android - 仅设置 webViewClient 会导致在 webview 中打开链接

Question

通常，当在 WebView 中单击链接时， Intent 会导致 Web 浏览器或支持该 Intent 的其他 Activity 打开。

WebView webView = new WebView(this);
setContentView(webView);
webView.loadUrl("http://google.com");

但是，当我只设置一个空的 WebViewClient 时......

WebView webView = new WebView(this);
webView.setWebViewClient(new WebViewClient() {});
setContentView(webView);
webView.loadUrl("http://google.com");

…链接在 WebView 中打开并且没有触发任何 Intent !怎么会？

Answer 1

这是设计使然。

http://developer.android.com/guide/webapps/webview.html#HandlingNavigation

To open links clicked by the user, simply provide a WebViewClient for your WebView, using setWebViewClient(). For example:

WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.setWebViewClient(new WebViewClient());

That's it. Now all links the user clicks load in your WebView.

和

http://developer.android.com/reference/android/webkit/WebViewClient.html#shouldOverrideUrlLoading(android.webkit.WebView, java.lang.String)

If WebViewClient is not provided, by default WebView will ask Activity Manager to choose the proper handler for the url. If WebViewClient is provided, return true means the host application handles the url, while return false means the current WebView handles the url

shouldOverrideUrlLoading 默认返回 false