Run Android Java code from Web Page
Modify /assets/mypage.html to add two button to call JavascriptInterface in Android Java code.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width; user-scalable=0;" />
<title>My HTML</title>
</head>
<body>
<h1>MyHTML</h1>
<input type="button" value="Say hello" onClick="showAndroidToast('Hello Android!')" />
<script type="text/javascript">
function showAndroidToast(toast) {
AndroidFunction.showToast(toast);
}
</script>
<input type="button" value="Open Dialog" onClick="openAndroidDialog()" />
<script type="text/javascript">
function openAndroidDialog() {
AndroidFunction.openAndroidDialog();
}
</script>
</body>
</html>Main code, to add our JavascriptInterface.
package com.exercise.AndroidHTML;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.webkit.WebView;
import android.widget.Toast;
public class AndroidHTMLActivity extends Activity {
WebView myBrowser;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myBrowser = (WebView)findViewById(R.id.mybrowser);
myBrowser.addJavascriptInterface(new MyJavaScriptInterface(this), "AndroidFunction");
myBrowser.getSettings().setJavaScriptEnabled(true);
myBrowser.loadUrl("file:///android_asset/mypage.html");
}
public class MyJavaScriptInterface {
Context mContext;
MyJavaScriptInterface(Context c) {
mContext = c;
}
public void showToast(String toast){
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
public void openAndroidDialog(){
AlertDialog.Builder myDialog
= new AlertDialog.Builder(AndroidHTMLActivity.this);
myDialog.setTitle("DANGER!");
myDialog.setMessage("You can do what you want!");
myDialog.setPositiveButton("ON", null);
myDialog.show();
}
}
}
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