@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        // 启动 AndServer
        startService(new Intent(this, NsServerService.class));
        
    }

@RestController
public class NsyyController {

    @GetMapping("/test")
    public String ping() {
        return "SERVER OK";
    }

    @GetMapping("/location")
    public String location() {
        try {
            return LocationServices.getInstance().location();
        } catch (Exception e) {
            return "Failed to get location: Please enable location service first";
        }
    }

    @GetMapping("/notification")
    public void notification() {
        try {
            NotificationServices.getInstance().notification();
        } catch (Exception e) {

        }
    }
}

Location location = locationManager.getLastKnownLocation(bestProvider);

    @JavascriptInterface
    public void scanCode(){
        // 多种模式可选： https://developer.huawei.com/consumer/cn/doc/development/HMSCore-Guides/android-overview-0000001050282308
        //loadScanKitBtnClick();
        newViewBtnClick();
        //multiProcessorSynBtnClick();
        //multiProcessorAsynBtnClick();
    }

public class MainActivity extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // ...
        initView();
        // ...
    }

    private void initView() {

        // ...
        webView = findViewById(R.id.webView);

        // Enable Javascript
        WebSettings webSettings = webView.getSettings();
        webSettings.setDomStorageEnabled(true);
        webSettings.setCacheMode(WebSettings.LOAD_DEFAULT);
        // 设置允许JS弹窗
        webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
        // 设置 WebView 允许执行 JavaScript 脚本
        webSettings.setJavaScriptEnabled(true);

        // Add the JavaScriptInterface to the WebView
        webView.addJavascriptInterface(this, "AndroidInterface");

        // 重写 javascript 的 alert 和 confirm 函数,弹窗界面更美观。
        webView.setWebChromeClient(new WebChromeClient() {
            @Override
            public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {
                AlertDialog.Builder b = new AlertDialog.Builder(MainActivity.this);
                b.setTitle("Alert");
                b.setMessage(message);
                b.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        result.confirm();
                    }
                });
                b.setCancelable(false);
                b.create().show();
                return true;
            }

            //设置响应js 的Confirm()函数
            @Override
            public boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {
                AlertDialog.Builder b = new AlertDialog.Builder(MainActivity.this);
                b.setTitle("Confirm");
                b.setMessage(message);
                b.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        result.confirm();
                    }
                });
                b.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        result.cancel();
                    }
                });
                b.create().show();
                return true;
            }
        });

        webView.loadUrl(LOAD_RUL);
    }

}

try {
    String js = "javascript:receiveScanResult('" + retValue + "')";
    System.out.println("开始执行 JS 方法：" + js);

    webView.evaluateJavascript(js, new ValueCallback<String>() {
        @Override
        public void onReceiveValue(String s) {
            System.out.println("成功接收到扫码返回值：" + s);
        }
    });
} catch (Exception e) {
    System.out.println("未成功调用 JS 方法 handleScanResult");
    e.printStackTrace();
    // Handle the exception
}

// NotificationUtil.createNotificationForHigh

// todo 组装想要跳转的页面信息 PendingIntent.FLAG_IMMUTABLE 其他的 PendingIntent 可能导致 extra 丢失
// todo page_type 1=消息页面  page_no 具体页面
        Intent intent = new Intent(context, NotificationClickReceiver.class);
        intent.putExtra("target_page","http://192.168.124.12:6060?aaa=12");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_IMMUTABLE);

// 监听通知点击事件
public class NotificationClickReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String targetPage = intent.getStringExtra("target_page");
        Log.i("TAG", "============================ " +
                "userClick:我被点击啦！！！ targetPage = " + targetPage);

        // 发送广播到 MainActivity
        Intent broadcastIntent = new Intent();
        broadcastIntent.setAction("LOAD_TARGET_PAGE");
        broadcastIntent.putExtra("target_page", targetPage);
        context.sendBroadcast(broadcastIntent);
    }

}
// 将要跳转的页面信息，通过 target_page 传递给 MainActivity

// NotificationClickReceiver 需要在 AndroidManifest 中注册

<receiver
            android:name=".notification.NotificationClickReceiver">
</receiver>

// 监听广播事件
    private final BroadcastReceiver noticeReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String targetPage = intent.getStringExtra("target_page");
            Log.i("TAG", "============================ 通知触发webview  " + targetPage);

            // 在 WebView 中加载目标页面
            webView.loadUrl(targetPage);
        }
    };

// MainActivity 如果时在后台，将应用带到前台

@Override
protected void onResume() {
        super.onResume();
        // ...

        if (isAppInBackground()) {
        bringWebViewActivityToFront();
        }

        // ...
        }

private boolean isAppInBackground() {
        ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> tasks = am.getRunningTasks(1);
        if (!tasks.isEmpty()) {
        ComponentName topActivity = tasks.get(0).topActivity;
        return !topActivity.getPackageName().equals(getPackageName());
        }
        return false;
        }

private void bringWebViewActivityToFront() {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
        }