ExpandableHeightListView.java

/*
 * This is the source code of DMPLayer for Android v. 1.0.0.
 * You should have received a copy of the license in this archive (see LICENSE).
 * Copyright @Dibakar_Mistry, 2015.
 */
package com.dmplayer.uicomponent;

import android.content.Context;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.ListView;

public class ExpandableHeightListView extends ListView {

	boolean expanded = true;

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

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

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

	public boolean isExpanded() {
		return expanded;
	}

	@Override
	public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		// HACK! TAKE THAT ANDROID!
		if (isExpanded()) {
			// Calculate entire height by providing a very large height hint.
			// View.MEASURED_SIZE_MASK represents the largest height possible.
			int expandSpec = MeasureSpec.makeMeasureSpec(MEASURED_SIZE_MASK, MeasureSpec.AT_MOST);
			super.onMeasure(widthMeasureSpec, expandSpec);

			ViewGroup.LayoutParams params = getLayoutParams();
			params.height = getMeasuredHeight();
		} else {
			super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		}
	}

	public void setExpanded(boolean expanded) {
		this.expanded = expanded;
	}
}