {

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

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        measureChildren(widthMeasureSpec, heightMeasureSpec);

        int width = 0;
        int height = 0;

        int count = getChildCount();
        for (int i = 0; i < count; i++) {
            View child = getChildAt(i);
            if (child.getVisibility() != GONE) {
                FixedLayout.LayoutParams lp = (FixedLayout.LayoutParams) child.getLayoutParams();
                int right = lp.x + child.getMeasuredWidth();
                int bottom = lp.y + child.getMeasuredHeight();
                width = Math.max(width, right);
                height = Math.max(height, bottom);
            }
        }

        height = Math.max(height, getSuggestedMinimumHeight());
        width = Math.max(width, getSuggestedMinimumWidth());
        width = resolveSize(width, widthMeasureSpec);
        height = resolveSize(height, heightMeasureSpec);
        setMeasuredDimension(width, height);

    }

    @Override
    protected ViewGroup.LayoutParams generateDefaultLayoutParams() {
        return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 0, 0);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int count = getChildCount();
        for (int i = 0; i < count; i++) {
            View child = getChildAt(i);
            if (child.getVisibility() != GONE) {
                FixedLayout.LayoutParams lp = (FixedLayout.LayoutParams) child.getLayoutParams();
                child.layout(lp.x, lp.y, lp.x + child.getMeasuredWidth(), lp.y + child.getMeasuredHeight());
            }
        }
    }

    @Override
    protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
        return p instanceof FixedLayout.LayoutParams;
    }

    @Override
    protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
        return new LayoutParams(p);
    }

    public static class LayoutParams extends ViewGroup.LayoutParams {

        public int x;
        public int y;

        public LayoutParams(int width, int height, int x, int y) {
            super(width, height);
            this.x = x;
            this.y = y;
        }

        public LayoutParams(ViewGroup.LayoutParams source) {
            super(source);
        }

    }
}