js如何调用安卓api接口

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);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.addJavascriptInterface(new WebAppInterface(this), "Android");
        webView.loadUrl("file:///android_asset/index.html");
    }

    public class WebAppInterface {
        Context mContext;

        WebAppInterface(Context c) {
            mContext = c;
        }

        @JavascriptInterface
        public void showToast(String toast) {
            Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
        }
    }
}

function showAndroidToast(toast) {
    Android.showToast(toast);
}

npm install -g cordova

cordova create hello com.example.hello HelloWorld

cd hello
cordova platform add android

document.addEventListener('deviceready', function() {
    navigator.notification.alert(
        'You are the winner!',  // message
        null,                 // callback
        'Game Over',          // title
        'Done'                // buttonName
    );
}, false);