使用GeolocationPermissions的Android WebView
作者：互联网
我在这里查看了有关此问题的各种问题,例如：
> Using navigator.geolocation.getCurrentPosition in WebView on Android 2.0+ (PhoneGap related)
> android webview geolocation
> Android: Using html5 to determine geolocation in webview with javascript api
但是我还是有点困惑,我知道我应该从抽象类WebChromeClient创建自己的类.哪个获取位置,但是此对象如何从那里确切地向webView发送地理位置信息/它们如何通信？
这是我的代码：(这至少在正确的轨道上吗？)
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.webkit.GeolocationPermissions.Callback;
import android.webkit.JsResult;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.GeolocationPermissions;
public class site extends Activity {
WebView engine;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
WebViewClient yourWebClient = new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.contains("tel:") == true) {
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
startActivity(intent);
}
else if(url.contains("visitchicagosouthland") == true) {
view.loadUrl(url);
}
//Here is where I create my object, I did this because I only need the location when this
//page is loaded. Could this be part of the problem?
else if(url.contains("directions.cfm") == true) {
GeoClient geo = new GeoClient();
engine.setWebChromeClient(geo);
String origin = ""; //how to get origin in correct format?
Callback call = null;
geo.onGeolocationPermissionsShowPrompt(origin, call );
}
else {
/*Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("url"));
startActivity(browserIntent);*/
}
return true;
}
};
engine = (WebView) findViewById(R.id.web_engine);
engine.getSettings().setJavaScriptEnabled(true);
engine.getSettings().setBuiltInZoomControls(true);
engine.getSettings().setSupportZoom(true);
engine.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
engine.getSettings().setGeolocationEnabled(true);
engine.setWebViewClient(yourWebClient);
engine.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
engine.loadUrl("http://www.visitchicagosouthland.com/jrudnydev/phone/");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.home, menu);
return true;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && engine.canGoBack()) {
engine.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
if(item.getItemId() == R.id.home) {
engine.loadUrl("http://www.visitchicagosouthland.com/mobile/");
return true;
}
else if(item.getItemId() == R.id.refresh) {
engine.reload();
return true;
}
else if(item.getItemId() == R.id.stop) {
engine.stopLoading();
return true;
}
else {
return super.onOptionsItemSelected(item);
}
}
}
final class GeoClient extends WebChromeClient {
@Override
public void onProgressChanged(WebView view, int progress) {
// Activities and WebViews measure progress with different scales.
// The progress meter will automatically disappear when we reach 100%
//Activity.setProgress(progress * 100);
}
@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
//Log.d(LOG_TAG, message);
// This shows the dialog box. This can be commented out for dev
AlertDialog.Builder alertBldr = new AlertDialog.Builder(null);
alertBldr.setMessage(message);
alertBldr.setTitle("Alert");
alertBldr.show();
result.confirm();
return true;
}
@Override
public void onGeolocationPermissionsShowPrompt(String origin, Callback callback) {
// TODO Auto-generated method stub
super.onGeolocationPermissionsShowPrompt(origin, callback);
callback.invoke(origin, true, false);
}
}
我的android-manifest.xml：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.visitchicagosouthland"
android:versionCode="1"
android:versionName="1.0">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_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_COARSE_LOCATION" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".site"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="4" />
</manifest>
解决方法:
如果html是您自己的,这很简单.有几种方法,我将给您2种.
使用GET的简单方法
想法是在URL中发送位置(您可能需要一些编码,但只要是数字且没有空格,就可以了)
您的ShouldOverridUrlLoading的一些编辑
public boolean shouldOverrideUrlLoading(WebView view, String url){
if (url.needs_geo) //meaning if this is the url that needs the geo location
url += "?geo=" + your_location;
view.loadUrl(url);
return true;
}
在您的JavaScript中：
function getParam(name)
{
name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
var regexS = "[\\?&]"+name+"=([^&#]*)";
var regex = new RegExp( regexS );
var results = regex.exec( window.location.href );
if( results == null )
return "";
else
return results[1];
}
然后
var geo_location = getParam('geo');
使用WebView.addJavascriptInterface
(我从未尝试过将值从Java传递给JavaScript,但也可能会起作用).这个想法是为您的JavaScript提供Java类,可以访问该Java类以获得要传递给JavaScript的参数.
在您的Activity类中：
public String location; //as an example
public class SherifJS {
public String getLocation(){
return location;
}
}
//bla bla
SherifJS loc = new SherifJS();
yourWebView.addJavascriptInterface(loc, "locationProvider");
在您的JavaScript中：
<script type="text/javascript">
<!--
function sherifJS() {
document.getElementById("locationHolder").innerHTML =
window.locationProvider.getLocation();
}
-->
</script>
标签：geolocation,webview,android 来源： https://codeday.me/bug/20191208/2088892.html