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copied!<p>You can use js method to load js file and pass url as a parameter from java</p> <p>Here is the full working example </p> <p>[Activity.java]</p> <pre><code>public class MainActivity extends Activity { WebView mWebView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mWebView = (WebView) findViewById(R.id.webview); WebSettings webSettings = mWebView.getSettings(); webSettings.setJavaScriptEnabled(true); mWebView.addJavascriptInterface(new JavaScriptInterface(), "jsinterface"); mWebView.loadUrl("file:///android_asset/sq.html"); } final class JavaScriptInterface { JavaScriptInterface() { } @JavascriptInterface public void windowLoaded() { mWebView.loadUrl("javascript:loadScript('test.js', 'testing')"); Log.i("browser", "browser loaded"); } } } </code></pre> <p>[sq.html]</p> <pre><code><html> <head> <script> onload = function () { window.jsinterface.windowLoaded(); } //JS function loadScript(url, callback) { console.log("loading script " + url); // adding the script tag to the head as suggested before var head = document.getElementsByTagName('head')[0]; var script = document.createElement('script'); script.type = 'text/javascript'; script.src = url; // then bind the event to the callback function // there are several events for cross browser compatibility //script.onreadystatechange = callback; script.onload = callback; // fire the loading head.appendChild(script); } </script> </head> <body>replace this </body> </html> </code></pre> <p>[test.js] inside assets folder</p> <pre><code>document.body.innerHTML = "<p>testing</p>"; </code></pre> <p>on successful execution webview will show testing by loading test.js dynamically.</p>

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