I am writing an Android "web" app (I will not upload the APP to the web, but set the HTML+JS inside the application resources). That means, the GUI will be HTML5, and I will use another "native" thread to read from the microphone and hopefully send the "parsed text" to the HTML5/JS code.
Is this possible? In the Android code, I see how can I call native code from JS (and I want the opposite).
Yes, Android rocks at this actually.
I'm posting example code from a random example app that I made but this should get you going.
Lets start by supposing you have to global variable to your webview controlling class:
String name = "John";
String lastName = "Doe";
In the Android class controlling the webview (during onCreate() or when you setup your webview):
webView.addJavascriptInterface(new JavaScriptInterface(), "android")
Inner class to your webview controlling class:
/**
* Sets up the interface for getting access to Latitude and Longitude data
* from device
**/
private class JavaScriptInterface {
public String getName() {
return name;
}
public String getLastName() {
return lastName;
}
public void onJavascriptButtonPushed(String text) {
Toast.makeText(WebViewControllingClass.this, "The text of the pressed button is: "+text,Toast.LENGTH_SHORT).show();
}
}
Thats it for the Android side, now to use it through Javascript:
To get the name and lastname through JavaScript:
if (window.android){
name = window.android.getName();
lastName = window.android.getLastName();
}
If you want to raise the toast, set a javascript whose function would be:
if (window.android){
window.android.onJavascriptButtonPushed("Hello");
}
Edit:
I havent tried this, but a search yielded this, try it out, it should work.
If you want to use it in the other direction:
JS:
function testEcho(message){
window.JSInterface.doEchoTest(message);
}
Android:
myWebView.loadUrl("javascript:testEcho('Hello World!')");
