I'm a bit stuck on this. Android is throwing a ClassNotFoundException even though there is such a class.
04-20 09:07:50.179: E/AndroidRuntime(525): FATAL EXCEPTION: main
04-20 09:07:50.179: E/AndroidRuntime(525): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.company.app/com.company.app.Main}: java.lang.ClassNotFoundException: com.company.app.Main
04-20 09:07:50.179: E/AndroidRuntime(525): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1880)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.app.ActivityThread.access$600(ActivityThread.java:123)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.os.Handler.dispatchMessage(Handler.java:99)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.os.Looper.loop(Looper.java:137)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.app.ActivityThread.main(ActivityThread.java:4424)
04-20 09:07:50.179: E/AndroidRuntime(525): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 09:07:50.179: E/AndroidRuntime(525): at java.lang.reflect.Method.invoke(Method.java:511)
04-20 09:07:50.179: E/AndroidRuntime(525): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-20 09:07:50.179: E/AndroidRuntime(525): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-20 09:07:50.179: E/AndroidRuntime(525): at dalvik.system.NativeStart.main(Native Method)
04-20 09:07:50.179: E/AndroidRuntime(525): Caused by: java.lang.ClassNotFoundException: com.company.app.Main
04-20 09:07:50.179: E/AndroidRuntime(525): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
04-20 09:07:50.179: E/AndroidRuntime(525): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
04-20 09:07:50.179: E/AndroidRuntime(525): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
04-20 09:07:50.179: E/AndroidRuntime(525): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1871)
04-20 09:07:50.179: E/AndroidRuntime(525): ... 11 more
There is such a class called Main in Main.java.
public class Main extends FragmentActivity which is in the package com.company.app.
It was working before but when I went back to work on the app today it just stopped working. I don't know what happened.
It is defined correctly in the Manifest.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.company.app"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="4" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.Light" >
<activity
android:label="#string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Few things I've tried:
Restarting Eclipse
Restarting the emulator
Uninstalling and reinstalling the app in the emulator
Cleaning the project.
Checking if gen and src is in the Source tab of the build path.
As it looks right now, I may have to abandon the current project and start from scratch.
Any help would be much appreciated.
UPDATE:
The app works if Main extends Activity instead of FragmentActivity. Perhaps it is something with the Android Support package?
UPDATE 2:
I'm pretty sure it is. When I don't use the support package and I use the normal Fragment classes in Android 3.0 and up, the app works fine.
The problem is now fixed. :)
For some reason the Android support package removed itself from the /libs directory in the project and it was referencing it from an external location (outside the workspace directory).
I will mark Abdu Egal's first answer as correct as he directed me on the right track.
It seems that there is an error in the onCreate of your main activity. Did you provide an onCreate(Bundle savedInstance) if so , try to clear it and see if it works then.
If that does not work, try to use extend Activity instead of extend FrameActivity.
Good luck
From your quition detail i assume that you forgot to declare your FrameActivity into AndroidManifest.xml , kindly check your AndroidManifest.xml file entry.
I think you used the FragmentActivity the wrong way, I guess FragmentActivities should be a part of a normal activity, see below:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<fragment
android:name="com.mamlambo.tutorial.tutlist.TutListFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="#+id/tutlist_fragment"
android:layout_weight="45">
</fragment>
<fragment
android:name="com.mamlambo.tutorial.tutlist.TutViewerFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="#+id/tutview_fragment"
android:layout_weight="55">
</fragment>
</LinearLayout>
Taken from this link (part 9)
http://mobile.tutsplus.com/tutorials/android/android-sdk_fragments/
Right click on your project folder => Properties => Java Build Path => Order and Export => check the box "Android Private Libraries" if not checked. Make a clean. And it works !
I got the same problem with MobilTuts sample, problem was with support library.
I have changed the build target to a higher API than 10, something like 15 for example, and then all errors vanished.
Project Properties --> Android --> Project Build Target --> Set it to 15 .e.g
Recommendation: set MIN API inside manifest to 8 at lest.
Related
I recently moved to MoPub and it all appears to be working well except for I have started getting this exception saying that com.millennialmedia.android.VideoPlayer can not be found. I looked and it isn't on the Millennial jar (I just got the latest from their site). Also my AndroidManifest mentions that class and Android Studio also says it can't be found.
This is what I have there:
<activity android:name="com.millennialmedia.android.MMActivity" android:theme="#android:style/Theme.Translucent.NoTitleBar" android:configChanges="keyboardHidden|orientation|keyboard" />
<activity android:name="com.millennialmedia.android.VideoPlayer" android:configChanges="keyboardHidden|orientation|keyboard" />
On Android Studio the VideoPlayer part is red.
This is the exception I got:
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{mypackage/com.millennialmedia.android.VideoPlayer}: java.lang.ClassNotFoundException: Didn't find class "com.millennialmedia.android.VideoPlayer" on path: /data/app/mypackage-1.apk
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Method.java)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(NativeStart.java)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.millennialmedia.android.VideoPlayer" on path: /data/app/mypackage-1.apk
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Method.java)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(NativeStart.java)
Looking at the latest Millennial Media documentation, it looks like
com.millennialmedia.android.VideoPlayer
isn't included. This may be an update that needs to be made.
Alice
I'm Naive in Android development. I tried to use flow/mortar for development and stuck with an exception.
Here's what I did. In Eclipse, I chose New (Crtl N) -> Android Project from existing code and imported the flow sample downloaded from the square flow website https://github.com/square/flow/.
Eclipse marked errors in all the files as the package name was not matching the file's location. So to fix the package mismatch issue, I moved the files from : \flow-master\flow-sample\src\main\java\com\example\flow to : \flow-master\flow-sample\src\com\example\flow.
After this, I got some more errors saying 'Unresolved to a Type' which I fixed by importing proper jar files. Now all the errors are cleared and I tried to install and launch the app.
The app crashes as soon as we launch with the Logcat error below:
E/AndroidRuntime(5438): FATAL EXCEPTION: main
E/AndroidRuntime(5438): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.flow/com.example.flow.MainActivity}: java.lang.ClassNotFoundException: com.example.flow.MainActivity
E/AndroidRuntime(5438): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1888)
E/AndroidRuntime(5438): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1989)
E/AndroidRuntime(5438): at android.app.ActivityThread.access$600(ActivityThread.java:126)
E/AndroidRuntime(5438): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1155)
E/AndroidRuntime(5438): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(5438): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(5438): at android.app.ActivityThread.main(ActivityThread.java:4482)
E/AndroidRuntime(5438): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(5438): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(5438): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
E/AndroidRuntime(5438): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
E/AndroidRuntime(5438): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(5438): Caused by: java.lang.ClassNotFoundException: com.example.flow.MainActivity
E/AndroidRuntime(5438): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
E/AndroidRuntime(5438): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
E/AndroidRuntime(5438): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
E/AndroidRuntime(5438): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
E/AndroidRuntime(5438): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1879)
E/AndroidRuntime(5438): ... 11 more
The error says that the file MainActivity is not found even when the file is available in the path com.example.flow.. Can someone please help me understand what the issue is?
Android Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.flow"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="18"/>
<application
android:icon="#drawable/flow_icon">
<activity
android:label="Flow"
android:name="com.example.flow.MainActivity"
android:theme="#android:style/Theme.Holo.Light.DarkActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
I have a project that uses the GoogleMaps API, and the support library for Fragments. I have a working map in one activity already, so I know that the API and library are all set up right. I am trying to add a map in a fragment as part of a new activity.
The activity extends an android.support.v4.app.FragmentActivity, and the xml file contains:
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="250dp"
android:name="com.google.android.gms.maps.SupportMapFragment" />
But when I run I get the error:
01-20 11:58:31.535: ERROR/AndroidRuntime(5389): FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
at com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown Source)
at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:279)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
at android.app.Activity.setContentView(Activity.java:1835)
at com.yedidyak.gpsalarm.AddAlarm.onCreate(AddAlarm.java:19)
at android.app.Activity.performCreate(Activity.java:4465)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
All the information I can find about this error is about not having the google-play-lib properly installed both as a jar and an imported module, but I have that done - and a working map in another activity.
Any ideas?
You have to reference google play services library instead of adding jar and map_attrs.xml (and other files, like strings.xml) to your project.
If you do, you also might have deleted res/values/map_attrs.xml by accident.
am getting this exception:
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{business.premium/business.premium.Problemio}:
java.lang.ClassNotFoundException: business.premium.Problemio
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1880)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: business.premium.Problemio
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1871)
... 11 more
java.lang.ClassNotFoundException: business.premium.Problemio
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1871)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
it says that class is not there, but it IS there. I tried to configure things in my project's build path, but not too sure what to tweak there.
And here is how I start my Manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="business.premium"
android:versionCode="1"
android:versionName="1.0" >
<supports-screens android:largeScreens="true" android:normalScreens="true" android:smallScreens="true"/>
<uses-sdk android:minSdkVersion="4" android:targetSdkVersion="15"/>
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/CustomTheme"
android:name="MyApplication"
android:debuggable="true">
<activity
android:name=".Problemio"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Any thoughts on how to solve this, or what to look into? Thanks!
Its because you specified the "android:name" attribute in the application node in the manifest file.
Do not use the android:name attribute!
It, misleadingly, does not have anything to do with the name of your app and is actually the name of an extra class to load before loading your application. That's why you are getting the ClassNotFoundException.
Remove it and it should work:
<application
android:icon="#drawable/icon"
android:label="#string/app_name"
android:description="#string/help_text" >
This answer is taken from: java.lang.ClassNotFoundException on working app
I have a working Android application. It works on more than 500 different devices. The manifest is
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="info.decamps.droid.photoid" android:versionCode="5"
android:versionName="1.4">
<application android:icon="#drawable/icon" android:label="#string/app_label"
android:name="PhotoIDroid" android:description="#string/app_desc"
android:debuggable="FALSE">
But when it it launched from a Samsung Galaxy Tab, it doesn't start and crashes with:
java.lang.RuntimeException: Unable to
instantiate application
info.decamps.droid.photoid.PhotoIDroid:
java.lang.ClassNotFoundException:
info.decamps.droid.photoid.PhotoIDroid
in loader
dalvik.system.PathClassLoader[/data/app/info.decamps.droid.photoid-1.apk]
at
android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:670)
at
android.app.ActivityThread.handleBindApplication(ActivityThread.java:4483)
at
android.app.ActivityThread.access$3000(ActivityThread.java:135)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2181)
at
android.os.Handler.dispatchMessage(Handler.java:99)
at
android.os.Looper.loop(Looper.java:144)
at
android.app.ActivityThread.main(ActivityThread.java:4937)
at
java.lang.reflect.Method.invokeNative(Native
Method) at
java.lang.reflect.Method.invoke(Method.java:521)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at
dalvik.system.NativeStart.main(Native
Method) Caused by:
java.lang.ClassNotFoundException:
info.decamps.droid.photoid.PhotoIDroid
in loader
dalvik.system.PathClassLoader[/data/app/info.decamps.droid.photoid-1.apk]
at
dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
at
java.lang.ClassLoader.loadClass(ClassLoader.java:573)
at
java.lang.ClassLoader.loadClass(ClassLoader.java:532)
at
android.app.Instrumentation.newApplication(Instrumentation.java:945)
at
android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:660)
... 11 more
How an the Samsung Galaxy not find the application class?
Any clue on how to resolve this?
I have been able to reproduce tis crash on the Samsung Galaxy emulator.
I have removed the android:name attribute declaration from the AndroidManifest.xml and it now works.