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POAndroid Calling JavaScript functions in WebView
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  1. POAndroid Calling JavaScript functions in WebView
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    copied!<p>I am trying to call some <code>javascript</code> functions sitting in an <code>html</code> page running inside an <code>android webview</code>. Pretty simple what the code tries to do below - from the android app, call a <code>javascript</code> function with a test message, which inturn calls a java function back in the android app that displays test message via toast.</p> <p>The <code>javascript</code> function looks like:</p> <pre><code>function testEcho(message){ window.JSInterface.doEchoTest(message); } </code></pre> <p>From the WebView, I have tried calling the <code>javascript</code> the following ways with no luck:</p> <pre><code>myWebView.loadUrl("javascript:testEcho(Hello World!)"); mWebView.loadUrl("javascript:(function () { " + "testEcho(Hello World!);" + "})()"); </code></pre> <p>I did enable <code>javascript</code> on the <code>WebView</code></p> <pre><code>myWebView.getSettings().setJavaScriptEnabled(true); // register class containing methods to be exposed to JavaScript myWebView.addJavascriptInterface(myJSInterface, "JSInterface"); </code></pre> <p>And heres the <code>Java</code> Class</p> <pre><code>public class JSInterface{ private WebView mAppView; public JSInterface (WebView appView) { this.mAppView = appView; } public void doEchoTest(String echo){ Toast toast = Toast.makeText(mAppView.getContext(), echo, Toast.LENGTH_SHORT); toast.show(); } } </code></pre> <p>I've spent a lot of time googling around to see what I may be doing wrong. All examples I have found use this approach. Does anyone see something wrong here?</p> <p><strong>Edit:</strong> There are several other external <code>javascript</code> files being referenced &amp; used in the <code>html</code>, could they be the issue?</p>
 

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