WebView中js调用java

记录下，等会在加上一个js传多个参数的代码。代码很简单，是调用QR扫描器的一个事件。

<li><a id="guide" href="javascript:window.oa_main.qr_scan()">
<img src="./img/iLeopauR.png" alt="Guide" height="72" width="72" />
<span>二维码扫描</span>
</a></li>

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.main);
		// this.initContacts();
		web = (WebView) this.findViewById(R.id.web);
		web.getSettings().setAllowFileAccess(true);
		this.web.getSettings().setSupportZoom(false);
		this.web.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
		this.web.setScrollBarStyle(SCROLLBARS_OUTSIDE_OVERLAY);
		web.getSettings().setJavaScriptEnabled(true);
		
		// web.setWebChromeClient(new MyWebChromeClient());
		web.addJavascriptInterface(new MyJavaScriptInterface(), "oa_main"); // 定义oa_main,为OA面板使用
		
		//web.addJavascriptInterface(new OaSystemInterface(), "oa_sys"); //注册和登录js接口
		web.loadUrl("file:///android_asset/index.html");
		super.onStart();
	}
	final class MyJavaScriptInterface {
		MyJavaScriptInterface(){}
        public void qr_scan() {
			Intent intent = new Intent("com.google.zxing.client.android.SCAN_bluehood");
			startActivityForResult(intent,BARCODE);
		}
 }