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/ 8 Years ago, fri, september 23, 2016, 12:00:00
Im just trying to communicate my java app with the content on the webview .
In detail , may be just showing a toast on button click ?
After searching on google and doing some research , ended up with the following code .
P.S : - Im using Android Studio , is there any external library i need to compile inorder to get things done ? or something else ?
Following is my WebviewActivity code:-
public class WebviewActivity extends AppCompatActivity {
private static final String TAG = Main;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_webview);
//WebView Object
WebView browser;
browser=(WebView)findViewById(R.id.webView);
//Enable Javascript
browser.getSettings().setJavaScriptEnabled(true);
//Inject WebAppInterface methods into Web page by having Interface 'Android'
browser.addJavascriptInterface(new WebAppInterface(this), Android);
browser.loadUrl(http://www.somewebsite.com/app/form.html);
}
//Class to be injected in Web page
public class WebAppInterface {
Context mContext;
/** Instantiate the interface and set the context */
WebAppInterface(Context c) {
mContext = c;
}
/**
* Show Toast Message
* @param toast
*/
public void showToast(String toast) {
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
/**
* Show Dialog
* @param dialogMsg
*/
public void showDialog(String dialogMsg){
AlertDialog alertDialog = new AlertDialog.Builder(mContext).create();
// Setting Dialog Title
alertDialog.setTitle(JS triggered Dialog);
// Setting Dialog Message
alertDialog.setMessage(dialogMsg);
// Setting alert dialog icon
//alertDialog.setIcon((status) ? R.drawable.success : R.drawable.fail);
// Setting OK Button
alertDialog.setButton(OK, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(mContext, Dialog dismissed!, Toast.LENGTH_SHORT).show();
}
});
// Showing Alert Message
alertDialog.show();
}
/**
* Intent - Move to next screen
*/
public void moveToNextScreen(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle(Alert);
// Setting Dialog Message
alertDialog.setMessage(Are you sure you want to leave to next screen?);
// Setting Positive Yes Button
alertDialog.setPositiveButton(YES,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//Move to Next screen
}
});
// Setting Negative NO Button
alertDialog.setNegativeButton(NO,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Cancel Dialog
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
}
}
form.html:-
<html>
<head>
<style>
body{
background-color: #FA5858;
color:#fff;
}
input{
background-color: #F7D358;
width: 300px;
padding:10px;
color: #000;
}
div#content{
padding:20px;
background-color: #F7D358;
color: #000;
}
</style>
<script type=text/javascript>
function showAndroidToast(toastmsg) {
Android.showToast(toastmsg);
}
function showAndroidDialog(dialogmsg) {
Android.showDialog(dialogmsg);
}
function moveToScreenTwo() {
Android.moveToNextScreen();
}
</script>
</head>
<body>
<center>
<h3>Binding JavaScript code to Android code</h3>
<div id=content>
//some content here
</div>
<div>
Here are few examples:
</div>
<div>
<input type=button value=Make Toast onClick=showAndroidToast('Toast made by Javascript') /><br/>
<input type=button value=Trigger Dialog onClick=showAndroidDialog('This dialog is triggered by Javascript ') /><br/>
<input type=button value=Take me to Next Screen onClick=moveToScreenTwo() />
</div>
</center>
</body>
</html>
I have this above code , but it is not working in android-studio , tried all posiblities so finally posted my question here .
My study for this :-
https://developer.android.com/guide/webapps/webview.html
https://developer.android.com/reference/android/webkit/WebView.html
http://stackoverflow.com/questions/4325639/android-calling-javascript-functions-in-webview
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