在Android 2.0+上使用navigator.geolocation.getCurrentPosition在WebView中（PhoneGap相关） [英] Using navigator.geolocation.getCurrentPosition in WebView on Android 2.0+ (PhoneGap related)

问题描述

我一直在使用PhoneGap，这是伟大的，但我遇到了一个问题，获取位置在Verizon Droid w / 2.0.1（工作原理预期在G1 w / 1.6）。

I've been working with PhoneGap and it's been great, but I've run into a problem with getting location on a Verizon Droid w/ 2.0.1 (works as expected on a G1 w/ 1.6).

GeoLocation API支持已在2.0（Eclair）中添加到Android，它在Verizon Droid（2.0.1）上的默认浏览器中可用。也就是说，如果我访问一个网站调用navigator.geolocation.getCurrentPosition（success_callback，error_callback），设备提示当前域想知道你的位置在一个对话框中有共享位置或拒绝选项。如果我选择共享位置，success_callback最终会使用位置数据调用。

GeoLocation API Support was added to Android in 2.0 (Eclair) and it works in the default browser on a Verizon Droid (on 2.0.1). That is, if I visit a website that calls navigator.geolocation.getCurrentPosition(success_callback, error_callback), the device prompts that the current domain "wants to know your location" in a dialog with options to "Share location" or "decline". If I select "Share location", success_callback eventually gets called with location data.

如果我在WebView中访问同一个网站，调用navigator.geolocation.getCurrentPosition不会生成javascript错误，但共享您的位置对话框不显示，也不会调用回调。在logcat中，我看到了一个似乎是相关的错误：02-15 10：37：00.413：ERROR / geolocationService（16871）：捕获安全异常注册来自系统的位置更新，这应该只发生在DumpRenderTree。

If I visit the same website in a WebView, the call to navigator.geolocation.getCurrentPosition does not generate a javascript error, but the "share your location" dialog is not displayed and neither callback ever gets called. In logcat, I see what seems to be a related error: "02-15 10:37:00.413: ERROR/geolocationService(16871): Caught security exception registering for location updates from system. This should only happen in DumpRenderTree."

在我看来，WebView没有注册位置更新，因为它没有所需的权限，这又是不提示用户的结果权限。虽然在Android 2.0中有几个方法和对象被添加到与GeoPermissions相关的Webkit软件包中，但我无法使用任何方法和对象来使WebView显示GeoPermission对话框。

It seems to me that the WebView is failing to register for location updates because it does not have the required permission, which in turn is a result of not prompting the user for the permission. Although there were several methods and objects added to the Webkit package in Android 2.0 related to GeoPermissions, I haven't been able to use any of them to cause WebView to display the GeoPermission dialog.

以下是基于Android开发人员指南中的Hello，WebView示例，但它添加了与GeoPermissions相关的2.0中添加的一些调用和对象。 *已更新适当的网址（获得作者 - 感谢Oliver ！）。

The following is based on the Hello, WebView example from the Android Developer's Guide but it adds some of the calls and objects that were added in 2.0 related to GeoPermissions. *Updated with an appropriate url (with permission from the author - thanks Oliver!).

有没有人能够得到这个工作？任何反馈将是巨大的，谢谢！

Has anyone been able to get this working? Any feedback would be great, thanks!

package com.example.android.helloactivity;

import android.app.Activity;
import android.os.Bundle; 
import android.webkit.GeolocationPermissions;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.GeolocationPermissions.Callback;

public class HelloActivity extends Activity implements GeolocationPermissions.Callback{

WebView webview;
String geoWebsiteURL = "http://maxheapsize.com/static/html5geolocationdemo.html";
public HelloActivity() {
}

/**
 * Called with the activity is first created.
 */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.hello_activity);

    webview = (WebView) findViewById(R.id.webview);
    webview.getSettings().setJavaScriptEnabled(true);
    webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    webview.getSettings().setGeolocationEnabled(true);  //seems like if i set this, the webview should prompt when I call navigator.geolocation.getCurrentPosition
    GeolocationPermissions geoPerm = new GeolocationPermissions(); //added in API Level 5 but no methods exposed until API level 7
    GeoClient geo = new GeoClient();
    webview.setWebChromeClient(geo);        
    String origin = ""; //how to get origin in correct format?
    geo.onGeolocationPermissionsShowPrompt(origin, this);  //obviously not how this is meant to be used but expected usage not documented
    webview.loadUrl(geoWebsiteURL);        

}

public void invoke(String origin, boolean allow, boolean remember) {

}

final class GeoClient extends WebChromeClient {

@Override
public void onGeolocationPermissionsShowPrompt(String origin,
Callback callback) {
// TODO Auto-generated method stub
super.onGeolocationPermissionsShowPrompt(origin, callback);
callback.invoke(origin, true, false);
}

}

}

推荐答案

我刚刚在安卓2.1的Nexus One上试过你的代码，它工作正常。请记住，您需要向清单添加必要的权限：

I just tried your code on a Nexus One with Android 2.1, and it works fine. Remember that you'll need to add the necessary permissions to your manifest:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

这篇关于在Android 2.0+上使用navigator.geolocation.getCurrentPosition在WebView中（PhoneGap相关）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！