Android NoClassDefFoundError映射视图活动

我已将mapview活动添加到应用程序中，尝试打开mapview活动会导致崩溃。我不熟悉这个问题，这里的其他线程倾向于引用libs，我似乎没有，或者类路径，这可能是问题所在，但我并不真正理解它

正如您所看到的，它非常简单，没有其他MyMapViewer类

mainfest添加此库

并添加权限

 <!--permissions -->
     <uses-permission
         android:name="android.permission.INTERNET">
     </uses-permission>
     <uses-permission
         android:name="android.permission.ACCESS_FINE_LOCATION">
     </uses-permission>

MyMapView你放了什么

package

？您是否记得将此活动添加到清单中？MyMapView活动与其他活动位于同一个包中，只有一个包。是的，在舱单上。我也会在中编辑。请将代码发布到

updatewatherview（）

。您是否在

WeekSevenTwoActivity

中意外导入了其他

MyMapViewer

？（这可能会导致不同的异常…）嗯，它不会崩溃。非常感谢。MapView只是显示了网格，我制作的一个老应用现在也这样做了，这可能与谷歌改变api有关吗？

public class MyMapViewer extends MapActivity {
        /** Called when the activity is first created. */


        @Override
        public void onCreate(Bundle savedInstanceState) {//class begins
            super.onCreate(savedInstanceState);
            setContentView(R.layout.my_mapview);//sets the layout to the xml

            MapView mapView = (MapView) findViewById(R.id.mapview);//creates a new mapview initialisation
            mapView.setBuiltInZoomControls(true);//adds the zoom function to the map

            List<Overlay> mapOverlays = mapView.getOverlays();//the mapOverlay listobject is initialised to teh mapView
            Drawable drawable = this.getResources().getDrawable(R.drawable.station_icon);//points to marker icon
            MyItemizedOverlay itemizedoverlay = new MyItemizedOverlay(drawable, this);//instantiates Itemizer


            GeoPoint point = new GeoPoint((int)(54.684624 * 1e6),
                    (int)(-5.880218 * 1e6));//converts double cords to microdegrees for Geopoint
            OverlayItem overlayitem = new OverlayItem(point, "Jordanstown", "Shore Road, Newtownabbey, Belfast, Antrim BT370QB ");


            GeoPoint point1 = new GeoPoint((int)(54.66370520273512 * 1e6),
                    (int)(-5.930986404418945 * 1e6));//converts double cords to microdegrees for Geopoint
            OverlayItem overlayitem2 = new OverlayItem(point1, "Valley JuiJitsu Club", "Valley Park Newtownabbey BT36 6");

            GeoPoint point2 = new GeoPoint((int)(54.644600844283104 * 1e6),
                    (int)(-5.666391849517822 * 1e6));//converts double cords to microdegrees for Geopoint
            OverlayItem overlayitem3 = new OverlayItem(point2, "Peninsula Martial Arts", "3 Balloo Link, Bangor, Down BT19 7HJ");

            itemizedoverlay.addOverlay(overlayitem); //calls teh addOverlay method
            mapOverlays.add(itemizedoverlay);//adds above to the itemizedoverlay
         }//end of class





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

 <?xml version="1.0" encoding="utf-8"?> <manifest
 xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.b00517566.weekST"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk android:minSdkVersion="9" />
     <uses-permission android:name="android.permission.INTERNET"/>

     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name" >
         <activity
             android:name=".WeekSevenTwoActivity"
             android:label="@string/app_name" >

         </activity>
         <activity android:name="splash">
               <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
         <activity 

             android:name="MyMapViewer"
             android:theme="@android:style/Theme.NoTitleBar">

             </activity>
     </application>

 </manifest>

private void updateWeatherView() {      

startActivity(new Intent(this, MyMapViewer.class));
}//end of method

 <!--permissions -->
     <uses-permission
         android:name="android.permission.INTERNET">
     </uses-permission>
     <uses-permission
         android:name="android.permission.ACCESS_FINE_LOCATION">
     </uses-permission>