android - Passing data from java class to Web View html

Question

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.

Answer 1

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