Android WebView线性进度条实例详解

前端技术 2023/09/04 Android

推荐阅读：Android Webview添加网页加载进度条实例详解

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。

本文地址：https://www.stayed.cn/item/9659

转载请注明出处。

本站部分内容来源于网络,如侵犯到您的权益,请 联系我

我的博客

人生若只如初见，何事秋风悲画扇。

我的标签

随笔档案