Alright so I have an app that runs all in one activity. I'm trying to add some Maps functionality so I've created a new class and extended the MapsActivity. I created a map.xml file that uses the mapview and has my apikey and all that in there.

What I need to be able to do is start up the map activity from the first one and then plot some points on the map. I tried setting a new intent using the second activity.class and then saying startActivity(intent) and I'm getting an error somewhere between those two lines.

How can I call a second activity from my first one?

Then beyond that, how can I pass in a lat/long to plot a point on the map? After doing some research it looks like you're not supposed to talk directly from one activity to another, so I'm not sure how to accomplish this.

Here's my code:

The Map Activity:



The function in the first activity that's supposed to call the map


And the map activity entry in the manifest:


I'm thinking that those intent-filters could be what's causing the issue, but I have no clue.

C'mon, someone has to know what's going on here.

did you get your api key?

Yep, it's inside my layout XML. Even without the key, I don't think I'd get an error when trying to open the activity, it would just show the all the way zoomed out map.

Here's my layout map.xml



That all looks good, right?

no you now need a api key witch you can obtain though lgoogle api

linkmaster_6 wrote:no you now need a api key witch you can obtain though lgoogle api

Yeah, and I have one. I just replaced it in the map.xml that I posted here.

Just noticed this error in the debugger...

11-06 15:41:16.735: ERROR/AndroidRuntime(994): Uncaught handler: thread WebViewCoreThread exiting due to uncaught exception
11-06 15:41:17.024: ERROR/AndroidRuntime(994): java.lang.NoClassDefFoundError: my.namespace.MyMap

So I'm guessing that there's something wrong with the MyMap Activity class above. Or possibly with the Intent constructor that calls the MyMap.class. Anyone seen this before?

11-06 15:41:17.024: ERROR/AndroidRuntime(994): java.lang.NoClassDefFoundError: my.namespace.MyMap

Is MyMap in the same namespace? (is it packages for Java? ). Is there any difference in case between the xml files and the java files/class name?

Code: Select all

package myPackage;

import com.google.android.maps.MapActivity;
import android.os.Bundle;

public class MyMap extends MapActivity

According to the above, package is 'myPackage' but the running activity is looking in 'my.namespace'. Where is my.namespace defined? I take it that myPackage should be my.namespace.

Quetzalcoatl wrote:

Code: Select all

package myPackage;

import com.google.android.maps.MapActivity;
import android.os.Bundle;

public class MyMap extends MapActivity

According to the above, package is 'myPackage' but the running activity is looking in 'my.namespace'. Where is my.namespace defined? I take it that myPackage should be my.namespace.

Sorry, I've been replacing the real namespace of the project with placeholders. The package that the "MyMap" class is in is the same as the main activity. Just imagine that they all say the my.namespace.

java.lang.NoClassDefFoundError: my.namespace.MyMap



Does still suggest that it cannot find the class for some reason.

I figured out what the problem was!

I needed to put this line:

<uses-library android:name="com.google.android.maps" />

Inside the Application tag of the AndroidManifest.xml.

After I added that it loaded right up.

Sorry to hijack the thread (kind of) I didn't think my question warranted a new thread, I have an api key from google but it says its only good for any url in the website that i supplied when I signed up, can I still just use this api key in an Android application or is there extra steps I need to take?