CODEWITHSUNDEEP
javaandroidgoogle-mapsclassnotfoundexception
Sam Bevins
Sam Bevins

Reputation: 1949

com.google.android.maps.MapView ClassNotFoundException

I am trying to do a google maps activity but I get a LogCat error and my app crashes. I used the coding provided by android when I registered my API key so I don't know why it doesn't work. I need help solving this.

LogCat

08-10 11:04:38.854: W/dalvikvm(702): Unable to resolve superclass of Lcom/maps/google/Main; (402)
08-10 11:04:38.854: W/dalvikvm(702): Link of class 'Lcom/maps/google/Main;' failed
08-10 11:04:38.854: D/AndroidRuntime(702): Shutting down VM
08-10 11:04:38.854: W/dalvikvm(702): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
08-10 11:04:38.874: E/AndroidRuntime(702): FATAL EXCEPTION: main
08-10 11:04:38.874: E/AndroidRuntime(702): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.maps.google/com.maps.google.Main}: java.lang.ClassNotFoundException: com.maps.google.Main
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.app.ActivityThread.access$600(ActivityThread.java:130)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.os.Handler.dispatchMessage(Handler.java:99)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.os.Looper.loop(Looper.java:137)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.app.ActivityThread.main(ActivityThread.java:4745)
08-10 11:04:38.874: E/AndroidRuntime(702):  at java.lang.reflect.Method.invokeNative(Native Method)
08-10 11:04:38.874: E/AndroidRuntime(702):  at java.lang.reflect.Method.invoke(Method.java:511)
08-10 11:04:38.874: E/AndroidRuntime(702):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
08-10 11:04:38.874: E/AndroidRuntime(702):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-10 11:04:38.874: E/AndroidRuntime(702):  at dalvik.system.NativeStart.main(Native Method)
08-10 11:04:38.874: E/AndroidRuntime(702): Caused by: java.lang.ClassNotFoundException: com.maps.google.Main
08-10 11:04:38.874: E/AndroidRuntime(702):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
08-10 11:04:38.874: E/AndroidRuntime(702):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
08-10 11:04:38.874: E/AndroidRuntime(702):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
08-10 11:04:38.874: E/AndroidRuntime(702):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974)
08-10 11:04:38.874: E/AndroidRuntime(702):  ... 11 more

XML File

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <com.google.android.maps.MapView
        android:id="@+id/MView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:apiKey="02ooeHTBsCB6ez4yyEGFEyiuNCz5hTHubgxBMfg" />

</RelativeLayout>

Java file

package com.maps.google;

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

public class Main extends MapActivity {

    MapView map;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        map = (MapView)findViewById(R.id.MView);
    }

    @Override
    protected boolean isRouteDisplayed() {
        // TODO Auto-generated method stub
        return false;
    }

}

Upvotes: 3

Views: 6742

Answers (3)

Pramod J George
Pramod J George

Reputation: 1723

Make sure you have included the following line in your application manifest:

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

and make sure it's in the correct place. My problem (had similar error messages) was that I had put this in there but like the uses-permission stuff it was just under the root element manifest, when in fact the uses-library element is suppose to be placed under the application element. In case I wasn't clear enough see the part: Configuring the application manifest from Sameers link.

Upvotes: 5

Mohsin Naeem
Mohsin Naeem

Reputation: 12642

add <uses-library like this in your manifest file.

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.example.package.name">
  ...
  <application android:name="MyApplication" >
    <uses-library android:name="com.google.android.maps" />
    ...
  </application>
  ...
</manifest>

Upvotes: 11

prolink007
prolink007

Reputation: 34544

Have you included the google map classes in your project?

You will need to add the maps jar file to your project.

The jar can be found in your {ANDROID-SDK_HOME}\add-ons\addon_google_apis_google_inc_*\libs directory.

Here are two other questions that would possibly help you with your situation.

  1. i-want-to-get-library-for-com-google-android-maps-to-add-my-project
  2. google-maps-android-api-gives-a-noclassdeffounderror

Upvotes: 0

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