Получение ClassNotFoundException при создании пользовательского ContentProvider

Question

Я создаю приложение Android в Android Studio, которое реализует пользовательский ContentProvider. По какой-то причине, когда я иду, чтобы скомпилировать приложение и проверить его на эмуляторе, я получаю сообщение об ошибке:

11-17 21:12:29.918 1381-1381/com.aiorsoft.encryptic E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    java.lang.RuntimeException: Unable to get provider com.aiorsoft.encryptic.providers.AccountProvider: java.lang.ClassNotFoundException: Didn't find class "com.aiorsoft.encryptic.providers.AccountProvider" on path: DexPathList[[zip file "/data/app/com.aiorsoft.encryptic-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.aiorsoft.encryptic-2, /system/lib]] 
      at android.app.ActivityThread.installProvider(ActivityThread.java:4882) 
      at android.app.ActivityThread.installContentProviders(ActivityThread.java:4485) 
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4425) 
      at android.app.ActivityThread.access$1300(ActivityThread.java:141) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.app.ActivityThread.main(ActivityThread.java:5103) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:525) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
      at dalvik.system.NativeStart.main(Native Method) 
    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.aiorsoft.encryptic.providers.AccountProvider" on path: DexPathList[[zip file "/data/app/com.aiorsoft.encryptic-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.aiorsoft.encryptic-2, /system/lib]] 
      at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53) 
      at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 
      at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
      at android.app.ActivityThread.installProvider(ActivityThread.java:4867) 
            at android.app.ActivityThread.installContentProviders(ActivityThread.java:4485) 
            at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4425) 
            at android.app.ActivityThread.access$1300(ActivityThread.java:141) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316) 
            at android.os.Handler.dispatchMessage(Handler.java:99) 
            at android.os.Looper.loop(Looper.java:137) 
            at android.app.ActivityThread.main(ActivityThread.java:5103) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:525) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
            at dalvik.system.NativeStart.main(Native Method) 

я сделал немного фона исследований, но до сих пор найти решение моей проблемы. Я не использую ProGuard в этом проекте, чтобы исключить все, что не поддерживается этой службой. Может ли кто-нибудь помочь мне решить эту проблему? Возможно, мне не хватает чего-то, что очевидно, и я смотрю прямо в лицо, но я не могу его найти. Спасибо за любую помощь! Я включил соответствующие файлы ниже.

Вот мой манифест:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.aiorsoft.encryptic" 
    android:installLocation="preferExternal" 
    android:versionCode="1" 
    android:versionName="1.0"> 

    <uses-sdk 
     android:minSdkVersion="15" 
     android:targetSdkVersion="18" /> 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/title_app_name" 
     android:theme="@style/Theme.Encryptic"> 
     <activity android:name=".activities.MainActivity"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 

     <service android:name=".services.ConnectionService" 
      android:exported="false" /> 

     <provider 
      android:name=".providers.AccountProvider" 
      android:authorities=".providers" /> 
    </application> 
</manifest> 

И сам провайдер:

package com.aiorsoft.encryptic.providers; 

import android.content.ContentProvider; 
import android.content.ContentValues; 
import android.content.Context; 
import android.content.UriMatcher; 
import android.database.Cursor; 
import android.database.SQLException; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.net.Uri; 
import android.provider.BaseColumns; 
import android.text.TextUtils; 

public class AccountProvider extends ContentProvider { 
    private static final String AUTHORITY = "com.aiorsoft.encryptic.providers"; 
    private static final String DATABASE_NAME = "accounts"; 
    public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/" + DATABASE_NAME); 
    private static final int DATABASE_VERSION = 1; 

    private static final String TABLE_ACCOUNTS = "Account"; 
    private static final int ACCOUNTS_ALL = 1; 
    private static final int ACCOUNTS_SINGLE = 2; 

    private interface AccountColumns extends BaseColumns { 
     public static final String _ID = BaseColumns._ID; 
     public static final String USERNAME = "username"; 
     public static final String EMAIL = "email"; 
     public static final String TOKEN = "token"; 
    } 
    private static final String[] ALL_COLUMNS = new String[] { 
      AccountColumns._ID, AccountColumns.USERNAME, AccountColumns.EMAIL, AccountColumns.TOKEN 
    }; 

    private static final String CREATE_SQL = "CREATE TABLE " 
      + TABLE_ACCOUNTS + " (" 
      + AccountColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " 
      + AccountColumns.USERNAME + " TEXT NOT NULL, " 
      + AccountColumns.EMAIL + " TEXT, " 
      + AccountColumns.TOKEN + " TEXT);"; 
    private static final String USERNAME_INDEX_SQL = "CREATE INDEX " 
      + AccountColumns.USERNAME + "_idx ON " + TABLE_ACCOUNTS + " (" 
      + AccountColumns.USERNAME + " ASC);"; 

    private static UriMatcher uriMatcher; 
    private DatabaseHelper dbHelper; 

    static { 
     uriMatcher = new UriMatcher(UriMatcher.NO_MATCH); 
     uriMatcher.addURI(AUTHORITY, DATABASE_NAME, ACCOUNTS_ALL); 
     uriMatcher.addURI(AUTHORITY, DATABASE_NAME + "/#", ACCOUNTS_SINGLE); 
    } 

    @Override 
    public boolean onCreate() { 
     dbHelper = new DatabaseHelper(getContext()); 
     return true; 
    } 

    @Override 
    public String getType(Uri uri) { 
     switch (uriMatcher.match(uri)) { 
      case ACCOUNTS_ALL: 
       return "vnd.android.cursor.dir/vnd." + AUTHORITY + "." + DATABASE_NAME; 

      case ACCOUNTS_SINGLE: 
       return "vdn.android.cursor.item/vnd." + AUTHORITY + "." + DATABASE_NAME; 

      default: 
       return null; 
     } 
    } 

    @Override 
    public Uri insert(Uri uri, ContentValues values) { 
     Uri result = doInsert(uri, values, dbHelper.getWritableDatabase()); 
     return result; 
    } 

    @Override 
    public int bulkInsert(Uri uri, ContentValues[] values) { 
     SQLiteDatabase db = dbHelper.getWritableDatabase(); 
     int count = 0; 

     try { 
      db.beginTransaction(); 

      for (ContentValues value : values) { 
       Uri resultUri = doInsert(uri, value, db); 
       if (resultUri != null) { 
        count++; 
       } else { 
        count = 0; 
        throw new SQLException("Error in bulk insert"); 
       } 
      } 

      db.setTransactionSuccessful(); 
     } finally { 
      db.endTransaction(); 
     } 

     db.close(); 
     return count; 
    } 

    @Override 
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, 
         String sortOrder) { 
     SQLiteDatabase db = dbHelper.getReadableDatabase(); 
     Cursor query; 

     // Fix the projection 
     if (projection == null) { 
      projection = ALL_COLUMNS; 
     } 

     // Fix sort order 
     if (sortOrder == null) { 
      sortOrder = AccountColumns._ID; 
     } 

     switch (uriMatcher.match(uri)) { 
      case ACCOUNTS_ALL: 
       query = db.query(TABLE_ACCOUNTS, projection, selection, selectionArgs, null, null, sortOrder); 

       db.close(); 
       return query; 

      case ACCOUNTS_SINGLE: 
       String accountId = uri.getLastPathSegment(); 
       selection = fixSelectionString(selection); 
       selectionArgs = fixSelectionArgs(selectionArgs, accountId); 
       query = db.query(TABLE_ACCOUNTS, projection, selection, selectionArgs, null, null, sortOrder); 

       db.close(); 
       return query; 

      default: 
       throw new IllegalArgumentException("Invalid uri: " + uri); 
     } 
    } 

    @Override 
    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { 
     getContext().getContentResolver().notifyChange(uri, null); 

     SQLiteDatabase db = dbHelper.getWritableDatabase(); 
     int rowsAffected; 

     switch (uriMatcher.match(uri)) { 
      case ACCOUNTS_ALL: 
       rowsAffected = db.update(TABLE_ACCOUNTS, values, selection, selectionArgs); 
       break; 

      case ACCOUNTS_SINGLE: 
       String accountId = uri.getLastPathSegment(); 
       selection = fixSelectionString(selection); 
       selectionArgs = fixSelectionArgs(selectionArgs, accountId); 

       rowsAffected = db.update(TABLE_ACCOUNTS, values, selection, selectionArgs); 
       break; 

      default: 
       throw new IllegalArgumentException("Illegal URI: " + uri); 
     } 

     getContext().getContentResolver().notifyChange(uri, null); 
     return rowsAffected; 
    } 

    @Override 
    public int delete(Uri uri, String selection, String[] selectionArgs) { 
     SQLiteDatabase db = dbHelper.getWritableDatabase(); 
     int rowsAffected; 

     switch (uriMatcher.match(uri)) { 
      case ACCOUNTS_ALL: 
       rowsAffected = db.delete(TABLE_ACCOUNTS, selection, selectionArgs); 
       break; 

      case ACCOUNTS_SINGLE: 
       String accountId = uri.getLastPathSegment(); 
       selection = fixSelectionString(selection); 
       selectionArgs = fixSelectionArgs(selectionArgs, accountId); 

       rowsAffected = db.delete(TABLE_ACCOUNTS, selection, selectionArgs); 
       break; 

      default: 
       throw new IllegalArgumentException("Illegal URI: " + uri); 
     } 

     return rowsAffected; 
    } 

    private String[] fixSelectionArgs(String[] selectionArgs, String accountId) { 
     String[] newSelectionArgs; 

     if (selectionArgs == null) { 
      newSelectionArgs = new String[] {accountId}; 
     } else { 
      newSelectionArgs = new String[selectionArgs.length + 1]; 
      newSelectionArgs[0] = accountId; 
      System.arraycopy(selectionArgs, 0, newSelectionArgs, 1, selectionArgs.length); 
     } 

     return newSelectionArgs; 
    } 

    private String fixSelectionString(String selection) { 
     if (selection == null) { 
      selection = AccountColumns._ID + " = ?"; 
     } else { 
      selection = AccountColumns._ID + " = ? AND (" + selection + ")"; 
     } 

     return selection; 
    } 

    private Uri doInsert(Uri uri, ContentValues values, SQLiteDatabase db) { 
     Uri result = null; 

     switch (uriMatcher.match(uri)) { 
      case ACCOUNTS_ALL: 
       long id = db.insert(TABLE_ACCOUNTS, "", values); 
       if (id == -1) { 
        throw new SQLException("Error inserting data"); 
       } 

       result = Uri.withAppendedPath(uri, String.valueOf(id)); 
       break; 
     } 

     db.close(); 
     return result; 
    } 

    public class DatabaseHelper extends SQLiteOpenHelper { 

     public DatabaseHelper(Context context) { 
      super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     } 

     @Override 
     public void onCreate(SQLiteDatabase db) { 
      db.execSQL(CREATE_SQL); 
      db.execSQL(USERNAME_INDEX_SQL); 
     } 

     @Override 
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 

     } 
    } 
} 

Answer 1

Ну это было глупо ... Видимо, в настройках Android студии, SDK, который я использовал WASN» т, поэтому я должен был это исправить. Все работает сейчас!