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在我的应用程序中，我通过复制保存在资产文件夹中的现有 sqlite 数据库来创建数据库。

在代码中，我还检查了数据库版本，因此如果安装了更高版本的应用程序，则重新创建数据库（在 onUpgrade 方法中）。

我遇到的问题是，升级过程在以前的 Android 版本上运行良好，但自从安装 Jelly Bean 后，我一直收到数据库损坏的错误。如果我干净地安装应用程序（所以没有数据库升级，只需创建），那么应用程序也可以正常运行。

我测试过的两台设备是带有 4.1.1 的 S3 和带有 4.2.1 的 Nexus 4。

任何想法为什么它会在最新的 Android 版本上开始失败？谢谢！

错误如下：

01-09 09:59:50.941: E/SQLiteLog(15915): (11) database corruption at line 51776 of [00bb9c9ce4]
01-09 09:59:50.941: E/SQLiteLog(15915): (11) database disk image is malformed
01-09 09:59:50.941: E/DefaultDatabaseErrorHandler(15915): Corruption reported by sqlite on database: /data/data/myapp/databases/services.sqlite
01-09 09:59:50.941: E/DefaultDatabaseErrorHandler(15915): deleting the database file: /data/data/myapp/databases/services.sqlite
01-09 09:59:50.991: E/SQLiteLog(15915): (1) no such table: services
01-09 09:59:50.991: D/AndroidRuntime(15915): Shutting down VM
01-09 09:59:50.991: W/dalvikvm(15915): threadid=1: thread exiting with uncaught exception (group=0x40c3c930)
01-09 09:59:50.991: E/AndroidRuntime(15915): FATAL EXCEPTION: main
01-09 09:59:50.991: E/AndroidRuntime(15915): java.lang.RuntimeException: Unable to start activity ComponentInfo{myapp/myapp.MainActivity}: android.database.sqlite.SQLiteException: no such table: services (code 1): , while compiling: (my query)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.os.Looper.loop(Looper.java:137)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.ActivityThread.main(ActivityThread.java:5039)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at java.lang.reflect.Method.invokeNative(Native Method)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at java.lang.reflect.Method.invoke(Method.java:511)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at dalvik.system.NativeStart.main(Native Method)
01-09 09:59:50.991: E/AndroidRuntime(15915): Caused by: android.database.sqlite.SQLiteException: no such table: services (code 1): , while compiling: (my query)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at myapp.c.f(Unknown Source)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at myapp.bk.a(Unknown Source)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at myapp.MainActivity.onCreate(Unknown Source)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.Activity.performCreate(Activity.java:5104)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
01-09 09:59:50.991: E/AndroidRuntime(15915):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
01-09 09:59:50.991: E/AndroidRuntime(15915):    ... 11 more

创建和升级数据库的代码如下：

public void createDatabase() throws IOException {
    boolean dbExist = checkDatabase();

    if(dbExist) {
        this.getWritableDatabase();
    }

    dbExist = checkDatabase();
    SQLiteDatabase db_Read = null;

    if(!dbExist) {
        db_Read = this.getReadableDatabase();
        try {
            copyDatabase();
        } catch(IOException e) {
            throw new Error ("Error copying database");
        }
    }
}

private boolean checkDatabase(){

    SQLiteDatabase checkDB = null;

    try{
        String myPath = DB_PATH + DB_NAME;
        checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
    }catch(SQLiteException e){
        //database does't exist yet.
    }

    if(checkDB != null){
        checkDB.close();
    }

    return checkDB != null ? true : false;
}

private void copyDatabase() throws IOException {

    InputStream myInput = myContext.getAssets().open(DB_NAME);

    String outFileName = DB_PATH + DB_NAME;
    OutputStream myOutput = new FileOutputStream(outFileName);

    byte[] buffer = new byte[1024];
    int length;
    while((length = myInput.read(buffer))>0) {
        myOutput.write(buffer, 0, length);
    }
    myOutput.flush();
    myOutput.close();
    myInput.close();
}


public SQLiteDatabase openDatabase() throws SQLException {
    String myPath = DB_PATH + DB_NAME;
    myDatabase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
    return myDatabase;
}


@Override
public synchronized void close() {
    if(myDatabase != null) {
        myDatabase.close();
    }
    super.close();
}

@Override
public void onUpgrade (SQLiteDatabase db, int oldVersion, int newVersion) {
    sc.updatedDB = true;
    if (newVersion > oldVersion) {
        try { 
            copyDatabase(); 
        } catch (IOException e) { 
            throw new Error("Error upgrading database"); 
        } 
    }   
}
4

3 回答 3

1

在创建输出流之前，您可以通过在 copyDb 方法中添加 close() 语句来避免此问题：

InputStream myInput = myContext.getAssets().open(DB_NAME);

String outFileName = DB_PATH + DB_NAME;

     if(myDataBase != null)
        myDataBase.close();

OutputStream myOutput = new FileOutputStream(outFileName);
于 2013-06-28T19:43:55.683 回答
0

问题出在您的 onUpgrade 方法中。它不工作。您不能使用 onUpdate 方法中的新文件覆盖 db 文件。第一个参数是一个 db (SQLiteDatabase db)，它已经打开。所以你不能用你的新文件覆盖打开的数据库文件。在调试器中检查这个。

也许您的代码中还有其他错误...

于 2013-01-09T11:17:40.317 回答
0

您的错误日志说您应该有一个表名“服务”但它没有找到它，请检查您的数据库创建代码，也许您在创建查询中犯了错误。

于 2013-01-09T09:14:55.100 回答