我正在按照this建议的指南创建一个带有预加载数据的SQLite数据库;但是我无法理解如何生成所需的数据库文件（.db）。
我使用了“DB Browser for SQLite”软件来编写我的数据库，但似乎只能将文件保存为创建数据库的命令（CREATE TABLE IF NOT EXISTS等。）。
如何将文件保存为所需的.db格式？
This网站的解决方案是我认为我的文件格式错误的原因。
对于上下文，我遇到的错误如下：
09-02 23:47:58.681 19704-19704/company.app W/SQLiteAssetHelper: copying database from assets...
09-02 23:47:58.682 19704-19704/company.app W/SQLiteAssetHelper: database copy complete
09-02 23:47:58.684 19704-19704/company.app E/SQLiteLog: (26) file is encrypted or is not a database
09-02 23:47:58.684 19704-19704/company.app E/DefaultDatabaseErrorHandler: Corruption reported by sqlite on database: /data/user/0/company.app /databases/app .db
09-02 23:47:58.684 19704-19704/company.app E/DefaultDatabaseErrorHandler: deleting the database file: /data/user/0/company.app /databases/app .db
09-02 23:47:58.686 19704-19704/company.app E/SQLiteLog: (14) cannot open file at line 32504 of [bda77dda96]
09-02 23:47:58.686 19704-19704/company.app E/SQLiteLog: (14) os_unix.c:32504: (2) open(/data/user/0/company.app /databases/app .db) -
09-02 23:47:58.687 19704-19704/company.app E/SQLiteDatabase: Failed to open database '/data/user/0/company.app /databases/app .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:209)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
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:808)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:796)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:696)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:671)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.returnDatabase(SQLiteAssetHelper.java:408)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.createOrOpenDatabase(SQLiteAssetHelper.java:401)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getWritableDatabase(SQLiteAssetHelper.java:176)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getReadableDatabase(SQLiteAssetHelper.java:254)
at company.app .MyDatabase.randomiseItBro(MyDatabase.java:33)
at company.app .MainActivity.randomise(MainActivity.java:55)
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4695)
at android.view.View.performClick(View.java:5612)
at android.view.View$PerformClick.run(View.java:22285)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
09-02 23:47:58.688 19704-19704/company.app W/SQLiteAssetHelper: could not open database app .db - unknown error (code 14): Could not open database
09-02 23:47:58.689 19704-19704/company.app D/AndroidRuntime: Shutting down VM
09-02 23:47:58.689 19704-19704/company.app E/AndroidRuntime: FATAL EXCEPTION: main
Process: company.app , PID: 19704
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.view.View$DeclaredOnClickListener.onClick(View.java:4700)
at android.view.View.performClick(View.java:5612)
at android.view.View$PerformClick.run(View.java:22285)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4695)
at android.view.View.performClick(View.java:5612)
at android.view.View$PerformClick.run(View.java:22285)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.database.sqlite.SQLiteDatabase.getVersion()' on a null object reference
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getWritableDatabase(SQLiteAssetHelper.java:178)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getReadableDatabase(SQLiteAssetHelper.java:254)
at company.app .MyDatabase.randomiseItBro(MyDatabase.java:33)
at company.app .MainActivity.randomise(MainActivity.java:55)
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4695)
at android.view.View.performClick(View.java:5612)
at android.view.View$PerformClick.run(View.java:22285)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
答案 0 :(得分：1)
单击“新建数据库”工具栏按钮时，将创建SQLite数据库文件。创建表和内容时，单击“写入更改”工具栏按钮，即可更新该数据库文件。获得所需数据库文件后，即assets/中包含的文件，供SQLiteAssetHelper使用。
对于SQLite的DB Browser的Linux版本默认情况下不会将文件扩展名应用于该文件。您需要在创建数据库文件时自己添加.db，或在创建数据库文件后重命名它。
答案 1 :(得分：0)
您可以像myfunc.js文件或index.html一样创建一个文件，但这个文件是带代码的mydb.sql。常规word文件ex：
CREATE DATABASE activedb;
CREATE TABLE table_name (
column1 datatype,
column2 datatype,
column3 datatype,
....
);
然后你可以使用database_name < mydb.sql
我认为这就是你想要做的。我不确定。
答案 2 :(得分：0)
如果您在应用程序中正确地将数据库从资产转移到数据库目录，那么您可能会错过以下两个要求之一：
_id CREATE TABLE android_metadata (_id INTEGER PRIMARY KEY, locale TEXT)