ProgressWebView.java

package com.jiuqi.ui.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.webkit.WebView;
import android.widget.ProgressBar;

/**
 * 带进度条的WebView
 * @author 农民伯伯
 * @see http://www.cnblogs.com/over140/archive/2013/03/07/2947721.html
 * 
 */
@SuppressWarnings("deprecation")
public class ProgressWebView extends WebView{

	private ProgressBar progressbar;

	public ProgressWebView(Context context, AttributeSet attrs){
		super(context, attrs);
		progressbar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal);
		progressbar.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 3, 0, 0));
		addView(progressbar);
		setWebChromeClient(new WebChromeClient());
	}

	public class WebChromeClient extends android.webkit.WebChromeClient{
		@Override
		public void onProgressChanged(WebView view, int newProgress){
			if(newProgress == 100){
				progressbar.setVisibility(GONE);
			}
			else{
				if(progressbar.getVisibility() == GONE) progressbar.setVisibility(VISIBLE);
				progressbar.setProgress(newProgress);
			}
			super.onProgressChanged(view, newProgress);
		}

	}

	@Override
	protected void onScrollChanged(int l, int t, int oldl, int oldt){
		LayoutParams lp = (LayoutParams)progressbar.getLayoutParams();
		lp.x = l;
		lp.y = t;
		progressbar.setLayoutParams(lp);
		super.onScrollChanged(l, t, oldl, oldt);
	}
}