webview添加网页加载进度条
最近在android项目中使用webview嵌套了一个抽奖活动网页，活动上线，运行良好（改了N次需求和突发bug)，还好这种模式的活动，只需要修改网页，不需要重新打包发布市场，这也是这种模式开发的优势之一。后来据产品哥反馈说加载网页无进度提示，好吧，这个当时真没考虑这么多，这个要加加..想当然以为轻松搞定之....其实还是比轻松要复杂点...
1、首先自定义一个WebView控件
1 /** 2 * 带进度条的Webivew 3 * @author lirunzi@163.com 4 */ 5 @SuppressWarnings("deprecation") 6 public class ProgressWebView extends WebView { 7 private final static String TAG = ProgressWebView.class.getSimpleName(); 8 9 private ProgressBar progressBar; 10 private Context context; 11 12 public ProgressWebView(Context context, AttributeSet attrs) { 13 super(context, attrs); 14 this.context = context; 15 progressBar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal); 16 progressBar.setLayoutParams(new AbsoluteLayout.LayoutParams(AbsoluteLayout.LayoutParams.MATCH_PARENT, 3, 0, 0)); 17 progressBar.setProgressDrawable(getResources().getDrawable(R.drawable.wevbview_progressbar)); 18 addView(progressBar); 19 setWebChromeClient(new WebChromeClient()); 20 } 21 22 public class WebChromeClient extends android.webkit.WebChromeClient { 23 @Override 24 public void onProgressChanged(WebView view, int newProgress) { 25 Log.d(TAG, "newProgress" + newProgress); 26 if (newProgress == 100) { 27 progressBar.setVisibility(GONE); 28 } else { 29 if (progressBar.getVisibility() == GONE) 30 progressBar.setVisibility(VISIBLE); 31 progressBar.setProgress(newProgress); 32 } 33 super.onProgressChanged(view, newProgress); 34 } 35 36 // 处理javascript中的console.log 37 @Override 38 public boolean onConsoleMessage(ConsoleMessage cm){ 39 android.util.Log.d(TAG, "webview console " + cm.lineNumber() + " of " + cm.sourceId() + " : " + cm.message()); 40 return true; 41 } 42 43 // 处理javascript中的alert() 44 @Override 45 public boolean onJsAlert(WebView view, String url, String message, JsResult result) { 46 ToastUtil.showMessage(context, message, Toast.LENGTH_SHORT, Gravity.CENTER); 47 result.cancel(); 48 return true; 49 } 50 51 } 52 53 @Override 54 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 55 LayoutParams lp = (LayoutParams) progressBar.getLayoutParams(); 56 lp.x = l; 57 lp.y = t; 58 progressBar.setLayoutParams(lp); 59 super.onScrollChanged(l, t, oldl, oldt); 60 } 61 }
2、在需要使用webview的layout文件中引入这个控件
1 <cn.net.huami.ui.view.ProgressWebView 2 android:id="@+id/them_webview" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" />
3、添加个drawable文件，修改progress控制的进度条样式
1 <?xml version="1.0" encoding="utf-8"?> 2 <layer-list xmlns:android="http://schemas.android.com/apk/res/android" > 3 <!-- 背景 --> 4 <item android:id="@android:id/background"> 5 <shape> 6 <solid android:color="@color/default_bg" /> 7 </shape> 8 </item> 9 <!-- 进度条 --> 10 <item android:id="@android:id/progress"> 11 <clip> 12 <shape> 13 <solid android:color="#2E8AE7" /> 14 </shape> 15 </clip> 16 </item> 17 </layer-list>
4、在activity或fragment中使用这个控件的相关代码
1 ProgressWebView webView = (ProgressWebView)findViewById(R.id.them_webview); 2 3 webView.setDownloadListener(new DownloadListener() { 4 @Override 5 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) { 6 if (url != null && url.startsWith("http://")) 7 startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url))); 8 } 9 }); 10 webView.loadUrl("网页url");
