同様の種類のエラーをたくさん検索しましたが、解決策が得られません。アプリを起動するとすぐにこのエラーが発生します
03-21 10:33:08.100: E/AndroidRuntime(13098): FATAL EXCEPTION: main
03-21 10:33:08.100: E/AndroidRuntime(13098): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.airlife/com.example.airlife.MainActivity}: java.lang.ClassNotFoundException: com.example.airlife.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.airlife-2.apk]
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1785)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1893)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.app.ActivityThread.access$1500(ActivityThread.java:135)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1054)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.os.Handler.dispatchMessage(Handler.java:99)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.os.Looper.loop(Looper.java:150)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.app.ActivityThread.main(ActivityThread.java:4389)
03-21 10:33:08.100: E/AndroidRuntime(13098): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 10:33:08.100: E/AndroidRuntime(13098): at java.lang.reflect.Method.invoke(Method.java:507)
03-21 10:33:08.100: E/AndroidRuntime(13098): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
03-21 10:33:08.100: E/AndroidRuntime(13098): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
03-21 10:33:08.100: E/AndroidRuntime(13098): at dalvik.system.NativeStart.main(Native Method)
03-21 10:33:08.100: E/AndroidRuntime(13098): Caused by: java.lang.ClassNotFoundException: com.example.airlife.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.airlife-2.apk]
03-21 10:33:08.100: E/AndroidRuntime(13098): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
03-21 10:33:08.100: E/AndroidRuntime(13098): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
03-21 10:33:08.100: E/AndroidRuntime(13098): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.app.Instrumentation.newActivity(Instrumentation.java:1040)
03-21 10:33:08.100: E/AndroidRuntime(13098): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1777)
03-21 10:33:08.100: E/AndroidRuntime(13098): ... 11 more
MainActivity.javaはこのようなものです
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import android.os.Bundle;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;
public class MainActivity extends MapActivity implements OnClickListener{
private ImageButton mVid,mAgebtn,mWeightbtn,mPicbtn,mMsgbtn,mReqbtn,mHelibtn,mDocbtn,mContextbtn;
private MapView mapView;
private MyLocationOverlay myLocationOverlay;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mapView = (MapView)findViewById(R.id.webview);
mapView.setBuiltInZoomControls(true);
myLocationOverlay = new MyLocationOverlay(this, mapView);
mapView.getOverlays().add(myLocationOverlay);
mapView.postInvalidate();
// call convenience method that zooms map on our location
zoomToMyLocation();
mAgebtn = (ImageButton) findViewById(R.id.imageView36);
mWeightbtn = (ImageButton) findViewById(R.id.imageView4);
mPicbtn = (ImageButton) findViewById(R.id.imageView5);
mMsgbtn = (ImageButton) findViewById(R.id.imageView6);
mReqbtn = (ImageButton) findViewById(R.id.imageView32);
mHelibtn = (ImageButton) findViewById(R.id.btnsearch);
mDocbtn = (ImageButton) findViewById(R.id.btnprovide);
mVid = (ImageButton) findViewById(R.id.btnpost);
mContextbtn = (ImageButton) findViewById(R.id.btnsettings);
mAgebtn.setOnClickListener(this);
mWeightbtn.setOnClickListener(this);
mPicbtn.setOnClickListener(this);
mMsgbtn.setOnClickListener(this);
mReqbtn.setOnClickListener(this);
mHelibtn.setOnClickListener(this);
mDocbtn.setOnClickListener(this);
mVid.setOnClickListener(this);
mContextbtn.setOnClickListener(this);
}
@Override
protected void onResume() {
super.onResume();
// when our activity resumes, we want to register for location updates
myLocationOverlay.enableMyLocation();
}
@Override
protected void onPause() {
super.onPause();
// when our activity pauses, we want to remove listening for location updates
myLocationOverlay.disableMyLocation();
}
/**
* This method zooms to the user's location with a zoom level of 10.
*/
private void zoomToMyLocation() {
GeoPoint myLocationGeoPoint = myLocationOverlay.getMyLocation();
if(myLocationGeoPoint != null) {
mapView.getController().animateTo(myLocationGeoPoint);
mapView.getController().setZoom(10);
}
else {
Toast.makeText(this, "Cannot determine location", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
マニフェストファイル:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.airlife"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.airlife.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".playvid" />
<activity android:name=".Display" />
<activity android:name=".Video" />
<activity android:name=".Documents" />
<activity android:name=".Contact" />
<activity android:name=".FixedMyLocationOverlay" />
</application>
</manifest>
このエラーが発生する理由とその解決方法を教えてください。