Android WebChromeClient WebView onGeolocationPermissionsShowPrompt 从未触发

Question

我有一个带有 WatchPosition 调用的网页，它在常规浏览器中运行良好。但是，当使用 WebChromeClient 从 WebView 加载网页并且永远不会调用 onGeolocationPermissionsShowPrompt 时，请求 GPS 权限的对话框永远不会显示。

public class GeoWebChromeClient extends WebChromeClient {
     public void onGeolocationPermissionsShowPrompt(String origin, android.webkit.GeolocationPermissions.Callback callback) {
         Log.d("geolocation permission", "permission >>>"+origin);
         callback.invoke(origin, true, false);
     }
}

 public class GeoWebViewClient extends WebViewClient {

    @Override
    public void onReceivedSslError (WebView view, SslErrorHandler handler, SslError error) {
        handler.proceed();
    }

    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        // When user clicks a hyperlink, load in the existing WebView
        view.loadUrl(url);
        return true;
    }
}

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

    WebView Browser = (WebView) findViewById(R.id.Browser);

    WebSettings webSettings = Browser.getSettings();

    webSettings.setJavaScriptEnabled(true);
    webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
    webSettings.setAppCacheEnabled(true);
    webSettings.setDomStorageEnabled(true);
    webSettings.setGeolocationEnabled(true);

    Browser.setWebViewClient(new GeoWebViewClient());
    Browser.setWebChromeClient(new GeoWebChromeClient());

    Browser.loadUrl("http://192.168.1.102/");


}

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

Answer 1

onGeolocationShowPrompt 本身并不实际显示提示，它只是一种在页面请求您的地理位置时调用的方法。您需要为用户创建自己的提示，如下所示(位于 onGeolocationShowPrompt 方法内):

final boolean remember = true;
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Locations");
builder.setMessage(origin + " Would like to use your Current Location").setCancelable(true).setPositiveButton("Allow",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog,
                                        int id) {
                                    // origin, allow, remember
                                    callback.invoke(origin, true, remember);
                                }
                            })
                    .setNegativeButton("Don't Allow",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog,
                                        int id) {
                                    // origin, allow, remember
                                    callback.invoke(origin, false, remember);
                                }
                            });
AlertDialog alert = builder.create();
alert.show();