webjs与Android(网页和安卓)交互

来源：互联网发布：吉首大学网络授课编辑：程序博客网时间：2024/05/22 12:49

把网页文件放在main文件夹下assets里面

web部分代码:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>调用Android组件测试</title>
<script type="text/javascript">
    function show(info){
        document.getElementById("shows").innerHTML = info;
    }
</script>
</head>

<body>
<b>测试</b>
<br />
<button onClick="window.hello.javaMethod('param')">启动hello world Activity</button>
<br />
<hr color="#99FF00"/>
<button onClick="window.hello.showAndroid()">显示android内容</button>
<br />
<textarea id= "shows" cols="20" rows="10"> 暂无记录 </textarea>
<br />

</body>
</html>

Android部分代码:

public class MainActivity extends Activity {

   private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //资源ID
        webView = (WebView) findViewById(R.id.web);
        //记载页面
        webView.loadUrl("file:///android_asset/Untitled1.html");

        //支持js交互
        webView.getSettings().setJavaScriptEnabled(true);
        /**
         * 1.JavaScript对象
         * 2.别名在交互是 htmel中会使用
         *
         */
        webView.addJavascriptInterface(this, "test");



        //设置编码格式
        webView.getSettings().setDefaultTextEncodingName("utf-8");
        webView.setWebChromeClient(new WebChromeClient(){
           //得到页面的标题
           @Override
           public void onReceivedTitle(WebView view, String title) {
               // TODO Auto-generated method stub
               super.onReceivedTitle(view, title);
           }
           //得到当前页面加载的进度
           @Override
           public void onProgressChanged(WebView view, int newProgress) {
               // TODO Auto-generated method stub
               super.onProgressChanged(view, newProgress);
           }
        });

        webView.setWebViewClient(new WebViewClient(){
           //页面正在加载
           @Override
           public void onPageStarted(WebView view, String url, Bitmap favicon) {
               // TODO Auto-generated method stub
               super.onPageStarted(view, url, favicon);
           }
           //页面加载完成
           @Override
           public void onPageFinished(WebView view, String url) {
               // TODO Auto-generated method stub
               super.onPageFinished(view, url);
           }

        });
    }

    public void butCallJsMethod(View v){
       //交互 Android向Html传值
       webView.loadUrl("javascript:androidCallJsMethod('杨栓国民老公')");

    }
    //接受html传来的值
    @JavascriptInterface   //注解必须要加
    public void sayHello(String name){
       Toast.makeText(MainActivity.this, name, 1).show();
    }

}

阅读全文

1 0