SQLiteCantOpenDatabaseException：未知错误（代码 14）：无法打开数据库（仅在对应用程序进行单元测试时）

Question

所以我最近在我的应用程序中添加了持久性并且我得到了这个错误，有趣的部分是应用程序运行良好甚至持久化对象检索它们和所有但是当运行单元测试我得到错误写在上面。

以下是我的应用中有趣的部分

清单权限：

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission." />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_CONTACTS" />

这是 gradle 配置 defailtConfig 块

 compileSdkVersion 24
    buildToolsVersion '25.0.0'


    defaultConfig {
        applicationId "mehungry.com.myapplicationnavigationdawerdemo"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        minSdkVersion 22
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        multiDexEnabled = true

        jackOptions {
            enabled true
        }
    }

我的数据库助手：

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DatabaseHelper extends SQLiteOpenHelper {

    public static final int DATABASE_VERSION = 2;
    public static final String DATABASE_NAME = "MeHungryApp.db";

    private SQLiteDatabase database;

    private final Context context;

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

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CreateStatments.ATABLE);
        db.execSQL(CreateStatments.BTABLE);
        db.execSQL(CreateStatments.CTABLE);

        db.execSQL(CreateStatments.DTABLE);
        db.execSQL(CreateStatments.ETABLE);
        db.execSQL(CreateStatments.FTABLE);
        db.execSQL(CreateStatments.GTABLE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.w(DatabaseHelper.class.getName(),
                "Upgrading database from version " + oldVersion + " to "
                        + newVersion + ", which will destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS " + ATableDef.TABLE_NAME);
        db.execSQL("DROP TABLE IF EXISTS " + BTableDef.TABLE_NAME);
        db.execSQL("DROP TABLE IF EXISTS " + CTableDef.TABLE_NAME);
        db.execSQL("DROP TABLE IF EXISTS " + DTableDef.TABLE_NAME);
        db.execSQL("DROP TABLE IF EXISTS " + ETableDef.TABLE_NAME);
        db.execSQL("DROP TABLE IF EXISTS " + FTableDef.TABLE_NAME);
        db.execSQL("DROP TABLE IF EXISTS " + GTableDef.TABLE_NAME);

        onCreate(db);
    }

}

我的数据库测试class（暂时什么都不做）

@RunWith(AndroidJUnit4.class)
@LargeTest
public class MealEntityPersistenceTest {

private SQLiteDatabase database;
private DatabaseHelper databaseHelper;

public MealEntityPersistenceTest() {

}

@Before
public void setUp() {
    databaseHelper = new 
DatabaseHelper(InstrumentationRegistry.getContext());
    database = databaseHelper.getWritableDatabase();
}


@Test
public void testInsertRecipe() {
}


}

这是我在 Android 监视器

中的内容

    05-18 18:16:12.437 12672-12672/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0
05-18 18:16:12.438 12672-12695/? E/SQLiteLog: (14) cannot open file at line 30046 of [9491ba7d73]
05-18 18:16:12.439 12672-12695/? E/SQLiteLog: (14) os_unix.c:30046: (2) open(/data/data/mehungry.com.myapplicationnavigationdawerdemo.test/databases/MeHungryApp.db) - 
05-18 18:16:12.441 12672-12695/? E/SQLiteDatabase: Failed to open database '/data/data/mehungry.com.myapplicationnavigationdawerdemo.test/databases/MeHungryApp.db'.
   android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
   at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
   at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:218)
   at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:202)
   at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
   at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
   at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
   at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:806)
   at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:791)
   at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
   at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:1181)
   at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:223)
   at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
   at mehungry.MealEntityPersistenceTest.setUp(MealEntityPersistenceTest.java:37)
   at java.lang.reflect.Method.invoke(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:372)
   at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
   at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
   at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
   at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
   at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
   at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
   at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
   at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
   at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
   at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:58)
   at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
   at org.junit.runners.Suite.runChild(Suite.java:128)
   at org.junit.runners.Suite.runChild(Suite.java:27)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
   at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
   at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
   at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:58)
   at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
   at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
   at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
   at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59)
   at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262)
                                                       at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1853)
05-18 18:16:12.442 12672-12695/? I/TestRunner: failed: testInsertRecipe(mehungry.MealEntityPersistenceTest)
05-18 18:16:12.442 12672-12695/? I/TestRunner: ----- begin exception -----
05-18 18:16:12.443 12672-12695/? I/TestRunner: android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
   at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
   at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:218)
   at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:202)
   at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
   at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
   at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
   at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:806)
   at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:791)
   at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
   at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:1181)
   at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:223)
   at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
   at mehungry.MealEntityPersistenceTest.setUp(MealEntityPersistenceTest.java:37)
   at java.lang.reflect.Method.invoke(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:372)
   at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
   at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
   at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
   at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
   at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
   at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
   at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
   at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
   at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
   at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:58)
   at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
   at org.junit.runners.Suite.runChild(Suite.java:128)
   at org.junit.runners.Suite.runChild(Suite.java:27)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
   at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
   at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
   at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:58)
   at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
   at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
   at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
   at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59)
   at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262)
   at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1853)
05-18 18:16:12.443 12672-12695/? I/TestRunner: ----- end exception -----

我已经绝望了，因为我看到了很多类似的问题，但没有任何帮助，所以任何方向或大胆的猜测都将不胜感激。

Answer 1

所以经过一番调查，我发现问题出在数据库路径上

测试时：

/data/data/mehungry.com.myapplicationnavigationdawerdemo.test/databases/MeHungryApp.db

当运行整个应用程序时：

/data/data/mehungry.com.myapplicationnavigationdawerdemo/databases/MeHungryApp.db

这就是问题所在，这个不一致问题已为我解决当我确实更改了我的 DatabaseHelper 构造函数调用时

来自这个：

databaseHelper = new DatabaseHelper(InstrumentationRegistry.getContext());

对此：

databaseHelper = new DatabaseHelper(InstrumentationRegistry.getTargetContext());

希望它能在某个时候对某人有所帮助。

SQLiteCantOpenDatabaseException：未知错误（代码 14）：无法打开数据库（仅在对应用程序进行单元测试时）

SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database (Only when unit testing the app)

sqlite

android

unit-testing

android-testing

android-studio