Failing to launch activity due to ClassNotFoundException
30,772
I was getting the same error even though class was defined in AndroidManifest.xml.
Cause : Sometimes this happens as you add more than one version of appcompat library.
Solution : Remove any previous version of appcompat lib and add appcompat_v7.jar to your /lib folder.
Clean your project and build again. You might not get error again.
Author by
Eric Siegal
Updated on July 22, 2022Comments
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Eric Siegal almost 2 years
I am trying to launch a new activity using the code:
Intent i = new Intent(this, TempLobbyActivity.class); startActivity(i); finish();
When I launch this code I get the following exceptions when executing the Intent constructor.
FATAL EXCEPTION: main Process: com.edr.iveflownthat, PID: 1457 java.lang.NoClassDefFoundError: Failed resolution of: Lcom/edr/iveflownthat/TempLobbyActivity; at com.edr.iveflownthat.pages.MainActivity.tryAutoLogin(MainActivity.java:46) at com.edr.iveflownthat.pages.MainActivity.onCreate(MainActivity.java:22) at android.app.Activity.performCreate(Activity.java:5933) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5221) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.edr.iveflownthat.TempLobbyActivity" on path: DexPathList[[zip file "/data/app/com.edr.iveflownthat-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]] FATAL EXCEPTION: main Process: com.edr.iveflownthat, PID: 1457 java.lang.NoClassDefFoundError: Failed resolution of: Lcom/edr/iveflownthat/TempLobbyActivity; at com.edr.iveflownthat.pages.MainActivity.tryAutoLogin(MainActivity.java:46) at com.edr.iveflownthat.pages.MainActivity.onCreate(MainActivity.java:22) at android.app.Activity.performCreate(Activity.java:5933) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5221) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.edr.iveflownthat.TempLobbyActivity" on path: DexPathList[[zip file "/data/app/com.edr.iveflownthat-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass(ClassLoader.java:511) at java.lang.ClassLoader.loadClass(ClassLoader.java:469) ... 15 more Suppressed: java.lang.NoClassDefFoundError: com.edr.iveflownthat.TempLobbyActivity at dalvik.system.DexFile.defineClassNative(Native Method) at dalvik.system.DexFile.defineClass(DexFile.java:222) at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:215) at dalvik.system.DexPathList.findClass(DexPathList.java:321) at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54) ... 17 more Suppressed: java.lang.ClassNotFoundException: com.edr.iveflownthat.TempLobbyActivity at java.lang.Class.classForName(Native Method) at java.lang.BootClassLoader.findClass(ClassLoader.java:781) at java.lang.BootClassLoader.loadClass(ClassLoader.java:841) at java.lang.ClassLoader.loadClass(ClassLoader.java:504) ... 16 more Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass(ClassLoader.java:511) at java.lang.ClassLoader.loadClass(ClassLoader.java:469) ... 15 more Suppressed: java.lang.NoClassDefFoundError: com.edr.iveflownthat.TempLobbyActivity at dalvik.system.DexFile.defineClassNative(Native Method) at dalvik.system.DexFile.defineClass(DexFile.java:222) at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:215) at dalvik.system.DexPathList.findClass(DexPathList.java:321) at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54) ... 17 more Suppressed: java.lang.ClassNotFoundException: com.edr.iveflownthat.TempLobbyActivity at java.lang.Class.classForName(Native Method) at java.lang.BootClassLoader.findClass(ClassLoader.java:781) at java.lang.BootClassLoader.loadClass(ClassLoader.java:841) at java.lang.ClassLoader.loadClass(ClassLoader.java:504) ... 16 more Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
I have made sure that the class TempLobbyActivity does exist and is a proper activity. I get no other errors.
Here is the begining of TempLobbyActivity:
package com.edr.iveflownthat; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; import com.edr.iveflownthat.pages.fragments.LobbyLeaderboardFragment; import com.edr.iveflownthat.pages.fragments.LobbyMessagerFragment; import com.edr.iveflownthat.pages.fragments.LobbyMyPlanesFragment; public class TempLobbyActivity extends FragmentActivity {
And here is my manifest file:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.edr.iveflownthat" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="19" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.GET_ACCOUNTS" /> <uses-permission android:name="android.permission.USE_CREDENTIALS" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <application android:allowBackup="true" android:icon="@drawable/app_logo" 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" /> <activity android:name=".pages.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=".StartActivity" android:label="@string/title_activity_start" > </activity> <activity android:name=".pages.AccountLoginActivity" android:label="@string/title_activity_login" > </activity> <activity android:name=".pages.MyPlanesActivity" android:label="@string/title_activity_my_planes" > </activity> <activity android:name="com.edr.icom.edr.iveflownthat.activities.AccountNewActivity" android:label="@string/title_activity_new_account" > </activity> <activity android:name=".pages.SearchPlanesActivity" android:label="@string/title_activity_search" android:parentActivityName=".pages.LobbyActivity" > <meta-data android:name="android.support.PARENT_ACTIVITY" android:value="com.edr.iveflownthat.pages.LobbyActivity" /> </activity> <activity android:name=".pages.LeaderBoardActivity" android:label="@string/title_activity_leader_board" > </activity> <activity android:name=".pages.PlaneBioActivity" android:label="@string/title_activity_plane_info" > </activity> <activity android:name=".pages.AccountLoginFacebookActivity" android:label="@string/title_activity_account_login_facebook" > </activity> <activity android:name=".pages.AccountLoginGoogleActivity" android:label="@string/title_activity_account_login_google" > </activity> <activity android:name=".pages.AccountLoginTwitterActivity" android:label="@string/title_activity_account_login_twitter" > </activity> <activity android:name=".pages.SettingsActivity" android:label="@string/title_activity_settings" > </activity> <activity android:name=".pages.MainTabActivity" android:label="@string/title_activity_main_tab" > </activity> <activity android:name=".pages.LobbyActivity" android:label="@string/title_activity_lobby" > </activity> <activity android:name=".pages.MessageStreamActivity" android:label="@string/title_activity_message_stream" android:parentActivityName=".pages.LobbyActivity" > <meta-data android:name="android.support.PARENT_ACTIVITY" android:value="com.edr.iveflownthat.pages.LobbyActivity" /> </activity> <activity android:name=".pages.LeaderboardActivity" android:label="@string/title_activity_leaderboard" android:parentActivityName=".pages.LobbyActivity" > <meta-data android:name="android.support.PARENT_ACTIVITY" android:value="com.edr.iveflownthat.pages.LobbyActivity" /> </activity> <service android:name=".services.MainService" android:exported="false" /> <activity android:name=".pages.NewMessageActivity" android:label="@string/title_activity_new_message" > </activity> <activity android:name=".pages.PlaneActivity" android:label="@string/title_activity_plane" > </activity> <!-- <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/app_id" /> <activity android:name="com.facebook.LoginActivity" android:label="@string/app_name" > </activity> --> <activity android:name=".TempLobbyActivity" android:label="@string/title_activity_temp_lobby" > </activity> </application> </manifest>
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Chris Stratton over 9 yearsI suspect this is not the problem. But what you have posted won't quite work - you must either specify the package name or lead with a "." as for MainActivity.
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VJ Vélan Solutions over 9 years@Reinaldo - edit your answer per Chris Stratton suggestion and i will upvote ur answer :)