在加载H5页面的时候,可能由于网络、页面内容复杂度等原因,导致加载过程出现空白,加上进度条可以有效提高用户体验
一、自定义ProgressWebView类
public class ProgressWebView extends WebView { private ProgressBar progressbar; public ProgressWebView(Context context, AttributeSet attrs) { super(context, attrs); progressbar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal); progressbar.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 5, 0, 0)); Drawable drawable = context.getResources().getDrawable(R.drawable.progress_bar_states); progressbar.setProgressDrawable(drawable); addView(progressbar); // setWebViewClient(new WebViewClient(){}); setWebChromeClient(new WebChromeClient()); //是否可以缩放 getSettings().setSupportZoom(true); getSettings().setBuiltInZoomControls(true); } public class WebChromeClient extends android.webkit.WebChromeClient { @Override public void onProgressChanged(WebView view, int newProgress) { if (newProgress == 100) { progressbar.setVisibility(GONE); } else { if (progressbar.getVisibility() == GONE) progressbar.setVisibility(VISIBLE); progressbar.setProgress(newProgress); } super.onProgressChanged(view, newProgress); } } @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); } }
二、布局文件标签写成自定义的类,使用和一般WebView一致
最后贴一下drawable下的progress_bar_states
<?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@android:id/background"> <shape> <corners android:radius="2dp" /> <gradient android:angle="270" android:centerColor="#E3E3E3" android:endColor="#E6E6E6" android:startColor="#C8C8C8" /> </shape> </item> <item android:id="@android:id/progress"> <clip> <shape> <corners android:radius="2dp" /> <gradient android:centerColor="#4AEA2F" android:endColor="#31CE15" android:startColor="#5FEC46" /> </shape> </clip> </item> </layer-list>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持亿速云。
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