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android mapView errors

package hello.google.map;

 

import com.google.android.maps.MapActivity;

import com.google.android.maps.MapView;

import android.os.Bundle;

 

public class MapsActivity extends MapActivity

{    

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    }

 

    @Override

    protected boolean isRouteDisplayed() {

        return false;

    }

}

       

Description Resource    Path    Location    Type

MapActivity cannot be resolved to a type    HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 7  Java Problem

MapActivity cannot be resolved to a type    HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 13 Java Problem

The import com.google cannot be resolved    HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 3  Java Problem

The import com.google cannot be resolved    HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 4  Java Problem

The method isRouteDisplayed() of type MapsActivity must override a superclass method    HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 18 Java Problem

The method onCreate(Bundle) of type MapsActivity must override a superclass method  HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 11 Java Problem

The method setContentView(int) is undefined for the type MapsActivity   HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 14 Java Problem

The public type MapsActivity must be defined in its own file    HelloGoogleMapsActivity.java    /HelloGoogleMaps/src/hello/google/map   line 7  Java Problem*

       

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

       

mapView = (MapView) findViewById(R.id.mapview);

    mapView.setBuiltInZoomControls(true);

       

<application android:icon="@drawable/icon" android:label="@string/app_name" >

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

 

 

</app...>