android的进度条使用

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

[html]
<?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

[html]
<?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(进度条加载完成后使用动画渐退)

[java]
/**
* MyWebChromeClient.java
* 版权所有(C) 2012
[java] view plaincopy
* 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);
        // 运行动画
         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

[html]
<?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
[java]
/**
* ProgressActivity.java
* 版权所有(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
补充：移动开发 , Android ,