No Launcher Найденная деятельность! in android

Question

У меня есть приложение для Android, в котором я использую настройки Google Maps в файле manifest.xml. Когда я запустить приложение в затмении выхода был ниже

[2015-02-25 17:59:06 - MainActivity] ------------------------------ 
[2015-02-25 17:59:06 - MainActivity] Android Launch! 
[2015-02-25 17:59:06 - MainActivity] adb is running normally. 
[2015-02-25 17:59:06 - MainActivity] No Launcher activity found! 
[2015-02-25 17:59:06 - MainActivity] The launch will only sync the application package on the device! 
[2015-02-25 17:59:06 - MainActivity] Performing sync 
[2015-02-25 17:59:06 - MainActivity] Automatic Target Mode: using existing emulator 'emulator-5554' running compatible AVD 'Nexus7' 
[2015-02-25 17:59:06 - MainActivity] Uploading MainActivity.apk onto device 'emulator-5554' 
[2015-02-25 17:59:07 - MainActivity] Installing MainActivity.apk... 
[2015-02-25 17:59:19 - MainActivity] Success! 
[2015-02-25 17:59:19 - appcompat_v7] Could not find appcompat_v7.apk! 
[2015-02-25 17:59:19 - MainActivity] /MainActivity/bin/MainActivity.apk installed on device 
[2015-02-25 17:59:19 - MainActivity] Done! 

было установлено приложение на эмуляторе (Android 4.2.2, уровень API 19), но когда я попытался ее открыть разрушилось, говоря Unfortunately your app was closed и я нашел ошибку ниже в LogCat

02-25 07:37:30.540: E/AndroidRuntime(2194): FATAL EXCEPTION: main 
02-25 07:37:30.540: E/AndroidRuntime(2194): Process: com.example.project, PID: 2194 
02-25 07:37:30.540: E/AndroidRuntime(2194): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.project/com.example.project.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.example.project.MainActivity" on path: DexPathList[[zip file "/system/framework/com.google.android.maps.jar", zip file "/data/app/com.example.project-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.project-1, /vendor/lib, /system/lib]] 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.app.ActivityThread.access$800(ActivityThread.java:135) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.os.Handler.dispatchMessage(Handler.java:102) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.os.Looper.loop(Looper.java:136) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at java.lang.reflect.Method.invoke(Method.java:515) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at dalvik.system.NativeStart.main(Native Method) 
02-25 07:37:30.540: E/AndroidRuntime(2194): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.project.MainActivity" on path: DexPathList[[zip file "/system/framework/com.google.android.maps.jar", zip file "/data/app/com.example.project-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.project-1, /vendor/lib, /system/lib]] 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at java.lang.ClassLoader.loadClass(ClassLoader.java:497) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at java.lang.ClassLoader.loadClass(ClassLoader.java:457) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.app.Instrumentation.newActivity(Instrumentation.java:1061) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112) 
02-25 07:37:30.540: E/AndroidRuntime(2194):  ... 11 more 
02-25 07:37:36.350: I/Process(2194): Sending signal. PID: 2194 SIG: 9 

ниже приведены кодовые файлы

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
      package="com.example.project" 
      android:versionCode="12" 
      android:versionName="1.1.9"> 
    <uses-sdk android:minSdkVersion="16"/> 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" /> 
    <uses-permission android:name="com.example.project.permission.C2D_MESSAGE" /> 
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher" android:theme="@style/LightTheme"> 
     <meta-data android:name="com.google.android.gms.version" android:value="5077000" /> 
     <uses-library android:name="com.google.android.maps" /> 
     <meta-data 
       android:name="com.google.android.maps.v2.API_KEY" 
       android:value="xxxxxxxxxxxxxxxxxxxxxx" /> 
     <receiver android:name="com.example.project.MessageReceiver" android:exported="true" 
        android:permission="com.google.android.c2dm.permission.SEND" > 
      <intent-filter> 
       <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
       <category android:name="com.example.project" /> 
      </intent-filter> 
     </receiver> 
     <activity android:name="MainActivity" 
        android:label="@string/app_name" 
        android:screenOrientation="portrait"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN"/> 
       <category android:name="android.intent.category.LAUNCHER"/> 
       <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> 
       <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
      </intent-filter> 
     </activity> 
    </application> 
</manifest> 

MainActivity.java

package com.example.project; 


import android.app.* 
....... 

public class MainActivity extends FragmentActivity implements ActionBar.TabListener { 
    SwipeFragmentAdapter mAppSectionsPagerAdapter; 
    ViewPager mViewPager; 

    .... 
    .... 

    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); 
     setContentView(R.layout.main); 

     mAppSectionsPagerAdapter = new SwipeFragmentAdapter(getSupportFragmentManager()); 
     mAppSectionsPagerAdapter.delegate = this; 
     credentials = this.getPreferences(Context.MODE_PRIVATE); 
     if (credentials.getString("email", null) == null || credentials.getString("group", null) == null) { 
      userValid(false); 
     } else { 
      validateUser(); 
     } 
    } 

    ....... 
    ....... 

main.xml

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android" 
            android:id="@+id/pager" 
            android:layout_width="match_parent" 
            android:layout_height="match_parent"/> 

Так из вышесказанного я считаю, что все настроено правильно, но почему я все еще получаю класс MainActivity не найден?

Answer 1

изменить это один, как:

<activity android:name="MainActivity" 
        android:label="@string/app_name" 
        android:screenOrientation="portrait"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN"/> 
       <category android:name="android.intent.category.LAUNCHER"/> 
       <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> 
       <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
      </intent-filter> 
     </activity> 

в

<activity android:name="com.example.project.MainActivity" 
        android:label="@string/app_name" 
        android:screenOrientation="portrait"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN"/> 
       <category android:name="android.intent.category.LAUNCHER"/> 
       <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> 
       <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
      </intent-filter> 
     </activity> 

только отметить, что деятельность наряду с именем пакета

Answer 2

Просто добавьте точку перед именем активности, т.е. изменения в .MainActivity вместо из-за того, что андроид не может найти его после привязки к имени пакета.

<activity android:name=".MainActivity" 
        android:label="@string/app_name" 
        android:screenOrientation="portrait"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN"/> 
       <category android:name="android.intent.category.LAUNCHER"/> 
       <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> 
       <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
      </intent-filter> 
     </activity> 

Answer 3

<activity android:name="com.example.project.MainActivity" 
       android:label="@string/app_name" 
       android:screenOrientation="portrait"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN"/> 
      <category android:name="android.intent.category.LAUNCHER"/> 
      <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> 
      <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
     </intent-filter> 
    </activity> 

изменить этот тег, как описано выше