BackPress click event with Confirmation dialogbox

Put this method in your activity.


@Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // Handle the back button
        if (keyCode == KeyEvent.KEYCODE_BACK) {
     
        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View popuplayoutReject = inflater.inflate(R.layout.popup_reject_request, (ViewGroup) findViewById(R.id.popup_element));
        final PopupWindow popUpReject = new PopupWindow(popuplayoutReject, WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT, false);
        ImageButton btnPopupReject_Ok, btnPopUpReject_Cancel;
        TextView txtRequestRejectMessage = (TextView) popuplayoutReject.findViewById(R.id.errorMessage);
        txtRequestRejectMessage.setText(getResources().getString(R.string.AddEntryNotSaved));
        btnPopupReject_Ok = (ImageButton) popuplayoutReject.findViewById(R.id.btnPopup_Yes);
        btnPopupReject_Ok.setImageResource(R.drawable.yes_button);
        
        btnPopupReject_Ok.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
               finish();
            }
        });

        btnPopUpReject_Cancel = (ImageButton) popuplayoutReject.findViewById(R.id.btnPopUp_No);
        btnPopUpReject_Cancel.setImageResource(R.drawable.no_button);
        btnPopUpReject_Cancel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                popUpReject.dismiss();
            }
        });
        popUpReject.showAtLocation(popuplayoutReject, Gravity.CENTER, 0, 0);
        return true;
        }
        return super.onKeyDown(keyCode, event);
    }

Detect OnClick of Webpage in WebView android

public class MainActivity extends Activity {
private WebView webview;

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        webview = (WebView) findViewById(R.id.webView1); // Declare webview in .xml file
        webview.setWebViewClient(new HelloWebViewClient());
        webview.getSettings().setJavaScriptEnabled(true);
        webview.loadUrl("http://www.YOURWEBLINK.com/mpages//advertise/");
}
@Override
   public boolean onKeyDown(int keyCode, KeyEvent event) {
       if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
           webview.goBack();
           return true;
       }
       return super.onKeyDown(keyCode, event);
   }
   private class HelloWebViewClient extends WebViewClient {
       @Override
       public boolean shouldOverrideUrlLoading(WebView view, String url) {
           if(url.startsWith("mailto:")){
               MailTo mt = MailTo.parse(url);
               Intent intent = new Intent (Intent.ACTION_VIEW , Uri.parse("mailto:" + "contactus@YourDomain.com"));// MAIL SEND TO
               intent.putExtra(Intent.EXTRA_SUBJECT, "Subject"); // SUBJECT
               intent.putExtra(Intent.EXTRA_TEXT, "Please refer www.macmaker.blogspot.com for more details...Thanks RONAK PANDYA ");// Mail Detail
               startActivity(intent);
               view.reload();
               return true;
           }
 
               else{
                   view.loadUrl(url);
               }
               return true;
           }
       };
     //  mWebView.setWebViewClient(mWebClient);        }
   }