由于ClassNotFoundException而无法启动活动

时间：2014-11-02 17:25:54

标签： java android android-intent noclassdeffounderror

我正在尝试使用代码启动新活动：

Intent i = new Intent(this, TempLobbyActivity.class);
startActivity(i);
finish();

当我启动此代码时，我在执行Intent构造函数时会遇到以下异常。

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

我确保TempLobbyActivity类确实存在并且是一个适当的活动。我没有其他错误。

这是TempLobbyActivity的开始：

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 {

这是我的清单文件：

<?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>

5 个答案:

答案 0 :(得分：13)

即使在AndroidManifest.xml中定义了类，我也遇到了同样的错误。

原因：有时会在添加多个版本的appcompat库时发生这种情况。

解决方案：删除以前版本的appcompat lib并将appcompat_v7.jar添加到/ lib文件夹。

清理您的项目并重新构建。您可能不会再次收到错误。

答案 1 :(得分：0)

在AndroidManifest.xml注册TempLobbyActivity 

<activity android:name="TempLobbyActivity"></activity>

所以你的清单文件应该是这样的

<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>
<activity android:name="TempLobbyActivity"></activity>

答案 2 :(得分：0)

自11月21日以来，API级别10（Android 2.3.3 - 2.3.7）存在一个错误（可能在Play服务库中）：

请参阅此错误报告 https://code.google.com/p/android/issues/detail?id=81083

答案 3 :(得分：0)

对于那些可能仍然面临这个问题的人：

为build.gradle添加适当的依赖项，如果没有正确添加依赖项并且gradle没有编译添加到项目中的库，则会发生此类错误，因此您不会在运行时访问这些库类。

答案 4 :(得分：0)

我发现控制台中出现了一个我忽略的错误：

  

[ExoPlayerLib]找不到ExoPlayerLib.apk。

使用SO answer解决此问题，NoClassDefFoundError的次要错误也已解决。

看起来，在项目中构建和包含库的任何问题都可能导致此问题。

相关问题
最新问题