mWebView = (WebView) findViewById(R.id.wv_content);
mWebView.setVerticalScrollbarOverlay(true);
final WebSettings settings = mWebView.getSettings();
settings.setSupportZoom(true);

//WebView啟用Javascript腳本執(zhí)行
settings.setJavaScriptEnabled(true);
settings.setJavaScriptCanOpenWindowsAutomatically(true);

//映射Java對象到一個名為”js2java“的Javascript對象上
//JavaScript中可以通過"window.js2java"來調(diào)用Java對象的方法
mWebView.addJavascriptInterface(new JSInvokeClass(), "js2java");

/**網(wǎng)頁Javascript調(diào)用接口**/
class JSInvokeClass {
    public void back() {
        activity.finish();
    }
}

window.js2java.back();