Logcat显示以下错误
03-26 17:41:51.770: ERROR/AndroidRuntime(479): FATAL EXCEPTION: main
03-26 17:41:51.770: ERROR/AndroidRuntime(479): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.sampled/com.sampled.main}: java.lang.ClassNotFoundException: com.sampled.main in loader dalvik.system.PathClassLoader[/data/app/com.sampled-2.apk]
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.os.Handler.dispatchMessage(Handler.java:99)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.os.Looper.loop(Looper.java:123)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at java.lang.reflect.Method.invokeNative(Native Method)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at java.lang.reflect.Method.invoke(Method.java:521)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at dalvik.system.NativeStart.main(Native Method)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): Caused by: java.lang.ClassNotFoundException: com.sampled.main in loader dalvik.system.PathClassLoader[/data/app/com.sampled-2.apk]
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
03-26 17:41:51.770: ERROR/AndroidRuntime(479): ... 11 more
我的代码如下
package com.sampled;
import java.util.ArrayList;
import java.util.List;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
public class main extends MapActivity {
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapView.setClickable(true);
Drawable marker=getResources().getDrawable(R.drawable.icon);
marker.setBounds(0, 0, marker.getIntrinsicWidth(),marker.getIntrinsicHeight());
InterestingLocations funPlaces = new InterestingLocations(marker);
mapView.getOverlays().add(funPlaces);
GeoPoint pt = funPlaces.getCenter(); // get the first-ranked point
mapView.getController().setCenter(pt);
mapView.getController().setZoom(15); // cheating. We could iterate
// and figure out a proper zoom.
}
@Override
protected boolean isLocationDisplayed() {
return false;
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
public void myClickHandler(View target) {
switch(target.getId()) {
case R.id.sat:
mapView.setSatellite(true);
break;
case R.id.street:
mapView.setStreetView(true);
break;
case R.id.traffic:
mapView.setTraffic(true);
break;
case R.id.normal:
mapView.setSatellite(false);
mapView.setStreetView(false);
mapView.setTraffic(false);
break;
}
}
class InterestingLocations extends ItemizedOverlay {
private List<OverlayItem> locations = new ArrayList<OverlayItem>();
private Drawable marker;
public InterestingLocations(Drawable marker)
{
super(marker);
this.marker=marker;
//5.34079, 100.28241 is IICP's lat and long
GeoPoint npark = new GeoPoint((int)(5.34079*1000000),(int)(100.28241*1000000));
locations.add(new OverlayItem(npark , "IICP", "IICP"));
populate();
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
boundCenterBottom(marker);
}
@Override
protected OverlayItem createItem(int i) {
return locations.get(i);
}
@Override
public int size() {
return locations.size();
}
}
}
清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.sampled"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".main"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<uses-library android:name="com.google.android.maps" />
</activity>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
</application>
</manifest>
xml文件是
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/mapview.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button android:id="@+id/sat" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Satellite"
android:onClick="myClickHandler" android:padding="8px" />
<Button android:id="@+id/street" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Street"
android:onClick="myClickHandler" android:padding="8px" />
<Button android:id="@+id/traffic" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Traffic"
android:onClick="myClickHandler" android:padding="8px" />
<Button android:id="@+id/normal" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Normal"
android:onClick="myClickHandler" android:padding="8px" />
</LinearLayout>
<com.google.android.maps.MapView
android:id="@+id/mapview" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:clickable="true"
android:apiKey="0hTcVSW3qp70ciSiaNSqesiGdbjEmewCc4FsHSA" />
</LinearLayout>
答案 0 :(得分：0)
您是否尝试过清洁项目？安静几次我已经通过这样做解决了这样的错误。不知道为什么会有效。
仔细阅读你的代码，没有任何内容跳出来，但我可能错过了一些东西
答案 1 :(得分：0)
你把你的班级称为“主要”。尝试将其重命名为其他内容，例如MyTestActivity或其他内容。我不确定'main'是否是保留关键字，就Android而言，它是在Java中并且保留用于方法调用，这是程序启动时的访问点。
答案 2 :(得分：0)
我清理了Project并重启了我的eclipse