这是一个带有两个按钮的屏幕，用于显示卫星视图和地图的街景。 streetview和SatelliteView的模块分别完美地工作。但当包含在具有两个按钮（意图）的单个应用程序中时，它会显示以下错误。请帮忙
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): FATAL EXCEPTION: main
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): java.lang.NoClassDefFoundError: com.uhcl.maps.StreetView
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at com.uhcl.maps.MymenuActivity.onClick(MymenuActivity.java:39)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at android.view.View$PerformClick.run(View.java:11928)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at android.os.Handler.handleCallback(Handler.java:587)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at android.os.Handler.dispatchMessage(Handler.java:92)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at android.os.Looper.loop(Looper.java:132)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at android.app.ActivityThread.main(ActivityThread.java:4025)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at java.lang.reflect.Method.invokeNative(Native Method)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at java.lang.reflect.Method.invoke(Method.java:491)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
10-16 16:33:20.400: ERROR/AndroidRuntime(15483): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
10-16 16:33:20.400: WARN/ActivityManager(130): Force finishing activity com.uhcl.maps/.MymenuActivity
这是我的Activity类
package com.uhcl.maps;`
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MymenuActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
Button satelliteviwb1, streetviewb2, floormapb3;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
satelliteviwb1 = (Button) findViewById(R.id.b1);
streetviewb2 = (Button) findViewById(R.id.b2);
floormapb3 = (Button) findViewById(R.id.flooricon);
satelliteviwb1.setOnClickListener(this);
streetviewb2.setOnClickListener(this);
floormapb3.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.b1:
Intent intent = new Intent(MymenuActivity.this, SatelliteView.class);
// Intent intent = new Intent("com.uhcl.maps.SATELLITEVIEW");
MymenuActivity.this.startActivity(intent);
case R.id.b2:
Intent intent2 = new Intent(MymenuActivity.this, StreetView.class);
// Intent intent2 = new Intent("com.uhcl.maps.STREETVIEW");
MymenuActivity.this.startActivity(intent2);
case R.id.flooricon:
Intent intent3 = new Intent(MymenuActivity.this, FloorView.class);
// Intent intent2 = new Intent("com.uhcl.maps.STREETVIEW");
MymenuActivity.this.startActivity(intent3);
}
}
}
这是我的地图活动
package com.uhcl.maps;
import java.util.List;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;
public class SatelliteView extends MapActivity {
public MapView mapView;
public CustomItemizedOverlay itemizedOverlay;
public Drawable drawable;
public List<Overlay> mapOverlays;
public MyLocationOverlay compass;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapOverlays = mapView.getOverlays();
drawable = this.getResources().getDrawable(R.drawable.icon);
itemizedOverlay = new CustomItemizedOverlay(
drawable, this);
//Latitude and Longitude
Float sscbla = 29.5843F;
Float sscblo = -95.098983F;
Float deltala = 29.577683F;
Float deltalo = -95.104208F;
Float csbla = 29.585831F;
Float csblo = -95.094133F;
Float arbourla = 29.577933F;
Float arbourlo = -95.102219F;
//Float bayoula= F;
//Float bayoulo= F;
GeoPoint point = new GeoPoint((int) (deltala * 1E6),
(int) (deltalo * 1E6));
OverlayItem overlayitem = new OverlayItem(point, "Hello",
"I'm at Uhcl, Delta building!");
GeoPoint point2 = new GeoPoint((int) (sscbla * 1E6),
(int) (sscblo * 1E6));
OverlayItem overlayitem2 = new OverlayItem(point2, "Hello",
"I'm at Uhcl, Student Services building!");
GeoPoint point3 = new GeoPoint((int) (csbla * 1E6),
(int) (csblo * 1E6));
OverlayItem overlayitem3 = new OverlayItem(point3, "Hello",
"I'm at Uhcl, Central Services building!");
GeoPoint point4 = new GeoPoint((int) (arbourla * 1E6),
(int) (arbourlo * 1E6));
OverlayItem overlayitem4 = new OverlayItem(point4, "Hello",
"I'm at Uhcl, Arbour building!");
/*GeoPoint point5 = new GeoPoint((int) (bayoula * 1E6),
(int) (bayoulo * 1E6));
OverlayItem overlayitem4 = new OverlayItem(point5, "Hello",
"I'm at Uhcl, Bayou building!");*/
itemizedOverlay.addOverlay(overlayitem);
itemizedOverlay.addOverlay(overlayitem2);
itemizedOverlay.addOverlay(overlayitem3);
itemizedOverlay.addOverlay(overlayitem4);
//itemizedOverlay.addOverlay(overlayitem5);
mapOverlays.add(itemizedOverlay);
mapView.setSatellite(true);
MapController mapController = mapView.getController();
mapController.animateTo(point2);
mapController.setZoom(17);
compass = new MyLocationOverlay(this, mapView);
mapView.getOverlays().add(compass);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
compass.disableCompass();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
compass.enableCompass();
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
}
答案 0 :(得分：1)
java.lang.NoClassDefFoundError: com.uhcl.maps.StreetView
通常意味着有问题的类不在CLASSPATH中。类加载器找不到它。
这是一个功课问题吗？您是否应该在项目中的某个位置拥有此站点的JAR？
http://prtl.uhcl.edu/portal/page/portal/HOMEPAGE/MAPS_DIRECTIONS/CampusMap