Develop Reference

Android App Crashes at Execution

please i tried coding an android app using eclipse luna. I am writing a client gcm codes to push notifications. I have finished without any compiling errors, but wen i execute it on the mobile phone, the app crashes. Please below is the log i have been getting. Thanks for helping
05-23 23:07:27.303: D/AndroidRuntime(18211): Shutting down VM
05-23 23:07:27.303: W/dalvikvm(18211): threadid=1: thread exiting with uncaught exception (group=0x41f522a0)
05-23 23:07:27.303: E/AndroidRuntime(18211): FATAL EXCEPTION: main
05-23 23:07:27.303: E/AndroidRuntime(18211): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.prgguru.example/com.prgguru.example.MainActivity}: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.prgguru.example/com.prgguru.example.HomeActivity}; have you declared this activity in your AndroidManifest.xml? 05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.ActivityThread.access$700(ActivityThread.java:140)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.os.Handler.dispatchMessage(Handler.java:99)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.os.Looper.loop(Looper.java:137)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.ActivityThread.main(ActivityThread.java:4921)
05-23 23:07:27.303: E/AndroidRuntime(18211): at java.lang.reflect.Method.invokeNative(Native Method)
05-23 23:07:27.303: E/AndroidRuntime(18211): at java.lang.reflect.Method.invoke(Method.java:511)
05-23 23:07:27.303: E/AndroidRuntime(18211): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
05-23 23:07:27.303: E/AndroidRuntime(18211): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
05-23 23:07:27.303: E/AndroidRuntime(18211): at dalvik.system.NativeStart.main(Native Method)
05-23 23:07:27.303: E/AndroidRuntime(18211): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activityclass {com.prgguru.example/com.prgguru.example.HomeActivity}; have you declared this activity in your AndroidManifest.xml?
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1556)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1431)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Activity.startActivityForResult(Activity.java:3428)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Activity.startActivityForResult(Activity.java:3389)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Activity.startActivity(Activity.java:3599)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Activity.startActivity(Activity.java:3567)
05-23 23:07:27.303: E/AndroidRuntime(18211): at com.prgguru.example.MainActivity.onCreate(MainActivity.java:61)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Activity.performCreate(Activity.java:5188)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
05-23 23:07:27.303: E/AndroidRuntime(18211): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
05-23 23:07:27.303: E/AndroidRuntime(18211): ... 11 more
05-23 23:07:27.343: D/dalvikvm(18211): GC_CONCURRENT freed 224K, 13% free 7212K/8199K, paused 12ms+2ms, total 35ms
below is also my manifest file. this is how i make the manifest file
`<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.prgguru.example"
android:versionCode="1"
android:versionName="1.0" >
<!-- GCM requires Android SDK version 2.2 (API level 8) or above. -->
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="22" />
<!-- GCM connects to Internet Services. -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- GCM requires a Google account. -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<!-- Keeps the processor from sleeping when a message is received. -->
<uses-permission android:name="android.permission.WAKE_LOCK" />
<!-- Creates a custom permission so only this app can receive its messages. -->
<permission
android:name="com.prgguru.example.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.prgguru.example.permission.C2D_MESSAGE" />
<!-- This app has permission to register and receive data message. -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<!-- Network State Permissions to detect Internet status -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<!-- Permission to vibrate -->
<uses-permission android:name="android.permission.VIBRATE" />
<!-- Main activity. -->
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<meta-data android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<!-- Register Activity -->
<activity
android:name=".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>
<receiver
android:name="com.google.android.gcm.GCMBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<!-- Receives the actual messages. -->
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<!-- Receives the registration id. -->
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.prgguru.example" />
</intent-filter>
</receiver>
<service android:name=".GCMNotificationIntentService" />
</application>
</manifest>`

Whenever you make a new Activity and are going to display it you need to add a reference to it in your AndroidManifest.xml
For example you can simply do
<activity name="your.package.activityname" />
For more information see, Declaring class names in the documentation.

Starting an alarm manager application on reboot

Presently, I am working on app that sets the phone into the vibration mode or the ringer mode at the selected time. I have successfully implemented this using the alarmmanager in my application.
I want my app to remember all the pending intents when the phone is rebooted.
I found a sample code in the internet, but it seems to crash my app when the phone is rebooted. I don't know what's going wrong.
Here is alarmreciever.java
package ishan.khandelwal.vitsilentmode;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.widget.Toast;
public class AlarmReciever extends BroadcastReceiver
{
private AudioManager mAudioManager;
#Override
public void onReceive(Context context, Intent intent)
{
// TODO Auto-generated method stub
if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {
Intent serviceIntent = new Intent("ishan.khandelwal.vitsilentmode");
context.startService(serviceIntent);
}
mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
mAudioManager.setRingerMode(AudioManager.RINGER_MODE_VIBRATE);
// Show the toast
Toast.makeText(context, "Vibration Mode", Toast.LENGTH_SHORT).show();
}
}
Android manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ishan.khandelwal.vitsilentmode"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<!-- permission required to use Alarm Manager -->
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<receiver
android:name=".receiver.StartMyServiceAtBootReceiver"
android:enabled="true"
android:exported="true"
android:label="StartMyServiceAtBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<activity
android:name="ishan.khandelwal.vitsilentmode.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="ishan.khandelwal.vitsilentmode.GetSlots"
android:label="Select your slots"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="ishan.khandelwal.vitsilentmode.MorningSlots"
android:label="Select your morning slots"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="ishan.khandelwal.vitsilentmode.EveningSlots"
android:label="Select your evening slots"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="ishan.khandelwal.vitsilentmode.Labs"
android:label="Select your lab slots"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="ishan.khandelwal.vitsilentmode.About"
android:label="About"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="ishan.khandelwal.vitsilentmode.AlarmReciever"
android:label="AlarmReciever" >
</activity>
<!-- Register the Alarm Receiver -->
<receiver android:name=".AlarmReciever"/>
<activity
android:name="ishan.khandelwal.vitsilentmode.RingerMode"
android:label="RingerMode" >
</activity>
<!-- Register the Alarm Receiver -->
<receiver android:name=".RingerMode"/>
</application>
Logcat:
07-23 23:33:12.057: I/ActivityManager(858): Start proc com.android.providers.calendar for broadcast com.android.providers.calendar/.CalendarReceiver: pid=1116 uid=10023 gids={3003}
07-23 23:33:12.067: I/ActivityThread(1116): Pub com.android.calendar: com.android.providers.calendar.CalendarProvider2
07-23 23:33:12.087: I/SurfaceFlinger(858): Boot is finished (2041 ms)
07-23 23:33:12.128: I/ActivityManager(858): Start proc ishan.khandelwal.vitsilentmode for broadcast ishan.khandelwal.vitsilentmode/.receiver.StartMyServiceAtBootReceiver: pid=1127 uid=10031 gids={}
07-23 23:33:12.137: D/AndroidRuntime(1127): Shutting down VM
07-23 23:33:12.137: W/dalvikvm(1127): threadid=1: thread exiting with uncaught exception (group=0xb6fac4f0)
07-23 23:33:12.137: E/AndroidRuntime(1127): FATAL EXCEPTION: main
07-23 23:33:12.137: E/AndroidRuntime(1127): java.lang.RuntimeException: Unable to instantiate receiver ishan.khandelwal.vitsilentmode.receiver.StartMyServiceAtBootReceiver: java.lang.ClassNotFoundException: ishan.khandelwal.vitsilentmode.receiver.StartMyServiceAtBootReceiver in loader dalvik.system.PathClassLoader[/data/app/ishan.khandelwal.vitsilentmode-1.apk]
07-23 23:33:12.137: E/AndroidRuntime(1127): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1773)
07-23 23:33:12.137: E/AndroidRuntime(1127): at android.app.ActivityThread.access$2400(ActivityThread.java:117)
07-23 23:33:12.137: E/AndroidRuntime(1127): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:981)
07-23 23:33:12.137: E/AndroidRuntime(1127): at android.os.Handler.dispatchMessage(Handler.java:99)
07-23 23:33:12.137: E/AndroidRuntime(1127): at android.os.Looper.loop(Looper.java:130)
07-23 23:33:12.137: E/AndroidRuntime(1127): at android.app.ActivityThread.main(ActivityThread.java:3683)
07-23 23:33:12.137: E/AndroidRuntime(1127): at java.lang.reflect.Method.invokeNative(Native Method)
07-23 23:33:12.137: E/AndroidRuntime(1127): at java.lang.reflect.Method.invoke(Method.java:507)
07-23 23:33:12.137: E/AndroidRuntime(1127): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-23 23:33:12.137: E/AndroidRuntime(1127): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-23 23:33:12.137: E/AndroidRuntime(1127): at dalvik.system.NativeStart.main(Native Method)
07-23 23:33:12.137: E/AndroidRuntime(1127): Caused by: java.lang.ClassNotFoundException: ishan.khandelwal.vitsilentmode.receiver.StartMyServiceAtBootReceiver in loader dalvik.system.PathClassLoader[/data/app/ishan.khandelwal.vitsilentmode-1.apk]
07-23 23:33:12.137: E/AndroidRuntime(1127): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
07-23 23:33:12.137: E/AndroidRuntime(1127): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
07-23 23:33:12.137: E/AndroidRuntime(1127): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
07-23 23:33:12.137: E/AndroidRuntime(1127): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1764)
07-23 23:33:12.137: E/AndroidRuntime(1127): ... 10 more
Thanks for the help in advance.

Ok, the problem is that you have specified in your AndroidManifest the wrong/a nonexistent receiver implementation. You specified this:
<receiver
android:name=".receiver.StartMyServiceAtBootReceiver"
android:enabled="true"
android:exported="true"
android:label="StartMyServiceAtBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
The problem is you have no class called StartMyServiceAtBootReceiver. What you I think you should have is something like this:
<receiver
android:name=".AlarmReceiver"
android:enabled="true"
android:exported="true"
android:label="StartMyServiceAtBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>

Android app does not start in emulator or device

I have finally finished my app and everything was working fine. I went back to add in the admob stuff and now it will not start in the emulator. it says it successfully installed the app on the emulator but it does not launch and the icon is not visible to try to manually run. I think the manifest is where my error is but I am unsure.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.androidsleepmachine.gamble"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.WAKE_LOCK" >
</uses-permission>
<uses-permission android:name="android.permission.Internet" >
</uses-permission>
<uses-permission android:name="android.permission.Write_EXTERNAL_STORAGE" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >
</uses-permission>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation"
></activity>
<activity
android:name=".Splash"
android:label="#string/app_name"
android:theme="#android:style/Theme.Dialog" >
<intent-filter>
<action android:name="com.AndroidSleepMachine.gamble.SPLASH" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="com.AndroidSleepMachine.gamble.HOME"
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=".About"
android:label="#string/app_name"
android:theme="#android:style/Theme.Dialog" >
<intent-filter>
<action android:name="com.AndroidSleepMachine.gamble.ABOUT" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name="com.androidsleepmachine.gamble.Ship" />
<activity android:name="com.androidsleepmachine.gamble.OceanThunder" />
<activity android:name="com.androidsleepmachine.gamble.Ocean" />
<activity android:name="com.androidsleepmachine.gamble.Forest" />
<activity android:name="com.androidsleepmachine.gamble.Rain" />
<activity android:name="com.androidsleepmachine.gamble.Thunderbirds" />
<activity android:name="com.androidsleepmachine.gamble.Meditation" />
<activity android:name="com.androidsleepmachine.gamble.Focus" />
<activity android:name="com.androidsleepmachine.gamble.Pain" />
</application>
</manifest>
logcat files
09-23 13:17:47.582: E/AndroidRuntime(1563): FATAL EXCEPTION: main
09-23 13:17:47.582: E/AndroidRuntime(1563): java.lang.RuntimeException: Unable to
instantiate activity
ComponentInfo{com.androidsleepmachine.gamble/com.AndroidSleepMachine.gamble.HOME}:
java.lang.ClassNotFoundException: com.AndroidSleepMachine.gamble.HOME
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.app.ActivityThread.access$600(ActivityThread.java:130)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.os.Handler.dispatchMessage(Handler.java:99)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.os.Looper.loop(Looper.java:137)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.app.ActivityThread.main(ActivityThread.java:4745)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
java.lang.reflect.Method.invokeNative(Native Method)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
java.lang.reflect.Method.invoke(Method.java:511)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
dalvik.system.NativeStart.main(Native Method)
09-23 13:17:47.582: E/AndroidRuntime(1563): Caused by:
java.lang.ClassNotFoundException: com.AndroidSleepMachine.gamble.HOME
09-23 13:17:47.582: E/AndroidRuntime(1563): at
dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
java.lang.ClassLoader.loadClass(ClassLoader.java:501)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
java.lang.ClassLoader.loadClass(ClassLoader.java:461)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.app.Instrumentation.newActivity(Instrumentation.java:1053)
09-23 13:17:47.582: E/AndroidRuntime(1563): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974)

It looks like your main activity name is incorrect. Java is case sensitive and your application package name is
package="com.androidsleepmachine.gamble"
while your main activity class name is
com.AndroidSleepMachine.gamble.HOME
The ClassNotFoundException is being thrown because your Activity class name is incorrect in the manifest and isn't being found by the class loader.

It cannot find a class called:
com.AndroidSleepMachine.gamble.HOME
Why is "AndroidSleepMachine" using capital letters?
Why not just use:
android:name=".HOME"
...if your class is indeed called HOME.java? Case-sensitivity may be causing your issue.
com.AndroidSleepMachine.gamble.HOME is not the same as com.androidsleepmachine.gamble.HOME

GCM application works fine on emulator but crashes on android device

I have developed an application and implemented GCM(Google Cloud Messaging), it works perfectly fine on the emulator as well as on bluestacks but when I run it on a device it stops unfortunately and I can't get the reason.
Manifest file
<uses-sdk android:minSdkVersion="8" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.androiddemos.NotificationActivity"
android:label="#string/app_name" >
</activity>
<activity
android:name=".ResultActivity"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".NotificationActivity" />
</activity>
<activity
android:name=".GcmActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name="com.google.android.gcm.GCMBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.example.androiddemos" />
</intent-filter>
</receiver>
<service android:name=".GCMIntentService" >
</service>
</application>
<permission
android:name="com.example.androiddemos.permission.C2D_MESSAGE"
android:protectionLevel="signature" >
</permission>
<!-- App receives GCM messages. -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<!-- GCM connects to Google Services. -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- GCM requires a Google account. -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<!-- Keeps the processor from sleeping when a message is received. -->
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.example.androiddemos.permission.C2D_MESSAGE" />
LOgcat
01-09 14:55:27.034: E/AndroidRuntime(25344): java.lang.IllegalArgumentException: android.content.pm.PackageManager$NameNotFoundException: ComponentInfo{com.example.androiddemos/com.example.androiddemos.MainActivity}
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.support.v4.app.TaskStackBuilder.addParentStack(TaskStackBuilder.java:236)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.support.v4.app.TaskStackBuilder.addParentStack(TaskStackBuilder.java:215)
01-09 14:55:27.034: E/AndroidRuntime(25344): at com.example.androiddemos.GcmActivity.sendNotification(GcmActivity.java:70)
01-09 14:55:27.034: E/AndroidRuntime(25344): at com.example.androiddemos.GcmActivity.checkGCM(GcmActivity.java:49)
01-09 14:55:27.034: E/AndroidRuntime(25344): at com.example.androiddemos.GcmActivity$1.onClick(GcmActivity.java:33)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.view.View.performClick(View.java:4084)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.view.View$PerformClick.run(View.java:16966)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.os.Handler.handleCallback(Handler.java:615)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.os.Handler.dispatchMessage(Handler.java:92)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.os.Looper.loop(Looper.java:137)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-09 14:55:27.034: E/AndroidRuntime(25344): at java.lang.reflect.Method.invokeNative(Native Method)
01-09 14:55:27.034: E/AndroidRuntime(25344): at java.lang.reflect.Method.invoke(Method.java:511)
01-09 14:55:27.034: E/AndroidRuntime(25344): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-09 14:55:27.034: E/AndroidRuntime(25344): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-09 14:55:27.034: E/AndroidRuntime(25344): at dalvik.system.NativeStart.main(Native Method)
01-09 14:55:27.034: E/AndroidRuntime(25344): Caused by: android.content.pm.PackageManager$NameNotFoundException: ComponentInfo{com.example.androiddemos/com.example.androiddemos.MainActivity}
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.app.ApplicationPackageManager.getActivityInfo(ApplicationPackageManager.java:225)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.support.v4.app.NavUtils.getParentActivityName(NavUtils.java:298)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.support.v4.app.NavUtils.getParentActivityIntent(NavUtils.java:261)
01-09 14:55:27.034: E/AndroidRuntime(25344): at android.support.v4.app.TaskStackBuilder.addParentStack(TaskStackBuilder.java:229)
01-09 14:55:27.034: E/AndroidRuntime(25344): ... 15 more

I believe the problem is because you do not have MainActivity defined in your manifest based on this logcat line:
14:55:27.034: E/AndroidRuntime(25344): Caused by:
android.content.pm.PackageManager$NameNotFoundException:
ComponentInfo{com.example.androiddemos/com.example.androiddemos.MainActivity} 01-09
You have MainActivity referenced as the parentActivityName but not defined in the manifest at all:
<activity
android:name=".ResultActivity"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".NotificationActivity" />
</activity>
If you are still using MainActivity you will need to add it to the manifest:
<activity
android:name=".MainActivity">
</activity>

Android ClassNotFoundException on published app

I have an application thats been published awhile on Google play, I have been fixing reported bugs as they come in but recently this log below came in and I don't know what to make of it:
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mammothtooth.flightinfo/com.mammothtooth.flightinfo.ui.SplashActivity}: java.lang.ClassNotFoundException: com.mammothtooth.flightinfo.ui.SplashActivity in loader dalvik.system.PathClassLoader[/system/framework/com.google.android.maps.jar:/mnt/asec/com.mammothtooth.flightinfo-1/pkg.apk]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1743)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1851)
at android.app.ActivityThread.access$1500(ActivityThread.java:132)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1038)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:150)
at android.app.ActivityThread.main(ActivityThread.java:4277)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: com.mammothtooth.flightinfo.ui.SplashActivity in loader dalvik.system.PathClassLoader[/system/framework/com.google.android.maps.jar:/mnt/asec/com.mammothtooth.flightinfo-1/pkg.apk]
at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at android.app.Instrumentation.newActivity(Instrumentation.java:1040)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1735)
Does anyone know anything about this type of error log? My SplashScreenActivity is there and its defined as the entry point of the application in the manifest as follows:
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/Theme.Sherlock" >
<uses-library android:name="com.google.android.maps" />
<activity
android:label="#string/app_name"
android:name=".ui.SplashActivity"
android:theme="#android:style/Theme.NoTitleBar"
android:configChanges="keyboard|keyboardHidden|orientation"
android:screenOrientation="portrait">
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Would the placing of the uses-library be an issue in the manifest?
I can't reproduce this issue on any of my android devices so any help is greatly appreciated in locating what might be the cause of this issue.