Android WebView 详解及简单实例

<?xml version="1.0" encoding="utf-8"?>
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/webview"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
/>

WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.loadUrl(http://www.example.com);

myWebView.loadUrl(“http://www.google.com“);

myWebView.loadUrl(“file:///android_asset/XX.html“); 

String htmlString = "<h1>Title</h1><p>This is HTML text<br /><i>Formatted in italics</i><br />Anothor Line</p>";
// 载入这个html页面
myWebView.loadData(htmlString, "text/html", "utf-8");

webView = (WebView) findViewById(R.id.wedview);
    WebSettings settings = webView.getSettings();
    //支持js
    settings.setJavaScriptEnabled(true);
    // 安卓为js提供接口
    webView.addJavascriptInterface(new Object(){
      @android.webkit.JavascriptInterface
      private void setinfo(String username,String uclass) {
        // TODO Auto-generated method stub
        Toast.makeText(MainActivity.this,"username:"+username+","+"uclass"+uclass, Toast.LENGTH_SHORT).show();

      }


    }, "javaCode");

webView.loadUrl("http://localhost:8080/jstest.html");

<ProgressBar 
    android:id="@+id/ProgressBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    style="?android:attr/progressBarStyleHorizontal"
    android:visibility="gone"

    />
  <WebView 
    android:id="@+id/wedView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"    
    />

progressBar = (ProgressBar) findViewById(R.id.ProgressBar);
    wedView = (WebView) findViewById(R.id.wedView);
    // 设置作为客户端存在，界面跳转只在自己应用程序中
    wedView.setWebViewClient(new WebViewClient());
    wedView.loadUrl("要显示的网址");
    wedView.setWebChromeClient(new WebChromeClient(){
      @Override
public void onProgressChanged(WebView view, int newProgress) {
        // TODO Auto-generated method stub
  super.onProgressChanged(view, newProgress);
        progressBar.setVisibility(View.VISIBLE);
        //设置进度
        progressBar.setProgress(newProgress);
        // 进度到头，消失
        if (newProgress==100) {
          progressBar.setVisibility(View.GONE);

        }

      }
    });
    //初始化WebView
    initWedSetrings();

public void initWedSetrings(){

    //获取设置的对象
     WebSettings settings = wedView.getSettings();
     //设置wedview的缓存方式，设为默认方式
    // 默认如果有缓存，并且缓存未过期，使用缓存，否则使用网络
     settings.setCacheMode(WebSettings.LOAD_DEFAULT);
     //设置支持js代码
     settings.setJavaScriptEnabled(true);
     //设置缩放模式，缩放到最小
     settings.setDefaultZoom(ZoomDensity.FAR);
     //设置字体大小
     settings.setTextSize(TextSize.SMALLER);

  }

 <uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />
  <uses-permission android:name="android.permission.INTERNET"/>