【发布时间】：2011-10-06 22:34:14
【问题描述】：
我正在努力寻找此代码锁定的原因。据我所知，我在清单文件中声明了正确的权限，如下所示。我曾尝试在实际设备（Droid x w./ 2.3.3）和 AVD 上运行它，但无济于事。我还附加了 logcat，这使我遇到了 classnotfound 异常。我已经清理了项目，并验证了 maps.jar 包含在 googleapi 的包中，我也将其用作应用程序的目标。 （谷歌 API 的 2.3.3）。不知道从这里去哪里。
Activity Code:
'package com.SmartPark;
import java.util.List;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.widget.LinearLayout;
//import android.widget.TextView;
import android.widget.Toast;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;
public class SmartParkActivity extends MapActivity {
//** Called when the activity is first created. */
LinearLayout linearlayout;
MapView mapView;
List<Overlay> mapOverlays;
Drawable drawable;
HelloItemizedOverlay itemizedOverlay;
GeoPoint point = new GeoPoint(42392400,-83134700);
OverlayItem overlayitem = new OverlayItem(point, "", "");
private LocationManager lm;
private LocationListener locationListener;
public double[] gps=new double[2];
public boolean setgps;
final Handler mHandler = new Handler();
//TextView tvl; //latitude display
// TextView tvlong;//longitude display
int lat2;
int longitude2;
public float z;
@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.greendot1);
itemizedOverlay = new HelloItemizedOverlay(drawable);
OverlayItem overlayitem = new OverlayItem(point, "", "");
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
// tvl = (TextView) this.findViewById(R.id.gpslview);
// tvlong = (TextView) this.findViewById(R.id.gpslongview);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
@Override
protected void onStart() {
super.onStart();
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationListener = new MyLocationListener();
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 100, 0,
locationListener);
mHandler.postDelayed(mUpdateTimeTask, 500);
}
@Override
protected void onStop() {
super.onStop();
lm.removeUpdates(locationListener);
mHandler.removeCallbacks(mUpdateTimeTask);
}
@Override
protected void onDestroy() {
super.onDestroy();
lm.removeUpdates(locationListener);
mHandler.removeCallbacks(mUpdateTimeTask);
}
//}
// helper method to schedule the postdelayed mhandler at specified interval
private boolean foo() {
setgps=false;
mHandler.postDelayed(mUpdateTimeTask, 500);
return true;
};
//Method to acquire set gps variable and display it. update overlay if possible
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
mapOverlays.clear();
GeoPoint point = setgeopoint(gps[0],gps[1]);
OverlayItem overlayitem = new OverlayItem(point, "", "");
mapOverlays.add(itemizedOverlay);
itemizedOverlay.addOverlay(overlayitem);
// tvl.setText("Latitude:"+gps[0]);
// tvlong.setText("Longitude"+gps[1]);
// z=(float)android.location.Location.getSpeed();
setgps=foo(); //reschedules the task
};
};
//math functions
//convert gps double to an int and set to GeoPoint
public GeoPoint setgeopoint (double dl, double dlong) {
int intl = (int) (dl*1000000);
int intlong = (int) (dlong*1000000);
GeoPoint point= new GeoPoint ( intl, intlong);
return point;
}
public class MyLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location loc)
{
if (loc != null) {
Toast.makeText(
getBaseContext(),
"Location changed : Lat: " + loc.getLatitude()
+ " Lng: " + loc.getLongitude(),
Toast.LENGTH_SHORT).show();
gps[0]= lat2;
gps[1]=longitude2;
gps[0] = loc.getLatitude();
gps[1] = loc.getLongitude();
z=loc.getSpeed();
}
}
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Disabled",Toast.LENGTH_SHORT ).show();
}
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Enabled",Toast.LENGTH_SHORT).show();
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
Toast.makeText( getApplicationContext(),"Status changed",Toast.LENGTH_SHORT).show();
}
}
}'
清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.SmartPark"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses- permission>
<uses-permission android:name="android.permission.ACCESS_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_GPS"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS"></uses-permission>
<application android:icon="@drawable/icon" android:label="@string/app_name">
<uses-library android:name="com.google.android.maps" />
<activity android:name=".MapviewActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Logcat：
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.SmartPark/com.SmartPark.MapviewActivity}: java.lang.ClassNotFoundException: com.SmartPark.MapviewActivity in loader dalvik.system.PathClassLoader[/system/framework/com.google.android.maps.jar:/data/app/com.SmartPark-2.apk]
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1618)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1716)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.app.ActivityThread.access$1500(ActivityThread.java:124)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:968)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.os.Handler.dispatchMessage(Handler.java:99)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.os.Looper.loop(Looper.java:123)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.app.ActivityThread.main(ActivityThread.java:3806)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at java.lang.reflect.Method.invokeNative(Native Method)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at java.lang.reflect.Method.invoke(Method.java:507)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at dalvik.system.NativeStart.main(Native Method)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): Caused by: java.lang.ClassNotFoundException: com.SmartPark.MapviewActivity in loader dalvik.system.PathClassLoader[/system/framework/com.google.android.maps.jar:/data/app/com.SmartPark-2.apk]
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1610)
10-06 09:19:07.239: ERROR/AndroidRuntime(13602): ... 11 more
【问题讨论】：
-
不要介意“使用图书馆”的位置。我发布了错误的清单。我将地图库移动为具有相同错误的应用程序标记的子项。固定清单如上所示。还是一样的错误
标签： android android-mapview classnotfoundexception