public class MainActivity extends AppCompatActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		WebView webView = findViewById(R.id.webView);
		
		WebSettings webSettings = webView.getSettings();
		webSettings.setJavaScriptEnabled(true);
		webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
		webView.setWebChromeClient(new WebChromeClient() {
			@Override
			public boolean onConsoleMessage(ConsoleMessage consoleMessage) {
				String message = consoleMessage.message();

				if (!message.equals("cancelled")) {
					try {
						JSONObject jSONObject = new JSONObject(consoleMessage.message());
						String _pay_id = jSONObject.getString("ID");
						String _banking = jSONObject.getString("Gateway");
						String _method = jSONObject.getString("Method");
						String _sender = jSONObject.getString("Sender");
						String _amount = jSONObject.getString("Amount");
						String _trx = jSONObject.getString("Trx");
						String _time = jSONObject.getString("Time");

						if (jSONObject.getString("message").equals("পেমেন্ট সফল হয়েছে।")) {
							Toast.makeText(MainActivity.this,"Payment Successful",Toast.LENGTH_LONG).show();
						}
					} catch (JSONException e) {
					}
				} else {
				}
				return super.onConsoleMessage(consoleMessage);
			}
		});

		webView.setWebViewClient(new WebViewClient() {
			@Override
			public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
				String url = request.getUrl().toString();
				if (url.startsWith("tg:resolve?")) {
					Intent telegramIntent = new Intent(Intent.ACTION_VIEW);
					telegramIntent.setData(Uri.parse("tg:resolve?domain=bohudur"));
					startActivity(telegramIntent);
					return true;
				}
				view.loadUrl(url);
				return false;
			}
		});

		try {
			webView.postUrl("https://pay.example.com/", "amount=10".getBytes("UTF-8"));
		} catch (UnsupportedEncodingException e) {
		}
	}
}