i searched lot similar kind of error, not getting solution it. getting error start app
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 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): @ android.app.activitythread.performlaunchactivity(activitythread.java:1785) 03-21 10:33:08.100: e/androidruntime(13098): @ android.app.activitythread.handlelaunchactivity(activitythread.java:1893) 03-21 10:33:08.100: e/androidruntime(13098): @ android.app.activitythread.access$1500(activitythread.java:135) 03-21 10:33:08.100: e/androidruntime(13098): @ android.app.activitythread$h.handlemessage(activitythread.java:1054) 03-21 10:33:08.100: e/androidruntime(13098): @ android.os.handler.dispatchmessage(handler.java:99) 03-21 10:33:08.100: e/androidruntime(13098): @ android.os.looper.loop(looper.java:150) 03-21 10:33:08.100: e/androidruntime(13098): @ android.app.activitythread.main(activitythread.java:4389) 03-21 10:33:08.100: e/androidruntime(13098): @ java.lang.reflect.method.invokenative(native method) 03-21 10:33:08.100: e/androidruntime(13098): @ java.lang.reflect.method.invoke(method.java:507) 03-21 10:33:08.100: e/androidruntime(13098): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:849) 03-21 10:33:08.100: e/androidruntime(13098): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:607) 03-21 10:33:08.100: e/androidruntime(13098): @ 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): @ dalvik.system.pathclassloader.findclass(pathclassloader.java:240) 03-21 10:33:08.100: e/androidruntime(13098): @ java.lang.classloader.loadclass(classloader.java:551) 03-21 10:33:08.100: e/androidruntime(13098): @ java.lang.classloader.loadclass(classloader.java:511) 03-21 10:33:08.100: e/androidruntime(13098): @ android.app.instrumentation.newactivity(instrumentation.java:1040) 03-21 10:33:08.100: e/androidruntime(13098): @ android.app.activitythread.performlaunchactivity(activitythread.java:1777) 03-21 10:33:08.100: e/androidruntime(13098): ... 11 more mainactivity.java
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 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, want register location updates mylocationoverlay.enablemylocation(); } @override protected void onpause() { super.onpause(); // when our activity pauses, want remove listening location updates mylocationoverlay.disablemylocation(); } /** * method zooms user's location 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; } manifest file:
<?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> please tell me why getting error, , how solve this.
got solution. had missed code in manifest file
<uses-library android:name="com.google.android.maps"/> 
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