Insert a java string into phonegap javascript

Question

I am trying to insert a java string into phonegap javascript.

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    String myName = "Xxxxx";

    super.loadUrl("file:///android_asset/www/login.html");
}

I just want to insert myName string into login.html so that I can use the string from javascript. Any idea plz?

is there any simpler way except plugin, like localstorage or anything else?
If it is must to make a plugin, then what is the way to fetch this string from here into that plugin?

I am new in both phonegap and android. Plz help.

Community · Accepted Answer · 2017-05-23 10:32:04Z

1

Try to pass sting via querystring, like

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    String myName = "Xxxxx";

    super.loadUrl("file:///android_asset/www/login.html?name=" + myName );
}

take a look here to use querystring on javascript

edited May 23, 2017 at 10:32

CommunityBot

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answered Mar 27, 2013 at 7:13

hkutluay

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1 Comment

Mehdi Over a year ago

Hi hkutluay, thanks for the suggestion. It works for me. Actually....just what I want... Thanks again.

Joe Lewis · Accepted Answer · 2013-03-27 07:51:30Z

1

In your MainActivity :

public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  JavaScriptInterfaceClass myInterface = new JavaScriptInterfaceClass(this, appView);
  appView.addJavascriptInterface(myInterface, "Android");

  super.loadUrl("file:///android_asset/www/login.html");
}

Create a new class in your project for instantiating myInterface(works only for phonegap):

public class JavascriptInterfaceClass {
    private WebView mAppView;
    private DroidGap mGap;

public JavascriptInterfaceClass(DroidGap gap, WebView view) {
    mAppView = view;
    mGap = gap;
}

public String getMyString() {
  String myName = 'xxxxx';
  return myName;

}

In your WebView:

<script type="text/javascript">
  function getString() {
      return Android.getString();
  }
</script>

answered Mar 27, 2013 at 7:51

Joe Lewis

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3 Comments

Mehdi Over a year ago

Thanks a lot for ur help. (1) But it is showing error: Unable to start activity ComponentInfo{com.minfb/com.minfb.PhoneGapActivity}: java.lang.NullPointerException. (2) Another thing...return Android.getString or return Android.getMyString? any direction?

Joe Lewis Over a year ago

I hope the first answer did the trick in much simpler way. I haven't tried it before and thats why I answered with this one. Have no idea why it raises nullPointerException. I might use some more log information. and yes it's Android.getMyString() !

Mehdi Over a year ago

Yes, first one is very simple to implement. I have learned about java constructors by your answer. Thanks a lot.

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