Android WebView线性进度条实例详解

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先给大家展示下效果图：这个效果图大家一看就懂，在生活经常见到

1.wevbview_progressbar.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" > 
<!-- 背景 --> 
<item android:id="@android:id/background"> 
<shape> 
<solid android:color="@android:color/transparent" /> 
</shape> 
</item> 
<!-- 进度条 --> 
<item android:id="@android:id/progress"> 
<clip> 
<shape> 
<solid android:color="@android:color/holo_green_light" /> 
</shape> 
</clip> 
</item>
</layer-list> 

2.progresswebview.java

@suppresswarnings("deprecation")public class progresswebview extends webview 
{ 
private final static string tag = progresswebview.class.getsimplename(); 
private progressbar progressbar; 
private context context; 
public progresswebview(context context, attributeset attrs) 
{ 
super(context, attrs); 
this.context = context; 
progressbar = new progressbar(context, null, android.r.attr.progressbarstylehorizontal); 
progressbar.setlayoutparams(new absolutelayout.layoutparams(absolutelayout.layoutparams.match_parent, 3, 0, 0)); progressbar.setprogressdrawable(getresources().getdrawable(r.drawable.wevbview_progressbar)); 
addview(progressbar); 
setwebchromeclient(new webchromeclient()); 
} 
public class webchromeclient extends android.webkit.webchromeclient 
{ 
@override 
public void onprogresschanged(webview view, int newprogress) 
{ 
log.d(tag, "newprogress" + newprogress); 
if (newprogress == 100) 
{ 
progressbar.setvisibility(gone); 
} 
else 
{ 
if (progressbar.getvisibility() == gone) 
progressbar.setvisibility(visible); 
progressbar.setprogress(newprogress); 
} 
super.onprogresschanged(view, newprogress); 
} 
// 处理javascript中的console.log 
@override 
public boolean onconsolemessage(consolemessage cm)
{ 
android.util.log.d(tag, "webview console " + cm.linenumber() + " of " + cm.sourceid() + " : " + cm.message()); 
return true; 
} // 处理javascript中的alert() 
@override 
public boolean onjsalert(webview view, string url, string message, jsresult result) 
{ 
result.cancel(); 
return true; 
} 
} 
@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); 
}} 

3.mainactivity.java

progresswebview webview = (progresswebview)findviewbyid(r.id.them_webview);webview.setdownloadlistener(new downloadlistener()
{ 
@override 
public void ondownloadstart(string url, string useragent, string contentdisposition, string mimetype, long contentlength) 
{ 
if (url != null && url.startswith("http://")) 
startactivity(new intent(intent.action_view, uri.parse(url))); 
}});webview.loadurl("http://www.cnblogs.com/hubli/p/4835549.html"); 

4.activity_main.xml

<com.etoury.webviewprogress.progresswebview 
android:id="@+id/them_webview" 
android:layout_width="match_parent" 
android:layout_height="match_parent" />

通过以上代码内容给大家介绍了android webview线性进度条的相关知识，希望对大家有所帮助。