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

<?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/"); 

	}

}