Whats the issue with the android emulator to display map in Web View
I am getting a blank white screen in my emulator and the map is not getting displayed.
Here is what is suppose to be displayed in a browser: [http://code.google.com/apis/maps/documentation/javascript/examples/layer-georss.html]
Here's the code for manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.apps.mylocations"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MyLocations"
android开发者_运维技巧:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
</manifest>
Here is my layout XML File which has a webview:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<WebView android:id="@+id/web_engine"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
Here is Java Code:
package com.apps.mylocations;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
public class MyLocations extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
WebView engine = (WebView) findViewById(R.id.web_engine);
engine.getSettings().setJavaScriptEnabled(true);
String data = "<html>" +
"<head>" +
"<meta name=\"viewport\" content=\"initial-scale=1.0, user-scalable=no\" />" +
"<meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\"/>" +
"<title>Google Maps JavaScript API v3 Example: KmlLayer GeoRSS</title>" +
"<link href=\"http://code.google.com/apis/maps/documentation/javascript/examples/default.css\" rel=\"stylesheet\" type=\"text/css\" />" +
"<script type=\"text/javascript\" src=\"http://maps.google.com/maps/api/js?sensor=false\"></script>" +
"<script type=\"text/javascript\">" +
"function initialize() {" +
"var myLatlng = new google.maps.LatLng(49.496675,-102.65625);" +
"var myOptions = {" +
"zoom: 4," +
"center: myLatlng," +
"mapTypeId: google.maps.MapTypeId.ROADMAP" +
"}" +
"var map = new google.maps.Map(document.getElementById(\"map_canvas\"), myOptions);" +
"var georssLayer = new google.maps.KmlLayer('http://api.flickr.com/services/feeds/geo/?g=322338@N20&lang=en-us&format=feed-georss');" +
"georssLayer.setMap(map);" +
"}" +
"</script>" +
"</head>" +
"<body onload=\"initialize()\">" +
"<div id=\"map_canvas\"></div>" +
"</body>" +
"</html>";
engine.loadData(data, "text/html", "UTF-8");
}
}
You have followed the hints on existing questions?
google map not showing after publishing android application?
Does anyone know why my maps only show grid
- internet permission given in manifest?
- maps key correct?
Are you in a network that need proxy to access Internet? If yes you need to set proxy for emulator.
http://developer.android.com/guide/developing/tools/emulator.html#proxy
Your code:
engine.loadData(...)
does not allow for loading of network resources. Therefore, since the HTML snippet attempts to load a lot of resources from the network, it won't work at all. It is limited in what it can display. Check the docs: http://developer.android.com/reference/android/webkit/WebView.html
Maybe the loadDataWithBaseURL will work better? I don't know for sure. I tried loading your code, and it uses a lot of remote javascript, which may be a problem when loaded from a static/local HTML string.
EDIT 12.05.2010:
If you have access to a server somewhere (easy), you should just publish the HTML and use the loadUrl method on the webview. The exact instructions come from Google themselves, with the Maps API documentation, here:
http://code.google.com/apis/maps/articles/android_v3.html http://gmaps-samples.googlecode.com/svn/trunk/articles-android-webmap/
Mark
加载中,请稍侯......
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