javascript 警报不是从 android 的 web 视图中出现的吗？
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Alert is not appear from web view in android?
提问by Karthi
I use the sample provided by Googlefor demonstrating two way communication between JavaScript and Java ,
我使用Google提供的示例来演示 JavaScript 和 Java 之间的两种通信方式，
ref[1]:
参考文献[1]：
The functionality is working fine. I am able to call JavaScript function from Java and callback the Java function from JavaScript.
该功能运行良好。我能够从 Java 调用 JavaScript 函数并从 JavaScript 回调 Java 函数。
The problem is when I use an alert inside a JavaScript function it won`t appear, but the functionality inside the function is working properly.
问题是当我在 JavaScript 函数中使用警报时，它不会出现，但函数内部的功能正常工作。
Why does alert("test")inside a JavaScript function not appear in Android.
I load the JavaScript in a web-view. When I a clicking button in Android
I call the function, but it does not appear.
为什么alert("test")在 Android 中没有出现 JavaScript 函数内部。我将 JavaScript 加载到web-view. 当我在 Android 中单击按钮时，我调用了该函数，但它没有出现。
If anyone knows the problem, pealse help me out.
如果有人知道这个问题，请帮助我。
Thanks
谢谢
回答by Android
setContentView(R.layout.main);
WebView webview = (WebView) findViewById(R.id.webview);
WebSettings webSettings = webview.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setBuiltInZoomControls(true);
webview.requestFocusFromTouch();
webview.setWebViewClient(new WebViewClient());
webview.setWebChromeClient(new WebChromeClient());
webview.loadUrl("file:///android_asset/test.html");
this code working perfect and shows me alert box..
and this is my
test.html
这段代码完美运行并显示了警告框..这是我的
test.html
<html>
<head>
<script type="text/javascript">
function show_alert()
{
alert("Hello! I am an alert box!");
}
</script>
</head>
<body>
<input type="button" onclick="show_alert()" value="Show alert box" />
</body>
</html>
回答by Md Nawaz
By adding the following two lines, my JavaScript works:
通过添加以下两行，我的 JavaScript 可以工作：
mWebview.setWebViewClient(new WebViewClient()());
mWebview.setWebChromeClient(new WebChromeClient());
回答by Rohith Murali
Use the following mehtod,
使用以下方法，
WebView wv=new WebView(this);
wv.setWebChromeClient(new WebChromeClient() {
@Override
public boolean onJsAlert(WebView view, String url, String message,JsResult result) {
//Required functionality here
return super.onJsAlert(view, url, message, result);
}
回答by Chandan kushwaha
Just use WebChromeClient. It will do everything.
只需使用 WebChromeClient。它会做一切。
mWebview.setWebChromeClient(new WebChromeClient());
It will work.
它会起作用。
