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I'm loading below html in my webView
https://mail-attachment.googleusercontent.com/attachment/?ui=2&ik=25c0c425c6&view=att&th=138db54ff27ad34b&attid=0.1&disp=inline&realattid=f_h5ahtmbe0&safe=1&zw&saduie=AG9B_P9YNooGjsk_jLefLptQ9q15&sadet=1343790299575&sads=-yBVsLKP_2mh7zMfYLCF7sL1u-w
Now what I want to do is to fill the textbox in the html that came from my java class variable and then automatically hit submit.
But I don't have any idea how to do this.
Any thougths will be appreciated.
360
First, your URL seems not available.
If you want to do data exchange between android app and your web app/web page you can achieve this via javascript.
Here is an example from Android official site:
Create a class like this:
public class JavaScriptInterface {
Context mContext;
/** Instantiate the interface and set the context */
JavaScriptInterface(Context c) {
mContext = c;
}
/** Show a toast from the web page */
@JavascriptInterface
public void showToast(String toast) {
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
}
In your WebView:
WebView webView = (WebView) findViewById(R.id.webview);
webView.addJavascriptInterface(new JavaScriptInterface(this), "Android");
In your web page:
<input type="button" value="Say hello" onClick="showAndroidToast('Hello Android!')" />
<script type="text/javascript">
function showAndroidToast(toast) {
Android.showToast(toast);
}
</script>
If you wanna pass something to your webpage, just calling corresponding javascript function:
String str = "xxx";
myWebView.loadUrl("javascript:xxx('"+str+"')");
Here is the Reference: http://developer.android.com/guide/webapps/webview.html
151
I would add that the load of the javascript function should be done when the html is loaded. To control that, you can use the following:
webview.getSettings().setJavaScriptEnabled(true);
webview.loadUrl("file:///android_asset/test.html");
webview.setWebViewClient(new WebViewClient(){
public void onPageFinished(WebView view, String url){
webview.loadUrl("javascript:init('" + theArgumentYouWantToPass + "')");
}
});
test.html
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
</head>
<body>
hola
adios
</body>
<script type="text/javascript">
function init(val){
// Do whatever you want with your parameter val
}
</script>
</html>
Taken from Uncaught ReferenceError: myFunction is not defined at null:1 Android exception in webview
32
Just enable DOM Storage and write var x= to string:
webview.getSettings().setJavaScriptEnabled(true);
web.getSettings().setDomStorageEnabled(true);
webview.loadUrl(urlString);
webview.setWebViewClient(new WebViewClient(){
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
String js = "javascript:var x =document.getElementById('username').value = '"+user+"';var y=document.getElementById('password').value='"+pass+"';";
if (Build.VERSION.SDK_INT >= 19) {
view.evaluateJavascript(js, new ValueCallback<String>() {
@Override
public void onReceiveValue(String s) {
}
});
}
else {
view.loadUrl(js);
}
}
Be careful to call javascript function like this, the str may include single quote or other special characters.
String str = "xxx";
myWebView.loadUrl("javascript:xxx('"+str+"')");
I suggest to encode the str in base64, and decode it on javascript side.
Android
String str = "xxx";
//encode in base64
String base64Str = Base64.encodeToString(str.getBytes(), Base64.NO_WRAP);
myWebView.loadUrl("javascript:xxx('"+ base64Str +"')");
Javascript
function xxx(val) {
//decode from base64
var str = atob(data)
}
Pass the paramter directly in the url
webView.loadUrl("file:///android_asset/animation.html?message=testing");
Get the paramter in html file
var url_string = window.location.href
var url = new URL(url_string);
var message= url.searchParams.get("message");
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