I have already seen a similar question in stackoverflow, but I want a better explained answer to this question. I am new to android development and I am trying to figure out how to pass a variable in my java code to the javascript in index.html. Any suggestions are welcomed.
2 Answers
You could try to use JsBridge library:
https://github.com/lzyzsd/JsBridge
Comments
Try with the following code may be it will help you.
//Android WebView code
JavaScriptInterface JSInterface;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
wv = (WebView)findViewById(R.id.webView1);
wv.getSettings().setJavaScriptEnabled(true);
// register class containing methods to be exposed to JavaScript
JSInterface = new JavaScriptInterface();
wv.addJavascriptInterface(JSInterface, "JSInterface");
wv.loadUrl("file:///android_asset/myPage.html");
}
public class JavaScriptInterface {
@android.webkit.JavascriptInterface
public void showToast(String msg)
{
Log.d("TAG",msg);
}
}
//This is your web page
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
function init()
{
var testVal = 'Android Toast!’;
Android.showToast(testVal);
}
</script>
</head>
<body>
<div style="clear: both;height: 3px;"> </div>
<div>
<input value="submit" type="button" name="submit"
id="btnSubmit" onclick="javascript:return init();" />
</div>
</body>
</html>
