android的进度条

1、实现的效果

2、布局代码

先写一个my_browser.xml文件 存放WebView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <WebView
        android:id="@+id/webView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />
</LinearLayout>

进度条布局

然后写一个broser.xml存放进度条的

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent"
android:layout_height="fill_parent">
	<TextView
	android:id="@+id/tvtitle"
	android:layout_width="fill_parent"
	android:layout_height="wrap_content"
	android:focusableInTouchMode="true"
	android:singleLine="true"
	android:ellipsize="marquee"
	android:focusable="false"
	android:marqueeRepeatLimit="marquee_forever"
	android:textSize="20sp" android:layout_centerVertical="true"/>
	<ProgressBar
		android:id="@+id/pb"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		style="?android:attr/progressBarStyleHorizontal"
		android:visibility="gone"
		android:layout_alignParentBottom="true" >
	</ProgressBar> 

</RelativeLayout>

WebChromeClient

重写onProgressChanged和onReceivedTitle事件(进度条载入完毕后使用动画渐退)

/**
 * MyWebChromeClient.java
 * 版权全部(C) 2012 

 * 创建:cuiran 2012-10-16 下午3:05:34
 */
package com.cayden.citygirl.activity;

import android.app.Activity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.widget.ProgressBar;
import android.widget.TextView;

/**
 * TODO
 * @author cuiran
 * @version TODO
 */
public class MyWebChromeClient extends WebChromeClient {

	private Activity activity; 

	private ProgressBar pb; 

	private Animation animation; 

	private TextView tvtitle; 

	public MyWebChromeClient(Activity activity) { 

		this.activity = activity; 

	} 

	@Override
	public void onProgressChanged(WebView view, int newProgress) {
		pb=(ProgressBar)activity.findViewById(R.id.pb);
		pb.setMax(100);
		if(newProgress<100){
		if(pb.getVisibility()==View.GONE) pb.setVisibility(View.VISIBLE);
		pb.setProgress(newProgress);
		}else{
		pb.setProgress(100);
		animation=AnimationUtils.loadAnimation(activity, R.anim.animation);
		// 执行动画
		 pb.startAnimation(animation);
		// 将 spinner 的可见性设置为不可见状态
		pb.setVisibility(View.INVISIBLE);
		}
		super.onProgressChanged(view, newProgress);
	}
	@Override
	public void onReceivedTitle(WebView view, String title) { 

		tvtitle=(TextView)activity.findViewById(R.id.tvtitle); 

		tvtitle.setText(title);
		super.onReceivedTitle(view, title);

	} 

}

进度条的动画样式 res/anim/animation.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha android:fromAlpha="1.0"
android:toAlpha="0.0"
android:duration="700"/>
</set>

5、程序启动类

/**
 * ProgressActivity.java
 * 版权全部(C) 2012
 * 创建:cuiran 2012-10-16 下午3:13:49
 */
package com.cayden.citygirl.activity;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.webkit.WebView;

/**
 * TODO
 * @author cuiran
 * @version TODO
 */
public class ProgressActivity extends Activity {

	private WebView browser;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
	getWindow().requestFeature(Window.FEATURE_CUSTOM_TITLE); 

	setContentView(R.layout.my_browser); 

	getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.broser);

	browser = (WebView) findViewById(R.id.webView); 

	// currentWebView=browser; 

	browser.setWebChromeClient(new MyWebChromeClient(ProgressActivity.this)); 

	browser.loadUrl("http://shop.paipai.com/731681975/"); 

	}

}