클래스가 발견되지 않고 null 객체 참조 예외가 발생했습니다

Question

이제는 모든 스크립팅 및 디자인을 컴파일 시간 오류없이 완료했지만이 런타임 오류가 발생하고 앱이 깜박 거리고 시작되지 않습니다. 나는 그것이 요구하는 모든 파일을 가지고 모든 것이 지금 제안하십시오, 수행,

이

내 MainActivity.java 코드 그게 아마 이러한 예외

package com.example.dell.demologin; 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 

import java.util.HashMap; 

import activity.LoginActivity; 
import helper.SQLiteHandler; 
import helper.SessionManager; 

public class MainActivity extends Activity { 

private TextView txtName; 
private TextView txtEmail; 
private Button btnLogout; 
private SQLiteHandler db; 
private SessionManager session; 




@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_register); 


    txtName = (TextView) findViewById(R.id.name); 
    txtEmail = (TextView) findViewById(R.id.email); 
    btnLogout = (Button) findViewById(R.id.btnLogout); 

    // SqLite database handler 
    db = new SQLiteHandler(getApplicationContext()); 

    // session manager 
    session = new SessionManager(getApplicationContext()); 

    if (!session.isLoggedIn()) { 
     logoutUser(); 
    } 

    // Fetching user details from sqlite 
    HashMap<String, String> user = db.getUserDetails(); 

    String name = user.get("name"); 
    String email = user.get("email"); 

    // Displaying the user details on the screen 
    txtName.setText(name); 
    txtEmail.setText(email); 

    // Logout button click event 
    btnLogout.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      logoutUser(); 
     } 
    }); 
} 

/** 
* Logging out the user. Will set isLoggedIn flag to false in shared 
* preferences Clears the user data from sqlite users table 
* */ 
private void logoutUser() { 
    session.setLogin(false); 

    db.deleteUsers(); 

    // Launching the login activity 
    Intent intent = new Intent(MainActivity.this, LoginActivity.class); 
    startActivity(intent); 
    finish(); 
} 

} 

이 을 던지고있다 내 logcat입니다.

,210

E/AndroidRuntime: FATAL EXCEPTION: main 
    Process: com.example.dell.demologin, PID: 15578 
    java.lang.RuntimeException: Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication: java.lang.IllegalStateException: java.lang.ClassNotFoundException: com.example.dell.demologin.AppController 
     at android.app.LoadedApk.makeApplication(LoadedApk.java:601) 
     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4757) 
     at android.app.ActivityThread.access$1600(ActivityThread.java:159) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1445) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:152) 
     at android.app.ActivityThread.main(ActivityThread.java:5507) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
    Caused by: java.lang.IllegalStateException: java.lang.ClassNotFoundException: com.example.dell.demologin.AppController 
     at com.android.tools.fd.runtime.BootstrapApplication.createRealApplication(BootstrapApplication.java:220) 
     at com.android.tools.fd.runtime.BootstrapApplication.attachBaseContext(BootstrapApplication.java:239) 
     at android.app.Application.attach(Application.java:187) 
     at android.app.Instrumentation.newApplication(Instrumentation.java:1001) 
     at android.app.Instrumentation.newApplication(Instrumentation.java:985) 
     at android.app.LoadedApk.makeApplication(LoadedApk.java:586) 
     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4757)  
     at android.app.ActivityThread.access$1600(ActivityThread.java:159)  
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1445)  
     at android.os.Handler.dispatchMessage(Handler.java:102)  
     at android.os.Looper.loop(Looper.java:152)  
     at android.app.ActivityThread.main(ActivityThread.java:5507)  
     at java.lang.reflect.Method.invoke(Native Method)  
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  
    Caused by: java.lang.ClassNotFoundException: com.example.dell.demologin.AppController 
     at java.lang.Class.classForName(Native Method) 
     at java.lang.Class.forName(Class.java:324) 
     at java.lang.Class.forName(Class.java:285) 
     at com.android.tools.fd.runtime.BootstrapApplication.createRealApplication(BootstrapApplication.java:209) 
     at com.android.tools.fd.runtime.BootstrapApplication.attachBaseContext(BootstrapApplication.java:239)  
     at android.app.Application.attach(Application.java:187)  
     at android.app.Instrumentation.newApplication(Instrumentation.java:1001)  
     at android.app.Instrumentation.newApplication(Instrumentation.java:985)  
     at android.app.LoadedApk.makeApplication(LoadedApk.java:586)  
     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4757)  
     at android.app.ActivityThread.access$1600(ActivityThread.java:159)  
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1445)  
     at android.os.Handler.dispatchMessage(Handler.java:102)  
     at android.os.Looper.loop(Looper.java:152)  
     at android.app.ActivityThread.main(ActivityThread.java:5507)  
     at java.lang.reflect.Method.invoke(Native Method)  
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  
    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.dell.demologin.AppController" on path: DexPathList[[zip file "/data/app/com.example.dell.demologin-2/base.apk"],nativeLibraryDirectories=[/data/app/com.example.dell.demologin-2/lib/arm64, /vendor/lib64, /system/lib64]] 
     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
     at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
     at java.lang.ClassLoader.loadClass(ClassLoader.java:469) 
     at java.lang.Class.classForName(Native Method)  
     at java.lang.Class.forName(Class.java:324)  
     at java.lang.Class.forName(Class.java:285)  
     at com.android.tools.fd.runtime.BootstrapApplication.createRealApplication(BootstrapApplication.java:209)  
     at com.android.tools.fd.runtime.BootstrapApplication.attachBaseContext(BootstrapApplication.java:239)  
     at android.app.Application.attach(Application.java:187)  
     at android.app.Instrumentation.newApplication(Instrumentation.java:1001)  
     at android.app.Instrumentation.newApplication(Instrumentation.java:985)  
     at android.app.LoadedApk.makeApplication(LoadedApk.java:586)  
     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4757)  
     at android.app.ActivityThread.access$1600(ActivityThread.java:159)  
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1445)  
     at android.os.Handler.dispatchMessage(Handler.java:102)  
     at android.os.Looper.loop(Looper.java:152)  
     at android.app.ActivityThread.main(ActivityThread.java:5507)  
     at java.lang.reflect.Method.invoke(Native Method)  
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  
    Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.example.dell.demologin.AppController" on path: DexPathList[[dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-support-annotations-23.4.0_2f85958e3577c0887206665b958d529f2917b10d-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_9-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_8-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_7-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_6-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_5-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_4-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_3-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_2-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_1-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-slice_0-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-mysql-connector-java_910883ba1d0637ad761451367a22e76261a44141-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-jtds_dd6bef0a517729fc55f6897f784dfc3379233a03-classes.dex", dex file "/data/data/com.example.dell.demologin/files/instant-run/dex/slice-internal_impl-23.4.0_acbefc0422230ccc1164ab 
E/AndroidRuntime: Error reporting crash 
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.app.Application.getApplicationContext()' on a null object reference 
     at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:96) 
     at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693) 
     at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690) 
I/Process: Sending signal. PID: 15578 SIG: 9 
Application terminated. 

Google Play 스토어 업그레이드 과정에서

Answer 1

알려진 버그, https://code.google.com/p/android/issues/detail?id=56296