I am very new to Android and developing my first app. My Version is 6.0 and
API veresion is 21.
My app is having a textbox and a button in its home page. I am putting my
url and hit submit button so that a webview will loads this url.
In my url I included some javascript functions, they are defined to
retuning some values.
I am trying to get that value and assign the value to other textbox.
I tried in two ways but none of them worked for me.
First
I created a new class as follows,
public class JsInterface {
private String val;
@JavascriptInterface
void receiveString(String value) {
Log.d("This is what from JS-", value);
val = value;
}
String Val() {
return val;
}
}
My JS function
function goAndroid(Go Value to Script){
var goString = "Hello " + Go Value to Script;
window.MyAndroidApp.receiveString(goString);
}
In mainActivity.java
WebView.addJavascriptInterface(new JsInterface(), "MyAndroidApp");
WebView.loadUrl("javascript:goAndroid('Go Value to Script')")
//Below value is null..
System.out.println(new JsInterface().Val());
Here the system out comes nothing...
Second
As I am using API version 21, I followed the another way,
webView.evaluateJavascript("(function() { return goAndroid('My Value');
})();", new ValueCallback() {
@Override
public void onReceiveValue(String s) {
Log.d("LogName--------------", s);
}
});
Here I am getting a small popup which says " unfortunately, app has
stopped". In LogCat I am getting the following error
05-10 17:36:13.922: E/AndroidRuntime(822): FATAL EXCEPTION: main 05-10
17:36:13.922: E/AndroidRuntime(822): java.lang.NoSuchMethodError:
android.webkit.WebView.evaluateJavascript 05-10 17:36:13.922:
E/AndroidRuntime(822): at
com.example.asdf.MainActivity$5.onClick(MainActivity.java:209)
Thanks in advance.
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