android webview onJsAlert 注意事項

最近在使用 WebView 的 onJsAlert 方法後，發現html頁面點擊沒反應了，代碼如下：

mWebView.setWebChromeClient(new WebChromeClient(){@Overridepublic boolean onJsAlert(WebView view, String url, String message,JsResult result) {if(message!=null){//TODO//彈出對話方塊Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();}return true;}@Overridepublic boolean onJsConfirm(WebView view, String url,String message, JsResult result) {// TODO Auto-generated method stubreturn super.onJsConfirm(view, url, message, result);}@Overridepublic boolean onJsPrompt(WebView view, String url, String message,String defaultValue, JsPromptResult result) {// TODO Auto-generated method stubreturn super.onJsPrompt(view, url, message, defaultValue, result);}});

百思不得其解，最後在stackoverflow上找到了答案

http://stackoverflow.com/questions/15892644/android-webview-after-onjsalert-not-responding-taps

mWebView.setWebChromeClient(new WebChromeClient(){@Overridepublic boolean onJsAlert(WebView view, String url, String message,JsResult result) {if(message!=null){//TODO//彈出對話方塊Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();}result.cancel();//一定要cancel，否則會出現各種奇怪問題return true;}@Overridepublic boolean onJsConfirm(WebView view, String url,String message, JsResult result) {// TODO Auto-generated method stubreturn super.onJsConfirm(view, url, message, result);}@Overridepublic boolean onJsPrompt(WebView view, String url, String message,String defaultValue, JsPromptResult result) {// TODO Auto-generated method stubreturn super.onJsPrompt(view, url, message, defaultValue, result);}});

return true 和 result.cancel(); 一個都不能少，否則會出現各種奇怪的問題。